[FrameworkBundle] removed the possibility to pass a non-scalar attrib…

…utes when calling render() to make the call works with or without a reverse proxy (closes #2941)

CHANGELOG-2.1.md

@@ -26,6 +26,7 @@ To get the diff between two versions, go to https://github.com/symfony/symfony/c
 
 ### FrameworkBundle
 
+ * [BC BREAK] removed the possibility to pass a non-scalar attributes when calling render() to make the call works with or without a reverse proxy
  * added a router:match command
  * added kernel.event_subscriber tag
  * added a way to create relative symlinks when running assets:install command (--relative option)

src/Symfony/Bundle/FrameworkBundle/HttpKernel.php

@@ -105,6 +105,14 @@ public function render($controller, array $options = array())
             'comment'       => '',
         ), $options);
 
+        // enforce all attribute values to be scalars to be sure that the same
+        // render() call will work with or without a reverse proxy
+        foreach ($options['attributes'] as $key => $value) {
+            if (!is_scalar($value)) {
+                throw new \InvalidArgumentException(sprintf('Unable to render the "%s" controller as the "%s" attribute is not a scalar.', $controller, $key));
+            }
+        }
+
         if (!is_array($options['alt'])) {
             $options['alt'] = array($options['alt']);
         }

src/Symfony/Bundle/FrameworkBundle/Tests/HttpKernelTest.php

@@ -219,4 +219,17 @@ public function testExceptionInSubRequestsDoesNotMangleOutputBuffers()
 
         $this->assertEquals('Foo', ob_get_clean());
     }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     */
+    public function testRenderOnlyAllowScalarAttributes()
+    {
+        $dispatcher = new EventDispatcher();
+        $resolver = $this->getMock('Symfony\\Component\\HttpKernel\\Controller\\ControllerResolverInterface');
+        $container = $this->getMock('Symfony\Component\DependencyInjection\ContainerInterface');
+        $kernel = new HttpKernel($dispatcher, $container, $resolver);
+
+        $kernel->render('/', array('attributes' => array('foo' => new \stdClass())));
+    }
 }