Class: Kimurai::BrowserBuilder::SeleniumChromeBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/kimurai/browser_builder/selenium_chrome_builder.rb

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, spider:) ⇒ SeleniumChromeBuilder

Returns a new instance of SeleniumChromeBuilder.



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# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 15

def initialize(config, spider:)
  @config = config
  @spider = spider
  @logger = spider.logger
end

Class Attribute Details

.virtual_displayObject

Returns the value of attribute virtual_display.



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# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 10

def virtual_display
  @virtual_display
end

Instance Attribute Details

#loggerObject (readonly)

Returns the value of attribute logger.



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# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 13

def logger
  @logger
end

#spiderObject (readonly)

Returns the value of attribute spider.



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# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 13

def spider
  @spider
end

Instance Method Details

#buildObject



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# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 21

def build
  # Register driver
  Capybara.register_driver :selenium_chrome do |app|
    # Create driver options
    opts = { args: %w[--disable-gpu --no-sandbox --disable-translate] }

    # Provide custom chrome browser path:
    if chrome_path = Kimurai.configuration.selenium_chrome_path
      opts.merge!(binary: chrome_path)
    end

    # See all options here: https://seleniumhq.github.io/selenium/docs/api/rb/Selenium/WebDriver/Chrome/Options.html
    driver_options = Selenium::WebDriver::Chrome::Options.new(opts)

    # Window size
    if size = @config[:window_size].presence
      driver_options.args << "--window-size=#{size.join(',')}"
      logger.debug "BrowserBuilder (selenium_chrome): enabled window_size"
    end

    # Proxy
    if proxy = @config[:proxy].presence
      proxy_string = (proxy.class == Proc ? proxy.call : proxy).strip
      ip, port, type, user, password = proxy_string.split(":")

      if %w(http socks5).include?(type)
        if user.nil? && password.nil?
          driver_options.args << "--proxy-server=#{type}://#{ip}:#{port}"
          logger.debug "BrowserBuilder (selenium_chrome): enabled #{type} proxy, ip: #{ip}, port: #{port}"
        else
          logger.error "BrowserBuilder (selenium_chrome): proxy with authentication doesn't supported by selenium, skipped"
        end
      else
        logger.error "BrowserBuilder (selenium_chrome): wrong type of proxy: #{type}, skipped"
      end
    end

    if proxy_bypass_list = @config[:proxy_bypass_list].presence
      if proxy
        driver_options.args << "--proxy-bypass-list=#{proxy_bypass_list.join(';')}"
        logger.debug "BrowserBuilder (selenium_chrome): enabled proxy_bypass_list"
      else
        logger.error "BrowserBuilder (selenium_chrome): provide `proxy` to set proxy_bypass_list, skipped"
      end
    end

    # SSL
    if @config[:ignore_ssl_errors].present?
      driver_options.args << "--ignore-certificate-errors"
      driver_options.args << "--allow-insecure-localhost"
      logger.debug "BrowserBuilder (selenium_chrome): enabled ignore_ssl_errors"
    end

    # Disable images
    if @config[:disable_images].present?
      driver_options.prefs["profile.managed_default_content_settings.images"] = 2
      logger.debug "BrowserBuilder (selenium_chrome): enabled disable_images"
    end

    # Headers
    if @config[:headers].present?
      logger.warn "BrowserBuilder: (selenium_chrome): custom headers doesn't supported by selenium, skipped"
    end

    if user_agent = @config[:user_agent].presence
      user_agent_string = (user_agent.class == Proc ? user_agent.call : user_agent).strip
      driver_options.args << "--user-agent='#{user_agent_string}'"
      logger.debug "BrowserBuilder (selenium_chrome): enabled custom user_agent"
    end

