Initial service DAV module

lib/vendor/sabre/http/.github/workflows/ci.yml

@@ -0,0 +1,68 @@
+name: continuous-integration
+on:
+  push:
+    branches:
+      - master
+      - release/*
+  pull_request:
+jobs:
+  unit-testing:
+    name: PHPUnit (PHP ${{ matrix.php-versions }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
+        coverage: ['xdebug']
+        code-style: ['yes']
+        code-analysis: ['no']
+        include:
+          - php-versions: '7.1'
+            code-style: 'yes'
+            code-analysis: 'yes'
+          - php-versions: '8.4'
+            code-style: 'yes'
+            code-analysis: 'yes'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+
+      - name: Setup PHP, with composer and extensions
+        uses: shivammathur/setup-php@v2 #https://github.com/shivammathur/setup-php
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: ctype, curl, mbstring, xdebug
+          coverage: ${{ matrix.coverage }}
+          tools: composer
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache composer dependencies
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install composer dependencies
+        run: composer install --no-progress --prefer-dist --optimize-autoloader
+
+      - name: Code Analysis (PHP CS-Fixer)
+        if: matrix.code-style == 'yes'
+        run: PHP_CS_FIXER_IGNORE_ENV=true php vendor/bin/php-cs-fixer fix --dry-run --diff
+
+      - name: Code Analysis (PHPStan)
+        if: matrix.code-analysis == 'yes'
+        run: composer phpstan
+
+      - name: Run application server
+        run: php -S localhost:8000 -t tests/www 2>/dev/null &
+
+      - name: Test with phpunit
+        run: vendor/bin/phpunit --configuration tests/phpunit.xml --coverage-clover clover.xml
+
+      - name: Code Coverage
+        uses: codecov/codecov-action@v5
+        if: matrix.coverage != 'none'

lib/vendor/sabre/http/.gitignore

@@ -0,0 +1,9 @@
+# Composer
+vendor/
+composer.lock
+
+# Tests
+tests/cov/
+.phpunit.result.cache
+.php_cs.cache
+.php-cs-fixer.cache

lib/vendor/sabre/http/.php-cs-fixer.dist.php

@@ -0,0 +1,17 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->exclude('vendor')
+    ->in(__DIR__);
+
+$config = new PhpCsFixer\Config();
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' => true,
+    'nullable_type_declaration' => [
+        'syntax' => 'question_mark',
+    ],
+    'nullable_type_declaration_for_default_null_value' => true,
+]);
+$config->setFinder($finder);
+return $config;

lib/vendor/sabre/http/.php_cs.dist

@@ -0,0 +1,12 @@
+<?php
+
+$config = PhpCsFixer\Config::create();
+$config->getFinder()
+    ->exclude('vendor')
+    ->in(__DIR__);
+$config->setRules([
+    '@PSR1' => true,
+    '@Symfony' => true
+]);
+
+return $config;

lib/vendor/sabre/http/CHANGELOG.md

@@ -0,0 +1,403 @@
+ChangeLog
+=========
+
+5.1.13 (2025-09-09)
+------------------
+
+* #262 properly compute absolute URL (@skjnldsv)
+
+5.1.12 (2024-08-27)
+------------------
+
+* #243 add cs-fixer v3 (@phil-davis)
+
+5.1.11 (2024-07-26)
+------------------
+
+* #241 PHP 8.4 compliance (@phil-davis)
+
+5.1.10 (2023-08-18)
+------------------
+
+* #225 Enhance tests/bootstrap.php to find autoloader in more environments (@phil-davis)
+
+5.1.9 (2023-08-17)
+------------------
+
+* #223 skip testParseMimeTypeOnInvalidMimeType (@phil-davis)
+
+5.1.8 (2023-08-17)
+------------------
+
+* #215 Improve CURLOPT_HTTPHEADER Setting Assignment (@amrita-shrestha)
+
+5.1.7 (2023-06-26)
+------------------
+
+* #98 and #176 Add more tests (@peter279k)
+* #207 fix: handle client disconnect properly with ignore_user_abort true (@kesselb)
+
+5.1.6 (2022-07-15)
+------------------
+
+* #187 Allow testSendToGetLargeContent peak memory usage to be specified externally (@phil-davis)
+* #188 Fix various small typos and grammar (@phil-davis)
+* #189 Fix typo in text of status code 203 'Non-Authoritative Information' (@phil-davis)
+
+5.1.5 (2022-07-09)
+------------------
+
+* #184 Remove 4GB file size workaround for 32bit OS / Stream Videos on IOS (@schoetju)
+
+5.1.4 (2022-06-24)
+------------------
+
+* #182 Fix encoding detection on PHP 8.1 (@come-nc)
+
+5.1.3 (2021-11-04)
+------------------
+
+* #179 version bump that was missed in 5.1.2 (@phil-davis)
+
+5.1.2 (2021-11-04)
+-------------------------
+
+* #169 Ensure $_SERVER keys are read as strings (@fredrik-eriksson)
+* #170 Fix deprecated usages on PHP 8.1 (@cedric-anne)
+* #175 Add resource size to CURL options in client (from #172 ) (@Dartui)
+
+5.1.1 (2020-10-03)
+-------------------------
+
+* #160: Added support for PHP 8.0 (@phil-davis)
+
+5.1.0 (2020-01-31)
+-------------------------
+
+* Added support for PHP 7.4, dropped support for PHP 7.0 (@phil-davis)
+* Updated testsuite for phpunit8, added phpstan coverage (@phil-davis)
+* Added autoload-dev for test classes (@C0pyR1ght)
+
+5.0.5 (2019-11-28)
+-------------------------
+
+* #138: Fixed possible infinite loop (@dpakach, @vfreex, @phil-davis)
+* #136: Improvement regex content-range (@ho4ho)
+
+5.0.4 (2019-10-08)
+-------------------------
+
+* #133: Fix short Content-Range download - Regression from 5.0.3 (@phil-davis)
+
+5.0.3 (2019-10-08)
+-------------------------
+
+* #119: Significantly improve file download speed by enabling mmap based stream_copy_to_stream (@vfreex) 
+
+5.0.2 (2019-09-12)
+-------------------------
+
+* #125: Fix Strict Error if Response Body Empty (@WorksDev, @phil-davis) 
+
+5.0.1 (2019-09-11)
+-------------------------
+
+* #121: fix "Trying to access array offset on value of type bool" in 7.4 (@remicollet) 
+* #115: Reduce memory footprint when parsing HTTP result (@Gasol)
+* #114: Misc code improvements (@mrcnpdlk)
+* #111, #118: Added phpstan analysis (@DeepDiver1975, @staabm)
+* #107: Tested with php 7.3 (@DeepDiver1975)
+ 
+
+5.0.0 (2018-06-04)
+-------------------------
+
+* #99: Previous CURL opts are not persisted anymore (@christiaan)
+* Final release
+
+5.0.0-alpha1 (2018-02-16)
+-------------------------
+
+* Now requires PHP 7.0+.
+* Supports sabre/event 4.x and 5.x
+* Depends on sabre/uri 2.
+* hhvm is no longer supported starting this release.
+* #65: It's now possible to supply request/response bodies using a callback
+  functions. This allows very high-speed/low-memory responses to be created.
+  (@petrkotek).
+* Strict typing is used everywhere this is applicable.
+* Removed `URLUtil` class. It was deprecated a long time ago, and most of
+  its functions moved to the `sabre/uri` package.
+* Removed `Util` class. Most of its functions moved to the `functions.php`
+  file.
+* #68: The `$method` and `$uri` arguments when constructing a Request object
+  are now required.
+* When `Sapi::getRequest()` is called, we default to setting the HTTP Method
+  to `CLI`.
+* The HTTP response is now initialized with HTTP code `500` instead of `null`,
+  so if it's not changed, it will be emitted as 500.
+* #69: Sending `charset="UTF-8"` on Basic authentication challenges per
+  [rfc7617][rfc7617].
+* #84: Added support for `SERVER_PROTOCOL HTTP/2.0` (@jens1o)
+
+
+4.2.3 (2017-06-12)
+------------------
+
+* #74, #77: Work around 4GB file size limit at 32-Bit systems
+
+
+4.2.2 (2017-01-02)
+------------------
+
+* #72: Handling clients that send invalid `Content-Length` headers.
+
+
+4.2.1 (2016-01-06)
+------------------
+
+* #56: `getBodyAsString` now returns at most as many bytes as the contents of
+  the `Content-Length` header. This allows users to pass much larger strings
+  without having to copy and truncate them.
+* The client now sets a default `User-Agent` header identifying this library.
+
+
+4.2.0 (2016-01-04)
+------------------
+
+* This package now supports sabre/event 3.0.
+
+
+4.1.0 (2015-09-04)
+------------------
+
+* The async client wouldn't `wait()` for new http requests being started
+  after the (previous) last request in the queue was resolved.
+* Added `Sabre\HTTP\Auth\Bearer`, to easily extract a OAuth2 bearer token.
+
+
+4.0.0 (2015-05-20)
+------------------
+
+* Deprecated: All static functions from `Sabre\HTTP\URLUtil` and
+  `Sabre\HTTP\Util` moved to a separate `functions.php`, which is also
+  autoloaded. The old functions are still there, but will be removed in a
+  future version. (#49)
+
+
+4.0.0-alpha3 (2015-05-19)
+-------------------------
+
+* Added a parser for the HTTP `Prefer` header, as defined in [RFC7240][rfc7240].
+* Deprecated `Sabre\HTTP\Util::parseHTTPDate`, use `Sabre\HTTP\parseDate()`.
+* Deprecated `Sabre\HTTP\Util::toHTTPDate` use `Sabre\HTTP\toDate()`.
+
+
+4.0.0-alpha2 (2015-05-18)
+-------------------------
+
+* #45: Don't send more data than what is promised in the HTTP content-length.
+  (@dratini0).
+* #43: `getCredentials` returns null if incomplete. (@Hywan)
+* #48: Now using php-cs-fixer to make our CS consistent (yay!)
+* This includes fixes released in version 3.0.5.
+
+
+4.0.0-alpha1 (2015-02-25)
+-------------------------
+
+* #41: Fixing bugs related to comparing URLs in `Request::getPath()`.
+* #41: This library now uses the `sabre/uri` package for uri handling.
+* Added `421 Misdirected Request` from the HTTP/2.0 spec.
+
+
+3.0.5 (2015-05-11)
+------------------
+
+* #47 #35: When re-using the client and doing any request after a `HEAD`
+  request, the client discards the body.
+
+
+3.0.4 (2014-12-10)
+------------------
+
+* #38: The Authentication helpers no longer overwrite any existing
+  `WWW-Authenticate` headers, but instead append new headers. This ensures
+  that multiple authentication systems can exist in the same environment.
+
+
+3.0.3 (2014-12-03)
+------------------
+
+* Hiding `Authorization` header value from `Request::__toString`.
+
+
+3.0.2 (2014-10-09)
+------------------
+
+* When parsing `Accept:` headers, we're ignoring invalid parts. Before we
+  would throw a PHP E_NOTICE.
+
+
+3.0.1 (2014-09-29)
+------------------
+
+* Minor change in unittests.
+
+
+3.0.0 (2014-09-23)
+------------------
+
+* `getHeaders()` now returns header values as an array, just like psr/http.
+* Added `hasHeader()`.
+
+
+2.1.0-alpha1 (2014-09-15)
+-------------------------
+
+* Changed: Copied most of the header-semantics for the PSR draft for
+  representing HTTP messages. [Reference here][psr-http].
+* This means that `setHeaders()` does not wipe out every existing header
+  anymore.
+* We also support multiple headers with the same name.
+* Use `Request::getHeaderAsArray()` and `Response::getHeaderAsArray()` to
+  get a hold off multiple headers with the same name.
+* If you use `getHeader()`, and there's more than 1 header with that name, we
+  concatenate all these with a comma.
+* `addHeader()` will now preserve an existing header with that name, and add a
+  second header with the same name.
+* The message class should be a lot faster now for looking up headers. No more
+  array traversal, because we maintain a tiny index.
+* Added: `URLUtil::resolve()` to make resolving relative urls super easy.
+* Switched to PSR-4.
+* #12: Circumventing CURL's FOLLOW_LOCATION and doing it in PHP instead. This
+  fixes compatibility issues with people that have open_basedir turned on.
+* Added: Content negotiation now correctly support mime-type parameters such as
+  charset.
+* Changed: `Util::negotiate()` is now deprecated. Use
+  `Util::negotiateContentType()` instead.
+* #14: The client now only follows http and https urls.
+
+
+2.0.4 (2014-07-14)
+------------------
+
+* Changed: No longer escaping @ in urls when it's not needed.
+* Fixed: #7: Client now correctly deals with responses without a body.
+
+
+2.0.3 (2014-04-17)
+------------------
+
+* Now works on hhvm!
+* Fixed: Now throwing an error when a Request object is being created with
+  arguments that were valid for sabre/http 1.0. Hopefully this will aid with
+  debugging for upgraders.
+
+
+2.0.2 (2014-02-09)
+------------------
+
+* Fixed: Potential security problem in the client.
+
+
+2.0.1 (2014-01-09)
+------------------
+
+* Fixed: getBodyAsString on an empty body now works.
+* Fixed: Version string
+
+
+2.0.0 (2014-01-08)
+------------------
+
+* Removed: Request::createFromPHPRequest. This is now handled by
+  Sapi::getRequest.
+
+
+2.0.0alpha6 (2014-01-03)
+------------------------
+
+* Added: Asynchronous HTTP client. See examples/asyncclient.php.
+* Fixed: Issue #4: Don't escape colon (:) when it's not needed.
+* Fixed: Fixed a bug in the content negotation script.
+* Fixed: Fallback for when CURLOPT_POSTREDIR is not defined (mainly for hhvm).
+* Added: The Request and Response object now have a `__toString()` method that
+  serializes the objects into a standard HTTP message. This is mainly for
+  debugging purposes.
+* Changed: Added Response::getStatusText(). This method returns the
+  human-readable HTTP status message. This part has been removed from
+  Response::getStatus(), which now always returns just the status code as an
+  int.
+* Changed: Response::send() is now Sapi::sendResponse($response).
+* Changed: Request::createFromPHPRequest is now Sapi::getRequest().
+* Changed: Message::getBodyAsStream and Message::getBodyAsString were added. The
+  existing Message::getBody changed its behavior, so be careful.
+
+
+2.0.0alpha5 (2013-11-07)
+------------------------
+
+* Added: HTTP Status 451 Unavailable For Legal Reasons. Fight government
+  censorship!
+* Added: Ability to catch and retry http requests in the client when a curl
+  error occurs.
+* Changed: Request::getPath does not return the query part of the url, so
+  everything after the ? is stripped.
+* Added: a reverse proxy example.
+
+
+2.0.0alpha4 (2013-08-07)
+------------------------
+
+* Fixed: Doing a GET request with the client uses the last used HTTP method
+  instead.
+* Added: HttpException
+* Added: The Client class can now automatically emit exceptions when HTTP errors
+  occurred.
+
+
+2.0.0alpha3 (2013-07-24)
+------------------------
+
+* Changed: Now depends on sabre/event package.
+* Changed: setHeaders() now overwrites any existing http headers.
+* Added: getQueryParameters to RequestInterface.
+* Added: Util::negotiate.
+* Added: RequestDecorator, ResponseDecorator.
+* Added: A very simple HTTP client.
+* Added: addHeaders() to append a list of new headers.
+* Fixed: Not erroring on unknown HTTP status codes.
+* Fixed: Throwing exceptions on invalid HTTP status codes (not 3 digits).
+* Fixed: Much better README.md
+* Changed: getBody() now uses a bitfield to specify what type to return.
+
+
+2.0.0alpha2 (2013-07-02)
+------------------------
+
+* Added: Digest & AWS Authentication.
+* Added: Message::getHttpVersion and Message::setHttpVersion.
+* Added: Request::setRawServerArray, getRawServerValue.
+* Added: Request::createFromPHPRequest
+* Added: Response::send
+* Added: Request::getQueryParameters
+* Added: Utility for dealing with HTTP dates.
+* Added: Request::setPostData and Request::getPostData.
+* Added: Request::setAbsoluteUrl and Request::getAbsoluteUrl.
+* Added: URLUtil, methods for calculation relative and base urls.
+* Removed: Response::sendBody
+
+
+2.0.0alpha1 (2012-10-07)
+------------------------
+
+* Fixed: Lots of small naming improvements
+* Added: Introduction of Message, MessageInterface, Response, ResponseInterface.
+
+Before 2.0.0, this package was built-into SabreDAV, where it first appeared in
+January 2009.
+
+[psr-http]: https://github.com/php-fig/fig-standards/blob/master/proposed/http-message.md
+[rfc7240]: http://tools.ietf.org/html/rfc7240
+[rfc7617]: https://tools.ietf.org/html/rfc7617

lib/vendor/sabre/http/LICENSE

@@ -0,0 +1,27 @@
+Copyright (C) 2009-2017 fruux GmbH (https://fruux.com/)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name Sabre nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.

lib/vendor/sabre/http/README.md

@@ -0,0 +1,747 @@
+sabre/http
+==========
+
+This library provides a toolkit to make working with the [HTTP protocol](https://tools.ietf.org/html/rfc2616) easier.
+
+Most PHP scripts run within a HTTP request but accessing information about the
+HTTP request is cumbersome at least.
+
+There's bad practices, inconsistencies and confusion. This library is
+effectively a wrapper around the following PHP constructs:
+
+For Input:
+
+* `$_GET`,
+* `$_POST`,
+* `$_SERVER`,
+* `php://input` or `$HTTP_RAW_POST_DATA`.
+
+For output:
+
+* `php://output` or `echo`,
+* `header()`.
+
+What this library provides, is a `Request` object, and a `Response` object.
+
+The objects are extendable and easily mockable.
+
+Build status
+------------
+
+| branch | status                                                                                                        |
+|--------|---------------------------------------------------------------------------------------------------------------|
+| master | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=master)](https://travis-ci.org/sabre-io/http) |
+| 4.2    | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=4.2)](https://travis-ci.org/sabre-io/http)    |
+| 3.0    | [![Build Status](https://travis-ci.org/sabre-io/http.svg?branch=3.0)](https://travis-ci.org/sabre-io/http)    |
+
+Installation
+------------
+
+Make sure you have [composer][1] installed. In your project directory, create,
+or edit a `composer.json` file, and make sure it contains something like this:
+
+```json
+{
+    "require" : {
+        "sabre/http" : "~5.0.0"
+    }
+}
+```
+
+After that, just hit `composer install` and you should be rolling.
+
+Quick history
+-------------
+
+This library came to existence in 2009, as a part of the [`sabre/dav`][2]
+project, which uses it heavily.
+
+It got split off into a separate library to make it easier to manage
+releases and hopefully giving it use outside of the scope of just `sabre/dav`.
+
+Although completely independently developed, this library has a LOT of
+overlap with [Symfony's `HttpFoundation`][3].
+
+Said library does a lot more stuff and is significantly more popular,
+so if you are looking for something to fulfill this particular requirement,
+I'd recommend also considering [`HttpFoundation`][3].
+
+
+Getting started
+---------------
+
+First and foremost, this library wraps the superglobals. The easiest way to
+instantiate a request object is as follows:
+
+```php
+use Sabre\HTTP;
+
+include 'vendor/autoload.php';
+
+$request = HTTP\Sapi::getRequest();
+```
+
+This line should only happen once in your entire application. Everywhere else
+you should pass this request object around using dependency injection.
+
+You should always typehint on its interface:
+
+```php
+function handleRequest(HTTP\RequestInterface $request) {
+
+    // Do something with this request :)
+
+}
+```
+
+A response object you can just create as such:
+
+```php
+use Sabre\HTTP;
+
+include 'vendor/autoload.php';
+
+$response = new HTTP\Response();
+$response->setStatus(201); // created !
+$response->setHeader('X-Foo', 'bar');
+$response->setBody(
+    'success!'
+);
+
+```
+
+After you fully constructed your response, you must call:
+
+```php
+HTTP\Sapi::sendResponse($response);
+```
+
+This line should generally also appear once in your application (at the very
+end).
+
+Decorators
+----------
+
+It may be useful to extend the `Request` and `Response` objects in your
+application, if you for example would like them to carry a bit more
+information about the current request.
+
+For instance, you may want to add an `isLoggedIn` method to the Request
+object.
+
+Simply extending Request and Response may pose some problems:
+
+1. You may want to extend the objects with new behaviors differently, in
+   different subsystems of your application,
+2. The `Sapi::getRequest` factory always returns an instance of
+   `Request` so you would have to override the factory method as well,
+3. By controlling the instantiation and depend on specific `Request` and
+   `Response` instances in your library or application, you make it harder to
+   work with other applications which also use `sabre/http`.
+
+In short: it would be bad design. Instead, it's recommended to use the
+[decorator pattern][6] to add new behavior where you need it. `sabre/http`
+provides helper classes to quickly do this.
+
+Example:
+
+```php
+use Sabre\HTTP;
+
+class MyRequest extends HTTP\RequestDecorator {
+
+    function isLoggedIn() {
+
+        return true;
+
+    }
+
+}
+```
+
+Our application assumes that the true `Request` object was instantiated
+somewhere else, by some other subsystem. This could simply be a call like
+`$request = Sapi::getRequest()` at the top of your application,
+but could also be somewhere in a unit test.
+
+All we know in the current subsystem, is that we received a `$request` and
+that it implements `Sabre\HTTP\RequestInterface`. To decorate this object,
+all we need to do is:
+
+```php
+$request = new MyRequest($request);
+```
+
+And that's it, we now have an `isLoggedIn` method, without having to mess
+with the core instances.
+
+
+Client
+------
+
+This package also contains a simple wrapper around [cURL][4], which will allow
+you to write simple clients, using the `Request` and `Response` objects you're
+already familiar with.
+
+It's by no means a replacement for something like [Guzzle][7], but it provides
+a simple and lightweight API for making the occasional API call.
+
+### Usage
+
+```php
+use Sabre\HTTP;
+
+$request = new HTTP\Request('GET', 'http://example.org/');
+$request->setHeader('X-Foo', 'Bar');
+
+$client = new HTTP\Client();
+$response = $client->send($request);
+
+echo $response->getBodyAsString();
+```
+
+The client emits 3 event using [`sabre/event`][5]. `beforeRequest`,
+`afterRequest` and `error`.
+
+```php
+$client = new HTTP\Client();
+$client->on('beforeRequest', function($request) {
+
+    // You could use beforeRequest to for example inject a few extra headers.
+    // into the Request object.
+
+});
+
+$client->on('afterRequest', function($request, $response) {
+
+    // The afterRequest event could be a good time to do some logging, or
+    // do some rewriting in the response.
+
+});
+
+$client->on('error', function($request, $response, &$retry, $retryCount) {
+
+    // The error event is triggered for every response with a HTTP code higher
+    // than 399.
+
+});
+
+$client->on('error:401', function($request, $response, &$retry, $retryCount) {
+
+    // You can also listen for specific error codes. This example shows how
+    // to inject HTTP authentication headers if a 401 was returned.
+
+    if ($retryCount > 1) {
+        // We're only going to retry exactly once.
+    }
+
+    $request->setHeader('Authorization', 'Basic xxxxxxxxxx');
+    $retry = true;
+
+});
+```
+
+### Asynchronous requests
+
+The `Client` also supports doing asynchronous requests. This is especially handy
+if you need to perform a number of requests, that are allowed to be executed
+in parallel.
+
+The underlying system for this is simply [cURL's multi request handler][8],
+but this provides a much nicer API to handle this.
+
+Sample usage:
+
+```php
+
+use Sabre\HTTP;
+
+$request = new Request('GET', 'http://localhost/');
+$client = new Client();
+
+// Executing 1000 requests
+for ($i = 0; $i < 1000; $i++) {
+    $client->sendAsync(
+        $request,
+        function(ResponseInterface $response) {
+            // Success handler
+        },
+        function($error) {
+            // Error handler
+        }
+    ); 
+}
+
+// Wait for all requests to get a result.
+$client->wait();
+
+```
+
+Check out `examples/asyncclient.php` for more information.
+
+Writing a reverse proxy
+-----------------------
+
+With all these tools combined, it becomes very easy to write a simple reverse
+http proxy.
+
+```php
+use
+    Sabre\HTTP\Sapi,
+    Sabre\HTTP\Client;
+
+// The url we're proxying to.
+$remoteUrl = 'http://example.org/';
+
+// The url we're proxying from. Please note that this must be a relative url,
+// and basically acts as the base url.
+//
+// If your $remoteUrl doesn't end with a slash, this one probably shouldn't
+// either.
+$myBaseUrl = '/reverseproxy.php';
+// $myBaseUrl = '/~evert/sabre/http/examples/reverseproxy.php/';
+
+$request = Sapi::getRequest();
+$request->setBaseUrl($myBaseUrl);
+
+$subRequest = clone $request;
+
+// Removing the Host header.
+$subRequest->removeHeader('Host');
+
+// Rewriting the url.
+$subRequest->setUrl($remoteUrl . $request->getPath());
+
+$client = new Client();
+
+// Sends the HTTP request to the server
+$response = $client->send($subRequest);
+
+// Sends the response back to the client that connected to the proxy.
+Sapi::sendResponse($response);
+```
+
+The Request and Response API's
+------------------------------
+
+### Request
+
+```php
+
+/**
+ * Creates the request object
+ *
+ * @param string $method
+ * @param string $url
+ * @param array $headers
+ * @param resource $body
+ */
+public function __construct($method = null, $url = null, array $headers = null, $body = null);
+
+/**
+ * Returns the current HTTP method
+ *
+ * @return string
+ */
+function getMethod();
+
+/**
+ * Sets the HTTP method
+ *
+ * @param string $method
+ * @return void
+ */
+function setMethod($method);
+
+/**
+ * Returns the request url.
+ *
+ * @return string
+ */
+function getUrl();
+
+/**
+ * Sets the request url.
+ *
+ * @param string $url
+ * @return void
+ */
+function setUrl($url);
+
+/**
+ * Returns the absolute url.
+ *
+ * @return string
+ */
+function getAbsoluteUrl();
+
+/**
+ * Sets the absolute url.
+ *
+ * @param string $url
+ * @return void
+ */
+function setAbsoluteUrl($url);
+
+/**
+ * Returns the current base url.
+ *
+ * @return string
+ */
+function getBaseUrl();
+
+/**
+ * Sets a base url.
+ *
+ * This url is used for relative path calculations.
+ *
+ * The base url should default to /
+ *
+ * @param string $url
+ * @return void
+ */
+function setBaseUrl($url);
+
+/**
+ * Returns the relative path.
+ *
+ * This is being calculated using the base url. This path will not start
+ * with a slash, so it will always return something like
+ * 'example/path.html'.
+ *
+ * If the full path is equal to the base url, this method will return an
+ * empty string.
+ *
+ * This method will also urldecode the path, and if the url was encoded as
+ * ISO-8859-1, it will convert it to UTF-8.
+ *
+ * If the path is outside the base url, a LogicException will be thrown.
+ *
+ * @return string
+ */
+function getPath();
+
+/**
+ * Returns the list of query parameters.
+ *
+ * This is equivalent to PHP's $_GET superglobal.
+ *
+ * @return array
+ */
+function getQueryParameters();
+
+/**
+ * Returns the POST data.
+ *
+ * This is equivalent to PHP's $_POST superglobal.
+ *
+ * @return array
+ */
+function getPostData();
+
+/**
+ * Sets the post data.
+ *
+ * This is equivalent to PHP's $_POST superglobal.
+ *
+ * This would not have been needed, if POST data was accessible as
+ * php://input, but unfortunately we need to special case it.
+ *
+ * @param array $postData
+ * @return void
+ */
+function setPostData(array $postData);
+
+/**
+ * Returns an item from the _SERVER array.
+ *
+ * If the value does not exist in the array, null is returned.
+ *
+ * @param string $valueName
+ * @return string|null
+ */
+function getRawServerValue($valueName);
+
+/**
+ * Sets the _SERVER array.
+ *
+ * @param array $data
+ * @return void
+ */
+function setRawServerData(array $data);
+
+/**
+ * Returns the body as a readable stream resource.
+ *
+ * Note that the stream may not be rewindable, and therefore may only be
+ * read once.
+ *
+ * @return resource
+ */
+function getBodyAsStream();
+
+/**
+ * Returns the body as a string.
+ *
+ * Note that because the underlying data may be based on a stream, this
+ * method could only work correctly the first time.
+ *
+ * @return string
+ */
+function getBodyAsString();
+
+/**
+ * Returns the message body, as its internal representation.
+ *
+ * This could be either a string or a stream.
+ *
+ * @return resource|string
+ */
+function getBody();
+
+/**
+ * Updates the body resource with a new stream.
+ *
+ * @param resource $body
+ * @return void
+ */
+function setBody($body);
+
+/**
+ * Returns all the HTTP headers as an array.
+ *
+ * @return array
+ */
+function getHeaders();
+
+/**
+ * Returns a specific HTTP header, based on its name.
+ *
+ * The name must be treated as case-insensitive.
+ *
+ * If the header does not exist, this method must return null.
+ *
+ * @param string $name
+ * @return string|null
+ */
+function getHeader($name);
+
+/**
+ * Updates a HTTP header.
+ *
+ * The case-sensitivity of the name value must be retained as-is.
+ *
+ * @param string $name
+ * @param string $value
+ * @return void
+ */
+function setHeader($name, $value);
+
+/**
+ * Resets HTTP headers
+ *
+ * This method overwrites all existing HTTP headers
+ *
+ * @param array $headers
+ * @return void
+ */
+function setHeaders(array $headers);
+
+/**
+ * Adds a new set of HTTP headers.
+ *
+ * Any header specified in the array that already exists will be
+ * overwritten, but any other existing headers will be retained.
+ *
+ * @param array $headers
+ * @return void
+ */
+function addHeaders(array $headers);
+
+/**
+ * Removes a HTTP header.
+ *
+ * The specified header name must be treated as case-insensitive.
+ * This method should return true if the header was successfully deleted,
+ * and false if the header did not exist.
+ *
+ * @return bool
+ */
+function removeHeader($name);
+
+/**
+ * Sets the HTTP version.
+ *
+ * Should be 1.0, 1.1 or 2.0.
+ *
+ * @param string $version
+ * @return void
+ */
+function setHttpVersion($version);
+
+/**
+ * Returns the HTTP version.
+ *
+ * @return string
+ */
+function getHttpVersion();
+```
+
+### Response
+
+```php
+/**
+ * Returns the current HTTP status.
+ *
+ * This is the status-code as well as the human-readable string.
+ *
+ * @return string
+ */
+function getStatus();
+
+/**
+ * Sets the HTTP status code.
+ *
+ * This can be either the full HTTP status code with human-readable string,
+ * for example: "403 I can't let you do that, Dave".
+ *
+ * Or just the code, in which case the appropriate default message will be
+ * added.
+ *
+ * @param string|int $status
+ * @throws \InvalidArgumentExeption
+ * @return void
+ */
+function setStatus($status);
+
+/**
+ * Returns the body as a readable stream resource.
+ *
+ * Note that the stream may not be rewindable, and therefore may only be
+ * read once.
+ *
+ * @return resource
+ */
+function getBodyAsStream();
+
+/**
+ * Returns the body as a string.
+ *
+ * Note that because the underlying data may be based on a stream, this
+ * method could only work correctly the first time.
+ *
+ * @return string
+ */
+function getBodyAsString();
+
+/**
+ * Returns the message body, as its internal representation.
+ *
+ * This could be either a string or a stream.
+ *
+ * @return resource|string
+ */
+function getBody();
+
+
+/**
+ * Updates the body resource with a new stream.
+ *
+ * @param resource $body
+ * @return void
+ */
+function setBody($body);
+
+/**
+ * Returns all the HTTP headers as an array.
+ *
+ * @return array
+ */
+function getHeaders();
+
+/**
+ * Returns a specific HTTP header, based on its name.
+ *
+ * The name must be treated as case-insensitive.
+ *
+ * If the header does not exist, this method must return null.
+ *
+ * @param string $name
+ * @return string|null
+ */
+function getHeader($name);
+
+/**
+ * Updates a HTTP header.
+ *
+ * The case-sensitivity of the name value must be retained as-is.
+ *
+ * @param string $name
+ * @param string $value
+ * @return void
+ */
+function setHeader($name, $value);
+
+/**
+ * Resets HTTP headers
+ *
+ * This method overwrites all existing HTTP headers
+ *
+ * @param array $headers
+ * @return void
+ */
+function setHeaders(array $headers);
+
+/**
+ * Adds a new set of HTTP headers.
+ *
+ * Any header specified in the array that already exists will be
+ * overwritten, but any other existing headers will be retained.
+ *
+ * @param array $headers
+ * @return void
+ */
+function addHeaders(array $headers);
+
+/**
+ * Removes a HTTP header.
+ *
+ * The specified header name must be treated as case-insensitive.
+ * This method should return true if the header was successfully deleted,
+ * and false if the header did not exist.
+ *
+ * @return bool
+ */
+function removeHeader($name);
+
+/**
+ * Sets the HTTP version.
+ *
+ * Should be 1.0, 1.1 or 2.0.
+ *
+ * @param string $version
+ * @return void
+ */
+function setHttpVersion($version);
+
+/**
+ * Returns the HTTP version.
+ *
+ * @return string
+ */
+function getHttpVersion();
+```
+
+Made at fruux
+-------------
+
+This library is being developed by [fruux](https://fruux.com/). Drop us a line for commercial services or enterprise support.
+
+[1]: http://getcomposer.org/
+[2]: http://sabre.io/
+[3]: https://github.com/symfony/HttpFoundation
+[4]: http://php.net/curl
+[5]: https://github.com/fruux/sabre-event
+[6]: http://en.wikipedia.org/wiki/Decorator_pattern
+[7]: http://guzzlephp.org/
+[8]: http://php.net/curl_multi_init

