I know nginx team are working on it. You can wait for it.
If you are eager for this feature, you could try my patch:
https://github.com/taobao/tengine/pull/91. This patch has been running in
our production servers.
2013/1/11 li zJay <zjay1987@gmail.com>
> Hello!
>
> is it possible that nginx will not buffer the client body before handle
> the request to upstream?
>
> we want to use nginx as a reverse proxy to upload very very big file to
> the upstream, but the default behavior of nginx is to save the whole
> request to the local disk first before handle it to the upstream, which
> make the upstream impossible to process the file on the fly when the file
> is uploading, results in much high request latency and server-side resource
> consumption.
>
> Thanks!
>
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>
--
Weibin Yao
Developer @ Server Platform Team of Taobao
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