On Wed, Aug 8, 2012 at 2:42 PM, 春燕 李 <lcy8...@gmail.com> wrote: > Thanks ! > > In my application, I want to upload image files(such as *.iso) which > are always large, it will take long time before the uploading > completed. During this time, I cannot send out other request on > current page, because a new request will refresh the current page and > make the uploading failed. My aim is that after I click the Upload > button, the file uploading is processed in backend, I can send out > other request simutanously. Firstly , I tried to get the stream, and > write new handler to replace the exsiting processing. But after I > read the source code , I find that the input stream got by django is > activity limited, it only can be read once, once reading is started, > the current page shouldn't be refresh, or else the stream reading will > be failed. > > Is it realizable to uploading backend and simutanously send other > request on current page, and the uploading won't interrupt because of > leaving this page?
Not really. This isn't something that's Django specific -- it's a general problem with web browsers. Web browsers make requests. Background requests are still requests, and they need to happen in the context of a page that is in the foreground. If you change the foreground page, you're going to stop any background activity that is underway. That said, there might be something you can do by breaking the background task into a large number of smaller requests using the HTTP Range header, and then recombining the file on the server side from all the individual chunks. That won't stop the background request from being killed, but it will give you an opportunity to resume the upload on a new page. However, this isn't something where I can point you at a simple page of documentation and say "just call these three lines of Python". What you're proposing isn't a simple task. You're going to need to become very familiar with the HTTP specification, and work out how to put the pieces together yourself. Yours, Russ Magee %-) -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
