support old (port,host) and (options) style when using middlewares

lib/node-http-proxy.js

@@ -112,6 +112,7 @@ exports.getMaxSockets = function () {
 exports.setMaxSockets = function (value) {
   maxSockets = value;
 };
+
 //
 // stack
 // adapted from https://github.com/creationix/stack
@@ -122,15 +123,16 @@ function stack (middlewares, proxy) {
   middlewares.reverse().forEach(function (layer) {
     
     var child = handle;
+    handle = function (req, res) {
       var next = function (err) {
           if (err) {
             throw err;
+            //TODO: figure out where to send errors.
             //return error(req, res, err); 
           }
           child(req, res);
         }
       next.__proto__ = proxy;
-    handle = function (req, res) {
       layer(req, res, next);
     };
   });
@@ -167,11 +169,6 @@ exports.createServer = function () {
 
   var proxy = new HttpProxy(options);
 
-  if(middleware.length)
-    //handler = callback = middleware.shift()
-  //else if (middleware.length)
-    handler = callback = stack(middleware, proxy);
-
     if (port && host) {
       //
       // If we have a target host and port for the request
@@ -183,6 +180,8 @@ exports.createServer = function () {
           host: host
         });
       }
+      if(middleware.length)
+        middleware.push(handler)
     }
     else if (proxy.proxyTable) {
       //
@@ -192,8 +191,16 @@ exports.createServer = function () {
       handler = function (req, res) {
         proxy.proxyRequest(req, res);
       }
+      if(middleware.length)
+        middleware.push(handler)
     }
-    else if (!handler) {
+
+  if(middleware.length)
+    //handler = callback = middleware.shift()
+    //else if (middleware.length)
+    handler = callback = stack(middleware, proxy);
+
+  if (!handler) {
     //
     // Otherwise this server is improperly configured.
     //