Php server side events

I have several virtual servers operating with php-fpm perfectly fine.
Buffering/caching with Wordpress is great. But now…

I’m trying to implement a new site that uses php for server-side events
to stream live updates to clients. This is, I believe, properly done
with an infinite loop in php that will send events as they occur. The
problem is the events seem to be getting buffered and don’t appear.

If I write the php program to end after sending an event then it works.
If I restart php-fpm then it works - at least for a while.

I’ve tried numerous config options - obviously what I’m trying isn’t
working. Any suggestions?


Daniel

Hello!

On Wed, Aug 26, 2015 at 12:33:48PM -0700, [email protected] wrote:

I’ve tried numerous config options - obviously what I’m trying isn’t
working. Any suggestions?

By default, nginx only starts sending data to a client once it has
a full buffer ready. If you want to stream data immediately,
you have to switch off buffering - either with the fastcgi_buffering
directive, or using the X-Accel-Buffering header in a response.
See http://nginx.org/r/fastcgi_buffering for details.

Additionally, there are some buffering option in PHP. I’m not a
PHP expert, but likely flush() function will help if the problem
is on PHP side, see http://php.net/manual/en/function.flush.php.


Maxim D.
http://nginx.org/

I thought I had done both…not seeing any difference in behaviour.


Daniel

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