问题
We want to implement a progress bar for file uploading in one of our Ruby application. This needs to show the exact percentage of the upload. However, despite our best efforts we could not find a way to implement a progress bar that exactly replicate the file upload process.
Can you please help us with this?
回答1:
If your are using Apache and Passenger, you can use the Apache progress bar module.
Screencast: http://www.railsillustrated.com/screencast-file-uploads-progress-in-rails-passenger.html
Apache Module and installation instructions: http://drogomir.com/blog/2008/6/18/upload-progress-bar-with-mod_passenger-and-apache
回答2:
I have used mongrel_upload_progress in the past, but I found that it was quite a complex and delicate solution to the problem. I'd definitly recommend looking towards using passenger thru apache for your production environment, though.
来源：https://stackoverflow.com/questions/1141554/how-to-implement-a-progress-bar-in-ruby