request #14471: Update to guzzle/psr7 1.6.1

A change is made to the FileUploadController so the implementation
of the TusServer can continue to work. In guzzle/psr7#247 [0] the default
body of the ServerRequest has been switched to a CachingStream which is
nice until you need to use StreamInterface::detach() because only already
cached data will be available. Forcing data to be put in cache is not interesting
here because we want to save as much as data as possible from the client even
if we only got a part of it (resuming the upload will be dealt with the tus protocol).
To avoid that, we now recreate a StreamInterface directly from the php://input resource
when uploading a file with tus.

[0] guzzle/psr7#247

Change-Id: I167bac3958ffdec37d8b4cf8860d70d73befe3a1

src/common/Upload/FileUploadController.php

@@ -22,6 +22,7 @@
 
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Message\StreamFactoryInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Tuleap\Http\HTTPFactoryBuilder;
 use Tuleap\Http\Server\SessionWriteCloseMiddleware;
@@ -49,16 +50,22 @@ final class FileUploadController extends DispatchablePSR15Compatible implements
      * @var UserManager
      */
     private $user_manager;
+    /**
+     * @var StreamFactoryInterface
+     */
+    private $stream_factory;
 
     private function __construct(
         TusServer $tus_server,
         UserManager $user_manager,
+        StreamFactoryInterface $stream_factory,
         EmitterInterface $emitter,
         MiddlewareInterface ...$middleware_stack
     ) {
         parent::__construct($emitter, ...$middleware_stack);
-        $this->tus_server   = $tus_server;
-        $this->user_manager = $user_manager;
+        $this->tus_server     = $tus_server;
+        $this->user_manager   = $user_manager;
+        $this->stream_factory = $stream_factory;
     }
 
     public static function build(TusDataStore $data_store): self
@@ -67,6 +74,7 @@ public static function build(TusDataStore $data_store): self
         return new self(
             new TusServer($response_factory, $data_store),
             UserManager::instance(),
+            HTTPFactoryBuilder::streamFactory(),
             new SapiEmitter(),
             new SessionWriteCloseMiddleware(),
             new RESTCurrentUserMiddleware(\Tuleap\REST\UserManager::build(), new BasicAuthentication()),
@@ -82,6 +90,8 @@ public function handle(ServerRequestInterface $request) : ResponseInterface
             throw new ForbiddenException();
         }
 
-        return $this->tus_server->handle($request);
+        return $this->tus_server->handle(
+            $request->withBody($this->stream_factory->createStreamFromFile('php://input'))
+        );
     }
 }