是不是可以用异步来完成？ ajax upload 2012/8/8 Russell Keith-Magee <russ...@keith-magee.com>
> 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. > > -- 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.
