Rack powered counter JSON API. For testing purposes.

rack_counter.ru

require 'rack'
require 'json'

COUNTERS = {}

app = Proc.new do |env|
  req = Rack::Request.new(env)

  COUNTERS[req.path] ||= 0

  if type = req.params["action"]
    case type
    when "increment"
      COUNTERS[req.path] += 1
    when "decrement"
      COUNTERS[req.path] -= 1
    end
  end

  [200, { "Content-Type" => "application/json" }, [ { counter: COUNTERS[req.path] }.to_json ]]
end

run app