Use changeOrigin for proxyRequest.

Author: coderarity

lib/node-http-proxy/http-proxy.js

@@ -216,6 +216,14 @@ HttpProxy.prototype.proxyRequest = function (req, res, buffer) {
   outgoing.path    = req.url;
   outgoing.headers = req.headers;
 
+  //
+  // If the changeOrigin option is specified, change the
+  // origin of the host header to the target URL! Please
+  // don't revert this without documenting it!
+  //
+  if(this.changeOrigin)
+    outgoing.headers.host = this.target.host + ':' + this.target.port;
+
   //
   // Open new HTTP request to internal resource with will act
   // as a reverse proxy pass