[examples] added forward example

examples/forward-proxy.js

@@ -0,0 +1,33 @@
+var http = require('http'),
+    httpProxy = require('../lib/http-proxy');
+
+//
+// Target Http Server
+//
+http.createServer(function (req, res) {
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.write('request successfully proxied to: ' + req.url + '\n' + JSON.stringify(req.headers, true, 2));
+  res.end();
+}).listen(9000);
+console.log("Web server listening on port 9000");
+
+//
+// Target Http Forwarding Server
+//
+http.createServer(function (req, res) {
+  console.log('Receiving forward for: ' + req.url);
+  res.writeHead(200, { 'Content-Type': 'text/plain' });
+  res.write('request successfully forwarded to: ' + req.url + '\n' + JSON.stringify(req.headers, true, 2));
+  res.end();
+}).listen(9001);
+
+//
+// Basic Http Proxy Server
+// Forward example: send requests without care about response
+//
+httpProxy.createServer({
+  target: 'http://localhost:9000',
+  forward: 'http://localhost:9001'
+}).listen(8000)
+console.log("Proxy server listening on port 8000");
+