Nginx Upload Progress Module stops functioning once behind reverse-proxy

[Francis Daly]

On Mon, Feb 16, 2015 at 02:55:51PM -0500, Ben Johnson wrote:

Hi there,

> I've recently compiled nginx-1.7.10 with a third-party upload-progress
> tracking module, which is described at
> http://wiki.nginx.org/HttpUploadProgressModule .

Read the first two paragraphs on that page...

> This module works perfectly well, until I attempt to put the entire
> setup behind a reverse-proxy.

...and draw a picture of what happens when a client sends a 1MB upload
to nginx, and nginx sends it via proxy_pass to an upstream. That should
show you why it fails.

> With this configuration, the upload progress reporting functions
> correctly *only* if I access the reverse-proxy port directly, at
> https://example.com:1337.

Yes.

That's what nginx does.

Why does there need to be an upload_progress module in the first place,
instead of letting the upstream server take care of it?

In this case, you have put your upload_progress module on your upstream
server.

Not going to work. At least until you can use an "unbuffered
upload". Which is not in current nginx. (But is in other things.)

	f
-- 
Francis Daly        francis at daoine.org