lib/vendor/sabre/http/composer.json

@@ -0,0 +1,64 @@
+{
+    "name": "sabre/http",
+    "description" : "The sabre/http library provides utilities for dealing with http requests and responses. ",
+    "keywords" : [ "HTTP" ],
+    "homepage" : "https://github.com/fruux/sabre-http",
+    "license" : "BSD-3-Clause",
+    "require" : {
+        "php"          : "^7.1 || ^8.0",
+        "ext-mbstring" : "*",
+        "ext-ctype"    : "*",
+        "ext-curl"     : "*",
+        "sabre/event"  : ">=4.0 <6.0",
+        "sabre/uri"    : "^2.0"
+    },
+    "require-dev" : {
+        "friendsofphp/php-cs-fixer": "~2.17.1||3.63.2",
+        "phpstan/phpstan": "^0.12",
+        "phpunit/phpunit" : "^7.5 || ^8.5 || ^9.6"
+    },
+    "suggest" : {
+        "ext-curl" : " to make http requests with the Client class"
+    },
+    "authors" : [
+        {
+            "name" : "Evert Pot",
+            "email" : "me@evertpot.com",
+            "homepage" : "http://evertpot.com/",
+            "role" : "Developer"
+        }
+    ],
+    "support" : {
+        "forum" : "https://groups.google.com/group/sabredav-discuss",
+        "source" : "https://github.com/fruux/sabre-http"
+    },
+    "autoload" : {
+        "files" : [
+            "lib/functions.php"
+        ],
+        "psr-4" : {
+            "Sabre\\HTTP\\" : "lib/"
+        }
+    },
+    "autoload-dev" : {
+        "psr-4" : {
+            "Sabre\\HTTP\\" : "tests/HTTP"
+        }
+    },
+    "scripts": {
+        "phpstan": [
+            "phpstan analyse lib tests"
+        ],
+        "cs-fixer": [
+            "PHP_CS_FIXER_IGNORE_ENV=true php-cs-fixer fix"
+        ],
+        "phpunit": [
+            "phpunit --configuration tests/phpunit.xml"
+        ],
+        "test": [
+            "composer phpstan",
+            "composer cs-fixer",
+            "composer phpunit"
+        ]
+    }
+}

lib/vendor/sabre/http/examples/asyncclient.php

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * This example demonstrates the ability for clients to work asynchronously.
+ *
+ * By default up to 10 requests will be executed in parallel. HTTP connections
+ * are re-used and DNS is cached, all thanks to the power of curl.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+use Sabre\HTTP\Client;
+use Sabre\HTTP\Request;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+// This is the request we're repeating 1000 times.
+$request = new Request('GET', 'http://localhost/');
+$client = new Client();
+
+for ($i = 0; $i < 1000; ++$i) {
+    echo "$i sending\n";
+    $client->sendAsync(
+        $request,
+
+        // This is the 'success' callback
+        function ($response) use ($i) {
+            echo "$i -> ".$response->getStatus()."\n";
+        },
+
+        // This is the 'error' callback. It is called for general connection
+        // problems (such as not being able to connect to a host, dns errors,
+        // etc.) and also cases where a response was returned, but it had a
+        // status code of 400 or higher.
+        function ($error) use ($i) {
+            if (Client::STATUS_CURLERROR === $error['status']) {
+                // Curl errors
+                echo "$i -> curl error: ".$error['curl_errmsg']."\n";
+            } else {
+                // HTTP errors
+                echo "$i -> ".$error['response']->getStatus()."\n";
+            }
+        }
+    );
+}
+
+// After everything is done, we call 'wait'. This causes the client to wait for
+// all outstanding http requests to complete.
+$client->wait();

lib/vendor/sabre/http/examples/basicauth.php

@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * This example shows how to do Basic authentication.
+ * *.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+$userList = [
+    'user1' => 'password',
+    'user2' => 'password',
+];
+
+use Sabre\HTTP\Auth;
+use Sabre\HTTP\Response;
+use Sabre\HTTP\Sapi;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$request = Sapi::getRequest();
+$response = new Response();
+
+$basicAuth = new Auth\Basic('Locked down area', $request, $response);
+if (!$userPass = $basicAuth->getCredentials()) {
+    // No username or password given
+    $basicAuth->requireLogin();
+} elseif (!isset($userList[$userPass[0]]) || $userList[$userPass[0]] !== $userPass[1]) {
+    // Username or password are incorrect
+    $basicAuth->requireLogin();
+} else {
+    // Success !
+    $response->setBody('You are logged in!');
+}
+
+// Sending the response
+Sapi::sendResponse($response);

lib/vendor/sabre/http/examples/client.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * This example shows how to make a HTTP request with the Request and Response
+ * objects.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+use Sabre\HTTP\Client;
+use Sabre\HTTP\Request;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+// Constructing the request.
+$request = new Request('GET', 'http://localhost/');
+
+$client = new Client();
+// $client->addCurlSetting(CURLOPT_PROXY,'localhost:8888');
+$response = $client->send($request);
+
+echo "Response:\n";
+
+echo (string) $response;

lib/vendor/sabre/http/examples/digestauth.php

@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * This example shows how to do Digest authentication.
+ * *.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Markus Staab
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+$userList = [
+    'user1' => 'password',
+    'user2' => 'password',
+];
+
+use Sabre\HTTP\Auth;
+use Sabre\HTTP\Response;
+use Sabre\HTTP\Sapi;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$request = Sapi::getRequest();
+$response = new Response();
+
+$digestAuth = new Auth\Digest('Locked down area', $request, $response);
+$digestAuth->init();
+if (!$userName = $digestAuth->getUsername()) {
+    // No username given
+    $digestAuth->requireLogin();
+} elseif (!isset($userList[$userName]) || !$digestAuth->validatePassword($userList[$userName])) {
+    // Username or password are incorrect
+    $digestAuth->requireLogin();
+} else {
+    // Success !
+    $response->setBody('You are logged in!');
+}
+
+// Sending the response
+Sapi::sendResponse($response);

lib/vendor/sabre/http/examples/reverseproxy.php

@@ -0,0 +1,48 @@
+<?php
+
+// The url we're proxying to.
+$remoteUrl = 'http://example.org/';
+
+// The url we're proxying from. Please note that this must be a relative url,
+// and basically acts as the base url.
+//
+// If your $remoteUrl doesn't end with a slash, this one probably shouldn't
+// either.
+$myBaseUrl = '/reverseproxy.php';
+// $myBaseUrl = '/~evert/sabre/http/examples/reverseproxy.php/';
+
+use Sabre\HTTP\Client;
+use Sabre\HTTP\Sapi;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$request = Sapi::getRequest();
+$request->setBaseUrl($myBaseUrl);
+
+$subRequest = clone $request;
+
+// Removing the Host header.
+$subRequest->removeHeader('Host');
+
+// Rewriting the url.
+$subRequest->setUrl($remoteUrl.$request->getPath());
+
+$client = new Client();
+
+// Sends the HTTP request to the server
+$response = $client->send($subRequest);
+
+// Sends the response back to the client that connected to the proxy.
+Sapi::sendResponse($response);

lib/vendor/sabre/http/examples/stringify.php

@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * This simple example shows the capability of Request and Response objects to
+ * serialize themselves as strings.
+ *
+ * This is mainly useful for debugging purposes.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+
+// Find the autoloader
+$paths = [
+    __DIR__.'/../vendor/autoload.php',
+    __DIR__.'/../../../autoload.php',
+    __DIR__.'/vendor/autoload.php',
+];
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$request = new Request('POST', '/foo');
+$request->setHeaders([
+    'Host' => 'example.org',
+    'Content-Type' => 'application/json',
+]);
+
+$request->setBody(json_encode(['foo' => 'bar']));
+
+echo $request;
+echo "\r\n\r\n";
+
+$response = new Response(424);
+$response->setHeaders([
+    'Content-Type' => 'text/plain',
+    'Connection' => 'close',
+]);
+
+$response->setBody('ABORT! ABORT!');
+
+echo $response;
+
+echo "\r\n";

lib/vendor/sabre/http/lib/Auth/AWS.php

@@ -0,0 +1,220 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP;
+
+/**
+ * HTTP AWS Authentication handler.
+ *
+ * Use this class to leverage amazon's AWS authentication header
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class AWS extends AbstractAuth
+{
+    /**
+     * The signature supplied by the HTTP client.
+     *
+     * @var string
+     */
+    private $signature;
+
+    /**
+     * The accesskey supplied by the HTTP client.
+     *
+     * @var string
+     */
+    private $accessKey;
+
+    /**
+     * An error code, if any.
+     *
+     * This value will be filled with one of the ERR_* constants
+     *
+     * @var int
+     */
+    public $errorCode = 0;
+
+    public const ERR_NOAWSHEADER = 1;
+    public const ERR_MD5CHECKSUMWRONG = 2;
+    public const ERR_INVALIDDATEFORMAT = 3;
+    public const ERR_REQUESTTIMESKEWED = 4;
+    public const ERR_INVALIDSIGNATURE = 5;
+
+    /**
+     * Gathers all information from the headers.
+     *
+     * This method needs to be called prior to anything else.
+     */
+    public function init(): bool
+    {
+        $authHeader = $this->request->getHeader('Authorization');
+
+        if (null === $authHeader) {
+            $this->errorCode = self::ERR_NOAWSHEADER;
+
+            return false;
+        }
+        $authHeader = explode(' ', $authHeader);
+
+        if ('AWS' !== $authHeader[0] || !isset($authHeader[1])) {
+            $this->errorCode = self::ERR_NOAWSHEADER;
+
+            return false;
+        }
+
+        list($this->accessKey, $this->signature) = explode(':', $authHeader[1]);
+
+        return true;
+    }
+
+    /**
+     * Returns the username for the request.
+     */
+    public function getAccessKey(): string
+    {
+        return $this->accessKey;
+    }
+
+    /**
+     * Validates the signature based on the secretKey.
+     */
+    public function validate(string $secretKey): bool
+    {
+        $contentMD5 = $this->request->getHeader('Content-MD5');
+
+        if ($contentMD5) {
+            // We need to validate the integrity of the request
+            $body = $this->request->getBody();
+            $this->request->setBody($body);
+
+            if ($contentMD5 !== base64_encode(md5((string) $body, true))) {
+                // content-md5 header did not match md5 signature of body
+                $this->errorCode = self::ERR_MD5CHECKSUMWRONG;
+
+                return false;
+            }
+        }
+
+        if (!$requestDate = $this->request->getHeader('x-amz-date')) {
+            $requestDate = $this->request->getHeader('Date');
+        }
+
+        if (!$this->validateRFC2616Date((string) $requestDate)) {
+            return false;
+        }
+
+        $amzHeaders = $this->getAmzHeaders();
+
+        $signature = base64_encode(
+            $this->hmacsha1($secretKey,
+                $this->request->getMethod()."\n".
+                $contentMD5."\n".
+                $this->request->getHeader('Content-type')."\n".
+                $requestDate."\n".
+                $amzHeaders.
+                $this->request->getUrl()
+            )
+        );
+
+        if ($this->signature !== $signature) {
+            $this->errorCode = self::ERR_INVALIDSIGNATURE;
+
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Returns an HTTP 401 header, forcing login.
+     *
+     * This should be called when username and password are incorrect, or not supplied at all
+     */
+    public function requireLogin()
+    {
+        $this->response->addHeader('WWW-Authenticate', 'AWS');
+        $this->response->setStatus(401);
+    }
+
+    /**
+     * Makes sure the supplied value is a valid RFC2616 date.
+     *
+     * If we would just use strtotime to get a valid timestamp, we have no way of checking if a
+     * user just supplied the word 'now' for the date header.
+     *
+     * This function also makes sure the Date header is within 15 minutes of the operating
+     * system date, to prevent replay attacks.
+     */
+    protected function validateRFC2616Date(string $dateHeader): bool
+    {
+        $date = HTTP\parseDate($dateHeader);
+
+        // Unknown format
+        if (!$date) {
+            $this->errorCode = self::ERR_INVALIDDATEFORMAT;
+
+            return false;
+        }
+
+        $min = new \DateTime('-15 minutes');
+        $max = new \DateTime('+15 minutes');
+
+        // We allow 15 minutes around the current date/time
+        if ($date > $max || $date < $min) {
+            $this->errorCode = self::ERR_REQUESTTIMESKEWED;
+
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Returns a list of AMZ headers.
+     */
+    protected function getAmzHeaders(): string
+    {
+        $amzHeaders = [];
+        $headers = $this->request->getHeaders();
+        foreach ($headers as $headerName => $headerValue) {
+            if (0 === strpos(strtolower($headerName), 'x-amz-')) {
+                $amzHeaders[strtolower($headerName)] = str_replace(["\r\n"], [' '], $headerValue[0])."\n";
+            }
+        }
+        ksort($amzHeaders);
+
+        $headerStr = '';
+        foreach ($amzHeaders as $h => $v) {
+            $headerStr .= $h.':'.$v;
+        }
+
+        return $headerStr;
+    }
+
+    /**
+     * Generates an HMAC-SHA1 signature.
+     */
+    private function hmacsha1(string $key, string $message): string
+    {
+        if (function_exists('hash_hmac')) {
+            return hash_hmac('sha1', $message, $key, true);
+        }
+
+        $blocksize = 64;
+        if (strlen($key) > $blocksize) {
+            $key = pack('H*', sha1($key));
+        }
+        $key = str_pad($key, $blocksize, chr(0x00));
+        $ipad = str_repeat(chr(0x36), $blocksize);
+        $opad = str_repeat(chr(0x5C), $blocksize);
+        $hmac = pack('H*', sha1(($key ^ $opad).pack('H*', sha1(($key ^ $ipad).$message))));
+
+        return $hmac;
+    }
+}

lib/vendor/sabre/http/lib/Auth/AbstractAuth.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * HTTP Authentication base class.
+ *
+ * This class provides some common functionality for the various base classes.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class AbstractAuth
+{
+    /**
+     * Authentication realm.
+     *
+     * @var string
+     */
+    protected $realm;
+
+    /**
+     * Request object.
+     *
+     * @var RequestInterface
+     */
+    protected $request;
+
+    /**
+     * Response object.
+     *
+     * @var ResponseInterface
+     */
+    protected $response;
+
+    /**
+     * Creates the object.
+     */
+    public function __construct(string $realm, RequestInterface $request, ResponseInterface $response)
+    {
+        $this->realm = $realm;
+        $this->request = $request;
+        $this->response = $response;
+    }
+
+    /**
+     * This method sends the needed HTTP header and status code (401) to force
+     * the user to login.
+     */
+    abstract public function requireLogin();
+
+    /**
+     * Returns the HTTP realm.
+     */
+    public function getRealm(): string
+    {
+        return $this->realm;
+    }
+}

lib/vendor/sabre/http/lib/Auth/Basic.php

@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+/**
+ * HTTP Basic authentication utility.
+ *
+ * This class helps you setup basic auth. The process is fairly simple:
+ *
+ * 1. Instantiate the class.
+ * 2. Call getCredentials (this will return null or a user/pass pair)
+ * 3. If you didn't get valid credentials, call 'requireLogin'
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Basic extends AbstractAuth
+{
+    /**
+     * This method returns a numeric array with a username and password as the
+     * only elements.
+     *
+     * If no credentials were found, this method returns null.
+     *
+     * @return array|null
+     */
+    public function getCredentials()
+    {
+        $auth = $this->request->getHeader('Authorization');
+
+        if (!$auth) {
+            return null;
+        }
+
+        if ('basic ' !== strtolower(substr($auth, 0, 6))) {
+            return null;
+        }
+
+        $credentials = explode(':', base64_decode(substr($auth, 6)), 2);
+
+        if (2 !== count($credentials)) {
+            return null;
+        }
+
+        return $credentials;
+    }
+
+    /**
+     * This method sends the needed HTTP header and status code (401) to force
+     * the user to login.
+     */
+    public function requireLogin()
+    {
+        $this->response->addHeader('WWW-Authenticate', 'Basic realm="'.$this->realm.'", charset="UTF-8"');
+        $this->response->setStatus(401);
+    }
+}

lib/vendor/sabre/http/lib/Auth/Bearer.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+/**
+ * HTTP Bearer authentication utility.
+ *
+ * This class helps you setup bearer auth. The process is fairly simple:
+ *
+ * 1. Instantiate the class.
+ * 2. Call getToken (this will return null or a token as string)
+ * 3. If you didn't get a valid token, call 'requireLogin'
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author François Kooman (fkooman@tuxed.net)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Bearer extends AbstractAuth
+{
+    /**
+     * This method returns a string with an access token.
+     *
+     * If no token was found, this method returns null.
+     *
+     * @return string|null
+     */
+    public function getToken()
+    {
+        $auth = $this->request->getHeader('Authorization');
+
+        if (!$auth) {
+            return null;
+        }
+
+        if ('bearer ' !== strtolower(substr($auth, 0, 7))) {
+            return null;
+        }
+
+        return substr($auth, 7);
+    }
+
+    /**
+     * This method sends the needed HTTP header and status code (401) to force
+     * authentication.
+     */
+    public function requireLogin()
+    {
+        $this->response->addHeader('WWW-Authenticate', 'Bearer realm="'.$this->realm.'"');
+        $this->response->setStatus(401);
+    }
+}

