Merge branch '4.4' into 5.4

* 4.4:
  Update ExceptionInterface.php
  Flush with flush() after ob_end_flush()
  [HttpFoundation] Fix deleteFileAfterSend on client abortion
  fix sending request to paths containing multiple slashes

Author: derrabus

AbstractBrowser.php

@@ -658,7 +658,7 @@ protected function getAbsoluteUri(string $uri)
         }
 
         // protocol relative URL
-        if (0 === strpos($uri, '//')) {
+        if ('' !== trim($uri, '/') && str_starts_with($uri, '//')) {
             return parse_url($currentUri, \PHP_URL_SCHEME).':'.$uri;
         }
 

Tests/HttpBrowserTest.php

@@ -180,6 +180,30 @@ public function testMultiPartRequestWithAdditionalParametersOfTheSameName()
         ]);
     }
 
+    /**
+     * @dataProvider forwardSlashesRequestPathProvider
+     */
+    public function testMultipleForwardSlashesRequestPath(string $requestPath)
+    {
+        $client = $this->createMock(HttpClientInterface::class);
+        $client
+            ->expects($this->once())
+            ->method('request')
+            ->with('GET', 'http://localhost'.$requestPath)
+            ->willReturn($this->createMock(ResponseInterface::class));
+        $browser = new HttpBrowser($client);
+        $browser->request('GET', $requestPath);
+    }
+
+    public function forwardSlashesRequestPathProvider()
+    {
+        return [
+            'one slash' => ['/'],
+            'two slashes' => ['//'],
+            'multiple slashes' => ['////'],
+        ];
+    }
+
     private function uploadFile(string $data): string
     {
         $path = tempnam(sys_get_temp_dir(), 'http');