I was trying to implement SSE with Rails using a Puma server.
I followed this post, which guides SSE implementation with partial hijacking. For testing purposes what I did differently is instead of a while loop I loop for definite times for writing to the stream. Locally the implementation works great. Then I deployed it to my staging server which sits behind a Nginx.
In the staging server, the implementation's behavior is a bit different. My observations were as follows in the staging server:
If I was doing sth like:
sse = SSE.new(...)
5. Times do
sse.write(...)
sleep 2
end
then the request remained in a pending state for about 10 seconds. and only then do I get the results altogether which in my opinion is not the correct behavior. The same code is in my local environment; I received a stream every 2 seconds for 5 times.
This got me confused as to why I got the stream altogether and not in a sequential manner in the staging. If anyone with experience could shed some light on this, please??!
I followed the accepted answer for this post for my nginx configuration.