lib/vendor/sabre/http/lib/Auth/Digest.php

@@ -0,0 +1,208 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * HTTP Digest Authentication handler.
+ *
+ * Use this class for easy http digest authentication.
+ * Instructions:
+ *
+ *  1. Create the object
+ *  2. Call the setRealm() method with the realm you plan to use
+ *  3. Call the init method function.
+ *  4. Call the getUserName() function. This function may return null if no
+ *     authentication information was supplied. Based on the username you
+ *     should check your internal database for either the associated password,
+ *     or the so-called A1 hash of the digest.
+ *  5. Call either validatePassword() or validateA1(). This will return true
+ *     or false.
+ *  6. To make sure an authentication prompt is displayed, call the
+ *     requireLogin() method.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Digest extends AbstractAuth
+{
+    /**
+     * These constants are used in setQOP();.
+     */
+    public const QOP_AUTH = 1;
+    public const QOP_AUTHINT = 2;
+
+    protected $nonce;
+    protected $opaque;
+    protected $digestParts;
+    protected $A1;
+    protected $qop = self::QOP_AUTH;
+
+    /**
+     * Initializes the object.
+     */
+    public function __construct(string $realm, RequestInterface $request, ResponseInterface $response)
+    {
+        $this->nonce = uniqid();
+        $this->opaque = md5($realm);
+        parent::__construct($realm, $request, $response);
+    }
+
+    /**
+     * Gathers all information from the headers.
+     *
+     * This method needs to be called prior to anything else.
+     */
+    public function init()
+    {
+        $digest = $this->getDigest();
+        $this->digestParts = $this->parseDigest((string) $digest);
+    }
+
+    /**
+     * Sets the quality of protection value.
+     *
+     * Possible values are:
+     *   Sabre\HTTP\DigestAuth::QOP_AUTH
+     *   Sabre\HTTP\DigestAuth::QOP_AUTHINT
+     *
+     * Multiple values can be specified using logical OR.
+     *
+     * QOP_AUTHINT ensures integrity of the request body, but this is not
+     * supported by most HTTP clients. QOP_AUTHINT also requires the entire
+     * request body to be md5'ed, which can put strains on CPU and memory.
+     */
+    public function setQOP(int $qop)
+    {
+        $this->qop = $qop;
+    }
+
+    /**
+     * Validates the user.
+     *
+     * The A1 parameter should be md5($username . ':' . $realm . ':' . $password);
+     */
+    public function validateA1(string $A1): bool
+    {
+        $this->A1 = $A1;
+
+        return $this->validate();
+    }
+
+    /**
+     * Validates authentication through a password. The actual password must be provided here.
+     * It is strongly recommended not store the password in plain-text and use validateA1 instead.
+     */
+    public function validatePassword(string $password): bool
+    {
+        $this->A1 = md5($this->digestParts['username'].':'.$this->realm.':'.$password);
+
+        return $this->validate();
+    }
+
+    /**
+     * Returns the username for the request.
+     * Returns null if there were none.
+     *
+     * @return string|null
+     */
+    public function getUsername()
+    {
+        return $this->digestParts['username'] ?? null;
+    }
+
+    /**
+     * Validates the digest challenge.
+     */
+    protected function validate(): bool
+    {
+        if (!is_array($this->digestParts)) {
+            return false;
+        }
+
+        $A2 = $this->request->getMethod().':'.$this->digestParts['uri'];
+
+        if ('auth-int' === $this->digestParts['qop']) {
+            // Making sure we support this qop value
+            if (!($this->qop & self::QOP_AUTHINT)) {
+                return false;
+            }
+            // We need to add an md5 of the entire request body to the A2 part of the hash
+            $body = $this->request->getBody();
+            $this->request->setBody($body);
+            $A2 .= ':'.md5($body);
+        } elseif (!($this->qop & self::QOP_AUTH)) {
+            return false;
+        }
+
+        $A2 = md5($A2);
+
+        $validResponse = md5("{$this->A1}:{$this->digestParts['nonce']}:{$this->digestParts['nc']}:{$this->digestParts['cnonce']}:{$this->digestParts['qop']}:{$A2}");
+
+        return $this->digestParts['response'] === $validResponse;
+    }
+
+    /**
+     * Returns an HTTP 401 header, forcing login.
+     *
+     * This should be called when username and password are incorrect, or not supplied at all
+     */
+    public function requireLogin()
+    {
+        $qop = '';
+        switch ($this->qop) {
+            case self::QOP_AUTH:
+                $qop = 'auth';
+                break;
+            case self::QOP_AUTHINT:
+                $qop = 'auth-int';
+                break;
+            case self::QOP_AUTH | self::QOP_AUTHINT:
+                $qop = 'auth,auth-int';
+                break;
+        }
+
+        $this->response->addHeader('WWW-Authenticate', 'Digest realm="'.$this->realm.'",qop="'.$qop.'",nonce="'.$this->nonce.'",opaque="'.$this->opaque.'"');
+        $this->response->setStatus(401);
+    }
+
+    /**
+     * This method returns the full digest string.
+     *
+     * It should be compatible with mod_php format and other webservers.
+     *
+     * If the header could not be found, null will be returned
+     */
+    public function getDigest()
+    {
+        return $this->request->getHeader('Authorization');
+    }
+
+    /**
+     * Parses the different pieces of the digest string into an array.
+     *
+     * This method returns false if an incomplete digest was supplied
+     *
+     * @return bool|array
+     */
+    protected function parseDigest(string $digest)
+    {
+        // protect against missing data
+        $needed_parts = ['nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1];
+        $data = [];
+
+        preg_match_all('@(\w+)=(?:(?:")([^"]+)"|([^\s,$]+))@', $digest, $matches, PREG_SET_ORDER);
+
+        foreach ($matches as $m) {
+            $data[$m[1]] = $m[2] ?: $m[3];
+            unset($needed_parts[$m[1]]);
+        }
+
+        return $needed_parts ? false : $data;
+    }
+}

lib/vendor/sabre/http/lib/Client.php

@@ -0,0 +1,620 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+use Sabre\Event\EventEmitter;
+use Sabre\Uri;
+
+/**
+ * A rudimentary HTTP client.
+ *
+ * This object wraps PHP's curl extension and provides an easy way to send it a
+ * Request object, and return a Response object.
+ *
+ * This is by no means intended as the next best HTTP client, but it does the
+ * job and provides a simple integration with the rest of sabre/http.
+ *
+ * This client emits the following events:
+ *   beforeRequest(RequestInterface $request)
+ *   afterRequest(RequestInterface $request, ResponseInterface $response)
+ *   error(RequestInterface $request, ResponseInterface $response, bool &$retry, int $retryCount)
+ *   exception(RequestInterface $request, ClientException $e, bool &$retry, int $retryCount)
+ *
+ * The beforeRequest event allows you to do some last minute changes to the
+ * request before it's done, such as adding authentication headers.
+ *
+ * The afterRequest event will be emitted after the request is completed
+ * successfully.
+ *
+ * If a HTTP error is returned (status code higher than 399) the error event is
+ * triggered. It's possible using this event to retry the request, by setting
+ * retry to true.
+ *
+ * The amount of times a request has retried is passed as $retryCount, which
+ * can be used to avoid retrying indefinitely. The first time the event is
+ * called, this will be 0.
+ *
+ * It's also possible to intercept specific http errors, by subscribing to for
+ * example 'error:401'.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Client extends EventEmitter
+{
+    /**
+     * List of curl settings.
+     *
+     * @var array
+     */
+    protected $curlSettings = [];
+
+    /**
+     * Whether exceptions should be thrown when a HTTP error is returned.
+     *
+     * @var bool
+     */
+    protected $throwExceptions = false;
+
+    /**
+     * The maximum number of times we'll follow a redirect.
+     *
+     * @var int
+     */
+    protected $maxRedirects = 5;
+
+    protected $headerLinesMap = [];
+
+    /**
+     * Initializes the client.
+     */
+    public function __construct()
+    {
+        // See https://github.com/sabre-io/http/pull/115#discussion_r241292068
+        // Preserve compatibility for sub-classes that implements their own method `parseCurlResult`
+        $separatedHeaders = __CLASS__ === get_class($this);
+
+        $this->curlSettings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_NOBODY => false,
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+        if ($separatedHeaders) {
+            $this->curlSettings[CURLOPT_HEADERFUNCTION] = [$this, 'receiveCurlHeader'];
+        } else {
+            $this->curlSettings[CURLOPT_HEADER] = true;
+        }
+    }
+
+    protected function receiveCurlHeader($curlHandle, $headerLine)
+    {
+        $this->headerLinesMap[(int) $curlHandle][] = $headerLine;
+
+        return strlen($headerLine);
+    }
+
+    /**
+     * Sends a request to a HTTP server, and returns a response.
+     */
+    public function send(RequestInterface $request): ResponseInterface
+    {
+        $this->emit('beforeRequest', [$request]);
+
+        $retryCount = 0;
+        $redirects = 0;
+
+        do {
+            $doRedirect = false;
+            $retry = false;
+
+            try {
+                $response = $this->doRequest($request);
+
+                $code = $response->getStatus();
+
+                // We are doing in-PHP redirects, because curl's
+                // FOLLOW_LOCATION throws errors when PHP is configured with
+                // open_basedir.
+                //
+                // https://github.com/fruux/sabre-http/issues/12
+                if ($redirects < $this->maxRedirects && in_array($code, [301, 302, 307, 308])) {
+                    $oldLocation = $request->getUrl();
+
+                    // Creating a new instance of the request object.
+                    $request = clone $request;
+
+                    // Setting the new location
+                    $request->setUrl(Uri\resolve(
+                        $oldLocation,
+                        $response->getHeader('Location')
+                    ));
+
+                    $doRedirect = true;
+                    ++$redirects;
+                }
+
+                // This was a HTTP error
+                if ($code >= 400) {
+                    $this->emit('error', [$request, $response, &$retry, $retryCount]);
+                    $this->emit('error:'.$code, [$request, $response, &$retry, $retryCount]);
+                }
+            } catch (ClientException $e) {
+                $this->emit('exception', [$request, $e, &$retry, $retryCount]);
+
+                // If retry was still set to false, it means no event handler
+                // dealt with the problem. In this case we just re-throw the
+                // exception.
+                if (!$retry) {
+                    throw $e;
+                }
+            }
+
+            if ($retry) {
+                ++$retryCount;
+            }
+        } while ($retry || $doRedirect);
+
+        $this->emit('afterRequest', [$request, $response]);
+
+        if ($this->throwExceptions && $code >= 400) {
+            throw new ClientHttpException($response);
+        }
+
+        return $response;
+    }
+
+    /**
+     * Sends a HTTP request asynchronously.
+     *
+     * Due to the nature of PHP, you must from time to time poll to see if any
+     * new responses came in.
+     *
+     * After calling sendAsync, you must therefore occasionally call the poll()
+     * method, or wait().
+     */
+    public function sendAsync(RequestInterface $request, ?callable $success = null, ?callable $error = null)
+    {
+        $this->emit('beforeRequest', [$request]);
+        $this->sendAsyncInternal($request, $success, $error);
+        $this->poll();
+    }
+
+    /**
+     * This method checks if any http requests have gotten results, and if so,
+     * call the appropriate success or error handlers.
+     *
+     * This method will return true if there are still requests waiting to
+     * return, and false if all the work is done.
+     */
+    public function poll(): bool
+    {
+        // nothing to do?
+        if (!$this->curlMultiMap) {
+            return false;
+        }
+
+        do {
+            $r = curl_multi_exec(
+                $this->curlMultiHandle,
+                $stillRunning
+            );
+        } while (CURLM_CALL_MULTI_PERFORM === $r);
+
+        $messagesInQueue = 0;
+        do {
+            messageQueue:
+
+            $status = curl_multi_info_read(
+                $this->curlMultiHandle,
+                $messagesInQueue
+            );
+
+            if ($status && CURLMSG_DONE === $status['msg']) {
+                $resourceId = (int) $status['handle'];
+                list(
+                    $request,
+                    $successCallback,
+                    $errorCallback,
+                    $retryCount) = $this->curlMultiMap[$resourceId];
+                unset($this->curlMultiMap[$resourceId]);
+
+                $curlHandle = $status['handle'];
+                $curlResult = $this->parseResponse(curl_multi_getcontent($curlHandle), $curlHandle);
+                $retry = false;
+
+                if (self::STATUS_CURLERROR === $curlResult['status']) {
+                    $e = new ClientException($curlResult['curl_errmsg'], $curlResult['curl_errno']);
+                    $this->emit('exception', [$request, $e, &$retry, $retryCount]);
+
+                    if ($retry) {
+                        ++$retryCount;
+                        $this->sendAsyncInternal($request, $successCallback, $errorCallback, $retryCount);
+                        goto messageQueue;
+                    }
+
+                    $curlResult['request'] = $request;
+
+                    if ($errorCallback) {
+                        $errorCallback($curlResult);
+                    }
+                } elseif (self::STATUS_HTTPERROR === $curlResult['status']) {
+                    $this->emit('error', [$request, $curlResult['response'], &$retry, $retryCount]);
+                    $this->emit('error:'.$curlResult['http_code'], [$request, $curlResult['response'], &$retry, $retryCount]);
+
+                    if ($retry) {
+                        ++$retryCount;
+                        $this->sendAsyncInternal($request, $successCallback, $errorCallback, $retryCount);
+                        goto messageQueue;
+                    }
+
+                    $curlResult['request'] = $request;
+
+                    if ($errorCallback) {
+                        $errorCallback($curlResult);
+                    }
+                } else {
+                    $this->emit('afterRequest', [$request, $curlResult['response']]);
+
+                    if ($successCallback) {
+                        $successCallback($curlResult['response']);
+                    }
+                }
+            }
+        } while ($messagesInQueue > 0);
+
+        return count($this->curlMultiMap) > 0;
+    }
+
+    /**
+     * Processes every HTTP request in the queue, and waits till they are all
+     * completed.
+     */
+    public function wait()
+    {
+        do {
+            curl_multi_select($this->curlMultiHandle);
+            $stillRunning = $this->poll();
+        } while ($stillRunning);
+    }
+
+    /**
+     * If this is set to true, the Client will automatically throw exceptions
+     * upon HTTP errors.
+     *
+     * This means that if a response came back with a status code greater than
+     * or equal to 400, we will throw a ClientHttpException.
+     *
+     * This only works for the send() method. Throwing exceptions for
+     * sendAsync() is not supported.
+     */
+    public function setThrowExceptions(bool $throwExceptions)
+    {
+        $this->throwExceptions = $throwExceptions;
+    }
+
+    /**
+     * Adds a CURL setting.
+     *
+     * These settings will be included in every HTTP request.
+     */
+    public function addCurlSetting(int $name, $value)
+    {
+        $this->curlSettings[$name] = $value;
+    }
+
+    /**
+     * This method is responsible for performing a single request.
+     */
+    protected function doRequest(RequestInterface $request): ResponseInterface
+    {
+        $settings = $this->createCurlSettingsArray($request);
+
+        if (!$this->curlHandle) {
+            $this->curlHandle = curl_init();
+        } else {
+            curl_reset($this->curlHandle);
+        }
+
+        curl_setopt_array($this->curlHandle, $settings);
+        $response = $this->curlExec($this->curlHandle);
+        $response = $this->parseResponse($response, $this->curlHandle);
+        if (self::STATUS_CURLERROR === $response['status']) {
+            throw new ClientException($response['curl_errmsg'], $response['curl_errno']);
+        }
+
+        return $response['response'];
+    }
+
+    /**
+     * Cached curl handle.
+     *
+     * By keeping this resource around for the lifetime of this object, things
+     * like persistent connections are possible.
+     *
+     * @var resource
+     */
+    private $curlHandle;
+
+    /**
+     * Handler for curl_multi requests.
+     *
+     * The first time sendAsync is used, this will be created.
+     *
+     * @var resource
+     */
+    private $curlMultiHandle;
+
+    /**
+     * Has a list of curl handles, as well as their associated success and
+     * error callbacks.
+     *
+     * @var array
+     */
+    private $curlMultiMap = [];
+
+    /**
+     * Turns a RequestInterface object into an array with settings that can be
+     * fed to curl_setopt.
+     */
+    protected function createCurlSettingsArray(RequestInterface $request): array
+    {
+        $settings = $this->curlSettings;
+
+        switch ($request->getMethod()) {
+            case 'HEAD':
+                $settings[CURLOPT_NOBODY] = true;
+                $settings[CURLOPT_CUSTOMREQUEST] = 'HEAD';
+                break;
+            case 'GET':
+                $settings[CURLOPT_CUSTOMREQUEST] = 'GET';
+                break;
+            default:
+                $body = $request->getBody();
+                if (is_resource($body)) {
+                    $bodyStat = fstat($body);
+
+                    // This needs to be set to PUT, regardless of the actual
+                    // method used. Without it, INFILE will be ignored for some
+                    // reason.
+                    $settings[CURLOPT_PUT] = true;
+                    $settings[CURLOPT_INFILE] = $body;
+                    if (false !== $bodyStat && array_key_exists('size', $bodyStat)) {
+                        $settings[CURLOPT_INFILESIZE] = $bodyStat['size'];
+                    }
+                } else {
+                    // For security we cast this to a string. If somehow an array could
+                    // be passed here, it would be possible for an attacker to use @ to
+                    // post local files.
+                    $settings[CURLOPT_POSTFIELDS] = (string) $body;
+                }
+                $settings[CURLOPT_CUSTOMREQUEST] = $request->getMethod();
+                break;
+        }
+
+        $nHeaders = [];
+        foreach ($request->getHeaders() as $key => $values) {
+            foreach ($values as $value) {
+                $nHeaders[] = $key.': '.$value;
+            }
+        }
+
+        if ([] !== $nHeaders) {
+            $settings[CURLOPT_HTTPHEADER] = $nHeaders;
+        }
+        $settings[CURLOPT_URL] = $request->getUrl();
+        // FIXME: CURLOPT_PROTOCOLS is currently unsupported by HHVM
+        if (defined('CURLOPT_PROTOCOLS')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+        // FIXME: CURLOPT_REDIR_PROTOCOLS is currently unsupported by HHVM
+        if (defined('CURLOPT_REDIR_PROTOCOLS')) {
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        return $settings;
+    }
+
+    public const STATUS_SUCCESS = 0;
+    public const STATUS_CURLERROR = 1;
+    public const STATUS_HTTPERROR = 2;
+
+    private function parseResponse(string $response, $curlHandle): array
+    {
+        $settings = $this->curlSettings;
+        $separatedHeaders = isset($settings[CURLOPT_HEADERFUNCTION]) && (bool) $settings[CURLOPT_HEADERFUNCTION];
+
+        if ($separatedHeaders) {
+            $resourceId = (int) $curlHandle;
+            if (isset($this->headerLinesMap[$resourceId])) {
+                $headers = $this->headerLinesMap[$resourceId];
+            } else {
+                $headers = [];
+            }
+            $response = $this->parseCurlResponse($headers, $response, $curlHandle);
+        } else {
+            $response = $this->parseCurlResult($response, $curlHandle);
+        }
+
+        return $response;
+    }
+
+    /**
+     * Parses the result of a curl call in a format that's a bit more
+     * convenient to work with.
+     *
+     * The method returns an array with the following elements:
+     *   * status - one of the 3 STATUS constants.
+     *   * curl_errno - A curl error number. Only set if status is
+     *                  STATUS_CURLERROR.
+     *   * curl_errmsg - A current error message. Only set if status is
+     *                   STATUS_CURLERROR.
+     *   * response - Response object. Only set if status is STATUS_SUCCESS, or
+     *                STATUS_HTTPERROR.
+     *   * http_code - HTTP status code, as an int. Only set if Only set if
+     *                 status is STATUS_SUCCESS, or STATUS_HTTPERROR
+     *
+     * @param resource $curlHandle
+     */
+    protected function parseCurlResponse(array $headerLines, string $body, $curlHandle): array
+    {
+        list(
+            $curlInfo,
+            $curlErrNo,
+            $curlErrMsg
+        ) = $this->curlStuff($curlHandle);
+
+        if ($curlErrNo) {
+            return [
+                'status' => self::STATUS_CURLERROR,
+                'curl_errno' => $curlErrNo,
+                'curl_errmsg' => $curlErrMsg,
+            ];
+        }
+
+        $response = new Response();
+        $response->setStatus($curlInfo['http_code']);
+        $response->setBody($body);
+
+        foreach ($headerLines as $header) {
+            $parts = explode(':', $header, 2);
+            if (2 === count($parts)) {
+                $response->addHeader(trim($parts[0]), trim($parts[1]));
+            }
+        }
+
+        $httpCode = $response->getStatus();
+
+        return [
+            'status' => $httpCode >= 400 ? self::STATUS_HTTPERROR : self::STATUS_SUCCESS,
+            'response' => $response,
+            'http_code' => $httpCode,
+        ];
+    }
+
+    /**
+     * Parses the result of a curl call in a format that's a bit more
+     * convenient to work with.
+     *
+     * The method returns an array with the following elements:
+     *   * status - one of the 3 STATUS constants.
+     *   * curl_errno - A curl error number. Only set if status is
+     *                  STATUS_CURLERROR.
+     *   * curl_errmsg - A current error message. Only set if status is
+     *                   STATUS_CURLERROR.
+     *   * response - Response object. Only set if status is STATUS_SUCCESS, or
+     *                STATUS_HTTPERROR.
+     *   * http_code - HTTP status code, as an int. Only set if Only set if
+     *                 status is STATUS_SUCCESS, or STATUS_HTTPERROR
+     *
+     * @deprecated Use parseCurlResponse instead
+     *
+     * @param resource $curlHandle
+     */
+    protected function parseCurlResult(string $response, $curlHandle): array
+    {
+        list(
+            $curlInfo,
+            $curlErrNo,
+            $curlErrMsg
+        ) = $this->curlStuff($curlHandle);
+
+        if ($curlErrNo) {
+            return [
+                'status' => self::STATUS_CURLERROR,
+                'curl_errno' => $curlErrNo,
+                'curl_errmsg' => $curlErrMsg,
+            ];
+        }
+
+        $headerBlob = substr($response, 0, $curlInfo['header_size']);
+        // In the case of 204 No Content, strlen($response) == $curlInfo['header_size].
+        // This will cause substr($response, $curlInfo['header_size']) return FALSE instead of NULL
+        // An exception will be thrown when calling getBodyAsString then
+        $responseBody = substr($response, $curlInfo['header_size']) ?: '';
+
+        unset($response);
+
+        // In the case of 100 Continue, or redirects we'll have multiple lists
+        // of headers for each separate HTTP response. We can easily split this
+        // because they are separated by \r\n\r\n
+        $headerBlob = explode("\r\n\r\n", trim($headerBlob, "\r\n"));
+
+        // We only care about the last set of headers
+        $headerBlob = $headerBlob[count($headerBlob) - 1];
+
+        // Splitting headers
+        $headerBlob = explode("\r\n", $headerBlob);
+
+        return $this->parseCurlResponse($headerBlob, $responseBody, $curlHandle);
+    }
+
+    /**
+     * Sends an asynchronous HTTP request.
+     *
+     * We keep this in a separate method, so we can call it without triggering
+     * the beforeRequest event and don't do the poll().
+     */
+    protected function sendAsyncInternal(RequestInterface $request, callable $success, callable $error, int $retryCount = 0)
+    {
+        if (!$this->curlMultiHandle) {
+            $this->curlMultiHandle = curl_multi_init();
+        }
+        $curl = curl_init();
+        curl_setopt_array(
+            $curl,
+            $this->createCurlSettingsArray($request)
+        );
+        curl_multi_add_handle($this->curlMultiHandle, $curl);
+
+        $resourceId = (int) $curl;
+        $this->headerLinesMap[$resourceId] = [];
+        $this->curlMultiMap[$resourceId] = [
+            $request,
+            $success,
+            $error,
+            $retryCount,
+        ];
+    }
+
+    // @codeCoverageIgnoreStart
+
+    /**
+     * Calls curl_exec.
+     *
+     * This method exists so it can easily be overridden and mocked.
+     *
+     * @param resource $curlHandle
+     */
+    protected function curlExec($curlHandle): string
+    {
+        $this->headerLinesMap[(int) $curlHandle] = [];
+
+        $result = curl_exec($curlHandle);
+        if (false === $result) {
+            $result = '';
+        }
+
+        return $result;
+    }
+
+    /**
+     * Returns a bunch of information about a curl request.
+     *
+     * This method exists so it can easily be overridden and mocked.
+     *
+     * @param resource $curlHandle
+     */
+    protected function curlStuff($curlHandle): array
+    {
+        return [
+            curl_getinfo($curlHandle),
+            curl_errno($curlHandle),
+            curl_error($curlHandle),
+        ];
+    }
+
+    // @codeCoverageIgnoreEnd
+}

lib/vendor/sabre/http/lib/ClientException.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This exception may be emitted by the HTTP\Client class, in case there was a
+ * problem emitting the request.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ClientException extends \Exception
+{
+}

lib/vendor/sabre/http/lib/ClientHttpException.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This exception represents a HTTP error coming from the Client.
+ *
+ * By default the Client will not emit these, this has to be explicitly enabled
+ * with the setThrowExceptions method.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ClientHttpException extends \Exception implements HttpException
+{
+    /**
+     * Response object.
+     *
+     * @var ResponseInterface
+     */
+    protected $response;
+
+    /**
+     * Constructor.
+     */
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+        parent::__construct($response->getStatusText(), $response->getStatus());
+    }
+
+    /**
+     * The http status code for the error.
+     */
+    public function getHttpStatus(): int
+    {
+        return $this->response->getStatus();
+    }
+
+    /**
+     * Returns the full response object.
+     */
+    public function getResponse(): ResponseInterface
+    {
+        return $this->response;
+    }
+}

lib/vendor/sabre/http/lib/HttpException.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * An exception representing a HTTP error.
+ *
+ * This can be used as a generic exception in your application, if you'd like
+ * to map HTTP errors to exceptions.
+ *
+ * If you'd like to use this, create a new exception class, extending Exception
+ * and implementing this interface.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface HttpException
+{
+    /**
+     * The http status code for the error.
+     *
+     * This may either be just the number, or a number and a human-readable
+     * message, separated by a space.
+     *
+     * @return string|null
+     */
+    public function getHttpStatus();
+}

