node.js forward http request from 'net' server to express - node.js

Question

I'm running the flash socket policy server on port 8484. On the same port I need to receive http requests. I'm thinking about checking whether policy-file was requested (inside the if statement below), and if it wasn't - forwarding the http request to another port where express is running (let's say localhost:3000). How can I obtain that?
// flash socket policy server
var file = '/etc/flashpolicy.xml',
host = 'localhost',
port = 8484,
poli = 'something';
var fsps = require('net').createServer(function (stream) {
stream.setEncoding('utf8');
stream.setTimeout(10000);
stream.on('connect', function () {
console.log('Got connection from ' + stream.remoteAddress + '.');
});
stream.on('data', function (data) {
console.log(data);
var test = /^<policy-file-request\/>/;
if (test.test(data)) {
console.log('Good request. Sending file to ' + stream.remoteAddress + '.')
stream.end(poli + '\0');
} else {
console.log('Not a policy file request ' + stream.remoteAddress + '.');
stream.end('HTTP\0');
// FORWARD REQUEST TO localhost:3000 for example //
}
});
stream.on('end', function () {
stream.end();
});
stream.on('timeout', function () {
console.log('Request from ' + stream.remoteAddress + ' timed out.');
stream.end();
});
});
require('fs').readFile(file, 'utf8', function (err, poli) {
if (err) throw err;
fsps.listen(port, host);
console.log('Flash socket policy server running at ' + host + ':' + port + ' and serving ' + file);
});

Answer 1

I solved this problem a while ago, but have forgotten about the question :) The solution was to create a socket which made it possible to send and retrieve data between http express server and tcp flash policy server.
flash policy server:
var file = process.argv[2] || '/etc/flashpolicy.xml',
host = process.argv[3] || 'localhost',
port = process.argv[4] || 8484,
poli = 'flash policy data\n',
net = require('net'),
http = require('http');
var fsps = net.createServer(function (stream) {
stream.setEncoding('utf8');
stream.on('connect', function () {
console.log('Got connection from ' + stream.remoteAddress + '.');
});
stream.on('data', function (data) {
var test = /^<policy-file-request\/>/;
if (test.test(data)) {
console.log('Good request. Sending file to ' + stream.remoteAddress + '.')
stream.end(poli + '\0');
} else {
console.log('Not a policy file request ' + stream.remoteAddress + '.');
var serviceSocket = new net.Socket();
serviceSocket.connect(3000, 'localhost', function () {
console.log('>>>> Data from 8484 to 3000 >>>>\n', data.toString());
serviceSocket.write(data);
});
serviceSocket.on("data", function (received_data) {
console.log('<<<< Data from 3000 to 8484 to client <<<<\n', received_data.toString());
stream.write(received_data);
});
}
});
stream.on('end', function () {
console.log('tcp server disconnected');
});
stream.on('timeout', function () {
console.log('Request from ' + stream.remoteAddress + ' timed out.');
});
});
require('fs').readFile(file, 'utf8', function (err, poli) {
if (err) throw err;
fsps.listen(port, host);
console.log('Flash socket policy server running at ' + host + ':' + port + ' and serving ' + file);
});
sample express server on localhost:3000:
var express = require('express')
, http = require('http')
, path = require('path')
, app = express();
// all environments
app.set('port', process.env.PORT || 3000);
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', function(req, res){
res.send('Proper HTTP response');
});
app.post('/', function(req, res){
console.log(req.body);
res.send('Proper HTTP response');
});
http.createServer(app).listen(app.get('port'), function(){
console.log('Express HTTP server listening on port ' + app.get('port'));
});