Nodejs实现简单的反向代理

var http = require(‘http‘), httpProxy = require(‘http-proxy‘);

// 新建一个代理 Proxy Server 对象
var proxy = httpProxy.createProxyServer({});

// 捕获异常
proxy.on(‘error‘, function (err, req, res) {
res.writeHead(500, {
‘Content-Type‘: ‘text/plain‘
});
res.end(‘Something went wrong. And we are reporting a custom error message.‘);
});

// 另外新建一个 HTTP 80 端口的服务器，也就是常规 Node 创建 HTTP 服务器的方法。
// 在每次请求中，调用 proxy.web(req, res config) 方法进行请求分发
var server = require(‘http‘).createServer(function(req, res) {
// 在这里可以自定义你的路由分发
var host = req.headers.host, ip = req.headers[‘x-forwarded-for‘] || req.connection.remoteAddress;
console.log("client ip:" + ip + ", host:" + host);

switch(host){

case ‘vmcc.oa.com‘:
proxy.web(req, res, { target: ‘http://vmcc.oa.com‘ });
break;
case ‘vmcdn.oa.com‘:
proxy.web(req, res, { target: ‘http://vmcdn.oa.com‘ });
break;
default:
res.writeHead(200, {
‘Content-Type‘: ‘text/plain‘
});
res.end(‘Welcome to my server!‘);
}
});

console.log("listening on port 80")
server.listen(80);