naive-proxy.coffee

http = require("http")
fs   = require("fs")

port = undefined

readPort = ->
  fs.readFile "port", (err, data) ->
    port = Number(data)
readPort()

fs.watch "port", (event, filename) ->
  readPort()

s = http.createServer (req, res) ->
  console.log "Request received, #{req.method} #{req.url}"
  opts = {
      port: port
    , method: req.method
    , path: req.url
    , headers: req.headers
  }

  proxy_req = http.request opts, (proxy_res) ->
    proxy_res.on "data", (chunk) ->
      for key, value of proxy_res.headers
        res.setHeader(key, value)
      res.write(chunk, "binary")
      res.end()

  proxy_req.on "error", (e) ->
    res.writeHead(500)
    res.end()

  req.on "data", (chunk) ->
    proxy_req.write(chunk, "binary")

  req.on "end", ->
    proxy_req.end()


s.listen(3000, '127.0.0.1')