Rainbows! + Nginx

Rainbows! + Nginx

[Danny Tran]

I'm trying to run a Rails app that utilizes HTTP streaming with
Rainbows! behind Nginx.
Here is my nginx.conf:https://gist.github.com/a749361acd09b6ae80e2
Despite setting proxy_buffering off; it appears that nginx is still
buffering the output because I do not get a streaming response.  When
I curl the app directly (port 3000) I get a proper streaming response,
but when I curl nginx (which proxies to the Rails app) I do not get a
streaming response.
Any thoughts?
Thanks,Danny
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Re: Rainbows! + Nginx

[Eric Wong]

Danny Tran <danny.tran@digisynd.com> wrote:
> I'm trying to run a Rails app that utilizes HTTP streaming with
> Rainbows! behind Nginx.
> Here is my nginx.conf:https://gist.github.com/a749361acd09b6ae80e2
> Despite setting proxy_buffering off; it appears that nginx is still
> buffering the output because I do not get a streaming response.  When
> I curl the app directly (port 3000) I get a proper streaming response,
> but when I curl nginx (which proxies to the Rails app) I do not get a
> streaming response.
> Any thoughts?

Does your Rack app actually set "X-Accel-Buffering: no" in a response
header?  Your config mentions it:

               # The Rack application may also set "X-Accel-Buffering (yes|no)"
               # in the response headers do disable/enable buffering on a
               # per-response basis.
               proxy_buffering off;
               proxy_pass_header X-Accel-Buffering;

I've mostly forgotten about Rails 3.1 streaming myself :x

I know current nginx versions only send HTTP/1.0 requests to the
backends, which means you need to force the response to stream
via "X-Accel-Buffering: no" since HTTP/1.0 doesn't have chunked
responses,

You should also try using "curl --http1.0" to better simulate nginx
behavior with HTTP/1.0 for testing.
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