Lighttpd

{{{
#!rst =================
FastCGI Internals =================

---------------
Module: fastcgi
---------------

.. contents:: Table of Contents

Description ===========

States
------

The FastCGI state machine currently consists of six states,
each of which is visited in turn as a connection is processed.

:init:
prepare for a connection
:connect:
wait for a connection
:prepwrite:
build the request
:write:
write the request to the network
:read:
read the response from network and push it to the write queue
:close:
terminate the connection

Delays
------

The connect, write, and read states may need to wait for an fdevent.
The delays are represented by loops in the state diagram below.

}}} {{{
#!graphviz
digraph fcgistate {
init -> connect -> prepwrite -> write -> read -> close
write -> write
read -> read
connect -> connect
}
}}}