A sample notification server example for jdmorlan.github.io blog post.

notification-server.rb

require 'sinatra'
require 'json'
require 'httparty'

subscriptions = []

get '/subscriptions' do
  subscriptions.to_json
end

post '/subscribe' do
  json_body = JSON.parse(request.body.read)
  subscriptions << json_body['url']

  data = {"event_payload" => "test-data", "event_type" => "test-event"}.to_json
  trigger_event(subscriptions, data)
end

def trigger_event(subscriptions, data)
  options = {
    :body => data,
    :headers => {'Content-Type' => 'application/json'}
  }

  subscriptions.each do |url|
    HTTParty.post(url, options)
  end
end