Comet with uwsgi and nginx, how to turn off the output buffer?

How can I prevent Nginx from buffering the output of my uwsgi app? For my comet style application I'm using long polling and the requests are now buffered.

I tried to reduce the size of the buffers, but I'm not allowed to put uwsgi_buffer_size and uwsgi_buffers on 0. Also uwsgi_max_temp_file_size does not work (eventhough the manual suggests that).

How can I do this?

Solution 1:

Until a few minutes ago this was not possible. nginx would always buffer all uwsgi and scgi responses, and no configuration would change that.

I have submitted a patch for nginx (and it was accepted) and from the next version on there are two methods to disable buffering for uwsgi requests:

• put uwsgi_buffering off in the nginx config
• send a X-Accel-Buffering 'no' header in the response

uwsgi never buffers the response, so no configuration is required on that end.

Solution 2:

Why don't you use the uwsgi-embedded http-router/load-balancer directly ? It does no-buffering expecially for comet/websockets app. You can use nginx for static files mapping them to another domain.