Communications Sequence with Upstream

[zhicheng]

> IMHO, Evan Miller's Guide is very limited in
> expressing nginx's full
> power ;) It's just a good old introductory guide
> anyway :) Still many
> thanks to Evan Miller because the guide has helped
> so many people
> including me :)
> 

me too :-)

And I check out the ngx_echo module's source code.
It's very cool for newbie :-)

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,79053,79064#msg-79064