Node 使用express-http-proxy 做api网关的实现

拷贝代码备忘，filter过滤请求，proxyReqOptDecorator重写请求头，代码如下：

var express = require('express');
var proxy = require('express-http-proxy')

var app = express();

app.all('*', function (req, res, next) {
 res.header("Access-Control-Allow-Origin", req.headers.origin);
 res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
 res.header("Access-Control-Allow-Credentials", "true");
 res.header("Content-Type", "application/json;charset=utf-8");
 if (req.method == 'OPTIONS') {
  res.header('Access-Control-Allow-Headers', req.headers['access-control-request-headers']);
  res.send(200); /*让options请求快速返回*/
 }
 else {
  next();
 }
});

// 代码转发
app.use('/ProxySSO', proxy(req => {
 return req.headers.apiurl
}, {
 filter: function (req, res) {

  // 用户名\系统标识\用户权限
  let { systemName, masterName, powers } = req.tokenDecode;
  const { originalUrl } = req;
  const url = originalUrl.replace('/ProxySSO', '').split('?')[0];

  /**
   * 接口权限检查
   * @param {String} url 接口地址
   * @param {Object} powers rbac权限列表
   * @returns {boolean} 是否有权限
   */
  const checkPowers = (url, powers) => {
    //  do something
  }
  const hasPowers = checkPowers(url, powers);
   // 权限判断
  return hasPowers;
 },
 proxyReqOptDecorator: function(proxyReqOpts, srcReq) {
  // header增加masterName 具体按照自己的需求来
  // proxyReqOpts.headers['masterName'] = srcReq.tokenDecode.masterName;
  return proxyReqOpts;
 }
}));

module.exports = app;

到此这篇关于Node 使用express-http-proxy 做api网关的实现的文章就介绍到这了,更多相关Node api网关内容请搜索易盾网络以前的文章或继续浏览下面的相关文章希望大家以后多多支持易盾网络！