HTTP Request filter module

[forum_id]

@agentzh, thank you. As you suggested, I went through the ngx_lua code.
Since I am new to nginx, my understanding was not so good, but I want to
write it in few points, 
1) Lua handler receives request 
2) Forwards request to Lua interpreter 
3) Send Lua response back to user.

Let me know if my understanding itself is wrong. Give me some simple
pointers to understand, because I need to start with my module as soon
as possible. Thank you once again.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,217739,217810#msg-217810