server.js

var sys    = require('sys'),
    http   = require('http'),
    ws     = require("./vendor/ws"),     
    base64 = require('./vendor/base64'), 
    arrays = require('./vendor/arrays'); 
 
// Command line args 
var USERNAME = process.ARGV[2];
var PASSWORD = process.ARGV[3];
var KEYWORD  = process.ARGV[4] || "iphone";
      
if (!USERNAME || !PASSWORD)
  return sys.puts("Usage: node server.js <twitter_username> <twitter_password> <keyword>");
 
// Authentication Headers for Twitter
var headers = [];
var auth = base64.encode(USERNAME + ':' + PASSWORD);
headers['Authorization'] = "Basic " + auth;
headers['Host'] = "stream.twitter.com";

var clients = [];

// Connection to Twitter's streaming API
var twitter = http.createClient(80, "stream.twitter.com");
var request = twitter.request("GET", "/1/statuses/filter.json?track=" + KEYWORD, headers);
request.finish(function (response) {
  response.setBodyEncoding("utf8");
  response.addListener("body", function (chunk) {
    // Send response to all connected clients
    clients.each(function(c) {
      c.send(chunk);
    });
  });
}); 

// Websocket TCP server
ws.createServer(function (websocket) {
  clients.push(websocket);

  websocket.addListener("connect", function (resource) { 
    // emitted after handshake
    sys.debug("connect: " + resource);
  }).addListener("close", function () { 
    // emitted when server or client closes connection
    clients.remove(websocket);
    sys.debug("close");
  });
}).listen(8080);