Custom Goliath Rack middleware for Toadhopper / HoptoadNotifier

hoptoad.rb

require 'toadhopper'
require 'em-synchrony/em-http'

class Toadhopper
  def post_document(document, headers={})
    uri = URI.parse(@error_url)
    begin
      response = EM::HttpRequest.new(uri).post({
        :body => document, 
        :head => {'Content-type' => 'text/xml', 'Accept' => 'text/xml, application/xml'}.merge(headers)
      })
      parse_response(response)
    rescue
      Response.new(500, '', ['Timeout error'])
    end
  end
end

module Goliath
  module Rack
    class Hoptoad
      include Goliath::Constants
      
      def initialize(app)
        @app = app
      end
      
      def call(env)
        response = @app.call(env)
        if env[RACK_EXCEPTION]
          Toadhopper('YOUR_API_KEY').post!(env[RACK_EXCEPTION], {:environment => env})
        end
        response
      rescue Exception => e
        Toadhopper('YOUR_API_KEY').post!(env[RACK_EXCEPTION])
      end
    end
  end
end

server.rb

require 'goliath'
require 'hoptoad'  # custom middleware
 
class Server < Goliath::API
  use Goliath::Rack::Hoptoad
 
  def response(env)
    raise 'Notify hoptoad'
 
    [200, {}, "ouch"]
  end
end