bug #9447 [BrowserKit] fixed protocol-relative url redirection (jong99)

This PR was merged into the 2.2 branch.

Discussion
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[BrowserKit] fixed protocol-relative url redirection

Fixed redirects to protocol relative URLs, e.g. //www.example.org.  Previously the code would treat this as a relative URL.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9445
| License       | MIT
| Doc PR        |

Commits
-------

e8b5c84 bug #9445 [BrowserKit] fixed protocol-relative url redirection

src/Symfony/Component/BrowserKit/Client.php

@@ -484,6 +484,11 @@ protected function getAbsoluteUri($uri)
             );
         }
 
+        // protocol relative URL
+        if (0 === strpos($uri, '//')) {
+            return parse_url($currentUri, PHP_URL_SCHEME).':'.$uri;
+        }
+
         // anchor?
         if (!$uri || '#' == $uri[0]) {
             return preg_replace('/#.*?$/', '', $currentUri).$uri;

src/Symfony/Component/BrowserKit/Tests/ClientTest.php

@@ -327,6 +327,18 @@ public function testFollowRedirect()
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() automatically follows redirects if followRedirects is true');
 
+        $client = new TestClient();
+        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected')));
+        $client->request('GET', 'http://www.example.com/foo/foobar');
+
+        $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows relative URLs');
+
+        $client = new TestClient();
+        $client->setNextResponse(new Response('', 302, array('Location' => '//www.example.org/')));
+        $client->request('GET', 'https://www.example.com/');
+
+        $this->assertEquals('https://www.example.org/', $client->getRequest()->getUri(), '->followRedirect() follows protocol-relative URLs');
+
         $client = new TestClient();
         $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
         $client->request('POST', 'http://www.example.com/foo/foobar', array('name' => 'bar'));