lib/vendor/sabre/http/lib/Message.php

@@ -0,0 +1,291 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This is the abstract base class for both the Request and Response objects.
+ *
+ * This object contains a few simple methods that are shared by both.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class Message implements MessageInterface
+{
+    /**
+     * Request body.
+     *
+     * This should be a stream resource, string or a callback writing the body to php://output
+     *
+     * @var resource|string|callable
+     */
+    protected $body;
+
+    /**
+     * Contains the list of HTTP headers.
+     *
+     * @var array
+     */
+    protected $headers = [];
+
+    /**
+     * HTTP message version (1.0, 1.1 or 2.0).
+     *
+     * @var string
+     */
+    protected $httpVersion = '1.1';
+
+    /**
+     * Returns the body as a readable stream resource.
+     *
+     * Note that the stream may not be rewindable, and therefore may only be
+     * read once.
+     *
+     * @return resource
+     */
+    public function getBodyAsStream()
+    {
+        $body = $this->getBody();
+        if (is_callable($this->body)) {
+            $body = $this->getBodyAsString();
+        }
+        if (is_string($body) || null === $body) {
+            $stream = fopen('php://temp', 'r+');
+            fwrite($stream, (string) $body);
+            rewind($stream);
+
+            return $stream;
+        }
+
+        return $body;
+    }
+
+    /**
+     * Returns the body as a string.
+     *
+     * Note that because the underlying data may be based on a stream, this
+     * method could only work correctly the first time.
+     */
+    public function getBodyAsString(): string
+    {
+        $body = $this->getBody();
+        if (is_string($body)) {
+            return $body;
+        }
+        if (null === $body) {
+            return '';
+        }
+        if (is_callable($body)) {
+            ob_start();
+            $body();
+
+            return ob_get_clean();
+        }
+        /**
+         * @var string|int|null
+         */
+        $contentLength = $this->getHeader('Content-Length');
+        if (null !== $contentLength && (is_int($contentLength) || ctype_digit($contentLength))) {
+            return stream_get_contents($body, (int) $contentLength);
+        }
+
+        return stream_get_contents($body);
+    }
+
+    /**
+     * Returns the message body, as its internal representation.
+     *
+     * This could be either a string, a stream or a callback writing the body to php://output.
+     *
+     * @return resource|string|callable
+     */
+    public function getBody()
+    {
+        return $this->body;
+    }
+
+    /**
+     * Replaces the body resource with a new stream, string or a callback writing the body to php://output.
+     *
+     * @param resource|string|callable $body
+     */
+    public function setBody($body)
+    {
+        $this->body = $body;
+    }
+
+    /**
+     * Returns all the HTTP headers as an array.
+     *
+     * Every header is returned as an array, with one or more values.
+     */
+    public function getHeaders(): array
+    {
+        $result = [];
+        foreach ($this->headers as $headerInfo) {
+            $result[$headerInfo[0]] = $headerInfo[1];
+        }
+
+        return $result;
+    }
+
+    /**
+     * Will return true or false, depending on if a HTTP header exists.
+     */
+    public function hasHeader(string $name): bool
+    {
+        return isset($this->headers[strtolower($name)]);
+    }
+
+    /**
+     * Returns a specific HTTP header, based on its name.
+     *
+     * The name must be treated as case-insensitive.
+     * If the header does not exist, this method must return null.
+     *
+     * If a header appeared more than once in a HTTP request, this method will
+     * concatenate all the values with a comma.
+     *
+     * Note that this not make sense for all headers. Some, such as
+     * `Set-Cookie` cannot be logically combined with a comma. In those cases
+     * you *should* use getHeaderAsArray().
+     *
+     * @return string|null
+     */
+    public function getHeader(string $name)
+    {
+        $name = strtolower($name);
+
+        if (isset($this->headers[$name])) {
+            return implode(',', $this->headers[$name][1]);
+        }
+
+        return null;
+    }
+
+    /**
+     * Returns a HTTP header as an array.
+     *
+     * For every time the HTTP header appeared in the request or response, an
+     * item will appear in the array.
+     *
+     * If the header did not exist, this method will return an empty array.
+     *
+     * @return string[]
+     */
+    public function getHeaderAsArray(string $name): array
+    {
+        $name = strtolower($name);
+
+        if (isset($this->headers[$name])) {
+            return $this->headers[$name][1];
+        }
+
+        return [];
+    }
+
+    /**
+     * Updates a HTTP header.
+     *
+     * The case-sensitivity of the name value must be retained as-is.
+     *
+     * If the header already existed, it will be overwritten.
+     *
+     * @param string|string[] $value
+     */
+    public function setHeader(string $name, $value)
+    {
+        $this->headers[strtolower($name)] = [$name, (array) $value];
+    }
+
+    /**
+     * Sets a new set of HTTP headers.
+     *
+     * The headers array should contain headernames for keys, and their value
+     * should be specified as either a string or an array.
+     *
+     * Any header that already existed will be overwritten.
+     */
+    public function setHeaders(array $headers)
+    {
+        foreach ($headers as $name => $value) {
+            $this->setHeader($name, $value);
+        }
+    }
+
+    /**
+     * Adds a HTTP header.
+     *
+     * This method will not overwrite any existing HTTP header, but instead add
+     * another value. Individual values can be retrieved with
+     * getHeadersAsArray.
+     *
+     * @param string|string[] $value
+     */
+    public function addHeader(string $name, $value)
+    {
+        $lName = strtolower($name);
+        if (isset($this->headers[$lName])) {
+            $this->headers[$lName][1] = array_merge(
+                $this->headers[$lName][1],
+                (array) $value
+            );
+        } else {
+            $this->headers[$lName] = [
+                $name,
+                (array) $value,
+            ];
+        }
+    }
+
+    /**
+     * Adds a new set of HTTP headers.
+     *
+     * Any existing headers will not be overwritten.
+     */
+    public function addHeaders(array $headers)
+    {
+        foreach ($headers as $name => $value) {
+            $this->addHeader($name, $value);
+        }
+    }
+
+    /**
+     * Removes a HTTP header.
+     *
+     * The specified header name must be treated as case-insensitive.
+     * This method should return true if the header was successfully deleted,
+     * and false if the header did not exist.
+     */
+    public function removeHeader(string $name): bool
+    {
+        $name = strtolower($name);
+        if (!isset($this->headers[$name])) {
+            return false;
+        }
+        unset($this->headers[$name]);
+
+        return true;
+    }
+
+    /**
+     * Sets the HTTP version.
+     *
+     * Should be 1.0, 1.1 or 2.0.
+     */
+    public function setHttpVersion(string $version)
+    {
+        $this->httpVersion = $version;
+    }
+
+    /**
+     * Returns the HTTP version.
+     */
+    public function getHttpVersion(): string
+    {
+        return $this->httpVersion;
+    }
+}

lib/vendor/sabre/http/lib/MessageDecoratorTrait.php

@@ -0,0 +1,206 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This trait contains a bunch of methods, shared by both the RequestDecorator
+ * and the ResponseDecorator.
+ *
+ * Didn't seem needed to create a full class for this, so we're just
+ * implementing it as a trait.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+trait MessageDecoratorTrait
+{
+    /**
+     * The inner request object.
+     *
+     * All method calls will be forwarded here.
+     *
+     * @var MessageInterface
+     */
+    protected $inner;
+
+    /**
+     * Returns the body as a readable stream resource.
+     *
+     * Note that the stream may not be rewindable, and therefore may only be
+     * read once.
+     *
+     * @return resource
+     */
+    public function getBodyAsStream()
+    {
+        return $this->inner->getBodyAsStream();
+    }
+
+    /**
+     * Returns the body as a string.
+     *
+     * Note that because the underlying data may be based on a stream, this
+     * method could only work correctly the first time.
+     */
+    public function getBodyAsString(): string
+    {
+        return $this->inner->getBodyAsString();
+    }
+
+    /**
+     * Returns the message body, as its internal representation.
+     *
+     * This could be either a string or a stream.
+     *
+     * @return resource|string
+     */
+    public function getBody()
+    {
+        return $this->inner->getBody();
+    }
+
+    /**
+     * Updates the body resource with a new stream.
+     *
+     * @param resource|string|callable $body
+     */
+    public function setBody($body)
+    {
+        $this->inner->setBody($body);
+    }
+
+    /**
+     * Returns all the HTTP headers as an array.
+     *
+     * Every header is returned as an array, with one or more values.
+     */
+    public function getHeaders(): array
+    {
+        return $this->inner->getHeaders();
+    }
+
+    /**
+     * Will return true or false, depending on if a HTTP header exists.
+     */
+    public function hasHeader(string $name): bool
+    {
+        return $this->inner->hasHeader($name);
+    }
+
+    /**
+     * Returns a specific HTTP header, based on its name.
+     *
+     * The name must be treated as case-insensitive.
+     * If the header does not exist, this method must return null.
+     *
+     * If a header appeared more than once in a HTTP request, this method will
+     * concatenate all the values with a comma.
+     *
+     * Note that this not make sense for all headers. Some, such as
+     * `Set-Cookie` cannot be logically combined with a comma. In those cases
+     * you *should* use getHeaderAsArray().
+     *
+     * @return string|null
+     */
+    public function getHeader(string $name)
+    {
+        return $this->inner->getHeader($name);
+    }
+
+    /**
+     * Returns a HTTP header as an array.
+     *
+     * For every time the HTTP header appeared in the request or response, an
+     * item will appear in the array.
+     *
+     * If the header did not exist, this method will return an empty array.
+     */
+    public function getHeaderAsArray(string $name): array
+    {
+        return $this->inner->getHeaderAsArray($name);
+    }
+
+    /**
+     * Updates a HTTP header.
+     *
+     * The case-sensitivity of the name value must be retained as-is.
+     *
+     * If the header already existed, it will be overwritten.
+     *
+     * @param string|string[] $value
+     */
+    public function setHeader(string $name, $value)
+    {
+        $this->inner->setHeader($name, $value);
+    }
+
+    /**
+     * Sets a new set of HTTP headers.
+     *
+     * The headers array should contain headernames for keys, and their value
+     * should be specified as either a string or an array.
+     *
+     * Any header that already existed will be overwritten.
+     */
+    public function setHeaders(array $headers)
+    {
+        $this->inner->setHeaders($headers);
+    }
+
+    /**
+     * Adds a HTTP header.
+     *
+     * This method will not overwrite any existing HTTP header, but instead add
+     * another value. Individual values can be retrieved with
+     * getHeadersAsArray.
+     *
+     * @param string|string[] $value
+     */
+    public function addHeader(string $name, $value)
+    {
+        $this->inner->addHeader($name, $value);
+    }
+
+    /**
+     * Adds a new set of HTTP headers.
+     *
+     * Any existing headers will not be overwritten.
+     */
+    public function addHeaders(array $headers)
+    {
+        $this->inner->addHeaders($headers);
+    }
+
+    /**
+     * Removes a HTTP header.
+     *
+     * The specified header name must be treated as case-insensitive.
+     * This method should return true if the header was successfully deleted,
+     * and false if the header did not exist.
+     */
+    public function removeHeader(string $name): bool
+    {
+        return $this->inner->removeHeader($name);
+    }
+
+    /**
+     * Sets the HTTP version.
+     *
+     * Should be 1.0, 1.1 or 2.0.
+     */
+    public function setHttpVersion(string $version)
+    {
+        $this->inner->setHttpVersion($version);
+    }
+
+    /**
+     * Returns the HTTP version.
+     */
+    public function getHttpVersion(): string
+    {
+        return $this->inner->getHttpVersion();
+    }
+}

lib/vendor/sabre/http/lib/MessageInterface.php

@@ -0,0 +1,151 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * The MessageInterface is the base interface that's used by both
+ * the RequestInterface and ResponseInterface.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface MessageInterface
+{
+    /**
+     * Returns the body as a readable stream resource.
+     *
+     * Note that the stream may not be rewindable, and therefore may only be
+     * read once.
+     *
+     * @return resource
+     */
+    public function getBodyAsStream();
+
+    /**
+     * Returns the body as a string.
+     *
+     * Note that because the underlying data may be based on a stream, this
+     * method could only work correctly the first time.
+     */
+    public function getBodyAsString(): string;
+
+    /**
+     * Returns the message body, as its internal representation.
+     *
+     * This could be either a string, a stream or a callback writing the body to php://output
+     *
+     * @return resource|string|callable
+     */
+    public function getBody();
+
+    /**
+     * Updates the body resource with a new stream.
+     *
+     * @param resource|string|callable $body
+     */
+    public function setBody($body);
+
+    /**
+     * Returns all the HTTP headers as an array.
+     *
+     * Every header is returned as an array, with one or more values.
+     */
+    public function getHeaders(): array;
+
+    /**
+     * Will return true or false, depending on if a HTTP header exists.
+     */
+    public function hasHeader(string $name): bool;
+
+    /**
+     * Returns a specific HTTP header, based on its name.
+     *
+     * The name must be treated as case-insensitive.
+     * If the header does not exist, this method must return null.
+     *
+     * If a header appeared more than once in a HTTP request, this method will
+     * concatenate all the values with a comma.
+     *
+     * Note that this not make sense for all headers. Some, such as
+     * `Set-Cookie` cannot be logically combined with a comma. In those cases
+     * you *should* use getHeaderAsArray().
+     *
+     * @return string|null
+     */
+    public function getHeader(string $name);
+
+    /**
+     * Returns a HTTP header as an array.
+     *
+     * For every time the HTTP header appeared in the request or response, an
+     * item will appear in the array.
+     *
+     * If the header did not exist, this method will return an empty array.
+     *
+     * @return string[]
+     */
+    public function getHeaderAsArray(string $name): array;
+
+    /**
+     * Updates a HTTP header.
+     *
+     * The case-sensitivity of the name value must be retained as-is.
+     *
+     * If the header already existed, it will be overwritten.
+     *
+     * @param string|string[] $value
+     */
+    public function setHeader(string $name, $value);
+
+    /**
+     * Sets a new set of HTTP headers.
+     *
+     * The headers array should contain headernames for keys, and their value
+     * should be specified as either a string or an array.
+     *
+     * Any header that already existed will be overwritten.
+     */
+    public function setHeaders(array $headers);
+
+    /**
+     * Adds a HTTP header.
+     *
+     * This method will not overwrite any existing HTTP header, but instead add
+     * another value. Individual values can be retrieved with
+     * getHeadersAsArray.
+     *
+     * @param string|string[] $value
+     */
+    public function addHeader(string $name, $value);
+
+    /**
+     * Adds a new set of HTTP headers.
+     *
+     * Any existing headers will not be overwritten.
+     */
+    public function addHeaders(array $headers);
+
+    /**
+     * Removes a HTTP header.
+     *
+     * The specified header name must be treated as case-insensitive.
+     * This method should return true if the header was successfully deleted,
+     * and false if the header did not exist.
+     */
+    public function removeHeader(string $name): bool;
+
+    /**
+     * Sets the HTTP version.
+     *
+     * Should be 1.0, 1.1 or 2.0.
+     */
+    public function setHttpVersion(string $version);
+
+    /**
+     * Returns the HTTP version.
+     */
+    public function getHttpVersion(): string;
+}

lib/vendor/sabre/http/lib/Request.php

@@ -0,0 +1,273 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+use Sabre\Uri;
+
+/**
+ * The Request class represents a single HTTP request.
+ *
+ * You can either simply construct the object from scratch, or if you need
+ * access to the current HTTP request, use Sapi::getRequest.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Request extends Message implements RequestInterface
+{
+    /**
+     * HTTP Method.
+     *
+     * @var string
+     */
+    protected $method;
+
+    /**
+     * Request Url.
+     *
+     * @var string
+     */
+    protected $url;
+
+    /**
+     * Creates the request object.
+     *
+     * @param resource|callable|string $body
+     */
+    public function __construct(string $method, string $url, array $headers = [], $body = null)
+    {
+        $this->setMethod($method);
+        $this->setUrl($url);
+        $this->setHeaders($headers);
+        $this->setBody($body);
+    }
+
+    /**
+     * Returns the current HTTP method.
+     */
+    public function getMethod(): string
+    {
+        return $this->method;
+    }
+
+    /**
+     * Sets the HTTP method.
+     */
+    public function setMethod(string $method)
+    {
+        $this->method = $method;
+    }
+
+    /**
+     * Returns the request url.
+     */
+    public function getUrl(): string
+    {
+        return $this->url;
+    }
+
+    /**
+     * Sets the request url.
+     */
+    public function setUrl(string $url)
+    {
+        $this->url = $url;
+    }
+
+    /**
+     * Returns the list of query parameters.
+     *
+     * This is equivalent to PHP's $_GET superglobal.
+     */
+    public function getQueryParameters(): array
+    {
+        $url = $this->getUrl();
+        if (false === ($index = strpos($url, '?'))) {
+            return [];
+        }
+
+        parse_str(substr($url, $index + 1), $queryParams);
+
+        return $queryParams;
+    }
+
+    protected $absoluteUrl;
+
+    /**
+     * Sets the absolute url.
+     */
+    public function setAbsoluteUrl(string $url)
+    {
+        $this->absoluteUrl = $url;
+    }
+
+    /**
+     * Returns the absolute url.
+     */
+    public function getAbsoluteUrl(): string
+    {
+        if (!$this->absoluteUrl) {
+            $url = $this->getUrl();
+            if (parse_url($url, PHP_URL_SCHEME)) {
+                // It's already an absolute URL
+                $this->absoluteUrl = $url;
+            } else {
+                $host = $this->getHeader('Host')
+                    ?? parse_url($url, PHP_URL_HOST)
+                    ?? 'localhost';
+                // Guessing we're a http endpoint.
+                $this->absoluteUrl = "http://$host$url";
+            }
+        }
+
+        return $this->absoluteUrl;
+    }
+
+    /**
+     * Base url.
+     *
+     * @var string
+     */
+    protected $baseUrl = '/';
+
+    /**
+     * Sets a base url.
+     *
+     * This url is used for relative path calculations.
+     */
+    public function setBaseUrl(string $url)
+    {
+        $this->baseUrl = $url;
+    }
+
+    /**
+     * Returns the current base url.
+     */
+    public function getBaseUrl(): string
+    {
+        return $this->baseUrl;
+    }
+
+    /**
+     * Returns the relative path.
+     *
+     * This is being calculated using the base url. This path will not start
+     * with a slash, so it will always return something like
+     * 'example/path.html'.
+     *
+     * If the full path is equal to the base url, this method will return an
+     * empty string.
+     *
+     * This method will also urldecode the path, and if the url was encoded as
+     * ISO-8859-1, it will convert it to UTF-8.
+     *
+     * If the path is outside of the base url, a LogicException will be thrown.
+     */
+    public function getPath(): string
+    {
+        // Removing duplicated slashes.
+        $uri = str_replace('//', '/', $this->getUrl());
+
+        $uri = Uri\normalize($uri);
+        $baseUri = Uri\normalize($this->getBaseUrl());
+
+        if (0 === strpos($uri, $baseUri)) {
+            // We're not interested in the query part (everything after the ?).
+            list($uri) = explode('?', $uri);
+
+            return trim(decodePath(substr($uri, strlen($baseUri))), '/');
+        }
+
+        if ($uri.'/' === $baseUri) {
+            return '';
+        }
+        // A special case, if the baseUri was accessed without a trailing
+        // slash, we'll accept it as well.
+
+        throw new \LogicException('Requested uri ('.$this->getUrl().') is out of base uri ('.$this->getBaseUrl().')');
+    }
+
+    /**
+     * Equivalent of PHP's $_POST.
+     *
+     * @var array
+     */
+    protected $postData = [];
+
+    /**
+     * Sets the post data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     *
+     * This would not have been needed, if POST data was accessible as
+     * php://input, but unfortunately we need to special case it.
+     */
+    public function setPostData(array $postData)
+    {
+        $this->postData = $postData;
+    }
+
+    /**
+     * Returns the POST data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     */
+    public function getPostData(): array
+    {
+        return $this->postData;
+    }
+
+    /**
+     * An array containing the raw _SERVER array.
+     *
+     * @var array
+     */
+    protected $rawServerData;
+
+    /**
+     * Returns an item from the _SERVER array.
+     *
+     * If the value does not exist in the array, null is returned.
+     *
+     * @return string|null
+     */
+    public function getRawServerValue(string $valueName)
+    {
+        return $this->rawServerData[$valueName] ?? null;
+    }
+
+    /**
+     * Sets the _SERVER array.
+     */
+    public function setRawServerData(array $data)
+    {
+        $this->rawServerData = $data;
+    }
+
+    /**
+     * Serializes the request object as a string.
+     *
+     * This is useful for debugging purposes.
+     */
+    public function __toString(): string
+    {
+        $out = $this->getMethod().' '.$this->getUrl().' HTTP/'.$this->getHttpVersion()."\r\n";
+
+        foreach ($this->getHeaders() as $key => $value) {
+            foreach ($value as $v) {
+                if ('Authorization' === $key) {
+                    list($v) = explode(' ', $v, 2);
+                    $v .= ' REDACTED';
+                }
+                $out .= $key.': '.$v."\r\n";
+            }
+        }
+        $out .= "\r\n";
+        $out .= $this->getBodyAsString();
+
+        return $out;
+    }
+}

lib/vendor/sabre/http/lib/RequestDecorator.php

@@ -0,0 +1,179 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * Request Decorator.
+ *
+ * This helper class allows you to easily create decorators for the Request
+ * object.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class RequestDecorator implements RequestInterface
+{
+    use MessageDecoratorTrait;
+
+    /**
+     * Constructor.
+     */
+    public function __construct(RequestInterface $inner)
+    {
+        $this->inner = $inner;
+    }
+
+    /**
+     * Returns the current HTTP method.
+     */
+    public function getMethod(): string
+    {
+        return $this->inner->getMethod();
+    }
+
+    /**
+     * Sets the HTTP method.
+     */
+    public function setMethod(string $method)
+    {
+        $this->inner->setMethod($method);
+    }
+
+    /**
+     * Returns the request url.
+     */
+    public function getUrl(): string
+    {
+        return $this->inner->getUrl();
+    }
+
+    /**
+     * Sets the request url.
+     */
+    public function setUrl(string $url)
+    {
+        $this->inner->setUrl($url);
+    }
+
+    /**
+     * Returns the absolute url.
+     */
+    public function getAbsoluteUrl(): string
+    {
+        return $this->inner->getAbsoluteUrl();
+    }
+
+    /**
+     * Sets the absolute url.
+     */
+    public function setAbsoluteUrl(string $url)
+    {
+        $this->inner->setAbsoluteUrl($url);
+    }
+
+    /**
+     * Returns the current base url.
+     */
+    public function getBaseUrl(): string
+    {
+        return $this->inner->getBaseUrl();
+    }
+
+    /**
+     * Sets a base url.
+     *
+     * This url is used for relative path calculations.
+     *
+     * The base url should default to /
+     */
+    public function setBaseUrl(string $url)
+    {
+        $this->inner->setBaseUrl($url);
+    }
+
+    /**
+     * Returns the relative path.
+     *
+     * This is being calculated using the base url. This path will not start
+     * with a slash, so it will always return something like
+     * 'example/path.html'.
+     *
+     * If the full path is equal to the base url, this method will return an
+     * empty string.
+     *
+     * This method will also urldecode the path, and if the url was encoded as
+     * ISO-8859-1, it will convert it to UTF-8.
+     *
+     * If the path is outside of the base url, a LogicException will be thrown.
+     */
+    public function getPath(): string
+    {
+        return $this->inner->getPath();
+    }
+
+    /**
+     * Returns the list of query parameters.
+     *
+     * This is equivalent to PHP's $_GET superglobal.
+     */
+    public function getQueryParameters(): array
+    {
+        return $this->inner->getQueryParameters();
+    }
+
+    /**
+     * Returns the POST data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     */
+    public function getPostData(): array
+    {
+        return $this->inner->getPostData();
+    }
+
+    /**
+     * Sets the post data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     *
+     * This would not have been needed, if POST data was accessible as
+     * php://input, but unfortunately we need to special case it.
+     */
+    public function setPostData(array $postData)
+    {
+        $this->inner->setPostData($postData);
+    }
+
+    /**
+     * Returns an item from the _SERVER array.
+     *
+     * If the value does not exist in the array, null is returned.
+     *
+     * @return string|null
+     */
+    public function getRawServerValue(string $valueName)
+    {
+        return $this->inner->getRawServerValue($valueName);
+    }
+
+    /**
+     * Sets the _SERVER array.
+     */
+    public function setRawServerData(array $data)
+    {
+        $this->inner->setRawServerData($data);
+    }
+
+    /**
+     * Serializes the request object as a string.
+     *
+     * This is useful for debugging purposes.
+     */
+    public function __toString(): string
+    {
+        return $this->inner->__toString();
+    }
+}

lib/vendor/sabre/http/lib/RequestInterface.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * The RequestInterface represents a HTTP request.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface RequestInterface extends MessageInterface
+{
+    /**
+     * Returns the current HTTP method.
+     */
+    public function getMethod(): string;
+
+    /**
+     * Sets the HTTP method.
+     */
+    public function setMethod(string $method);
+
+    /**
+     * Returns the request url.
+     */
+    public function getUrl(): string;
+
+    /**
+     * Sets the request url.
+     */
+    public function setUrl(string $url);
+
+    /**
+     * Returns the absolute url.
+     */
+    public function getAbsoluteUrl(): string;
+
+    /**
+     * Sets the absolute url.
+     */
+    public function setAbsoluteUrl(string $url);
+
+    /**
+     * Returns the current base url.
+     */
+    public function getBaseUrl(): string;
+
+    /**
+     * Sets a base url.
+     *
+     * This url is used for relative path calculations.
+     *
+     * The base url should default to /
+     */
+    public function setBaseUrl(string $url);
+
+    /**
+     * Returns the relative path.
+     *
+     * This is being calculated using the base url. This path will not start
+     * with a slash, so it will always return something like
+     * 'example/path.html'.
+     *
+     * If the full path is equal to the base url, this method will return an
+     * empty string.
+     *
+     * This method will also urldecode the path, and if the url was encoded as
+     * ISO-8859-1, it will convert it to UTF-8.
+     *
+     * If the path is outside of the base url, a LogicException will be thrown.
+     */
+    public function getPath(): string;
+
+    /**
+     * Returns the list of query parameters.
+     *
+     * This is equivalent to PHP's $_GET superglobal.
+     */
+    public function getQueryParameters(): array;
+
+    /**
+     * Returns the POST data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     */
+    public function getPostData(): array;
+
+    /**
+     * Sets the post data.
+     *
+     * This is equivalent to PHP's $_POST superglobal.
+     *
+     * This would not have been needed, if POST data was accessible as
+     * php://input, but unfortunately we need to special case it.
+     */
+    public function setPostData(array $postData);
+
+    /**
+     * Returns an item from the _SERVER array.
+     *
+     * If the value does not exist in the array, null is returned.
+     *
+     * @return string|null
+     */
+    public function getRawServerValue(string $valueName);
+
+    /**
+     * Sets the _SERVER array.
+     */
+    public function setRawServerData(array $data);
+}

