Simple node.js proxy by piping http server to http request


Question

Trying to learn more about node.js by making a simple http proxy server. The use scenario is simple: user -> proxy -> server -> proxy -> user

The following code works until the last step. Couldn't find way to pipe connector's output back to the user.

#!/usr/bin/env node

var
    url = require('url'),
    http = require('http'),
    acceptor = http.createServer().listen(3128);

acceptor.on('request', function(request, response) {
    console.log('request ' + request.url);
    request.pause();
    var options = url.parse(request.url);
    options.headers = request.headers;
    options.method = request.method;
    options.agent = false;

    var connector = http.request(options);
    request.pipe(connector);
    request.resume();
//  connector.pipe(response); // doesn't work
//  connector.pipe(request); // doesn't work either
});

Using tcpflow I see the incoming request from the browser, then the outgoing proxy request, then the server response back to the proxy. Somehow i couldn't manage to retransmit the response back to the browser.

What is the proper way to implement this logic with pipes?

1
14
11/20/2012 11:39:03 AM

you dont have to 'pause', just 'pipe' is ok

var connector = http.request(options, function(res) {
  res.pipe(response, {end:true});//tell 'response' end=true
});
request.pipe(connector, {end:true});

http request will not finish until you tell it is 'end';

24
8/7/2013 4:43:20 PM

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