Lighting@刘迎光

最近在做微服务相关产品，其中需要有API网关相关产品，虽然早有研究过API网关产品TYK，但是感觉其太重，想起之前研究开源BI产品saiku的时候，记得其有NodeJS的代理代码，于是看了下，颇有启发，略微修改了一些，拿出来跟大家分享下，虽然简单，不可用于生产，但是对于学习还是不错的

package.json

{
  "name": "SmartHttpProxy",
  "description": "An simplest Http Proxy",
  "version": "0.0.1",
  "author": "liuyg@liuyingguang.cn",
  "license": {
    "type": "Apache License Version 2"
  },
  "main": "server.js",
  "scripts": {
    "start": "node server.js 8088 127.0.0.1 80 / "
  },
  "dependencies": {
    "express": "~4.13.4"
  }
}

server.js

/*
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either e