lib/vendor/sabre/http/lib/Response.php

@@ -0,0 +1,187 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This class represents a single HTTP response.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Response extends Message implements ResponseInterface
+{
+    /**
+     * This is the list of currently registered HTTP status codes.
+     *
+     * @var array
+     */
+    public static $statusCodes = [
+        100 => 'Continue',
+        101 => 'Switching Protocols',
+        102 => 'Processing',
+        200 => 'OK',
+        201 => 'Created',
+        202 => 'Accepted',
+        203 => 'Non-Authoritative Information',
+        204 => 'No Content',
+        205 => 'Reset Content',
+        206 => 'Partial Content',
+        207 => 'Multi-Status', // RFC 4918
+        208 => 'Already Reported', // RFC 5842
+        226 => 'IM Used', // RFC 3229
+        300 => 'Multiple Choices',
+        301 => 'Moved Permanently',
+        302 => 'Found',
+        303 => 'See Other',
+        304 => 'Not Modified',
+        305 => 'Use Proxy',
+        307 => 'Temporary Redirect',
+        308 => 'Permanent Redirect',
+        400 => 'Bad Request',
+        401 => 'Unauthorized',
+        402 => 'Payment Required',
+        403 => 'Forbidden',
+        404 => 'Not Found',
+        405 => 'Method Not Allowed',
+        406 => 'Not Acceptable',
+        407 => 'Proxy Authentication Required',
+        408 => 'Request Timeout',
+        409 => 'Conflict',
+        410 => 'Gone',
+        411 => 'Length Required',
+        412 => 'Precondition failed',
+        413 => 'Request Entity Too Large',
+        414 => 'Request-URI Too Long',
+        415 => 'Unsupported Media Type',
+        416 => 'Requested Range Not Satisfiable',
+        417 => 'Expectation Failed',
+        418 => 'I\'m a teapot', // RFC 2324
+        421 => 'Misdirected Request', // RFC7540 (HTTP/2)
+        422 => 'Unprocessable Entity', // RFC 4918
+        423 => 'Locked', // RFC 4918
+        424 => 'Failed Dependency', // RFC 4918
+        426 => 'Upgrade Required',
+        428 => 'Precondition Required', // RFC 6585
+        429 => 'Too Many Requests', // RFC 6585
+        431 => 'Request Header Fields Too Large', // RFC 6585
+        451 => 'Unavailable For Legal Reasons', // draft-tbray-http-legally-restricted-status
+        500 => 'Internal Server Error',
+        501 => 'Not Implemented',
+        502 => 'Bad Gateway',
+        503 => 'Service Unavailable',
+        504 => 'Gateway Timeout',
+        505 => 'HTTP Version not supported',
+        506 => 'Variant Also Negotiates',
+        507 => 'Insufficient Storage', // RFC 4918
+        508 => 'Loop Detected', // RFC 5842
+        509 => 'Bandwidth Limit Exceeded', // non-standard
+        510 => 'Not extended',
+        511 => 'Network Authentication Required', // RFC 6585
+    ];
+
+    /**
+     * HTTP status code.
+     *
+     * @var int
+     */
+    protected $status;
+
+    /**
+     * HTTP status text.
+     *
+     * @var string
+     */
+    protected $statusText;
+
+    /**
+     * Creates the response object.
+     *
+     * @param string|int $status
+     * @param resource   $body
+     */
+    public function __construct($status = 500, ?array $headers = null, $body = null)
+    {
+        if (null !== $status) {
+            $this->setStatus($status);
+        }
+        if (null !== $headers) {
+            $this->setHeaders($headers);
+        }
+        if (null !== $body) {
+            $this->setBody($body);
+        }
+    }
+
+    /**
+     * Returns the current HTTP status code.
+     */
+    public function getStatus(): int
+    {
+        return $this->status;
+    }
+
+    /**
+     * Returns the human-readable status string.
+     *
+     * In the case of a 200, this may for example be 'OK'.
+     */
+    public function getStatusText(): string
+    {
+        return $this->statusText;
+    }
+
+    /**
+     * Sets the HTTP status code.
+     *
+     * This can be either the full HTTP status code with human-readable string,
+     * for example: "403 I can't let you do that, Dave".
+     *
+     * Or just the code, in which case the appropriate default message will be
+     * added.
+     *
+     * @param string|int $status
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setStatus($status)
+    {
+        if (is_int($status) || ctype_digit($status)) {
+            $statusCode = $status;
+            $statusText = self::$statusCodes[$status] ?? 'Unknown';
+        } else {
+            list(
+                $statusCode,
+                $statusText
+            ) = explode(' ', $status, 2);
+            $statusCode = (int) $statusCode;
+        }
+        if ($statusCode < 100 || $statusCode > 999) {
+            throw new \InvalidArgumentException('The HTTP status code must be exactly 3 digits');
+        }
+
+        $this->status = $statusCode;
+        $this->statusText = $statusText;
+    }
+
+    /**
+     * Serializes the response object as a string.
+     *
+     * This is useful for debugging purposes.
+     */
+    public function __toString(): string
+    {
+        $str = 'HTTP/'.$this->httpVersion.' '.$this->getStatus().' '.$this->getStatusText()."\r\n";
+        foreach ($this->getHeaders() as $key => $value) {
+            foreach ($value as $v) {
+                $str .= $key.': '.$v."\r\n";
+            }
+        }
+        $str .= "\r\n";
+        $str .= $this->getBodyAsString();
+
+        return $str;
+    }
+}

lib/vendor/sabre/http/lib/ResponseDecorator.php

@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * Response Decorator.
+ *
+ * This helper class allows you to easily create decorators for the Response
+ * object.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ResponseDecorator implements ResponseInterface
+{
+    use MessageDecoratorTrait;
+
+    /**
+     * Constructor.
+     */
+    public function __construct(ResponseInterface $inner)
+    {
+        $this->inner = $inner;
+    }
+
+    /**
+     * Returns the current HTTP status code.
+     */
+    public function getStatus(): int
+    {
+        return $this->inner->getStatus();
+    }
+
+    /**
+     * Returns the human-readable status string.
+     *
+     * In the case of a 200, this may for example be 'OK'.
+     */
+    public function getStatusText(): string
+    {
+        return $this->inner->getStatusText();
+    }
+
+    /**
+     * Sets the HTTP status code.
+     *
+     * This can be either the full HTTP status code with human-readable string,
+     * for example: "403 I can't let you do that, Dave".
+     *
+     * Or just the code, in which case the appropriate default message will be
+     * added.
+     *
+     * @param string|int $status
+     */
+    public function setStatus($status)
+    {
+        $this->inner->setStatus($status);
+    }
+
+    /**
+     * Serializes the request object as a string.
+     *
+     * This is useful for debugging purposes.
+     */
+    public function __toString(): string
+    {
+        return $this->inner->__toString();
+    }
+}

lib/vendor/sabre/http/lib/ResponseInterface.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This interface represents a HTTP response.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface ResponseInterface extends MessageInterface
+{
+    /**
+     * Returns the current HTTP status code.
+     */
+    public function getStatus(): int;
+
+    /**
+     * Returns the human-readable status string.
+     *
+     * In the case of a 200, this may for example be 'OK'.
+     */
+    public function getStatusText(): string;
+
+    /**
+     * Sets the HTTP status code.
+     *
+     * This can be either the full HTTP status code with human-readable string,
+     * for example: "403 I can't let you do that, Dave".
+     *
+     * Or just the code, in which case the appropriate default message will be
+     * added.
+     *
+     * @param string|int $status
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setStatus($status);
+}

lib/vendor/sabre/http/lib/Sapi.php

@@ -0,0 +1,240 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * PHP SAPI.
+ *
+ * This object is responsible for:
+ * 1. Constructing a Request object based on the current HTTP request sent to
+ *    the PHP process.
+ * 2. Sending the Response object back to the client.
+ *
+ * It could be said that this class provides a mapping between the Request and
+ * Response objects, and php's:
+ *
+ * * $_SERVER
+ * * $_POST
+ * * $_FILES
+ * * php://input
+ * * echo()
+ * * header()
+ * * php://output
+ *
+ * You can choose to either call all these methods statically, but you can also
+ * instantiate this as an object to allow for polymorphism.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Sapi
+{
+    /**
+     * This static method will create a new Request object, based on the
+     * current PHP request.
+     */
+    public static function getRequest(): Request
+    {
+        $serverArr = $_SERVER;
+
+        if ('cli' === PHP_SAPI) {
+            // If we're running off the CLI, we're going to set some default
+            // settings.
+            $serverArr['REQUEST_URI'] = $_SERVER['REQUEST_URI'] ?? '/';
+            $serverArr['REQUEST_METHOD'] = $_SERVER['REQUEST_METHOD'] ?? 'CLI';
+        }
+
+        $r = self::createFromServerArray($serverArr);
+        $r->setBody(fopen('php://input', 'r'));
+        $r->setPostData($_POST);
+
+        return $r;
+    }
+
+    /**
+     * Sends the HTTP response back to a HTTP client.
+     *
+     * This calls php's header() function and streams the body to php://output.
+     */
+    public static function sendResponse(ResponseInterface $response)
+    {
+        header('HTTP/'.$response->getHttpVersion().' '.$response->getStatus().' '.$response->getStatusText());
+        foreach ($response->getHeaders() as $key => $value) {
+            foreach ($value as $k => $v) {
+                if (0 === $k) {
+                    header($key.': '.$v);
+                } else {
+                    header($key.': '.$v, false);
+                }
+            }
+        }
+
+        $body = $response->getBody();
+        if (null === $body) {
+            return;
+        }
+
+        if (is_callable($body)) {
+            $body();
+
+            return;
+        }
+
+        $contentLength = $response->getHeader('Content-Length');
+        if (null !== $contentLength) {
+            $output = fopen('php://output', 'wb');
+            if (is_resource($body) && 'stream' == get_resource_type($body)) {
+                // a workaround to make PHP more possible to use mmap based copy, see https://github.com/sabre-io/http/pull/119
+                $left = (int) $contentLength;
+                // copy with 4MiB chunks
+                $chunk_size = 4 * 1024 * 1024;
+                stream_set_chunk_size($output, $chunk_size);
+                // If this is a partial response, flush the beginning bytes until the first position that is a multiple of the page size.
+                $contentRange = $response->getHeader('Content-Range');
+                // Matching "Content-Range: bytes 1234-5678/7890"
+                if (null !== $contentRange && preg_match('/^bytes\s([0-9]+)-([0-9]+)\//i', $contentRange, $matches)) {
+                    // 4kB should be the default page size on most architectures
+                    $pageSize = 4096;
+                    $offset = (int) $matches[1];
+                    $delta = ($offset % $pageSize) > 0 ? ($pageSize - $offset % $pageSize) : 0;
+                    if ($delta > 0) {
+                        $left -= stream_copy_to_stream($body, $output, min($delta, $left));
+                    }
+                }
+                while ($left > 0) {
+                    $copied = stream_copy_to_stream($body, $output, min($left, $chunk_size));
+                    // stream_copy_to_stream($src, $dest, $maxLength) must return the number of bytes copied or false in case of failure
+                    // But when the $maxLength is greater than the total number of bytes remaining in the stream,
+                    // It returns the negative number of bytes copied
+                    // So break the loop in such cases.
+                    if ($copied <= 0) {
+                        break;
+                    }
+                    // Abort on client disconnect.
+                    // With ignore_user_abort(true), the script is not aborted on client disconnect.
+                    // To avoid reading the entire stream and dismissing the data afterward, check between the chunks if the client is still there.
+                    if (1 === ignore_user_abort() && 1 === connection_aborted()) {
+                        break;
+                    }
+                    $left -= $copied;
+                }
+            } else {
+                fwrite($output, $body, (int) $contentLength);
+            }
+        } else {
+            file_put_contents('php://output', $body);
+        }
+
+        if (is_resource($body)) {
+            fclose($body);
+        }
+    }
+
+    /**
+     * This static method will create a new Request object, based on a PHP
+     * $_SERVER array.
+     *
+     * REQUEST_URI and REQUEST_METHOD are required.
+     */
+    public static function createFromServerArray(array $serverArray): Request
+    {
+        $headers = [];
+        $method = null;
+        $url = null;
+        $httpVersion = '1.1';
+
+        $protocol = 'http';
+        $hostName = 'localhost';
+
+        foreach ($serverArray as $key => $value) {
+            $key = (string) $key;
+            switch ($key) {
+                case 'SERVER_PROTOCOL':
+                    if ('HTTP/1.0' === $value) {
+                        $httpVersion = '1.0';
+                    } elseif ('HTTP/2.0' === $value) {
+                        $httpVersion = '2.0';
+                    }
+                    break;
+                case 'REQUEST_METHOD':
+                    $method = $value;
+                    break;
+                case 'REQUEST_URI':
+                    $url = $value;
+                    break;
+
+                    // These sometimes show up without a HTTP_ prefix
+                case 'CONTENT_TYPE':
+                    $headers['Content-Type'] = $value;
+                    break;
+                case 'CONTENT_LENGTH':
+                    $headers['Content-Length'] = $value;
+                    break;
+
+                    // mod_php on apache will put credentials in these variables.
+                    // (fast)cgi does not usually do this, however.
+                case 'PHP_AUTH_USER':
+                    if (isset($serverArray['PHP_AUTH_PW'])) {
+                        $headers['Authorization'] = 'Basic '.base64_encode($value.':'.$serverArray['PHP_AUTH_PW']);
+                    }
+                    break;
+
+                    // Similarly, mod_php may also screw around with digest auth.
+                case 'PHP_AUTH_DIGEST':
+                    $headers['Authorization'] = 'Digest '.$value;
+                    break;
+
+                    // Apache may prefix the HTTP_AUTHORIZATION header with
+                    // REDIRECT_, if mod_rewrite was used.
+                case 'REDIRECT_HTTP_AUTHORIZATION':
+                    $headers['Authorization'] = $value;
+                    break;
+
+                case 'HTTP_HOST':
+                    $hostName = $value;
+                    $headers['Host'] = $value;
+                    break;
+
+                case 'HTTPS':
+                    if (!empty($value) && 'off' !== $value) {
+                        $protocol = 'https';
+                    }
+                    break;
+
+                default:
+                    if ('HTTP_' === substr($key, 0, 5)) {
+                        // It's a HTTP header
+
+                        // Normalizing it to be prettier
+                        $header = strtolower(substr($key, 5));
+
+                        // Transforming dashes into spaces, and upper-casing
+                        // every first letter.
+                        $header = ucwords(str_replace('_', ' ', $header));
+
+                        // Turning spaces into dashes.
+                        $header = str_replace(' ', '-', $header);
+                        $headers[$header] = $value;
+                    }
+                    break;
+            }
+        }
+
+        if (null === $url) {
+            throw new \InvalidArgumentException('The _SERVER array must have a REQUEST_URI key');
+        }
+
+        if (null === $method) {
+            throw new \InvalidArgumentException('The _SERVER array must have a REQUEST_METHOD key');
+        }
+        $r = new Request($method, $url, $headers);
+        $r->setHttpVersion($httpVersion);
+        $r->setRawServerData($serverArray);
+        $r->setAbsoluteUrl($protocol.'://'.$hostName.$url);
+
+        return $r;
+    }
+}

lib/vendor/sabre/http/lib/Version.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * This class contains the version number for the HTTP package.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Version
+{
+    /**
+     * Full version number.
+     */
+    public const VERSION = '5.1.13';
+}

lib/vendor/sabre/http/lib/functions.php

@@ -0,0 +1,410 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+/**
+ * A collection of useful helpers for parsing or generating various HTTP
+ * headers.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+
+/**
+ * Parses a HTTP date-string.
+ *
+ * This method returns false if the date is invalid.
+ *
+ * The following formats are supported:
+ *    Sun, 06 Nov 1994 08:49:37 GMT    ; IMF-fixdate
+ *    Sunday, 06-Nov-94 08:49:37 GMT   ; obsolete RFC 850 format
+ *    Sun Nov  6 08:49:37 1994         ; ANSI C's asctime() format
+ *
+ * See:
+ *   http://tools.ietf.org/html/rfc7231#section-7.1.1.1
+ *
+ * @return bool|\DateTime
+ */
+function parseDate(string $dateString)
+{
+    // Only the format is checked, valid ranges are checked by strtotime below
+    $month = '(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)';
+    $weekday = '(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)';
+    $wkday = '(Mon|Tue|Wed|Thu|Fri|Sat|Sun)';
+    $time = '([0-1]\d|2[0-3])(\:[0-5]\d){2}';
+    $date3 = $month.' ([12]\d|3[01]| [1-9])';
+    $date2 = '(0[1-9]|[12]\d|3[01])\-'.$month.'\-\d{2}';
+    // 4-digit year cannot begin with 0 - unix timestamp begins in 1970
+    $date1 = '(0[1-9]|[12]\d|3[01]) '.$month.' [1-9]\d{3}';
+
+    // ANSI C's asctime() format
+    // 4-digit year cannot begin with 0 - unix timestamp begins in 1970
+    $asctime_date = $wkday.' '.$date3.' '.$time.' [1-9]\d{3}';
+    // RFC 850, obsoleted by RFC 1036
+    $rfc850_date = $weekday.', '.$date2.' '.$time.' GMT';
+    // RFC 822, updated by RFC 1123
+    $rfc1123_date = $wkday.', '.$date1.' '.$time.' GMT';
+    // allowed date formats by RFC 2616
+    $HTTP_date = "($rfc1123_date|$rfc850_date|$asctime_date)";
+
+    // allow for space around the string and strip it
+    $dateString = trim($dateString, ' ');
+    if (!preg_match('/^'.$HTTP_date.'$/', $dateString)) {
+        return false;
+    }
+
+    // append implicit GMT timezone to ANSI C time format
+    if (false === strpos($dateString, ' GMT')) {
+        $dateString .= ' GMT';
+    }
+
+    try {
+        return new \DateTime($dateString, new \DateTimeZone('UTC'));
+    } catch (\Exception $e) {
+        return false;
+    }
+}
+
+/**
+ * Transforms a DateTime object to a valid HTTP/1.1 Date header value.
+ */
+function toDate(\DateTime $dateTime): string
+{
+    // We need to clone it, as we don't want to affect the existing
+    // DateTime.
+    $dateTime = clone $dateTime;
+    $dateTime->setTimezone(new \DateTimeZone('GMT'));
+
+    return $dateTime->format('D, d M Y H:i:s \G\M\T');
+}
+
+/**
+ * This function can be used to aid with content negotiation.
+ *
+ * It takes 2 arguments, the $acceptHeaderValue, which usually comes from
+ * an Accept header, and $availableOptions, which contains an array of
+ * items that the server can support.
+ *
+ * The result of this function will be the 'best possible option'. If no
+ * best possible option could be found, null is returned.
+ *
+ * When it's null you can according to the spec either return a default, or
+ * you can choose to emit 406 Not Acceptable.
+ *
+ * The method also accepts sending 'null' for the $acceptHeaderValue,
+ * implying that no accept header was sent.
+ *
+ * @param string|null $acceptHeaderValue
+ *
+ * @return string|null
+ */
+function negotiateContentType($acceptHeaderValue, array $availableOptions)
+{
+    if (!$acceptHeaderValue) {
+        // Grabbing the first in the list.
+        return reset($availableOptions);
+    }
+
+    $proposals = array_map(
+        'Sabre\HTTP\parseMimeType',
+        explode(',', $acceptHeaderValue)
+    );
+
+    // Ensuring array keys are reset.
+    $availableOptions = array_values($availableOptions);
+
+    $options = array_map(
+        'Sabre\HTTP\parseMimeType',
+        $availableOptions
+    );
+
+    $lastQuality = 0;
+    $lastSpecificity = 0;
+    $lastOptionIndex = 0;
+    $lastChoice = null;
+
+    foreach ($proposals as $proposal) {
+        // Ignoring broken values.
+        if (null === $proposal) {
+            continue;
+        }
+
+        // If the quality is lower we don't have to bother comparing.
+        if ($proposal['quality'] < $lastQuality) {
+            continue;
+        }
+
+        foreach ($options as $optionIndex => $option) {
+            if ('*' !== $proposal['type'] && $proposal['type'] !== $option['type']) {
+                // no match on type.
+                continue;
+            }
+            if ('*' !== $proposal['subType'] && $proposal['subType'] !== $option['subType']) {
+                // no match on subtype.
+                continue;
+            }
+
+            // Any parameters appearing on the options must appear on
+            // proposals.
+            foreach ($option['parameters'] as $paramName => $paramValue) {
+                if (!array_key_exists($paramName, $proposal['parameters'])) {
+                    continue 2;
+                }
+                if ($paramValue !== $proposal['parameters'][$paramName]) {
+                    continue 2;
+                }
+            }
+
+            // If we got here, we have a match on parameters, type and
+            // subtype. We need to calculate a score for how specific the
+            // match was.
+            $specificity =
+                ('*' !== $proposal['type'] ? 20 : 0) +
+                ('*' !== $proposal['subType'] ? 10 : 0) +
+                count($option['parameters']);
+
+            // Does this entry win?
+            if (
+                ($proposal['quality'] > $lastQuality)
+                || ($proposal['quality'] === $lastQuality && $specificity > $lastSpecificity)
+                || ($proposal['quality'] === $lastQuality && $specificity === $lastSpecificity && $optionIndex < $lastOptionIndex)
+            ) {
+                $lastQuality = $proposal['quality'];
+                $lastSpecificity = $specificity;
+                $lastOptionIndex = $optionIndex;
+                $lastChoice = $availableOptions[$optionIndex];
+            }
+        }
+    }
+
+    return $lastChoice;
+}
+
+/**
+ * Parses the Prefer header, as defined in RFC7240.
+ *
+ * Input can be given as a single header value (string) or multiple headers
+ * (array of string).
+ *
+ * This method will return a key->value array with the various Prefer
+ * parameters.
+ *
+ * Prefer: return=minimal will result in:
+ *
+ * [ 'return' => 'minimal' ]
+ *
+ * Prefer: foo, wait=10 will result in:
+ *
+ * [ 'foo' => true, 'wait' => '10']
+ *
+ * This method also supports the formats from older drafts of RFC7240, and
+ * it will automatically map them to the new values, as the older values
+ * are still pretty common.
+ *
+ * Parameters are currently discarded. There's no known prefer value that
+ * uses them.
+ *
+ * @param string|string[] $input
+ */
+function parsePrefer($input): array
+{
+    $token = '[!#$%&\'*+\-.^_`~A-Za-z0-9]+';
+
+    // Work in progress
+    $word = '(?: [a-zA-Z0-9]+ | "[a-zA-Z0-9]*" )';
+
+    $regex = <<<REGEX
+/
+^
+(?<name> $token)      # Prefer property name
+\s*                   # Optional space
+(?: = \s*             # Prefer property value
+   (?<value> $word)
+)?
+(?: \s* ; (?: .*))?   # Prefer parameters (ignored)
+$
+/x
+REGEX;
+
+    $output = [];
+    foreach (getHeaderValues($input) as $value) {
+        if (!preg_match($regex, $value, $matches)) {
+            // Ignore
+            continue;
+        }
+
+        // Mapping old values to their new counterparts
+        switch ($matches['name']) {
+            case 'return-asynch':
+                $output['respond-async'] = true;
+                break;
+            case 'return-representation':
+                $output['return'] = 'representation';
+                break;
+            case 'return-minimal':
+                $output['return'] = 'minimal';
+                break;
+            case 'strict':
+                $output['handling'] = 'strict';
+                break;
+            case 'lenient':
+                $output['handling'] = 'lenient';
+                break;
+            default:
+                if (isset($matches['value'])) {
+                    $value = trim($matches['value'], '"');
+                } else {
+                    $value = true;
+                }
+                $output[strtolower($matches['name'])] = empty($value) ? true : $value;
+                break;
+        }
+    }
+
+    return $output;
+}
+
+/**
+ * This method splits up headers into all their individual values.
+ *
+ * A HTTP header may have more than one header, such as this:
+ *   Cache-Control: private, no-store
+ *
+ * Header values are always split with a comma.
+ *
+ * You can pass either a string, or an array. The resulting value is always
+ * an array with each spliced value.
+ *
+ * If the second headers argument is set, this value will simply be merged
+ * in. This makes it quicker to merge an old list of values with a new set.
+ *
+ * @param string|string[] $values
+ * @param string|string[] $values2
+ */
+function getHeaderValues($values, $values2 = null): array
+{
+    $values = (array) $values;
+    if ($values2) {
+        $values = array_merge($values, (array) $values2);
+    }
+
+    $result = [];
+    foreach ($values as $l1) {
+        foreach (explode(',', $l1) as $l2) {
+            $result[] = trim($l2);
+        }
+    }
+
+    return $result;
+}
+
+/**
+ * Parses a mime-type and splits it into:.
+ *
+ * 1. type
+ * 2. subtype
+ * 3. quality
+ * 4. parameters
+ */
+function parseMimeType(string $str): array
+{
+    $parameters = [];
+    // If no q= parameter appears, then quality = 1.
+    $quality = 1;
+
+    $parts = explode(';', $str);
+
+    // The first part is the mime-type.
+    $mimeType = trim(array_shift($parts));
+
+    if ('*' === $mimeType) {
+        $mimeType = '*/*';
+    }
+
+    $mimeType = explode('/', $mimeType);
+    if (2 !== count($mimeType)) {
+        // Illegal value
+        var_dump($mimeType);
+        exit;
+        // throw new InvalidArgumentException('Not a valid mime-type: '.$str);
+    }
+    list($type, $subType) = $mimeType;
+
+    foreach ($parts as $part) {
+        $part = trim($part);
+        if (strpos($part, '=')) {
+            list($partName, $partValue) =
+                explode('=', $part, 2);
+        } else {
+            $partName = $part;
+            $partValue = null;
+        }
+
+        // The quality parameter, if it appears, also marks the end of
+        // the parameter list. Anything after the q= counts as an
+        // 'accept extension' and could introduce new semantics in
+        // content-negotiation.
+        if ('q' !== $partName) {
+            $parameters[$partName] = $part;
+        } else {
+            $quality = (float) $partValue;
+            break; // Stop parsing parts
+        }
+    }
+
+    return [
+        'type' => $type,
+        'subType' => $subType,
+        'quality' => $quality,
+        'parameters' => $parameters,
+    ];
+}
+
+/**
+ * Encodes the path of a url.
+ *
+ * slashes (/) are treated as path-separators.
+ */
+function encodePath(string $path): string
+{
+    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\)\/:@])/', function ($match) {
+        return '%'.sprintf('%02x', ord($match[0]));
+    }, $path);
+}
+
+/**
+ * Encodes a 1 segment of a path.
+ *
+ * Slashes are considered part of the name, and are encoded as %2f
+ */
+function encodePathSegment(string $pathSegment): string
+{
+    return preg_replace_callback('/([^A-Za-z0-9_\-\.~\(\):@])/', function ($match) {
+        return '%'.sprintf('%02x', ord($match[0]));
+    }, $pathSegment);
+}
+
+/**
+ * Decodes a url-encoded path.
+ */
+function decodePath(string $path): string
+{
+    return decodePathSegment($path);
+}
+
+/**
+ * Decodes a url-encoded path segment.
+ */
+function decodePathSegment(string $path): string
+{
+    $path = rawurldecode($path);
+
+    if (!mb_check_encoding($path, 'UTF-8') && mb_check_encoding($path, 'ISO-8859-1')) {
+        $path = mb_convert_encoding($path, 'UTF-8', 'ISO-8859-1');
+    }
+
+    return $path;
+}

