Question

我一直在使用Dashing框架上的仪表板，我目前正在尝试使用一个小爬虫来收集Jenkins-CI上的特定数据，并将其传递给Number小部件。这是抓取工具（它只是一个存根，它计算存根html页面上＆＃34; p＆＃34;元素的数量）：

require 'nokogiri'
require 'open-uri'

class ActiveBuilds

      def initialize()
          @jenkins_page = nil
          @build_count = nil
      end

      # !STUB! Gets the jenkins page to parse to XML on Nokogiri
      @jenkins_page = Nokogiri::HTML(open("http://localhost:80"))

      # !STUB! Counts the number of 'p' items found on the page
      @build_count = @jenkins_page.css("p").length

      # !STUB! Returns the amount of active builds
      def amountOfActiveBuilds
          return @build_count
      end
end

HTML页面是

并且不是必需的参考：

＆＃13;

<!DOCTYPE html>
<html>
  <head>
	<meta charset="UTF-8">
    <title>Number Stub | Project</title>
  </head>
  <body>
    <h1>Test</h1>
    <ul>
	   <!-- Count these -->
       <li> <div> <p>Item 1 </div>
       <li> <div> <p>Item 2 </div>
       <li> <div> <p>Item 3 </div>
       <li> <div> <p>Item 4 </div>
       <li> <div> <p>Item 5 </div>
           <!-- Stop counting -->
       <li> <div> Item 6 </div>
       <li> <div> Item 7 </div>
     </ul>
   </body>
</html>

＆＃13;

现在，来自破坏，修改的jobs / sample.rb文件（唯一重要的是构建/评估的东西）：

require './ActiveBuilds.rb'

active_builds = ActiveBuilds.new
current_valuation = active_builds.amountOfActiveBuilds
current_karma = 0

SCHEDULER.every '2s' do
  last_valuation = current_valuation
  last_karma     = current_karma
  current_karma  = rand(200000)

  send_event('valuation', { current: current_valuation, last: last_valuation })
  send_event('karma', { current: current_karma, last: last_karma })
  send_event('synergy', { value: rand(100) })

end

问题是，在我开始工作之前，它会在localhost上获取页面，计算＆＃34; p＆＃34;将项目打印并打印在文件上，然后划线文件将读取并正确显示，但它不会更新仪表板上的值，除非我重新启动它，这违背了此框架的目的

现在出错：

尝试编译sample.rb（破折号文件）时：

$ ruby sample.rb
sample.rb:12:in '<main>': uninitialized constant SCHEDULER (NameError)

尝试运行虚拟服务器时：

$ dashing start
/home/yadayada/.rvm/gems/ruby-2.2.0/gems/backports-3.6.4/lib/backports/std_lib.rb:9:in 'require': cannot load such file -- nokogiri (LoadError)
from /home/yadayada/.rvm/gems/ruby-2.2.0/gems/backports-3.6.4/lib/backports/std_lib.rb:9:in 'require_with_backports'
from /home/yadayada/Desktop/dashing/project/jobs/ActiveBuilds.rb:2:in '<top (required)>'
(...)

我还可以发布Number小部件的HTML / CSS / CoffeScript组件，但我相信问题出在sample.rb上，而Number小部件完全是默认的。

如果代码不够清楚，我想要做的就是获取本地主页，计算＆＃34; p＆＃34;项目（后来当我切换到jenkins时，它将成为活动版本，因为我正在处理证书而没有切换），然后将其发送到sample.rb，这将获得数据并在仪表板显示屏上每2秒更新一次。

欢迎任何建议！提前谢谢！

Answer 1

找到解决方案：

卸载/重新安装nokogiri gem（不带sudo）将我的爬虫放入lib文件夹并在作业中需要它在工作本身，将所有内容放入SCHEDULER函数中，如下所示：

＆＃13;

# This job provides the data of the amount of active builds on Jenkins using the Number widget

# Updates every 2 seconds
SCHEDULER.every '2s' do

  # Invokes the crawlers from the lib folder
  Dir[File.dirname(__FILE__) + '/lib/*rb'].each { |file| require file }
  
  # Create the ActiveBuilds reference
  builds = ActiveBuilds.new
  
  # Attributes the amount of active builds to the current valuation
  current_valuation = builds.get_amount_of_active_builds
  
  # Pass the current valuation to the last to present the change percentage on the dashboard
  last_valuation = current_valuation

  # Sends the values to the Number widget (widget id is valuation)
  send_event('valuation', { current: current_valuation, last: last_valuation })
end

＆＃13;

Dashing（Ruby）Nokogiri LoadError

1 个答案: