selenium - 无法抑制文件下载的 Firefox 弹出窗口

Question

火狐 - 51.0.1 Selenium - 3.0.5Ubuntu - 16.04(64 位)

这是我的代码:

profile = Selenium::WebDriver::Firefox::Profile.new
profile['browser.download.dir'] = "/tmp/webdriver-downloads"
profile['browser.download.folderList'] = 2
profile['browser.helperApps.neverAsk.saveToDisk'] = "application/pdf"
profile['pdfjs.disabled'] = true

driver = Selenium::WebDriver.for :firefox, :profile => profile
driver.get "https://s3.amazonaws.com/shopsocially-misc/vfs/vfs_test_sample.csv"

请运行上面的代码，然后您会看到弹出窗口。

这是我得到的错误:

Selenium::WebDriver::Error::UnknownError: Failed to decode response from marionette
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/response.rb:69:in `assert_ok'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/response.rb:32:in `initialize'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/common.rb:85:in `new'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/common.rb:85:in `create_response'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/default.rb:107:in `request'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/common.rb:63:in `call'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/w3c_bridge.rb:640:in `raw_execute'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/w3c_bridge.rb:615:in `execute'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/w3c_bridge.rb:126:in `get'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/common/navigation.rb:32:in `to'
    from /var/lib/gems/2.3.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/common/driver.rb:132:in `get'
    from (irb):70
    from /usr/bin/irb:11:in `<main>'

据我尝试，这似乎是我使用的新版本的问题。如果我错了，请纠正我。

Answer 1

MIME 类型让您感到困惑。在您的示例中，您将其设置为“应用程序/pdf”。我已经用 wget 下载文件以确定 mime 类型。

wget https://s3.amazonaws.com/shopsocially-misc/vfs/vfs_test_sample.csv
  ...
  Content-Type: application/octet-stream
Length: 200 [application/octet-stream]
...

内容类型application/octet-stream表示服务器本身doesn't know what kind of file this could be .由于 Selenium 在 browser.helperApps.neverAsk.saveToDisk 中明确定义了它将接受的 MIME 类型，因此这会导致您的失败。

此配置文件将有助于自动下载不同类型的文件，包括application/octet-stream。

# Create a firefox driver that can be passed to HeadlessBrowser.new
def start_driver
  profile = Selenium::WebDriver::Firefox::Profile.new
  profile["browser.download.folderList"] = 2 # This allows downloads to be sent to a custom location
  profile["browser.download.manager.showWhenStarting"] = false
  profile["browser.download.dir"] = `/home/stefan/Downloads` # download to this custom path

   # FILES WILL NOT DOWNLOAD UNLESS THEIR MIME TYPE IS INCLUDED IN THIS LIST!
  profile["browser.helperApps.neverAsk.saveToDisk"] = accepted_mime_types_for_download

  driver = Selenium::WebDriver.for :firefox, :profile => profile
  return driver
end

def accepted_mime_types_for_download
  [ 
    "application/vnd.ms-exceltext/csv",
    "application/csv",
    "application/zip",
    "text/csv",
    "application/x-msexcel",
    "application/excel",
    "application/x-excel",
    "application/vnd.ms-excel",
    "image/png",
    "image/jpeg",
    "text/html",
    "text/plain",
    "application/msword",
    "application/xml",
    "application/octet-stream"
  ].join(",")
end