50-AdvancedTopics.md

Advanced Topics

Implementing a reverse proxy

You can use Zappa (actually, Express) and mikeal's request module to easily implement a reverse-proxy. In this example we send any request that comes in to another web server running on the same host.

request = require 'request'

make_proxy = (proxy_base) ->
  return ->
    proxy = request
      uri: proxy_base + @request.url
      method: @request.method
      headers: @request.headers
      jar: false
      followRedirect: false
      timeout: 30000
    @request.pipe proxy
    proxy.pipe @response
    return

require('zappajs').run ->

  my_proxy = make_proxy 'http://127.0.0.1:5984'
  my_urls = /^\/(_session|_users|_uuids|_utils|provisioning|billing|cdr|u.*)($|\/)/
  @get  my_urls, my_proxy
  @post my_urls, my_proxy
  @put  my_urls, my_proxy
  @del  my_urls, my_proxy