Ruby WebDriver get performance log

gistfile1.txt

require 'selenium-webdriver'
require 'pp'

class Inspector
  attr_accessor :driver

  def open url
    @network_events = {}
    @driver = Selenium::WebDriver::Driver.for :remote, url: "http://localhost:4444/wd/hub", desired_capabilities: capabilities
    at_exit do
      @driver.quit
    end
    @driver.navigate.to url
  end

  def capabilities
    caps = Selenium::WebDriver::Remote::Capabilities.chrome
    caps['loggingPrefs'] = { 'performance' => 'ALL' }
    caps['chromeOptions'] = {
      'perfLoggingPrefs': {
        'enableNetwork': true,
        'enablePage': true
      }
    }
    caps
  end

  def network_requests
    driver.manage.logs.get(:performance).each do |perf|
      message = JSON.parse(perf.message)
      method = message['message']['method']

      if method =~ /Page/
        page(message)
      elsif method =~ /Network/
        network(message)
      end
    end
  end

  def network_events
    @network_events
  end

  def network(message)
    params = message['message']['params']

    @network_events["#{ params['requestId'] }"] ||= []
    @network_events["#{ params['requestId'] }"]  << message

    #$stdout.puts "* : #{ message }"
    #$stdout.puts "* : #{ params['requestId'] }"

    # Network.requestWillBeSent
    # Network.dataReceived
    # Network.responseReceived
    # Network.loadingFinished
  end

  def page(message)
    #$stdout.puts "* :#{ message['message']['method'] }"
  end
end



inspector = Inspector.new
inspector.open "http://reddit.com/"
inspector.network_requests

puts PP.pp(inspector.network_events, ''), "\n\n"