diff --git a/lib/application.js b/lib/application.js
index 8b6a78b..02c7df0 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -130,15 +130,19 @@ app.callback = function(){
   if (!this.listeners('error').length) this.on('error', this.onerror);
 
   return function handleRequest(req, res){
-    res.statusCode = 404;
     var ctx = self.createContext(req, res);
-    onFinished(res, ctx.onerror);
-    fn.call(ctx).then(function handleResponse() {
-      respond.call(ctx);
-    }).catch(ctx.onerror);
+    app.handleRequest(ctx, fn);
   }
 };
 
+app.handleRequest = function(ctx, fnMiddleware){
+  ctx.res.statusCode = 404;
+  onFinished(ctx.res, ctx.onerror);
+  fnMiddleware.call(ctx).then(function handleResponse() {
+    respond.call(ctx);
+  }).catch(ctx.onerror);
+};
+
 /**
  * Initialize a new context.
  *