Using Node.js to redirect and proxy normal HTTP+WebSocket traffics based on hostnames

Usually I used to use a single server to host several developing or experimental projects. Thus I need a quick solution to forward different request to these services. I had tried to use nginx before. But now I have a easier way to do so.

  1. require modules

  2. config proxy(forward) and redirect mappings (hostname based)

    var proxyOptions = {
    router: {
    "api.testAppX.com" : 'localhost:2041',
    "dev.api.testAppX.com" : 'localhost:2042',
    "www.testAppY.com" : 'localhost:10520',
    "test.oldApps.com" : 'localhost:10520',
    'bc.ryanwu.co' : 'localhost:8888'
    }
    },
    redirectOptions = {
    'olddomain.com' : 'http://newdomain.com/',
    'www.olddomain.com' : 'http://newdomain.com/',
    'blog.olddomain.com' : 'http://newdomain.com/blog/'
    };
  1. Create an instance of node-http-proxy’s RoutingProxy

    var proxy = new httpProxy.RoutingProxy(proxyOptions);
  2. Proxy normal HTTP requests

    var server = http.createServer(function(req, res) {
    var oriHost = req.headers.host,
    //remove port number from original host
    host = oriHost.indexOf(":") ? oriHost.split(':')[0] : oriHost;
    //Check matches of redirect hostnames
    if(_.has(redirectOptions, host)) {
    res.writeHead(301, { //You can use 301, 302 or whatever status code
    'Location': redirectOptions[host],
    'Expires': (new Date()).toGMTString()
    });
    res.end();
    } else {
    //Routing proxy will handle the rest of requests
    proxy.proxyRequest(req, res);
    }
    });
  3. Proxy websocket requests and listen the main service on specific port

    server.on('upgrade', function(req, socket, head) {
    proxy.proxyWebSocketRequest(req, socket, head);
    });
    server.listen(80);

Its very convenient and then I can use a simple forever service to manage this service.