    # Headless mode
    if ENV["HEADLESS"] != "false"
      if @config[:headless_mode] == :virtual_display
        if Gem::Platform.local.os == "linux"
          unless self.class.virtual_display
            require 'headless'
            self.class.virtual_display = Headless.new(reuse: true, destroy_at_exit: false)
            self.class.virtual_display.start
          end

          logger.debug "BrowserBuilder (selenium_chrome): enabled virtual_display headless_mode"
        else
          logger.error "BrowserBuilder (selenium_chrome): virtual_display headless_mode works only " \
            "on Linux platform. Browser will run in normal mode. Set `native` mode instead."
        end
      else
        driver_options.args << "--headless"
        logger.debug "BrowserBuilder (selenium_chrome): enabled native headless_mode"
      end
    end

    chromedriver_path = Kimurai.configuration.chromedriver_path || "/usr/local/bin/chromedriver"
    Capybara::Selenium::Driver.new(app, browser: :chrome, options: driver_options, driver_path: chromedriver_path)
  end

  # Create browser instance (Capybara session)
  @browser = Capybara::Session.new(:selenium_chrome)
  @browser.spider = spider
  logger.debug "BrowserBuilder (selenium_chrome): created browser instance"

  if @config[:extensions].present?
    logger.error "BrowserBuilder (selenium_chrome): `extensions` option not supported by Selenium, skipped"
  end

  # Cookies
  if cookies = @config[:cookies].presence
    @browser.config.cookies = cookies
    logger.debug "BrowserBuilder (selenium_chrome): enabled custom cookies"
  end

  # Browser instance options
  # skip_request_errors
  if skip_errors = @config[:skip_request_errors].presence
    @browser.config.skip_request_errors = skip_errors
    logger.debug "BrowserBuilder (selenium_chrome): enabled skip_request_errors"
  end

  # retry_request_errors
  if retry_errors = @config[:retry_request_errors].presence
    @browser.config.retry_request_errors = retry_errors
    logger.debug "BrowserBuilder (selenium_chrome): enabled retry_request_errors"
  end

  # restart_if
  if requests_limit = @config.dig(:restart_if, :requests_limit).presence
    @browser.config.restart_if[:requests_limit] = requests_limit
    logger.debug "BrowserBuilder (selenium_chrome): enabled restart_if.requests_limit >= #{requests_limit}"
  end

  if memory_limit = @config.dig(:restart_if, :memory_limit).presence
    @browser.config.restart_if[:memory_limit] = memory_limit
    logger.debug "BrowserBuilder (selenium_chrome): enabled restart_if.memory_limit >= #{memory_limit}"
  end

  # before_request clear_cookies
  if @config.dig(:before_request, :clear_cookies)
    @browser.config.before_request[:clear_cookies] = true
    logger.debug "BrowserBuilder (selenium_chrome): enabled before_request.clear_cookies"
  end

  # before_request clear_and_set_cookies
  if @config.dig(:before_request, :clear_and_set_cookies)
    if cookies = @config[:cookies].presence
      @browser.config.cookies = cookies
      @browser.config.before_request[:clear_and_set_cookies] = true
      logger.debug "BrowserBuilder (selenium_chrome): enabled before_request.clear_and_set_cookies"
    else
      logger.error "BrowserBuilder (selenium_chrome): cookies should be present to enable before_request.clear_and_set_cookies, skipped"
    end
  end

  # before_request change_user_agent
  if @config.dig(:before_request, :change_user_agent)
    logger.error "BrowserBuilder (selenium_chrome): before_request.change_user_agent option not supported by Selenium, skipped"
  end

  # before_request change_proxy
  if @config.dig(:before_request, :change_proxy)
    logger.error "BrowserBuilder (selenium_chrome): before_request.change_proxy option not supported by Selenium, skipped"
  end

  # before_request delay
  if delay = @config.dig(:before_request, :delay).presence
    @browser.config.before_request[:delay] = delay
    logger.debug "BrowserBuilder (selenium_chrome): enabled before_request.delay"
  end

  # encoding
  if encoding = @config[:encoding]
    @browser.config.encoding = encoding
    logger.debug "BrowserBuilder (selenium_chrome): enabled encoding: #{encoding}"
  end

  # return Capybara session instance
  @browser
end