Chargify Webhook Reflector. Sinatra app I use in dev to get warm fuzzies as the webhooks fly by. Since Chargify will only post to ports 80 or 443 in production, you'll need to run this on a web accessible box on one of those ports. http://docs.chargify.com/webhooks

chargify-webhook-reflector.rb

require 'sinatra'
require 'openssl'
require 'json'

post '/' do
  body = request.body.read
  puts "Time              : #{Time.now}"
  puts "Actual Signature  : #{request.env['HTTP_X_CHARGIFY_WEBHOOK_SIGNATURE_HMAC_SHA_256']}"
  puts "Computed Signature: #{signature(body)}"

  puts "Raw Body"
  puts "--------"
  puts body
  puts "-----------------------------------------------------------------------------"
  puts ""
  puts "JSON"
  puts "----"
  puts JSON.pretty_generate(params)
  puts "-----------------------------------------------------------------------------"
  puts ""
  200
end

def shared_key
  "your Site shared key"
end

def signature(body)
  OpenSSL::HMAC.hexdigest(OpenSSL::Digest::Digest.new('sha256'), shared_key, body)
end