server.coffee

express   = require 'express'
httpProxy = require 'http-proxy'
sysPath   = require 'path'
config    = require('./config').config

startExpress = (port, base, path, callback) ->
  server = express()
  server.use (request, response, next) ->
    response.header 'Cache-Control', 'no-cache'
    next()
  server.use base, express.static path
  server.all "#{base}/*", (request, response) ->
    response.sendfile sysPath.join path, 'index.html'
  server.listen port, callback
  server

startProxy = (port, routes, defaultRoute, callback) ->
  server = httpProxy.createServer (req, res, proxy) ->
    url = req.url
    target = null
    for route in routes
      if url.match(route.re) isnt null
        target = route
        break
    target = defaultRoute if not target?
    proxy.proxyRequest req, res, {host: target.host, port: target.port}
  server.listen port, callback
  server

exports.startServer = (port, publicPath, callback) ->
  proxyPort   = port
  expressPort = port + 1
  routes      = config.server.routes || {}
  
  defaultRoute =
    host: '127.0.0.1'
    port: expressPort
  startExpress expressPort, config.server.base, publicPath, ->
    startProxy proxyPort, routes, defaultRoute, callback