Unbuffered requests in a reverse proxy?

[Peter Hultqvist]

Hi

Can nginx be configured to pass through a reverse proxy request before
it has been transmitted completely?

My set-up is a public facing nginx server accepting file uploads passed
to another server via a reverse proxy configuration.
I appears as nginx is reading the entire request before passing it on to
the reverse proxy.

The back end is written to abort early if the file size is not
acceptable depending which account the client is logged in to or abort
immediately if not logged in.
Is there any buffer setting that can be set to 0 so that the request
won't be buffered?