渲染带有水豚和无头Chrome的jstree时,无法加载资源:net :: ERR_UNKNOWN_URL_SCHEME

时间:2018-12-27 13:26:59

标签: selenium-webdriver capybara jstree google-chrome-headless

最近,我在我的rspec测试中切换为无头铬。移动之后,与jstree元素交互的所有测试都开始失败。以下是允许重现该错误的最小代码:

Gemfile中有依赖项:

# Gemfile
gem 'capybara', '2.18.0'
gem 'selenium-webdriver', '3.141.0'

这是呈现jstree的简单页面:

# jstree.html

<!doctype html>
<html>
  <head>
    <script src="https://rawgit.com/jquery/jquery/1.12.4/dist/jquery.min.js"></script>
    <script src="https://rawgit.com/vakata/jstree/3.3.7/dist/jstree.min.js"></script>
    <link href="https://rawgit.com/vakata/jstree/3.3.7/dist/themes/default/style.min.css" rel="stylesheet"/>
  </head>

  <body>
    <h1>This is a list:</h1>
    <ul id="tree"></ul>
    <script>
      $('#tree').jstree({
        core: {
          data: [{ "id": 1, "state": {}, "text": "Example", "parent": "#" }]
        }
      });
    </script>
  </body>
</html>

有一个ruby脚本可以用Capybara打开页面并保存页面截图:

# script.rb
require 'capybara'

require 'selenium-webdriver'
Capybara.register_driver :chrome do |app|
  options = ::Selenium::WebDriver::Chrome::Options.new(
    args: %w[headless no-sandbox disable-dev-shm-usage window-size=1280,800])

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

Capybara.default_driver = :chrome
Capybara.app = Rack::File.new File.expand_path('../', __FILE__)

include Capybara::DSL
visit '/jstree.html'
page.save_and_open_screenshot

当我运行bundle exec ruby script.rb并打开屏幕截图时,我看到以下内容:

enter image description here

但是当我在Chrome浏览器中打开jstree.html时,我看到了正常的树:

enter image description here

当我在脚本末尾添加输出浏览器控制台消息时

puts page.driver.browser.manage.logs.get(type)

并重新运行bundle exec ruby script.rb我得到

SEVERE 2018-12-27 16:24:23 +0300: blob:http://127.0.0.1:49346/26695642-8b26-494b-a142-54a515db6512 - Failed to load resource: net::ERR_UNKNOWN_URL_SCHEME

我正在使用chrome v71和chromedriver v2.45

有人知道那里发生了什么吗? 我该如何解决这个问题?

1 个答案:

答案 0 :(得分:4)

很遗憾,Chrome 71以无头模式破坏了blob个URL。如果您是针对Chrome 72 beta运行的,则应予以修复。您可以在木偶问题中看到讨论-https://github.com/GoogleChrome/puppeteer/issues/3463

还请注意,您不需要使用水豚截图的gem来截取屏幕截图-只需致电page.save_and_open_screenshot