A simple class to wrap the response of the application in an JSONP callback function.

Author: tomvo

Middleware/Jsonp.php

@@ -0,0 +1,30 @@
+<?php
+/**
+ * JSONP Middleware Class for the Slim Framework
+ *
+ * Simple class to wrap the response of the application in an JSONP callback function.
+ * The class is triggered when a get parameter of callback is found	
+ * 
+ * @author  Tom van Oorschot <[email protected]>
+ * @since  17-12-2012
+ */
+class JSONPMiddleware extends \Slim\Middleware
+{
+    public function call()
+    {
+    	$callback = $this->app->request()->get('callback');
+
+    	//Fetch the body first
+		$this->next->call();
+
+		//If the JSONP callback parameter is set then wrap the response body in the original
+		//callback string.
+    	if(!empty($callback)){
+    		//The response becomes a javascript response
+    		$this->app->contentType('application/javascript');
+
+    		$jsonp_response = htmlspecialchars($callback) . "(" .$this->app->response()->body() . ")";
+    		$this->app->response()->body($jsonp_response);
+    	}
+   	}
+}