[api] add prependPath option to go with path change

Author: jcrugzz

lib/http-proxy.js

@@ -38,6 +38,7 @@ module.exports.createProxyServer =
    *    xfwd   : <true/false, adds x-forward headers>
    *    secure : <true/false, verify SSL certificate>
    *    toProxy: <true/false, explicitly specify if we are proxying to another proxy>
+   *    prependPath: <true/false, Default: true - specify whether you want to prepend the target's path to the proxy path>
    *    localAddress : <Local interface string to bind for outgoing connections>
    *  }
    *

lib/http-proxy/common.js

@@ -61,7 +61,7 @@ common.setupOutgoing = function(outgoing, options, req, forward) {
 
   // the final path is target path + relative path requested by user:
   var target = options[forward || 'target'];
-  var targetPath = target
+  var targetPath = target && options.prependPath !== false
     ? (target.path || '')
     : '';
 

lib/http-proxy/index.js

@@ -89,6 +89,9 @@ httpProxy.createRightProxy = createRightProxy;
 function ProxyServer(options) {
   EE3.call(this);
 
+  options = options || {};
+  options.prependPath = options.prependPath === false ? false : true;
+
   this.web = this.proxyRequest           = createRightProxy('web')(options);
   this.ws  = this.proxyWebsocketRequest  = createRightProxy('ws')(options);
   this.options = options;