lib/vendor/sabre/http/phpstan.neon

@@ -0,0 +1,2 @@
+parameters:
+  level: 1

lib/vendor/sabre/http/tests/HTTP/Auth/AWSTest.php

@@ -0,0 +1,236 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+
+class AWSTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var Sabre\HTTP\Response
+     */
+    private $response;
+
+    /**
+     * @var Sabre\HTTP\Request
+     */
+    private $request;
+
+    /**
+     * @var Sabre\HTTP\Auth\AWS
+     */
+    private $auth;
+
+    public const REALM = 'SabreDAV unittest';
+
+    public function setUp(): void
+    {
+        $this->response = new Response();
+        $this->request = new Request('GET', '/');
+        $this->auth = new AWS(self::REALM, $this->request, $this->response);
+    }
+
+    public function testNoHeader()
+    {
+        $this->request->setMethod('GET');
+        $result = $this->auth->init();
+
+        $this->assertFalse($result, 'No AWS Authorization header was supplied, so we should have gotten false');
+        $this->assertEquals(AWS::ERR_NOAWSHEADER, $this->auth->errorCode);
+    }
+
+    public function testInvalidAuthorizationHeader()
+    {
+        $this->request->setMethod('GET');
+        $this->request->setHeader('Authorization', 'Invalid Auth Header');
+
+        $this->assertFalse($this->auth->init(), 'The Invalid AWS authorization header');
+    }
+
+    public function testIncorrectContentMD5()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+
+        $this->request->setMethod('GET');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:sig",
+            'Content-MD5' => 'garbage',
+        ]);
+        $this->request->setUrl('/');
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertFalse($result);
+        $this->assertEquals(AWS::ERR_MD5CHECKSUMWRONG, $this->auth->errorCode);
+    }
+
+    public function testNoDate()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+        $content = 'thisisthebody';
+        $contentMD5 = base64_encode(md5($content, true));
+
+        $this->request->setMethod('POST');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:sig",
+            'Content-MD5' => $contentMD5,
+        ]);
+        $this->request->setUrl('/');
+        $this->request->setBody($content);
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertFalse($result);
+        $this->assertEquals(AWS::ERR_INVALIDDATEFORMAT, $this->auth->errorCode);
+    }
+
+    public function testFutureDate()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+        $content = 'thisisthebody';
+        $contentMD5 = base64_encode(md5($content, true));
+
+        $date = new \DateTime('@'.(time() + (60 * 20)));
+        $date->setTimeZone(new \DateTimeZone('GMT'));
+        $date = $date->format('D, d M Y H:i:s \\G\\M\\T');
+
+        $this->request->setMethod('POST');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:sig",
+            'Content-MD5' => $contentMD5,
+            'Date' => $date,
+        ]);
+
+        $this->request->setBody($content);
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertFalse($result);
+        $this->assertEquals(AWS::ERR_REQUESTTIMESKEWED, $this->auth->errorCode);
+    }
+
+    public function testPastDate()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+        $content = 'thisisthebody';
+        $contentMD5 = base64_encode(md5($content, true));
+
+        $date = new \DateTime('@'.(time() - (60 * 20)));
+        $date->setTimeZone(new \DateTimeZone('GMT'));
+        $date = $date->format('D, d M Y H:i:s \\G\\M\\T');
+
+        $this->request->setMethod('POST');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:sig",
+            'Content-MD5' => $contentMD5,
+            'Date' => $date,
+        ]);
+
+        $this->request->setBody($content);
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertFalse($result);
+        $this->assertEquals(AWS::ERR_REQUESTTIMESKEWED, $this->auth->errorCode);
+    }
+
+    public function testIncorrectSignature()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+        $content = 'thisisthebody';
+
+        $contentMD5 = base64_encode(md5($content, true));
+
+        $date = new \DateTime('now');
+        $date->setTimeZone(new \DateTimeZone('GMT'));
+        $date = $date->format('D, d M Y H:i:s \\G\\M\\T');
+
+        $this->request->setUrl('/');
+        $this->request->setMethod('POST');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:sig",
+            'Content-MD5' => $contentMD5,
+            'X-amz-date' => $date,
+        ]);
+        $this->request->setBody($content);
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertFalse($result);
+        $this->assertEquals(AWS::ERR_INVALIDSIGNATURE, $this->auth->errorCode);
+    }
+
+    public function testValidRequest()
+    {
+        $accessKey = 'accessKey';
+        $secretKey = 'secretKey';
+        $content = 'thisisthebody';
+        $contentMD5 = base64_encode(md5($content, true));
+
+        $date = new \DateTime('now');
+        $date->setTimeZone(new \DateTimeZone('GMT'));
+        $date = $date->format('D, d M Y H:i:s \\G\\M\\T');
+
+        $sig = base64_encode($this->hmacsha1($secretKey,
+            "POST\n$contentMD5\n\n$date\nx-amz-date:$date\n/evert"
+        ));
+
+        $this->request->setUrl('/evert');
+        $this->request->setMethod('POST');
+        $this->request->setHeaders([
+            'Authorization' => "AWS $accessKey:$sig",
+            'Content-MD5' => $contentMD5,
+            'X-amz-date' => $date,
+        ]);
+
+        $this->request->setBody($content);
+
+        $this->auth->init();
+        $result = $this->auth->validate($secretKey);
+
+        $this->assertTrue($result, 'Signature did not validate, got errorcode '.$this->auth->errorCode);
+        $this->assertEquals($accessKey, $this->auth->getAccessKey());
+    }
+
+    public function test401()
+    {
+        $this->auth->requireLogin();
+        $test = preg_match('/^AWS$/', $this->response->getHeader('WWW-Authenticate'), $matches);
+        $this->assertTrue(true == $test, 'The WWW-Authenticate response didn\'t match our pattern');
+    }
+
+    /**
+     * Generates an HMAC-SHA1 signature.
+     *
+     * @param string $key
+     * @param string $message
+     *
+     * @return string
+     */
+    private function hmacsha1($key, $message)
+    {
+        $blocksize = 64;
+        if (strlen($key) > $blocksize) {
+            $key = pack('H*', sha1($key));
+        }
+        $key = str_pad($key, $blocksize, chr(0x00));
+        $ipad = str_repeat(chr(0x36), $blocksize);
+        $opad = str_repeat(chr(0x5C), $blocksize);
+        $hmac = pack('H*', sha1(($key ^ $opad).pack('H*', sha1(($key ^ $ipad).$message))));
+
+        return $hmac;
+    }
+}

lib/vendor/sabre/http/tests/HTTP/Auth/BasicTest.php

@@ -0,0 +1,67 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+
+class BasicTest extends \PHPUnit\Framework\TestCase
+{
+    public function testGetCredentials()
+    {
+        $request = new Request('GET', '/', [
+            'Authorization' => 'Basic '.base64_encode('user:pass:bla'),
+        ]);
+
+        $basic = new Basic('Dagger', $request, new Response());
+
+        $this->assertEquals([
+            'user',
+            'pass:bla',
+        ], $basic->getCredentials());
+    }
+
+    public function testGetInvalidCredentialsColonMissing()
+    {
+        $request = new Request('GET', '/', [
+            'Authorization' => 'Basic '.base64_encode('userpass'),
+        ]);
+
+        $basic = new Basic('Dagger', $request, new Response());
+
+        $this->assertNull($basic->getCredentials());
+    }
+
+    public function testGetCredentialsNoHeader()
+    {
+        $request = new Request('GET', '/', []);
+        $basic = new Basic('Dagger', $request, new Response());
+
+        $this->assertNull($basic->getCredentials());
+    }
+
+    public function testGetCredentialsNotBasic()
+    {
+        $request = new Request('GET', '/', [
+            'Authorization' => 'QBasic '.base64_encode('user:pass:bla'),
+        ]);
+        $basic = new Basic('Dagger', $request, new Response());
+
+        $this->assertNull($basic->getCredentials());
+    }
+
+    public function testRequireLogin()
+    {
+        $response = new Response();
+        $request = new Request('GET', '/');
+
+        $basic = new Basic('Dagger', $request, $response);
+
+        $basic->requireLogin();
+
+        $this->assertEquals('Basic realm="Dagger", charset="UTF-8"', $response->getHeader('WWW-Authenticate'));
+        $this->assertEquals(401, $response->getStatus());
+    }
+}

lib/vendor/sabre/http/tests/HTTP/Auth/BearerTest.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+
+class BearerTest extends \PHPUnit\Framework\TestCase
+{
+    public function testGetToken()
+    {
+        $request = new Request('GET', '/', [
+            'Authorization' => 'Bearer 12345',
+        ]);
+
+        $bearer = new Bearer('Dagger', $request, new Response());
+
+        $this->assertEquals(
+            '12345',
+            $bearer->getToken()
+        );
+    }
+
+    public function testGetCredentialsNoHeader()
+    {
+        $request = new Request('GET', '/', []);
+        $bearer = new Bearer('Dagger', $request, new Response());
+
+        $this->assertNull($bearer->getToken());
+    }
+
+    public function testGetCredentialsNotBearer()
+    {
+        $request = new Request('GET', '/', [
+            'Authorization' => 'QBearer 12345',
+        ]);
+        $bearer = new Bearer('Dagger', $request, new Response());
+
+        $this->assertNull($bearer->getToken());
+    }
+
+    public function testRequireLogin()
+    {
+        $response = new Response();
+        $request = new Request('GET', '/');
+        $bearer = new Bearer('Dagger', $request, $response);
+
+        $bearer->requireLogin();
+
+        $this->assertEquals('Bearer realm="Dagger"', $response->getHeader('WWW-Authenticate'));
+        $this->assertEquals(401, $response->getStatus());
+    }
+}

lib/vendor/sabre/http/tests/HTTP/Auth/DigestTest.php

@@ -0,0 +1,185 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP\Auth;
+
+use Sabre\HTTP\Request;
+use Sabre\HTTP\Response;
+
+class DigestTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @var Sabre\HTTP\Response
+     */
+    private $response;
+
+    /**
+     * request.
+     *
+     * @var Sabre\HTTP\Request
+     */
+    private $request;
+
+    /**
+     * @var Sabre\HTTP\Auth\Digest
+     */
+    private $auth;
+
+    public const REALM = 'SabreDAV unittest';
+
+    public function setUp(): void
+    {
+        $this->response = new Response();
+        $this->request = new Request('GET', '/');
+        $this->auth = new Digest(self::REALM, $this->request, $this->response);
+    }
+
+    public function testDigest()
+    {
+        list($nonce, $opaque) = $this->getServerTokens();
+
+        $username = 'admin';
+        $password = '12345';
+        $nc = '00002';
+        $cnonce = uniqid();
+
+        $digestHash = md5(
+            md5($username.':'.self::REALM.':'.$password).':'.
+            $nonce.':'.
+            $nc.':'.
+            $cnonce.':'.
+            'auth:'.
+            md5('GET:/')
+        );
+
+        $this->request->setMethod('GET');
+        $this->request->setHeader('Authorization', 'Digest username="'.$username.'", realm="'.self::REALM.'", nonce="'.$nonce.'", uri="/", response="'.$digestHash.'", opaque="'.$opaque.'", qop=auth,nc='.$nc.',cnonce="'.$cnonce.'"');
+
+        $this->auth->init();
+
+        $this->assertEquals($username, $this->auth->getUsername());
+        $this->assertEquals(self::REALM, $this->auth->getRealm());
+        $this->assertTrue($this->auth->validateA1(md5($username.':'.self::REALM.':'.$password)), 'Authentication is deemed invalid through validateA1');
+        $this->assertTrue($this->auth->validatePassword($password), 'Authentication is deemed invalid through validatePassword');
+    }
+
+    public function testInvalidDigest()
+    {
+        list($nonce, $opaque) = $this->getServerTokens();
+
+        $username = 'admin';
+        $password = 12345;
+        $nc = '00002';
+        $cnonce = uniqid();
+
+        $digestHash = md5(
+            md5($username.':'.self::REALM.':'.$password).':'.
+            $nonce.':'.
+            $nc.':'.
+            $cnonce.':'.
+            'auth:'.
+            md5('GET:/')
+        );
+
+        $this->request->setMethod('GET');
+        $this->request->setHeader('Authorization', 'Digest username="'.$username.'", realm="'.self::REALM.'", nonce="'.$nonce.'", uri="/", response="'.$digestHash.'", opaque="'.$opaque.'", qop=auth,nc='.$nc.',cnonce="'.$cnonce.'"');
+
+        $this->auth->init();
+
+        $this->assertFalse($this->auth->validateA1(md5($username.':'.self::REALM.':'.($password.'randomness'))), 'Authentication is deemed invalid through validateA1');
+    }
+
+    public function testInvalidDigest2()
+    {
+        $this->request->setMethod('GET');
+        $this->request->setHeader('Authorization', 'basic blablabla');
+
+        $this->auth->init();
+        $this->assertFalse($this->auth->validateA1(md5('user:realm:password')));
+    }
+
+    public function testDigestAuthInt()
+    {
+        $this->auth->setQOP(Digest::QOP_AUTHINT);
+        list($nonce, $opaque) = $this->getServerTokens(Digest::QOP_AUTHINT);
+
+        $username = 'admin';
+        $password = 12345;
+        $nc = '00003';
+        $cnonce = uniqid();
+
+        $digestHash = md5(
+            md5($username.':'.self::REALM.':'.$password).':'.
+            $nonce.':'.
+            $nc.':'.
+            $cnonce.':'.
+            'auth-int:'.
+            md5('POST:/:'.md5('body'))
+        );
+
+        $this->request->setMethod('POST');
+        $this->request->setHeader('Authorization', 'Digest username="'.$username.'", realm="'.self::REALM.'", nonce="'.$nonce.'", uri="/", response="'.$digestHash.'", opaque="'.$opaque.'", qop=auth-int,nc='.$nc.',cnonce="'.$cnonce.'"');
+        $this->request->setBody('body');
+
+        $this->auth->init();
+
+        $this->assertTrue($this->auth->validateA1(md5($username.':'.self::REALM.':'.$password)), 'Authentication is deemed invalid through validateA1');
+    }
+
+    public function testDigestAuthBoth()
+    {
+        $this->auth->setQOP(Digest::QOP_AUTHINT | Digest::QOP_AUTH);
+        list($nonce, $opaque) = $this->getServerTokens(Digest::QOP_AUTHINT | Digest::QOP_AUTH);
+
+        $username = 'admin';
+        $password = 12345;
+        $nc = '00003';
+        $cnonce = uniqid();
+
+        $digestHash = md5(
+            md5($username.':'.self::REALM.':'.$password).':'.
+            $nonce.':'.
+            $nc.':'.
+            $cnonce.':'.
+            'auth-int:'.
+            md5('POST:/:'.md5('body'))
+        );
+
+        $this->request->setMethod('POST');
+        $this->request->setHeader('Authorization', 'Digest username="'.$username.'", realm="'.self::REALM.'", nonce="'.$nonce.'", uri="/", response="'.$digestHash.'", opaque="'.$opaque.'", qop=auth-int,nc='.$nc.',cnonce="'.$cnonce.'"');
+        $this->request->setBody('body');
+
+        $this->auth->init();
+
+        $this->assertTrue($this->auth->validateA1(md5($username.':'.self::REALM.':'.$password)), 'Authentication is deemed invalid through validateA1');
+    }
+
+    private function getServerTokens($qop = Digest::QOP_AUTH)
+    {
+        $this->auth->requireLogin();
+
+        switch ($qop) {
+            case Digest::QOP_AUTH: $qopstr = 'auth';
+                break;
+            case Digest::QOP_AUTHINT: $qopstr = 'auth-int';
+                break;
+            default: $qopstr = 'auth,auth-int';
+                break;
+        }
+
+        $test = preg_match('/Digest realm="'.self::REALM.'",qop="'.$qopstr.'",nonce="([0-9a-f]*)",opaque="([0-9a-f]*)"/',
+            $this->response->getHeader('WWW-Authenticate'), $matches);
+
+        $this->assertTrue(true == $test, 'The WWW-Authenticate response didn\'t match our pattern. We received: '.$this->response->getHeader('WWW-Authenticate'));
+
+        $nonce = $matches[1];
+        $opaque = $matches[2];
+
+        // Reset our environment
+        $this->setUp();
+        $this->auth->setQOP($qop);
+
+        return [$nonce, $opaque];
+    }
+}

lib/vendor/sabre/http/tests/HTTP/ClientTest.php

@@ -0,0 +1,605 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class ClientTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCreateCurlSettingsArrayGET()
+    {
+        $client = new ClientMock();
+        $client->addCurlSetting(CURLOPT_POSTREDIR, 0);
+
+        $request = new Request('GET', 'http://example.org/', ['X-Foo' => 'bar']);
+
+        $settings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_POSTREDIR => 0,
+            CURLOPT_HTTPHEADER => ['X-Foo: bar'],
+            CURLOPT_NOBODY => false,
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_CUSTOMREQUEST => 'GET',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+
+        // FIXME: CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS are currently unsupported by HHVM
+        // at least if this unit test fails in the future we know it is :)
+        if (false === defined('HHVM_VERSION')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $this->assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testCreateCurlSettingsHTTPHeader(): void
+    {
+        $client = new ClientMock();
+        $header = [
+            'Authorization: Bearer 12345',
+        ];
+        $client->addCurlSetting(CURLOPT_POSTREDIR, 0);
+        $client->addCurlSetting(CURLOPT_HTTPHEADER, $header);
+
+        $request = new Request('GET', 'http://example.org/');
+
+        $settings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_POSTREDIR => 0,
+            CURLOPT_HTTPHEADER => ['Authorization: Bearer 12345'],
+            CURLOPT_NOBODY => false,
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_CUSTOMREQUEST => 'GET',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+            CURLOPT_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS,
+            CURLOPT_REDIR_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS,
+        ];
+
+        self::assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testCreateCurlSettingsArrayHEAD()
+    {
+        $client = new ClientMock();
+        $request = new Request('HEAD', 'http://example.org/', ['X-Foo' => 'bar']);
+
+        $settings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_NOBODY => true,
+            CURLOPT_CUSTOMREQUEST => 'HEAD',
+            CURLOPT_HTTPHEADER => ['X-Foo: bar'],
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+
+        // FIXME: CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS are currently unsupported by HHVM
+        // at least if this unit test fails in the future we know it is :)
+        if (false === defined('HHVM_VERSION')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $this->assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testCreateCurlSettingsArrayGETAfterHEAD()
+    {
+        $client = new ClientMock();
+        $request = new Request('HEAD', 'http://example.org/', ['X-Foo' => 'bar']);
+
+        // Parsing the settings for this method, and discarding the result.
+        // This will cause the client to automatically persist previous
+        // settings and will help us detect problems.
+        $client->createCurlSettingsArray($request);
+
+        // This is the real request.
+        $request = new Request('GET', 'http://example.org/', ['X-Foo' => 'bar']);
+
+        $settings = [
+            CURLOPT_CUSTOMREQUEST => 'GET',
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_HTTPHEADER => ['X-Foo: bar'],
+            CURLOPT_NOBODY => false,
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+
+        // FIXME: CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS are currently unsupported by HHVM
+        // at least if this unit test fails in the future we know it is :)
+        if (false === defined('HHVM_VERSION')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $this->assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testCreateCurlSettingsArrayPUTStream()
+    {
+        $client = new ClientMock();
+
+        $fileContent = 'booh';
+        $h = fopen('php://memory', 'r+');
+        fwrite($h, $fileContent);
+        $request = new Request('PUT', 'http://example.org/', ['X-Foo' => 'bar'], $h);
+
+        $settings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_PUT => true,
+            CURLOPT_INFILE => $h,
+            CURLOPT_INFILESIZE => strlen($fileContent),
+            CURLOPT_NOBODY => false,
+            CURLOPT_CUSTOMREQUEST => 'PUT',
+            CURLOPT_HTTPHEADER => ['X-Foo: bar'],
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+
+        // FIXME: CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS are currently unsupported by HHVM
+        // at least if this unit test fails in the future we know it is :)
+        if (false === defined('HHVM_VERSION')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $this->assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testCreateCurlSettingsArrayPUTString()
+    {
+        $client = new ClientMock();
+        $request = new Request('PUT', 'http://example.org/', ['X-Foo' => 'bar'], 'boo');
+
+        $settings = [
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_HEADER => true,
+            CURLOPT_NOBODY => false,
+            CURLOPT_POSTFIELDS => 'boo',
+            CURLOPT_CUSTOMREQUEST => 'PUT',
+            CURLOPT_HTTPHEADER => ['X-Foo: bar'],
+            CURLOPT_URL => 'http://example.org/',
+            CURLOPT_USERAGENT => 'sabre-http/'.Version::VERSION.' (http://sabre.io/)',
+        ];
+
+        // FIXME: CURLOPT_PROTOCOLS and CURLOPT_REDIR_PROTOCOLS are currently unsupported by HHVM
+        // at least if this unit test fails in the future we know it is :)
+        if (false === defined('HHVM_VERSION')) {
+            $settings[CURLOPT_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+            $settings[CURLOPT_REDIR_PROTOCOLS] = CURLPROTO_HTTP | CURLPROTO_HTTPS;
+        }
+
+        $this->assertEquals($settings, $client->createCurlSettingsArray($request));
+    }
+
+    public function testIssue89MultiplePutInfileGivesWarning()
+    {
+        $client = new ClientMock();
+        $tmpFile = tmpfile();
+        $request = new Request('POST', 'http://example.org/', ['X-Foo' => 'bar'], 'body');
+
+        $settings = $client->createCurlSettingsArray($request);
+        $this->assertArrayNotHasKey(CURLOPT_PUT, $settings);
+        $this->assertArrayNotHasKey(CURLOPT_INFILE, $settings);
+
+        $request = new Request('POST', 'http://example.org/', ['X-Foo' => 'bar'], $tmpFile);
+
+        $settings = $client->createCurlSettingsArray($request);
+        $this->assertEquals(true, $settings[CURLOPT_PUT]);
+        $this->assertEquals($tmpFile, $settings[CURLOPT_INFILE]);
+
+        $request = new Request('POST', 'http://example.org/', ['X-Foo' => 'bar'], 'body');
+
+        $settings = $client->createCurlSettingsArray($request);
+        $this->assertArrayNotHasKey(CURLOPT_PUT, $settings);
+        $this->assertArrayNotHasKey(CURLOPT_INFILE, $settings);
+    }
+
+    public function testSend()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+
+        $client->on('doRequest', function ($request, &$response) {
+            $response = new Response(200);
+        });
+
+        $response = $client->send($request);
+
+        $this->assertEquals(200, $response->getStatus());
+    }
+
+    protected function getAbsoluteUrl($path)
+    {
+        $baseUrl = getenv('BASEURL');
+        if ($baseUrl) {
+            $path = ltrim($path, '/');
+
+            return "$baseUrl/$path";
+        }
+
+        return false;
+    }
+
+    /**
+     * @group ci
+     */
+    public function testSendToGetLargeContent()
+    {
+        $url = $this->getAbsoluteUrl('/large.php');
+        if (!$url) {
+            $this->markTestSkipped('Set an environment value BASEURL to continue');
+        }
+
+        // Allow the peak memory usage limit to be specified externally, if needed.
+        // When running this test in different environments it may be appropriate to set a different limit.
+        $maxPeakMemoryUsageEnvVariable = 'SABRE_HTTP_TEST_GET_LARGE_CONTENT_MAX_PEAK_MEMORY_USAGE';
+        $maxPeakMemoryUsage = \getenv($maxPeakMemoryUsageEnvVariable);
+        if (false === $maxPeakMemoryUsage) {
+            $maxPeakMemoryUsage = 60 * pow(1024, 2);
+        }
+
+        $request = new Request('GET', $url);
+        $client = new Client();
+        $response = $client->send($request);
+
+        $this->assertEquals(200, $response->getStatus());
+        $this->assertLessThan(
+            (int) $maxPeakMemoryUsage,
+            memory_get_peak_usage(),
+            "Hint: you can adjust the max peak memory usage allowed for this test by defining env variable $maxPeakMemoryUsageEnvVariable to be the desired max bytes"
+        );
+    }
+
+    /**
+     * @group ci
+     */
+    public function testSendAsync()
+    {
+        $url = $this->getAbsoluteUrl('/foo');
+        if (!$url) {
+            $this->markTestSkipped('Set an environment value BASEURL to continue');
+        }
+
+        $client = new Client();
+
+        $request = new Request('GET', $url);
+        $client->sendAsync($request, function (ResponseInterface $response) {
+            $this->assertEquals("foo\n", $response->getBody());
+            $this->assertEquals(200, $response->getStatus());
+            $this->assertEquals(4, $response->getHeader('Content-Length'));
+        }, function ($error) use ($request) {
+            $url = $request->getUrl();
+            $this->fail("Failed to GET $url");
+        });
+
+        $client->wait();
+    }
+
+    /**
+     * @group ci
+     */
+    public function testSendAsynConsecutively()
+    {
+        $url = $this->getAbsoluteUrl('/foo');
+        if (!$url) {
+            $this->markTestSkipped('Set an environment value BASEURL to continue');
+        }
+
+        $client = new Client();
+
+        $request = new Request('GET', $url);
+        $client->sendAsync($request, function (ResponseInterface $response) {
+            $this->assertEquals("foo\n", $response->getBody());
+            $this->assertEquals(200, $response->getStatus());
+            $this->assertEquals(4, $response->getHeader('Content-Length'));
+        }, function ($error) use ($request) {
+            $url = $request->getUrl();
+            $this->fail("Failed to get $url");
+        });
+
+        $url = $this->getAbsoluteUrl('/bar.php');
+        $request = new Request('GET', $url);
+        $client->sendAsync($request, function (ResponseInterface $response) {
+            $this->assertEquals("bar\n", $response->getBody());
+            $this->assertEquals(200, $response->getStatus());
+            $this->assertEquals('Bar', $response->getHeader('X-Test'));
+        }, function ($error) use ($request) {
+            $url = $request->getUrl();
+            $this->fail("Failed to get $url");
+        });
+
+        $client->wait();
+    }
+
+    public function testSendClientError()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+
+        $client->on('doRequest', function ($request, &$response) {
+            throw new ClientException('aaah', 1);
+        });
+        $called = false;
+        $client->on('exception', function () use (&$called) {
+            $called = true;
+        });
+
+        try {
+            $client->send($request);
+            $this->fail('send() should have thrown an exception');
+        } catch (ClientException $e) {
+        }
+        $this->assertTrue($called);
+    }
+
+    public function testSendHttpError()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+
+        $client->on('doRequest', function ($request, &$response) {
+            $response = new Response(404);
+        });
+        $called = 0;
+        $client->on('error', function () use (&$called) {
+            ++$called;
+        });
+        $client->on('error:404', function () use (&$called) {
+            ++$called;
+        });
+
+        $client->send($request);
+        $this->assertEquals(2, $called);
+    }
+
+    public function testSendRetry()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+
+        $called = 0;
+        $client->on('doRequest', function ($request, &$response) use (&$called) {
+            ++$called;
+            if ($called < 3) {
+                $response = new Response(404);
+            } else {
+                $response = new Response(200);
+            }
+        });
+
+        $errorCalled = 0;
+        $client->on('error', function ($request, $response, &$retry, $retryCount) use (&$errorCalled) {
+            ++$errorCalled;
+            $retry = true;
+        });
+
+        $response = $client->send($request);
+        $this->assertEquals(3, $called);
+        $this->assertEquals(2, $errorCalled);
+        $this->assertEquals(200, $response->getStatus());
+    }
+
+    public function testHttpErrorException()
+    {
+        $client = new ClientMock();
+        $client->setThrowExceptions(true);
+        $request = new Request('GET', 'http://example.org/');
+
+        $client->on('doRequest', function ($request, &$response) {
+            $response = new Response(404);
+        });
+
+        try {
+            $client->send($request);
+            $this->fail('An exception should have been thrown');
+        } catch (ClientHttpException $e) {
+            $this->assertEquals(404, $e->getHttpStatus());
+            $this->assertInstanceOf('Sabre\HTTP\Response', $e->getResponse());
+        }
+    }
+
+    public function testParseCurlResult()
+    {
+        $client = new ClientMock();
+        $client->on('curlStuff', function (&$return) {
+            $return = [
+                [
+                    'header_size' => 33,
+                    'http_code' => 200,
+                ],
+                0,
+                '',
+            ];
+        });
+
+        $body = "HTTP/1.1 200 OK\r\nHeader1:Val1\r\n\r\nFoo";
+        $result = $client->parseCurlResult($body, 'foobar');
+
+        $this->assertEquals(Client::STATUS_SUCCESS, $result['status']);
+        $this->assertEquals(200, $result['http_code']);
+        $this->assertEquals(200, $result['response']->getStatus());
+        $this->assertEquals(['Header1' => ['Val1']], $result['response']->getHeaders());
+        $this->assertEquals('Foo', $result['response']->getBodyAsString());
+    }
+
+    public function testParseCurlResultEmptyBody()
+    {
+        $client = new ClientMock();
+        $client->on('curlStuff', function (&$return) {
+            $return = [
+                [
+                    'header_size' => 33,
+                    'http_code' => 200,
+                ],
+                0,
+                '',
+            ];
+        });
+
+        $body = "HTTP/1.1 200 OK\r\nHeader1:Val1\r\n\r\n";
+        $result = $client->parseCurlResult($body, 'foobar');
+
+        $this->assertEquals(Client::STATUS_SUCCESS, $result['status']);
+        $this->assertEquals(200, $result['http_code']);
+        $this->assertEquals(200, $result['response']->getStatus());
+        $this->assertEquals(['Header1' => ['Val1']], $result['response']->getHeaders());
+        $this->assertEquals('', $result['response']->getBodyAsString());
+    }
+
+    public function testParseCurlError()
+    {
+        $client = new ClientMock();
+        $client->on('curlStuff', function (&$return) {
+            $return = [
+                [],
+                1,
+                'Curl error',
+            ];
+        });
+
+        $body = "HTTP/1.1 200 OK\r\nHeader1:Val1\r\n\r\nFoo";
+        $result = $client->parseCurlResult($body, 'foobar');
+
+        $this->assertEquals(Client::STATUS_CURLERROR, $result['status']);
+        $this->assertEquals(1, $result['curl_errno']);
+        $this->assertEquals('Curl error', $result['curl_errmsg']);
+    }
+
+    public function testDoRequest()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+        $client->on('curlExec', function (&$return) {
+            $return = "HTTP/1.1 200 OK\r\nHeader1:Val1\r\n\r\nFoo";
+        });
+        $client->on('curlStuff', function (&$return) {
+            $return = [
+                [
+                    'header_size' => 33,
+                    'http_code' => 200,
+                ],
+                0,
+                '',
+            ];
+        });
+        $response = $client->doRequest($request);
+        $this->assertEquals(200, $response->getStatus());
+        $this->assertEquals(['Header1' => ['Val1']], $response->getHeaders());
+        $this->assertEquals('Foo', $response->getBodyAsString());
+    }
+
+    public function testDoRequestCurlError()
+    {
+        $client = new ClientMock();
+        $request = new Request('GET', 'http://example.org/');
+        $client->on('curlExec', function (&$return) {
+            $return = '';
+        });
+        $client->on('curlStuff', function (&$return) {
+            $return = [
+                [],
+                1,
+                'Curl error',
+            ];
+        });
+
+        try {
+            $response = $client->doRequest($request);
+            $this->fail('This should have thrown an exception');
+        } catch (ClientException $e) {
+            $this->assertEquals(1, $e->getCode());
+            $this->assertEquals('Curl error', $e->getMessage());
+        }
+    }
+}
+
+class ClientMock extends Client
+{
+    protected $persistedSettings = [];
+
+    /**
+     * Making this method public.
+     */
+    public function receiveCurlHeader($curlHandle, $headerLine)
+    {
+        return parent::receiveCurlHeader($curlHandle, $headerLine);
+    }
+
+    /**
+     * Making this method public.
+     */
+    public function createCurlSettingsArray(RequestInterface $request): array
+    {
+        return parent::createCurlSettingsArray($request);
+    }
+
+    /**
+     * Making this method public.
+     */
+    public function parseCurlResult(string $response, $curlHandle): array
+    {
+        return parent::parseCurlResult($response, $curlHandle);
+    }
+
+    /**
+     * This method is responsible for performing a single request.
+     */
+    public function doRequest(RequestInterface $request): ResponseInterface
+    {
+        $response = null;
+        $this->emit('doRequest', [$request, &$response]);
+
+        // If nothing modified $response, we're using the default behavior.
+        if (is_null($response)) {
+            return parent::doRequest($request);
+        } else {
+            return $response;
+        }
+    }
+
+    /**
+     * Returns a bunch of information about a curl request.
+     *
+     * This method exists so it can easily be overridden and mocked.
+     *
+     * @param resource $curlHandle
+     */
+    protected function curlStuff($curlHandle): array
+    {
+        $return = null;
+        $this->emit('curlStuff', [&$return]);
+
+        // If nothing modified $return, we're using the default behavior.
+        if (is_null($return)) {
+            return parent::curlStuff($curlHandle);
+        } else {
+            return $return;
+        }
+    }
+
+    /**
+     * Calls curl_exec.
+     *
+     * This method exists so it can easily be overridden and mocked.
+     *
+     * @param resource $curlHandle
+     */
+    protected function curlExec($curlHandle): string
+    {
+        $return = null;
+        $this->emit('curlExec', [&$return]);
+
+        // If nothing modified $return, we're using the default behavior.
+        if (is_null($return)) {
+            return parent::curlExec($curlHandle);
+        } else {
+            return $return;
+        }
+    }
+}

