on Rails应用程序更新服务器端的进步 [英] Updating server-side progress on Rails application
问题描述
我要上传,然后处理在一个Ruby on Rails应用程序的文件。文件上载通常很短,但服务器端处理可能需要一些时间(超过20秒),所以我想给用户的一些指标 - 的东西比一个毫无意义的处理...屏幕更好。
I want to upload and then process a file in a Ruby on Rails app. The file upload is usually quite short, but the server-side processing can take some time (more than 20 seconds) so I want to give the user some indicator - something better than a meaningless 'processing...' screen.
我尝试使用下面的code视图
I'm trying to use the following code in the view
<%= periodically_call_remote(:url => {:action => 'progress_monitor', :controller => 'files'},
:frequency => '5',
:update => "setProgress('progressBar','5')"
) %>
中的内容:更新参数是我希望运行每5秒的JavaScript
The content of the :update parameter is the javascript I want to run every 5 seconds
和以下code是在文件控制器
and the following code is in the files controller
def progress_monitor
render :text => 'whatever'
end
最终,progress_monitor方法将返回当前进度的整数(%完成)以及将要传递到setProgress'javascript的code(将更新的屏幕元素)
Eventually the progress_monitor method will return the current progress as an integer (% complete) and that will be passed into the 'setProgress' javascript code (that will update an on screen element)
不过,我努力让来自可随后被传递到JavaScript的服务器正确的响应。
However, I'm struggling to get a correct response from from the server that can then be passed into javascript.
谁能帮助,还是我处理这个错误的方式?
Can anyone help, or am I approaching this the wrong way?
有一个后续的问题这一点,我原本更新了这个问题,但更新是十分不同,值得一个新的问题,<一个href="http://stackoverflow.com/questions/126011/monitoring-a-server-side-process-on-rails-application-using-ajax-xmlhtt$p$pquest">here.
There is a follow up question to this, I originally updated this question but the update was sufficiently different to warrant a new question, here.
推荐答案
periodically_call_remote()更新一个div。它不会叫你的JavaScript功能。我不是JavaScript的大师,但解决你的问题,你应该做你自己的XMLHTTP电话。如果我是你,我会使用原型的Ajax请求
periodically_call_remote() updates a div. It won't call your javascript function. I'm no javascript guru, but to solve your problem, you should do your own xmlhttp call. If I were you, I'd use prototype's ajax request
http://www.prototypejs.org/api/ajax/request
和使用JavaScript的setTimeout的或setInterval的做定期轮询
and use javascript's settimeout or setinterval to do the periodic polling
的http://www.elated.com/articles/javascript-timers-with-settimeout-and-setinterval/
希望这有助于COS其实我已经遇到了同样的PRB太=)
hope this helps cos actually I've encountered the same prb too =)
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