铬无头下载pdf使用水豚和硒

Question

我在我的Ruby on Rails(5.2.1)项目中使用chrome headless with Selenium(3.14.0)和Capybara(3.8.0)，我有一个测试，它可以在无头chrome中工作，但不能在无头chrome中工作。我在谷歌chrome稳定版69上使用的是“--无头”标志。

我已经用下面的设置了我的无头chrome，这适用于所有不下载文件的测试。

download_path="#{Rails.root}/tmp/downloads"

Capybara.register_driver(:headless_chrome) do |app|
  caps = Selenium::WebDriver::Remote::Capabilities.chrome(
    chromeOptions: {
      prefs: {
        'download.default_directory' => download_path,
        "download.extensions_to_open" => "applications/pdf",
        'download.directory_upgrade' => true,
        'download.prompt_for_download' => false,
        'plugins.plugins_disabled' => ["Chrome PDF Viewer"]
      },
      binary: "/opt/google/chrome/google-chrome",
      args: %w[headless disable-gpu window-size=1920,1080]
    }
  )
  Capybara::Selenium::Driver.new(
    app,
    browser: :chrome,
    desired_capabilities: caps
  )
end

@driver = Selenium::WebDriver.for :chrome, options: options

bridge = @driver.send(:bridge)
path = '/session/:session_id/chromium/send_command'
path[':session_id'] = bridge.session_id
bridge.http.call(:post, path, cmd: 'Page.setDownloadBehavior',
                 params: {
                   behavior: 'allow',
                   downloadPath: download_path
                 })

Answer 1

您不再需要手动发送它，它已作为selenium::WebDriver::Chrome::Server#download_path=添加到selenium中。您可以通过Capybara::Selenium::driver实例在驱动程序注册中设置它

...
Capybara::Selenium::Driver.new(
  app,
  browser: :chrome,
  desired_capabilities: caps
).tap { |d| d.browser.download_path = <your download path> }