lib/vendor/sabre/http/tests/HTTP/FunctionsTest.php

@@ -0,0 +1,212 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class FunctionsTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @dataProvider getHeaderValuesDataOnValues2
+     */
+    public function testGetHeaderValuesOnValues2($result, $values1, $values2)
+    {
+        $this->assertEquals($result, getHeaderValues($values1, $values2));
+    }
+
+    public function getHeaderValuesDataOnValues2()
+    {
+        return [
+            [
+                ['a', 'b'],
+                ['a'],
+                ['b'],
+            ],
+            [
+                ['a', 'b', 'c', 'd', 'e'],
+                ['a', 'b', 'c'],
+                ['d', 'e'],
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider getHeaderValuesData
+     */
+    public function testGetHeaderValues($input, $output)
+    {
+        $this->assertEquals(
+            $output,
+            getHeaderValues($input)
+        );
+    }
+
+    public function getHeaderValuesData()
+    {
+        return [
+            [
+                'a',
+                ['a'],
+            ],
+            [
+                'a,b',
+                ['a', 'b'],
+            ],
+            [
+                'a, b',
+                ['a', 'b'],
+            ],
+            [
+                ['a, b'],
+                ['a', 'b'],
+            ],
+            [
+                ['a, b', 'c', 'd,e'],
+                ['a', 'b', 'c', 'd', 'e'],
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider preferData
+     */
+    public function testPrefer($input, $output)
+    {
+        $this->assertEquals(
+            $output,
+            parsePrefer($input)
+        );
+    }
+
+    public function preferData()
+    {
+        return [
+            [
+                'foo; bar',
+                ['foo' => true],
+            ],
+            [
+                'foo; bar=""',
+                ['foo' => true],
+            ],
+            [
+                'foo=""; bar',
+                ['foo' => true],
+            ],
+            [
+                'FOO',
+                ['foo' => true],
+            ],
+            [
+                'respond-async',
+                ['respond-async' => true],
+            ],
+            [
+                ['respond-async, wait=100', 'handling=lenient'],
+                ['respond-async' => true, 'wait' => 100, 'handling' => 'lenient'],
+            ],
+            [
+                ['respond-async, wait=100, handling=lenient'],
+                ['respond-async' => true, 'wait' => 100, 'handling' => 'lenient'],
+            ],
+            // Old values
+            [
+                'return-asynch, return-representation',
+                ['respond-async' => true, 'return' => 'representation'],
+            ],
+            [
+                'return-minimal',
+                ['return' => 'minimal'],
+            ],
+            [
+                'strict',
+                ['handling' => 'strict'],
+            ],
+            [
+                'lenient',
+                ['handling' => 'lenient'],
+            ],
+            // Invalid token
+            [
+                ['foo=%bar%'],
+                [],
+            ],
+        ];
+    }
+
+    public function testParseHTTPDate()
+    {
+        $times = [
+            'Wed, 13 Oct 2010 10:26:00 GMT',
+            'Wednesday, 13-Oct-10 10:26:00 GMT',
+            'Wed Oct 13 10:26:00 2010',
+        ];
+
+        $expected = 1286965560;
+
+        foreach ($times as $time) {
+            $result = parseDate($time);
+            $this->assertEquals($expected, $result->format('U'));
+        }
+
+        $result = parseDate('Wed Oct  6 10:26:00 2010');
+        $this->assertEquals(1286360760, $result->format('U'));
+    }
+
+    public function testParseHTTPDateFail()
+    {
+        $times = [
+            // random string
+            'NOW',
+            // not-GMT timezone
+            'Wednesday, 13-Oct-10 10:26:00 UTC',
+            // No space before the 6
+            'Wed Oct 6 10:26:00 2010',
+            // Invalid day
+            'Wed Oct  0 10:26:00 2010',
+            'Wed Oct 32 10:26:00 2010',
+            'Wed, 0 Oct 2010 10:26:00 GMT',
+            'Wed, 32 Oct 2010 10:26:00 GMT',
+            'Wednesday, 32-Oct-10 10:26:00 GMT',
+            // Invalid hour
+            'Wed, 13 Oct 2010 24:26:00 GMT',
+            'Wednesday, 13-Oct-10 24:26:00 GMT',
+            'Wed Oct 13 24:26:00 2010',
+        ];
+
+        foreach ($times as $time) {
+            $this->assertFalse(parseDate($time), 'We used the string: '.$time);
+        }
+    }
+
+    public function testTimezones()
+    {
+        $default = date_default_timezone_get();
+        date_default_timezone_set('Europe/Amsterdam');
+
+        $this->testParseHTTPDate();
+
+        date_default_timezone_set($default);
+    }
+
+    public function testToHTTPDate()
+    {
+        $dt = new \DateTime('2011-12-10 12:00:00 +0200');
+
+        $this->assertEquals(
+            'Sat, 10 Dec 2011 10:00:00 GMT',
+            toDate($dt)
+        );
+    }
+
+    public function testParseMimeTypeOnInvalidMimeType()
+    {
+        if (false === \getenv('EXECUTE_INVALID_MIME_TYPE_TEST')) {
+            $this->markTestSkipped('Test skipped because parseMimeType with an invalid mime type will exit in 5.x');
+        }
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('Not a valid mime-type: invalid_mime_type');
+
+        parseMimeType('invalid_mime_type');
+    }
+}

lib/vendor/sabre/http/tests/HTTP/MessageDecoratorTest.php

@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class MessageDecoratorTest extends \PHPUnit\Framework\TestCase
+{
+    protected $inner;
+    protected $outer;
+
+    public function setUp(): void
+    {
+        $this->inner = new Request('GET', '/');
+        $this->outer = new RequestDecorator($this->inner);
+    }
+
+    public function testBody()
+    {
+        $this->outer->setBody('foo');
+        $this->assertEquals('foo', stream_get_contents($this->inner->getBodyAsStream()));
+        $this->assertEquals('foo', stream_get_contents($this->outer->getBodyAsStream()));
+        $this->assertEquals('foo', $this->inner->getBodyAsString());
+        $this->assertEquals('foo', $this->outer->getBodyAsString());
+        $this->assertEquals('foo', $this->inner->getBody());
+        $this->assertEquals('foo', $this->outer->getBody());
+    }
+
+    public function testHeaders()
+    {
+        $this->outer->setHeaders([
+            'a' => 'b',
+        ]);
+
+        $this->assertEquals(['a' => ['b']], $this->inner->getHeaders());
+        $this->assertEquals(['a' => ['b']], $this->outer->getHeaders());
+
+        $this->outer->setHeaders([
+            'c' => 'd',
+        ]);
+
+        $this->assertEquals(['a' => ['b'], 'c' => ['d']], $this->inner->getHeaders());
+        $this->assertEquals(['a' => ['b'], 'c' => ['d']], $this->outer->getHeaders());
+
+        $this->outer->addHeaders([
+            'e' => 'f',
+        ]);
+
+        $this->assertEquals(['a' => ['b'], 'c' => ['d'], 'e' => ['f']], $this->inner->getHeaders());
+        $this->assertEquals(['a' => ['b'], 'c' => ['d'], 'e' => ['f']], $this->outer->getHeaders());
+    }
+
+    public function testHeader()
+    {
+        $this->assertFalse($this->outer->hasHeader('a'));
+        $this->assertFalse($this->inner->hasHeader('a'));
+        $this->outer->setHeader('a', 'c');
+        $this->assertTrue($this->outer->hasHeader('a'));
+        $this->assertTrue($this->inner->hasHeader('a'));
+
+        $this->assertEquals('c', $this->inner->getHeader('A'));
+        $this->assertEquals('c', $this->outer->getHeader('A'));
+
+        $this->outer->addHeader('A', 'd');
+
+        $this->assertEquals(
+            ['c', 'd'],
+            $this->inner->getHeaderAsArray('A')
+        );
+        $this->assertEquals(
+            ['c', 'd'],
+            $this->outer->getHeaderAsArray('A')
+        );
+
+        $success = $this->outer->removeHeader('a');
+
+        $this->assertTrue($success);
+        $this->assertNull($this->inner->getHeader('A'));
+        $this->assertNull($this->outer->getHeader('A'));
+
+        $this->assertFalse($this->outer->removeHeader('i-dont-exist'));
+    }
+
+    public function testHttpVersion()
+    {
+        $this->outer->setHttpVersion('1.0');
+
+        $this->assertEquals('1.0', $this->inner->getHttpVersion());
+        $this->assertEquals('1.0', $this->outer->getHttpVersion());
+    }
+}

lib/vendor/sabre/http/tests/HTTP/MessageTest.php

@@ -0,0 +1,281 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class MessageTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstruct()
+    {
+        $message = new MessageMock();
+        $this->assertInstanceOf('Sabre\HTTP\Message', $message);
+    }
+
+    public function testStreamBody()
+    {
+        $body = 'foo';
+        $h = fopen('php://memory', 'r+');
+        fwrite($h, $body);
+        rewind($h);
+
+        $message = new MessageMock();
+        $message->setBody($h);
+
+        $this->assertEquals($body, $message->getBodyAsString());
+        rewind($h);
+        $this->assertEquals($body, stream_get_contents($message->getBodyAsStream()));
+        rewind($h);
+        $this->assertEquals($body, stream_get_contents($message->getBody()));
+    }
+
+    public function testStringBody()
+    {
+        $body = 'foo';
+
+        $message = new MessageMock();
+        $message->setBody($body);
+
+        $this->assertEquals($body, $message->getBodyAsString());
+        $this->assertEquals($body, stream_get_contents($message->getBodyAsStream()));
+        $this->assertEquals($body, $message->getBody());
+    }
+
+    public function testCallbackBodyAsString()
+    {
+        $body = $this->createCallback('foo');
+
+        $message = new MessageMock();
+        $message->setBody($body);
+
+        $string = $message->getBodyAsString();
+
+        $this->assertSame('foo', $string);
+    }
+
+    public function testCallbackBodyAsStream()
+    {
+        $body = $this->createCallback('foo');
+
+        $message = new MessageMock();
+        $message->setBody($body);
+
+        $stream = $message->getBodyAsStream();
+
+        $this->assertSame('foo', stream_get_contents($stream));
+    }
+
+    public function testGetBodyWhenCallback()
+    {
+        $callback = $this->createCallback('foo');
+
+        $message = new MessageMock();
+        $message->setBody($callback);
+
+        $this->assertSame($callback, $message->getBody());
+    }
+
+    /**
+     * It's possible that streams contains more data than the Content-Length.
+     *
+     * The request object should make sure to never emit more than
+     * Content-Length, if Content-Length is set.
+     *
+     * This is in particular useful when responding to range requests with
+     * streams that represent files on the filesystem, as it's possible to just
+     * seek the stream to a certain point, set the content-length and let the
+     * request object do the rest.
+     */
+    public function testLongStreamToStringBody()
+    {
+        $body = fopen('php://memory', 'r+');
+        fwrite($body, 'abcdefg');
+        fseek($body, 2);
+
+        $message = new MessageMock();
+        $message->setBody($body);
+        $message->setHeader('Content-Length', '4');
+
+        $this->assertEquals(
+            'cdef',
+            $message->getBodyAsString()
+        );
+    }
+
+    /**
+     * Some clients include a content-length header, but the header is empty.
+     * This is definitely broken behavior, but we should support it.
+     */
+    public function testEmptyContentLengthHeader()
+    {
+        $body = fopen('php://memory', 'r+');
+        fwrite($body, 'abcdefg');
+        fseek($body, 2);
+
+        $message = new MessageMock();
+        $message->setBody($body);
+        $message->setHeader('Content-Length', '');
+
+        $this->assertEquals(
+            'cdefg',
+            $message->getBodyAsString()
+        );
+    }
+
+    public function testGetEmptyBodyStream()
+    {
+        $message = new MessageMock();
+        $body = $message->getBodyAsStream();
+
+        $this->assertEquals('', stream_get_contents($body));
+    }
+
+    public function testGetEmptyBodyString()
+    {
+        $message = new MessageMock();
+        $body = $message->getBodyAsString();
+
+        $this->assertEquals('', $body);
+    }
+
+    public function testHeaders()
+    {
+        $message = new MessageMock();
+        $message->setHeader('X-Foo', 'bar');
+
+        // Testing caselessness
+        $this->assertEquals('bar', $message->getHeader('X-Foo'));
+        $this->assertEquals('bar', $message->getHeader('x-fOO'));
+
+        $this->assertTrue(
+            $message->removeHeader('X-FOO')
+        );
+        $this->assertNull($message->getHeader('X-Foo'));
+        $this->assertFalse(
+            $message->removeHeader('X-FOO')
+        );
+    }
+
+    public function testSetHeaders()
+    {
+        $message = new MessageMock();
+
+        $headers = [
+            'X-Foo' => ['1'],
+            'X-Bar' => ['2'],
+        ];
+
+        $message->setHeaders($headers);
+        $this->assertEquals($headers, $message->getHeaders());
+
+        $message->setHeaders([
+            'X-Foo' => ['3', '4'],
+            'X-Bar' => '5',
+        ]);
+
+        $expected = [
+            'X-Foo' => ['3', '4'],
+            'X-Bar' => ['5'],
+        ];
+
+        $this->assertEquals($expected, $message->getHeaders());
+    }
+
+    public function testAddHeaders()
+    {
+        $message = new MessageMock();
+
+        $headers = [
+            'X-Foo' => ['1'],
+            'X-Bar' => ['2'],
+        ];
+
+        $message->addHeaders($headers);
+        $this->assertEquals($headers, $message->getHeaders());
+
+        $message->addHeaders([
+            'X-Foo' => ['3', '4'],
+            'X-Bar' => '5',
+        ]);
+
+        $expected = [
+            'X-Foo' => ['1', '3', '4'],
+            'X-Bar' => ['2', '5'],
+        ];
+
+        $this->assertEquals($expected, $message->getHeaders());
+    }
+
+    public function testSendBody()
+    {
+        $message = new MessageMock();
+
+        // String
+        $message->setBody('foo');
+
+        // Stream
+        $h = fopen('php://memory', 'r+');
+        fwrite($h, 'bar');
+        rewind($h);
+        $message->setBody($h);
+
+        $body = $message->getBody();
+        rewind($body);
+
+        $this->assertEquals('bar', stream_get_contents($body));
+    }
+
+    public function testMultipleHeaders()
+    {
+        $message = new MessageMock();
+        $message->setHeader('a', '1');
+        $message->addHeader('A', '2');
+
+        $this->assertEquals(
+            '1,2',
+            $message->getHeader('A')
+        );
+        $this->assertEquals(
+            '1,2',
+            $message->getHeader('a')
+        );
+
+        $this->assertEquals(
+            ['1', '2'],
+            $message->getHeaderAsArray('a')
+        );
+        $this->assertEquals(
+            ['1', '2'],
+            $message->getHeaderAsArray('A')
+        );
+        $this->assertEquals(
+            [],
+            $message->getHeaderAsArray('B')
+        );
+    }
+
+    public function testHasHeaders()
+    {
+        $message = new MessageMock();
+
+        $this->assertFalse($message->hasHeader('X-Foo'));
+        $message->setHeader('X-Foo', 'Bar');
+        $this->assertTrue($message->hasHeader('X-Foo'));
+    }
+
+    /**
+     * @param string $content
+     *
+     * @return \Closure Returns a callback printing $content to php://output stream
+     */
+    private function createCallback($content)
+    {
+        return function () use ($content) {
+            echo $content;
+        };
+    }
+}
+
+class MessageMock extends Message
+{
+}

lib/vendor/sabre/http/tests/HTTP/NegotiateTest.php

@@ -0,0 +1,135 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class NegotiateTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @dataProvider negotiateData
+     */
+    public function testNegotiate($acceptHeader, $available, $expected)
+    {
+        $this->assertEquals(
+            $expected,
+            negotiateContentType($acceptHeader, $available)
+        );
+    }
+
+    public function negotiateData()
+    {
+        return [
+            [ // simple
+                'application/xml',
+                ['application/xml'],
+                'application/xml',
+            ],
+            [ // no header
+                null,
+                ['application/xml'],
+                'application/xml',
+            ],
+            [ // 2 options
+                'application/json',
+                ['application/xml', 'application/json'],
+                'application/json',
+            ],
+            [ // 2 choices
+                'application/json, application/xml',
+                ['application/xml'],
+                'application/xml',
+            ],
+            [ // quality
+                'application/xml;q=0.2, application/json',
+                ['application/xml', 'application/json'],
+                'application/json',
+            ],
+            [ // wildcard
+                'image/jpeg, image/png, */*',
+                ['application/xml', 'application/json'],
+                'application/xml',
+            ],
+            [ // wildcard + quality
+                'image/jpeg, image/png; q=0.5, */*',
+                ['application/xml', 'application/json', 'image/png'],
+                'application/xml',
+            ],
+            [ // no match
+                'image/jpeg',
+                ['application/xml'],
+                null,
+            ],
+            [ // This is used in sabre/dav
+                'text/vcard; version=4.0',
+                [
+                    // Most often used mime-type. Version 3
+                    'text/x-vcard',
+                    // The correct standard mime-type. Defaults to version 3 as
+                    // well.
+                    'text/vcard',
+                    // vCard 4
+                    'text/vcard; version=4.0',
+                    // vCard 3
+                    'text/vcard; version=3.0',
+                    // jCard
+                    'application/vcard+json',
+                ],
+                'text/vcard; version=4.0',
+            ],
+            [ // rfc7231 example 1
+                'audio/*; q=0.2, audio/basic',
+                [
+                    'audio/pcm',
+                    'audio/basic',
+                ],
+                'audio/basic',
+            ],
+            [ // Lower quality after
+                'audio/pcm; q=0.2, audio/basic; q=0.1',
+                [
+                    'audio/pcm',
+                    'audio/basic',
+                ],
+                'audio/pcm',
+            ],
+            [ // Random parameter, should be ignored
+                'audio/pcm; hello; q=0.2, audio/basic; q=0.1',
+                [
+                    'audio/pcm',
+                    'audio/basic',
+                ],
+                'audio/pcm',
+            ],
+            [ // No whitespace after type, should pick the one that is the most specific.
+                'text/vcard;version=3.0, text/vcard',
+                [
+                    'text/vcard',
+                    'text/vcard; version=3.0',
+                ],
+                'text/vcard; version=3.0',
+            ],
+            [ // Same as last one, but order is different
+                'text/vcard, text/vcard;version=3.0',
+                [
+                    'text/vcard; version=3.0',
+                    'text/vcard',
+                ],
+                'text/vcard; version=3.0',
+            ],
+            [ // Charset should be ignored here.
+                'text/vcard; charset=utf-8; version=3.0, text/vcard',
+                [
+                    'text/vcard',
+                    'text/vcard; version=3.0',
+                ],
+                'text/vcard; version=3.0',
+            ],
+            [ // Undefined offset issue.
+                'text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2',
+                ['application/xml', 'application/json', 'image/png'],
+                'application/xml',
+            ],
+        ];
+    }
+}

