Feature

src/WebKernel.php

@@ -46,6 +46,13 @@ class WebKernel
      */
     protected $responder;
 
+    protected $available = [
+        'text/html',
+        'application/json',
+        'application/xml',
+        'text/csv'
+    ];
+
     /**
      *
      * Constructor.
@@ -91,7 +98,18 @@ public function __get($key)
     public function __invoke()
     {
         $this->router->__invoke();
-        $this->dispatcher->__invoke();
+        $content = $this->dispatcher->__invoke();
+        if (! $this->responder->getResponse()->content->get()) {
+            $media = $this->dispatcher->getRequest()->accept->media
+                ->negotiate($this->available);
+            if (! is_string($content)) {
+                throw new \Exception("Response content must be a string");
+            }
+            $this->responder->getResponse()->content->set($content);
+            $this->responder->getResponse()->content->setType(
+                $media->available->getValue()
+            );
+        }
         $this->responder->__invoke();
     }
 }

src/WebKernelDispatcher.php

@@ -85,7 +85,7 @@ public function __invoke()
         $this->logControllerValue($controller);
         $this->checkForMissingController($controller);
         try {
-            $this->dispatcher->__invoke($this->request->params->get());
+            return $this->dispatcher->__invoke($this->request->params->get());
         } catch (Exception $e) {
             $this->caughtException($e);
         }
@@ -150,4 +150,9 @@ protected function caughtException(Exception $e)
             'exception' => $e,
         ));
     }
+
+    public function getRequest()
+    {
+        return $this->request;
+    }
 }

src/WebKernelResponder.php

@@ -199,4 +199,9 @@ protected function setcookie(
     ) {
         setcookie($name, $value, $expire, $path, $domain, $secure, $httponly);
     }
+
+    public function getResponse()
+    {
+        return $this->response;
+    }
 }