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.



15
16
17
18
19
 
# 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_display ⇒ Object

Returns the value of attribute virtual_display.



10
11
12
 
# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 10

def virtual_display
  @virtual_display
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



13
14
15
 
# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 13

def logger
  @logger
end

#spider ⇒ Object (readonly)

Returns the value of attribute spider.



13
14
15
 
# File 'lib/kimurai/browser_builder/selenium_chrome_builder.rb', line 13

def spider
  @spider
end

Instance Method Details

#build ⇒ Object 



21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
 
# 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