super proxy pass

gistfile1.txt

var http = require('http'),
    httpProxy = require('http-proxy');
var url = require('url');

var proxy = httpProxy.createProxyServer({});
proxy.on('proxyReq', function(proxyReq, req, res, options) {
  proxyReq.setHeader('host', req.query.host);
});

var server = http.createServer(function(req, res) {
   var rawUrl = req.url.replace('/webproxy', '');
   var _url = url.parse(rawUrl, true);
   var query = _url.query;
   var pathname = _url.pathname;
   var host = pathname.split(/\/+/)[1];
   var realpath = pathname.slice(pathname.indexOf(host) + host.length);
   _url.path = _url.pathname = realpath;

   req.query = query;
   req.query.host = host;
   req.query.pathname = realpath;
   console.log(req.url, rawUrl, realpath);
   req.url = realpath;
   if (query.host) {
     proxy.web(req, res, { target: `http://${query.host}` });
   } else {
     res.statusCode = 404;
     res.end('not speciify server');
   }
});

console.log("listening on port 4000");
server.listen(4000);