Log responses in Rails in development environment

application.rb

# In config/application.rb

class ResponseLogger
  def initialize(app)
    @app = app
  end

  def call(env)
    headers = env.select {|k,v| k.start_with? 'HTTP_'}
    .map {|pair| [pair[0].sub(/^HTTP_/, ''), pair[1]].join(": ")}
    .sort

    request_params = env['rack.input'].read

    puts "Request: #{env["REQUEST_METHOD"]} #{env["PATH_INFO"]} #{headers} #{request_params}"

    @app.call(env).tap do |response|
      status, headers, body = *response

      puts "Response Status: #{status}"
      puts "Response Headers: #{headers}"
      puts "Response Body: #{body.join("\n)}"
    end
  end
end


module Shyftplan
  class Application < Rails::Application
    config.middleware.use(ResponseLogger);
  end
end