proxy.coffee

# http forking example

http = require "http"
httpProxy = require "http-proxy"

options =
  forward:
    port: 9001
    host: "localhost"

# proxy on port 8000, forwarding to 9000 and forking to 9001
(httpProxy.createServer 9000, "localhost", options).listen 8000

# http server (backend) on port 9000
(http.createServer (req, res) ->
  res.writeHead 200
  res.end()
  console.log ("#{key}: #{value}" for key, value of req.headers).join "\n"
).listen 9000

# http headers received at backend actual backend
# user-agent: curl/7.21.6 (i686-pc-linux-gnu) libcurl/7.21.6 OpenSSL/1.0.0e zlib/1.2.3.4 libidn/1.22 librtmp/2.3
# host: localhost:8000
# accept: */*
# x-forwarded-for: 127.0.0.1
# x-forwarded-port: 60652
# x-forwarded-proto: http
# connection: keep-alive

# http server (backend) on port 90001
(http.createServer (req, res) ->
  res.writeHead 500
  res.end()
).listen 9001