lib/vendor/sabre/http/tests/HTTP/RequestDecoratorTest.php

@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class RequestDecoratorTest extends \PHPUnit\Framework\TestCase
+{
+    protected $inner;
+    protected $outer;
+
+    public function setUp(): void
+    {
+        $this->inner = new Request('GET', '/');
+        $this->outer = new RequestDecorator($this->inner);
+    }
+
+    public function testMethod()
+    {
+        $this->outer->setMethod('FOO');
+        $this->assertEquals('FOO', $this->inner->getMethod());
+        $this->assertEquals('FOO', $this->outer->getMethod());
+    }
+
+    public function testUrl()
+    {
+        $this->outer->setUrl('/foo');
+        $this->assertEquals('/foo', $this->inner->getUrl());
+        $this->assertEquals('/foo', $this->outer->getUrl());
+    }
+
+    public function testAbsoluteUrl()
+    {
+        $this->outer->setAbsoluteUrl('http://example.org/foo');
+        $this->assertEquals('http://example.org/foo', $this->inner->getAbsoluteUrl());
+        $this->assertEquals('http://example.org/foo', $this->outer->getAbsoluteUrl());
+    }
+
+    public function testBaseUrl()
+    {
+        $this->outer->setBaseUrl('/foo');
+        $this->assertEquals('/foo', $this->inner->getBaseUrl());
+        $this->assertEquals('/foo', $this->outer->getBaseUrl());
+    }
+
+    public function testPath()
+    {
+        $this->outer->setBaseUrl('/foo');
+        $this->outer->setUrl('/foo/bar');
+        $this->assertEquals('bar', $this->inner->getPath());
+        $this->assertEquals('bar', $this->outer->getPath());
+    }
+
+    public function testQueryParams()
+    {
+        $this->outer->setUrl('/foo?a=b&c=d&e');
+        $expected = [
+            'a' => 'b',
+            'c' => 'd',
+            'e' => null,
+        ];
+
+        $this->assertEquals($expected, $this->inner->getQueryParameters());
+        $this->assertEquals($expected, $this->outer->getQueryParameters());
+    }
+
+    public function testPostData()
+    {
+        $postData = [
+            'a' => 'b',
+            'c' => 'd',
+            'e' => null,
+        ];
+
+        $this->outer->setPostData($postData);
+        $this->assertEquals($postData, $this->inner->getPostData());
+        $this->assertEquals($postData, $this->outer->getPostData());
+    }
+
+    public function testServerData()
+    {
+        $serverData = [
+            'HTTPS' => 'On',
+        ];
+
+        $this->outer->setRawServerData($serverData);
+        $this->assertEquals('On', $this->inner->getRawServerValue('HTTPS'));
+        $this->assertEquals('On', $this->outer->getRawServerValue('HTTPS'));
+
+        $this->assertNull($this->inner->getRawServerValue('FOO'));
+        $this->assertNull($this->outer->getRawServerValue('FOO'));
+    }
+
+    public function testToString()
+    {
+        $this->inner->setMethod('POST');
+        $this->inner->setUrl('/foo/bar/');
+        $this->inner->setBody('foo');
+        $this->inner->setHeader('foo', 'bar');
+
+        $this->assertEquals((string) $this->inner, (string) $this->outer);
+    }
+}

lib/vendor/sabre/http/tests/HTTP/RequestTest.php

@@ -0,0 +1,151 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class RequestTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstruct()
+    {
+        $request = new Request('GET', '/foo', [
+            'User-Agent' => 'Evert',
+        ]);
+        $this->assertEquals('GET', $request->getMethod());
+        $this->assertEquals('/foo', $request->getUrl());
+        $this->assertEquals([
+            'User-Agent' => ['Evert'],
+        ], $request->getHeaders());
+    }
+
+    public function testGetQueryParameters()
+    {
+        $request = new Request('GET', '/foo?a=b&c&d=e');
+        $this->assertEquals([
+            'a' => 'b',
+            'c' => null,
+            'd' => 'e',
+        ], $request->getQueryParameters());
+    }
+
+    public function testGetQueryParametersNoData()
+    {
+        $request = new Request('GET', '/foo');
+        $this->assertEquals([], $request->getQueryParameters());
+    }
+
+    /**
+     * @backupGlobals
+     */
+    public function testCreateFromPHPRequest()
+    {
+        $_SERVER['REQUEST_URI'] = '/';
+        $_SERVER['REQUEST_METHOD'] = 'PUT';
+
+        $request = Sapi::getRequest();
+        $this->assertEquals('PUT', $request->getMethod());
+    }
+
+    public function testGetAbsoluteUrl()
+    {
+        $r = new Request('GET', '/foo', [
+            'Host' => 'sabredav.org',
+        ]);
+
+        $this->assertEquals('http://sabredav.org/foo', $r->getAbsoluteUrl());
+
+        $s = [
+            'HTTP_HOST' => 'sabredav.org',
+            'REQUEST_URI' => '/foo',
+            'REQUEST_METHOD' => 'GET',
+            'HTTPS' => 'on',
+        ];
+
+        $r = Sapi::createFromServerArray($s);
+
+        $this->assertEquals('https://sabredav.org/foo', $r->getAbsoluteUrl());
+    }
+
+    public function testGetPostData()
+    {
+        $post = [
+            'bla' => 'foo',
+        ];
+        $r = new Request('POST', '/');
+        $r->setPostData($post);
+        $this->assertEquals($post, $r->getPostData());
+    }
+
+    public function testGetPath()
+    {
+        $request = new Request('GET', '/foo/bar/');
+        $request->setBaseUrl('/foo');
+        $request->setUrl('/foo/bar/');
+
+        $this->assertEquals('bar', $request->getPath());
+    }
+
+    public function testGetPathStrippedQuery()
+    {
+        $request = new Request('GET', '/foo/bar?a=B');
+        $request->setBaseUrl('/foo');
+
+        $this->assertEquals('bar', $request->getPath());
+    }
+
+    public function testGetPathMissingSlash()
+    {
+        $request = new Request('GET', '/foo');
+        $request->setBaseUrl('/foo/');
+
+        $this->assertEquals('', $request->getPath());
+    }
+
+    public function testGetPathOutsideBaseUrl()
+    {
+        $this->expectException('LogicException');
+        $request = new Request('GET', '/bar/');
+        $request->setBaseUrl('/foo/');
+
+        $request->getPath();
+    }
+
+    public function testToString()
+    {
+        $request = new Request('PUT', '/foo/bar', ['Content-Type' => 'text/xml']);
+        $request->setBody('foo');
+
+        $expected = "PUT /foo/bar HTTP/1.1\r\n"
+                  ."Content-Type: text/xml\r\n"
+                  ."\r\n"
+                  .'foo';
+        $this->assertEquals($expected, (string) $request);
+    }
+
+    public function testToStringAuthorization()
+    {
+        $request = new Request('PUT', '/foo/bar', ['Content-Type' => 'text/xml', 'Authorization' => 'Basic foobar']);
+        $request->setBody('foo');
+
+        $expected = "PUT /foo/bar HTTP/1.1\r\n"
+                  ."Content-Type: text/xml\r\n"
+                  ."Authorization: Basic REDACTED\r\n"
+                  ."\r\n"
+                  .'foo';
+        $this->assertEquals($expected, (string) $request);
+    }
+
+    public function testAbsoluteUrlHttp(): void
+    {
+        $request = new Request('GET', 'http://example.com/foo/bar?a=b&c=d');
+        self::assertEquals('http://example.com/foo/bar?a=b&c=d', $request->getAbsoluteUrl());
+    }
+
+    public function testAbsoluteUrlHttpHostPrevalence(): void
+    {
+        $request = new Request('GET', 'http://example.com/foo/bar?a=b&c=d', [
+            'Host' => 'example.org',
+        ]);
+        self::assertEquals('http://example.com/foo/bar?a=b&c=d', $request->getAbsoluteUrl());
+    }
+}

lib/vendor/sabre/http/tests/HTTP/ResponseDecoratorTest.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class ResponseDecoratorTest extends \PHPUnit\Framework\TestCase
+{
+    protected $inner;
+    protected $outer;
+
+    public function setUp(): void
+    {
+        $this->inner = new Response();
+        $this->outer = new ResponseDecorator($this->inner);
+    }
+
+    public function testStatus()
+    {
+        $this->outer->setStatus(201);
+        $this->assertEquals(201, $this->inner->getStatus());
+        $this->assertEquals(201, $this->outer->getStatus());
+        $this->assertEquals('Created', $this->inner->getStatusText());
+        $this->assertEquals('Created', $this->outer->getStatusText());
+    }
+
+    public function testToString()
+    {
+        $this->inner->setStatus(201);
+        $this->inner->setBody('foo');
+        $this->inner->setHeader('foo', 'bar');
+
+        $this->assertEquals((string) $this->inner, (string) $this->outer);
+    }
+}

lib/vendor/sabre/http/tests/HTTP/ResponseTest.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class ResponseTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstruct()
+    {
+        $response = new Response(200, ['Content-Type' => 'text/xml']);
+        $this->assertEquals(200, $response->getStatus());
+        $this->assertEquals('OK', $response->getStatusText());
+    }
+
+    public function testSetStatus()
+    {
+        $response = new Response();
+        $response->setStatus('402 Where\'s my money?');
+        $this->assertEquals(402, $response->getStatus());
+        $this->assertEquals('Where\'s my money?', $response->getStatusText());
+    }
+
+    public function testInvalidStatus()
+    {
+        $this->expectException('InvalidArgumentException');
+        $response = new Response(1000);
+    }
+
+    public function testToString()
+    {
+        $response = new Response(200, ['Content-Type' => 'text/xml']);
+        $response->setBody('foo');
+
+        $expected = "HTTP/1.1 200 OK\r\n"
+                  ."Content-Type: text/xml\r\n"
+                  ."\r\n"
+                  .'foo';
+        $this->assertEquals($expected, (string) $response);
+    }
+}

lib/vendor/sabre/http/tests/HTTP/SapiTest.php

@@ -0,0 +1,326 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class SapiTest extends \PHPUnit\Framework\TestCase
+{
+    public function testConstructFromServerArray()
+    {
+        $request = Sapi::createFromServerArray([
+            'REQUEST_URI' => '/foo',
+            'REQUEST_METHOD' => 'GET',
+            'HTTP_USER_AGENT' => 'Evert',
+            'CONTENT_TYPE' => 'text/xml',
+            'CONTENT_LENGTH' => '400',
+            'SERVER_PROTOCOL' => 'HTTP/1.0',
+        ]);
+
+        $this->assertEquals('GET', $request->getMethod());
+        $this->assertEquals('/foo', $request->getUrl());
+        $this->assertEquals([
+            'User-Agent' => ['Evert'],
+            'Content-Type' => ['text/xml'],
+            'Content-Length' => ['400'],
+        ], $request->getHeaders());
+
+        $this->assertEquals('1.0', $request->getHttpVersion());
+
+        $this->assertEquals('400', $request->getRawServerValue('CONTENT_LENGTH'));
+        $this->assertNull($request->getRawServerValue('FOO'));
+    }
+
+    public function testConstructFromServerArrayOnNullUrl()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('The _SERVER array must have a REQUEST_URI key');
+
+        $request = Sapi::createFromServerArray([
+            'REQUEST_METHOD' => 'GET',
+            'HTTP_USER_AGENT' => 'Evert',
+            'CONTENT_TYPE' => 'text/xml',
+            'CONTENT_LENGTH' => '400',
+            'SERVER_PROTOCOL' => 'HTTP/1.0',
+        ]);
+    }
+
+    public function testConstructFromServerArrayOnNullMethod()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('The _SERVER array must have a REQUEST_METHOD key');
+
+        $request = Sapi::createFromServerArray([
+            'REQUEST_URI' => '/foo',
+            'HTTP_USER_AGENT' => 'Evert',
+            'CONTENT_TYPE' => 'text/xml',
+            'CONTENT_LENGTH' => '400',
+            'SERVER_PROTOCOL' => 'HTTP/1.0',
+        ]);
+    }
+
+    public function testConstructPHPAuth()
+    {
+        $request = Sapi::createFromServerArray([
+            'REQUEST_URI' => '/foo',
+            'REQUEST_METHOD' => 'GET',
+            'PHP_AUTH_USER' => 'user',
+            'PHP_AUTH_PW' => 'pass',
+        ]);
+
+        $this->assertEquals('GET', $request->getMethod());
+        $this->assertEquals('/foo', $request->getUrl());
+        $this->assertEquals([
+            'Authorization' => ['Basic '.base64_encode('user:pass')],
+        ], $request->getHeaders());
+    }
+
+    public function testConstructPHPAuthDigest()
+    {
+        $request = Sapi::createFromServerArray([
+            'REQUEST_URI' => '/foo',
+            'REQUEST_METHOD' => 'GET',
+            'PHP_AUTH_DIGEST' => 'blabla',
+        ]);
+
+        $this->assertEquals('GET', $request->getMethod());
+        $this->assertEquals('/foo', $request->getUrl());
+        $this->assertEquals([
+            'Authorization' => ['Digest blabla'],
+        ], $request->getHeaders());
+    }
+
+    public function testConstructRedirectAuth()
+    {
+        $request = Sapi::createFromServerArray([
+            'REQUEST_URI' => '/foo',
+            'REQUEST_METHOD' => 'GET',
+            'REDIRECT_HTTP_AUTHORIZATION' => 'Basic bla',
+        ]);
+
+        $this->assertEquals('GET', $request->getMethod());
+        $this->assertEquals('/foo', $request->getUrl());
+        $this->assertEquals([
+            'Authorization' => ['Basic bla'],
+        ], $request->getHeaders());
+    }
+
+    /**
+     * @runInSeparateProcess
+     *
+     * Unfortunately we have no way of testing if the HTTP response code got
+     * changed.
+     */
+    public function testSend()
+    {
+        if (!function_exists('xdebug_get_headers')) {
+            $this->markTestSkipped('XDebug needs to be installed for this test to run');
+        }
+
+        $response = new Response(204, ['Content-Type' => 'text/xml;charset=UTF-8']);
+
+        // Second Content-Type header. Normally this doesn't make sense.
+        $response->addHeader('Content-Type', 'application/xml');
+        $response->setBody('foo');
+
+        ob_start();
+
+        Sapi::sendResponse($response);
+        $headers = xdebug_get_headers();
+
+        $result = ob_get_clean();
+        header_remove();
+
+        $this->assertEquals(
+            [
+                'Content-Type: text/xml;charset=UTF-8',
+                'Content-Type: application/xml',
+            ],
+            $headers
+        );
+
+        $this->assertEquals('foo', $result);
+    }
+
+    /**
+     * @runInSeparateProcess
+     *
+     * @depends testSend
+     */
+    public function testSendLimitedByContentLengthString()
+    {
+        $response = new Response(200);
+
+        $response->addHeader('Content-Length', 19);
+        $response->setBody('Send this sentence. Ignore this one.');
+
+        ob_start();
+
+        Sapi::sendResponse($response);
+
+        $result = ob_get_clean();
+        header_remove();
+
+        $this->assertEquals('Send this sentence.', $result);
+    }
+
+    /**
+     * Tests whether http2 is recognized.
+     */
+    public function testRecognizeHttp2()
+    {
+        $request = Sapi::createFromServerArray([
+            'SERVER_PROTOCOL' => 'HTTP/2.0',
+            'REQUEST_URI' => 'bla',
+            'REQUEST_METHOD' => 'GET',
+        ]);
+
+        $this->assertEquals('2.0', $request->getHttpVersion());
+    }
+
+    /**
+     * @runInSeparateProcess
+     *
+     * @depends testSend
+     */
+    public function testSendLimitedByContentLengthStream()
+    {
+        $response = new Response(200, ['Content-Length' => 19]);
+
+        $body = fopen('php://memory', 'w');
+        fwrite($body, 'Ignore this. Send this sentence. Ignore this too.');
+        rewind($body);
+        fread($body, 13);
+        $response->setBody($body);
+
+        ob_start();
+
+        Sapi::sendResponse($response);
+
+        $result = ob_get_clean();
+        header_remove();
+
+        $this->assertEquals('Send this sentence.', $result);
+    }
+
+    /**
+     * @runInSeparateProcess
+     *
+     * @depends testSend
+     *
+     * @dataProvider sendContentRangeStreamData
+     */
+    public function testSendContentRangeStream($ignoreAtStart, $sendText, $multiplier, $ignoreAtEnd, $contentLength)
+    {
+        $partial = str_repeat($sendText, $multiplier);
+        $ignoreAtStartLength = strlen($ignoreAtStart);
+        $ignoreAtEndLength = strlen($ignoreAtEnd);
+        $body = fopen('php://memory', 'w');
+        if (!$contentLength) {
+            $contentLength = strlen($partial);
+        }
+        fwrite($body, $ignoreAtStart);
+        fwrite($body, $partial);
+        if ($ignoreAtEndLength > 0) {
+            fwrite($body, $ignoreAtEnd);
+        }
+        rewind($body);
+        if ($ignoreAtStartLength > 0) {
+            fread($body, $ignoreAtStartLength);
+        }
+        $response = new Response(200, [
+            'Content-Length' => $contentLength,
+            'Content-Range' => sprintf('bytes %d-%d/%d', $ignoreAtStartLength, $ignoreAtStartLength + strlen($partial) - 1, $ignoreAtStartLength + strlen($partial) + $ignoreAtEndLength),
+        ]);
+        $response->setBody($body);
+
+        ob_start();
+
+        Sapi::sendResponse($response);
+
+        $result = ob_get_clean();
+        header_remove();
+
+        $this->assertEquals($partial, $result);
+    }
+
+    public function sendContentRangeStreamData()
+    {
+        return [
+            ['Ignore this. ', 'Send this.', 10, ' Ignore this at end.'],
+            ['Ignore this. ', 'Send this.', 1000, ' Ignore this at end.'],
+            ['Ignore this. ', 'S', 4096, ' Ignore this at end.'],
+            ['I', 'S', 4094, 'E'],
+            ['', 'Send this.', 10, ' Ignore this at end.'],
+            ['', 'Send this.', 1000, ' Ignore this at end.'],
+            ['', 'S', 4096, ' Ignore this at end.'],
+            ['', 'S', 4094, 'En'],
+            ['Ignore this. ', 'Send this.', 10, ''],
+            ['Ignore this. ', 'Send this.', 1000, ''],
+            ['Ignore this. ', 'S', 4096, ''],
+            ['Ig', 'S', 4094, ''],
+
+            // Provide contentLength greater than the bytes remaining in the stream.
+            ['Ignore this. ', 'Send this.', 10, '', 101],
+            ['Ignore this. ', 'Send this.', 1000, '', 10001],
+            ['Ignore this. ', 'S', 4096, '', 5000000],
+            ['I', 'S', 4094, '', 8095],
+            // Provide contentLength equal to the bytes remaining in the stream.
+            ['', 'Send this.', 10, '', 100],
+            ['Ignore this. ', 'Send this.', 1000, '', 10000],
+        ];
+    }
+
+    /**
+     * @runInSeparateProcess
+     *
+     * @depends testSend
+     */
+    public function testSendWorksWithCallbackAsBody()
+    {
+        $response = new Response(200, [], function () {
+            $fd = fopen('php://output', 'r+');
+            fwrite($fd, 'foo');
+            fclose($fd);
+        });
+
+        ob_start();
+
+        Sapi::sendResponse($response);
+
+        $result = ob_get_clean();
+
+        $this->assertEquals('foo', $result);
+    }
+
+    public function testSendConnectionAborted(): void
+    {
+        $baseUrl = getenv('BASEURL');
+        if (!$baseUrl) {
+            $this->markTestSkipped('Set an environment value BASEURL to continue');
+        }
+
+        $url = rtrim($baseUrl, '/').'/connection_aborted.php';
+        $chunk_size = 4 * 1024 * 1024;
+        $fetch_size = 6 * 1024 * 1024;
+
+        $stream = fopen($url, 'r');
+        $size = 0;
+
+        while ($size <= $fetch_size) {
+            $temp = fread($stream, 8192);
+            if (false === $temp) {
+                break;
+            }
+            $size += strlen($temp);
+        }
+
+        fclose($stream);
+
+        sleep(5);
+
+        $bytes_read = file_get_contents(sys_get_temp_dir().'/dummy_stream_read_counter');
+        $this->assertEquals($chunk_size * 2, $bytes_read);
+        $this->assertGreaterThanOrEqual($fetch_size, $bytes_read);
+    }
+}

lib/vendor/sabre/http/tests/HTTP/URLUtilTest.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sabre\HTTP;
+
+class URLUtilTest extends \PHPUnit\Framework\TestCase
+{
+    public function testEncodePath()
+    {
+        $str = '';
+        for ($i = 0; $i < 128; ++$i) {
+            $str .= chr($i);
+        }
+
+        $newStr = encodePath($str);
+
+        $this->assertEquals(
+            '%00%01%02%03%04%05%06%07%08%09%0a%0b%0c%0d%0e%0f'.
+            '%10%11%12%13%14%15%16%17%18%19%1a%1b%1c%1d%1e%1f'.
+            '%20%21%22%23%24%25%26%27()%2a%2b%2c-./'.
+            '0123456789:%3b%3c%3d%3e%3f'.
+            '@ABCDEFGHIJKLMNO'.
+            'PQRSTUVWXYZ%5b%5c%5d%5e_'.
+            '%60abcdefghijklmno'.
+            'pqrstuvwxyz%7b%7c%7d~%7f',
+            $newStr);
+
+        $this->assertEquals($str, decodePath($newStr));
+    }
+
+    public function testEncodePathSegment()
+    {
+        $str = '';
+        for ($i = 0; $i < 128; ++$i) {
+            $str .= chr($i);
+        }
+
+        $newStr = encodePathSegment($str);
+
+        // Note: almost exactly the same as the last test, with the
+        // exception of the encoding of / (ascii code 2f)
+        $this->assertEquals(
+            '%00%01%02%03%04%05%06%07%08%09%0a%0b%0c%0d%0e%0f'.
+            '%10%11%12%13%14%15%16%17%18%19%1a%1b%1c%1d%1e%1f'.
+            '%20%21%22%23%24%25%26%27()%2a%2b%2c-.%2f'.
+            '0123456789:%3b%3c%3d%3e%3f'.
+            '@ABCDEFGHIJKLMNO'.
+            'PQRSTUVWXYZ%5b%5c%5d%5e_'.
+            '%60abcdefghijklmno'.
+            'pqrstuvwxyz%7b%7c%7d~%7f',
+            $newStr);
+
+        $this->assertEquals($str, decodePathSegment($newStr));
+    }
+
+    public function testDecode()
+    {
+        $str = 'Hello%20Test+Test2.txt';
+        $newStr = decodePath($str);
+        $this->assertEquals('Hello Test+Test2.txt', $newStr);
+    }
+
+    /**
+     * @depends testDecode
+     */
+    public function testDecodeUmlaut()
+    {
+        $str = 'Hello%C3%BC.txt';
+        $newStr = decodePath($str);
+        $this->assertEquals("Hello\xC3\xBC.txt", $newStr);
+    }
+
+    /**
+     * @depends testDecode
+     */
+    public function testDecodeSlavicWords()
+    {
+        $words = [
+            'Ostroměr',
+            'Šventaragis',
+            'Świętopełk',
+            'Dušan',
+            'Živko',
+        ];
+        foreach ($words as $word) {
+            $str = rawurlencode($word);
+            $newStr = decodePath($str);
+            $this->assertEquals($word, $newStr);
+        }
+    }
+
+    /**
+     * @depends testDecodeUmlaut
+     */
+    public function testDecodeUmlautLatin1()
+    {
+        $str = 'Hello%FC.txt';
+        $newStr = decodePath($str);
+        $this->assertEquals("Hello\xC3\xBC.txt", $newStr);
+    }
+
+    /**
+     * This testcase was sent by a bug reporter.
+     *
+     * @depends testDecode
+     */
+    public function testDecodeAccentsWindows7()
+    {
+        $str = '/webdav/%C3%A0fo%C3%B3';
+        $newStr = decodePath($str);
+        $this->assertEquals(strtolower($str), encodePath($newStr));
+    }
+}

lib/vendor/sabre/http/tests/bootstrap.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+date_default_timezone_set('UTC');
+
+ini_set('error_reporting', (string) (E_ALL | E_STRICT | E_DEPRECATED));
+
+// Composer autoloader
+if (file_exists(__DIR__.'/../vendor/autoload.php')) {
+    include __DIR__.'/../vendor/autoload.php';
+} else {
+    // We may be running as a dependency inside some other repo.
+    // So we are probably in vendor/sabre/http/tests of that repo.
+    // Go up 3 levels to find autoload.php
+    include __DIR__.'/../../../autoload.php';
+}

lib/vendor/sabre/http/tests/phpunit.xml

@@ -0,0 +1,27 @@
+<phpunit
+  colors="true"
+  beStrictAboutCoversAnnotation="true"
+  beStrictAboutOutputDuringTests="true"
+  beStrictAboutTestsThatDoNotTestAnything="true"
+  beStrictAboutTodoAnnotatedTests="true"
+  bootstrap="bootstrap.php"
+  convertErrorsToExceptions="true"
+  convertNoticesToExceptions="true"
+  convertWarningsToExceptions="true"
+  >
+  <testsuites>
+    <testsuite name="Sabre_HTTP">
+      <directory>HTTP/</directory>
+    </testsuite>
+  </testsuites>
+
+  <filter>
+    <whitelist addUncoveredFilesFromWhitelist="true">
+       <directory suffix=".php">../lib/</directory>
+    </whitelist>
+  </filter>
+
+  <php>
+    <env name="BASEURL" value="http://localhost:8000"/>
+  </php>
+</phpunit>

lib/vendor/sabre/http/tests/www/bar.php

@@ -0,0 +1,5 @@
+<?php
+
+header('X-Test: Bar');
+?>
+bar

lib/vendor/sabre/http/tests/www/connection_aborted.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+use Sabre\HTTP;
+
+include '../bootstrap.php';
+
+class DummyStream
+{
+    private $position;
+
+    public function stream_open(string $path, string $mode, int $options, ?string &$opened_path): bool
+    {
+        $this->position = 0;
+
+        return true;
+    }
+
+    public function stream_read(int $count): string
+    {
+        $this->position += $count;
+
+        return random_bytes($count);
+    }
+
+    public function stream_tell(): int
+    {
+        return $this->position;
+    }
+
+    public function stream_eof(): bool
+    {
+        return $this->position > 25 * 1024 * 1024;
+    }
+
+    public function stream_close(): void
+    {
+        file_put_contents(sys_get_temp_dir().'/dummy_stream_read_counter', $this->position);
+    }
+}
+
+/*
+ * The DummyStream wrapper has two functions:
+ * - Provide dummy data.
+ * - Count how many bytes have been read.
+ */
+stream_wrapper_register('dummy', DummyStream::class);
+
+/*
+ * Overwrite default connection handling.
+ * The default behaviour is however for your script to be aborted when the remote client disconnects.
+ *
+ * Nextcloud/ownCloud set ignore_user_abort(true) on purpose to work around
+ * some edge cases where the default behavior would end a script too early.
+ *
+ * https://github.com/owncloud/core/issues/22370
+ * https://github.com/owncloud/core/pull/26775
+ */
+ignore_user_abort(true);
+
+$body = fopen('dummy://hello', 'r');
+
+$response = new HTTP\Response();
+$response->setStatus(200);
+$response->addHeader('Content-Length', 25 * 1024 * 1024);
+$response->setBody($body);
+
+HTTP\Sapi::sendResponse($response);

lib/vendor/sabre/http/tests/www/foo

@@ -0,0 +1 @@
+foo

lib/vendor/sabre/http/tests/www/large.php

@@ -0,0 +1,7 @@
+<?php
+
+$data = str_repeat('x', 32 * 1024 * 1024);
+header('Content-Length: '.strlen($data));
+header('Content-Type: text/plain');
+
+echo $data;