Cuba.is Demo

README.md

Demo of Rollbar Middleware in Cuba

config.ru

require './hello'

run Cuba

Gemfile

source 'https://rubygems.org'
gem 'cuba'
gem 'rollbar'

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    cuba (3.4.0)
      rack
    multi_json (1.11.2)
    rack (1.6.4)
    rollbar (2.6.1)
      multi_json

PLATFORMS
  ruby

DEPENDENCIES
  cuba
  rollbar

BUNDLED WITH
   1.10.6

hello.rb

require "cuba"
require "cuba/safe"
require "./rollbar_middleware"

Rollbar.configure do |config|
  config.access_token = 'POST_SERVER_ITEM_ACCESS_TOKEN'
  config.disable_monkey_patch = true # Seems like this isn't working for Cuba, so we'll do it manually
end

Cuba.use Rack::Session::Cookie, :secret => "__a_very_long_string__"
Cuba.use RollbarMiddleware
Cuba.plugin Cuba::Safe

Cuba.define do
  on get do
    on "hello" do
      res.write "Hello world!"
    end

    on "error" do
      raise Exception.new("Ops, you bwoke it")
    end
    
    on root do
      res.redirect "/hello"
    end
  end
end

rollbar_middleware.rb

require 'rollbar'
require 'rollbar/exception_reporter'
require 'rollbar/request_data_extractor'

class RollbarMiddleware
  include Rollbar::ExceptionReporter
  include Rollbar::RequestDataExtractor

  def initialize(app)
    @app = app
  end

  def call(env)
    Rollbar.reset_notifier! # If anything was changed by a previous request

    Rollbar.scoped(fetch_scope(env)) do
      begin
        response = @app.call(env)
        err = framework_error(env, response)
        report_exception_to_rollbar(env, err) if err
        return response
      rescue Exception => e
        report_exception_to_rollbar(env, e)
        raise
      end
    end
  end

  def fetch_scope(env)
    {
      :request => proc { extract_request_data_from_rack(env) },
      :person => nil # Change this to change how you report affected user data.
      # Person must have a unique :id property
      # Person may have optional :usename, and :email properties
    }
  end

  def framework_error(env, response)
    false # If Cuba treats exceptions differently (doesn't re-raise them, for instance,
    # instead sticking it in the environemnt or response) return the error here
  end
end