Class: Tanakai::BrowserBuilder::SeleniumFirefoxBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/tanakai/browser_builder/selenium_firefox_builder.rb

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, spider:) ⇒ SeleniumFirefoxBuilder

Returns a new instance of SeleniumFirefoxBuilder.



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# File 'lib/tanakai/browser_builder/selenium_firefox_builder.rb', line 15

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

Class Attribute Details

.virtual_display ⇒ Object

Returns the value of attribute virtual_display.



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# File 'lib/tanakai/browser_builder/selenium_firefox_builder.rb', line 10

def virtual_display
  @virtual_display
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/tanakai/browser_builder/selenium_firefox_builder.rb', line 13

def logger
  @logger
end

#spider ⇒ Object (readonly)

Returns the value of attribute spider.



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# File 'lib/tanakai/browser_builder/selenium_firefox_builder.rb', line 13

def spider
  @spider
end

Instance Method Details

#build ⇒ Object 



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# File 'lib/tanakai/browser_builder/selenium_firefox_builder.rb', line 21

def build
  # Register driver
  Capybara.register_driver :selenium_firefox do |app|
    # Create driver options
    driver_options = Selenium::WebDriver::Firefox::Options.new
    driver_options.profile = Selenium::WebDriver::Firefox::Profile.new
    driver_options.profile["browser.link.open_newwindow"] = 3 # open windows in tabs
    driver_options.profile["media.peerconnection.enabled"] = false # disable web rtc

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

      if user.nil? && password.nil?
        driver_options.profile["network.proxy.type"] = 1
        if type == "http"
          driver_options.profile["network.proxy.http"] = ip
          driver_options.profile["network.proxy.http_port"] = port.to_i
          driver_options.profile["network.proxy.ssl"] = ip
          driver_options.profile["network.proxy.ssl_port"] = port.to_i

          logger.debug "BrowserBuilder (selenium_firefox): enabled http proxy, ip: #{ip}, port: #{port}"
        elsif type == "socks5"
          driver_options.profile["network.proxy.socks"] = ip
          driver_options.profile["network.proxy.socks_port"] = port.to_i
          driver_options.profile["network.proxy.socks_version"] = 5
          driver_options.profile["network.proxy.socks_remote_dns"] = true

          logger.debug "BrowserBuilder (selenium_firefox): enabled socks5 proxy, ip: #{ip}, port: #{port}"
        else
          logger.error "BrowserBuilder (selenium_firefox): wrong type of proxy: #{type}, skipped"
        end
      else
        logger.error "BrowserBuilder (selenium_firefox): proxy with authentication doesn't supported by selenium, skipped"
      end
    end

    if proxy_bypass_list = @config[:proxy_bypass_list].presence
      if proxy
        driver_options.profile["network.proxy.no_proxies_on"] = proxy_bypass_list.join(", ")
        logger.debug "BrowserBuilder (selenium_firefox): enabled proxy_bypass_list"
      else
        logger.error "BrowserBuilder (selenium_firefox): provide `proxy` to set proxy_bypass_list, skipped"
      end
    end

    # SSL
    if @config[:ignore_ssl_errors].present?
      driver_options.profile.secure_ssl = false
      driver_options.profile.assume_untrusted_certificate_issuer = true
      logger.debug "BrowserBuilder (selenium_firefox): enabled ignore_ssl_errors"
    end

    # Disable images
    if @config[:disable_images].present?
      driver_options.profile["permissions.default.image"] = 2
      logger.debug "BrowserBuilder (selenium_firefox): enabled disable_images"
    end

    # Headers
    if @config[:headers].present?
      logger.warn "BrowserBuilder: (selenium_firefox): 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.profile["general.useragent.override"] = user_agent_string
      logger.debug "BrowserBuilder (selenium_firefox): 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_firefox): enabled virtual_display headless_mode"
        else
          logger.error "BrowserBuilder (selenium_firefox): 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_firefox): enabled native headless_mode"
      end
    end

    Capybara::Selenium::Driver.new(app, browser: :firefox, options: driver_options)
  end

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

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

  # Window size
  if size = @config[:window_size].presence
    @browser.current_window.resize_to(*size)
    logger.debug "BrowserBuilder (selenium_firefox): enabled window_size"
  end

  # Cookies
  if cookies = @config[:cookies].presence
    @browser.config.cookies = cookies
    logger.debug "BrowserBuilder (selenium_firefox): 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_firefox): 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_firefox): 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_firefox): 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_firefox): 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_firefox): 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_firefox): enabled before_request.clear_and_set_cookies"
    else
      logger.error "BrowserBuilder (selenium_firefox): 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_firefox): 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_firefox): 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_firefox): enabled before_request.delay"
  end

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

  # return Capybara session instance
  @browser
end