Simple GET Param to CouchDB app

app.coffee

_ = require 'underscore'
express = require 'express'
cradle = require 'cradle'

class Queue
  # Class to store the queue documents to store in Couch.
  constructor: ->
    _.bindAll @, 'flush'

    @reqs = []
    @db = new(cradle.Connection)().database('analytics')
    setInterval @flush, 1000

  # If a value is a string representation of a float,
  # let's convert it.
  transform: (query) ->
    ret = {}
    for name, value of query
      ret[name] = parseFloat(value) or value
    ret

  # Add a request to be flushed
  push: (req) ->
    serialized = _.extend {}, @transform(req.query),
      timestamp: new Date()
      'user-agent': req.headers['user-agent']
      'referer': req.headers['referer']
      ip: req.connection.remoteAddress

    @reqs.push serialized

  # Save pending requests to Couch,
  # outputting to the console so it can be recovered
  # in case something bad happens
  flush: ->
    if @reqs and @reqs.length
      console.log @reqs
      @db.save @reqs
      @reqs = []

queue = new Queue()
app = express.createServer()

app.get '/tracking.gif', (req, res) ->
  res.header 'Cache-Control', 'private, no-cache, proxy-revalidate'
  res.send()
  queue.push(req)

app.listen 3000