Accesslog

Module: mod_accesslog

Table of Contents

• Description
• Options
  • Response Header

Description

CLF like by default, flexible like apache

Options

accesslog.use-syslog

send the accesslog to syslog

Default: disabled

accesslog.filename

name of the file where the accesslog should be written to if syslog is not used.

if the name starts with a '|' the rest of the name is taken as the name of a process which will be spawned and will get the output

e.g.:

accesslog.filename = "/var/log/lighttpd.log"

$HTTP["host"] == "mail.example.org" {
  accesslog.filename = "|/usr/bin/cronolog"
}

if you have multiple workers on 1.4.x (now, the current version) and want all access logs to be written (without that, only one worker will write logs), use the accesslog.filename = "|/usr/sbin/cronolog.. (as a temporary solution)

Default: disabled

accesslog.format

the format of the logfile

Option	Description
%%	a percent sign
%h	name or address of remote-host
%l	ident name (not supported)
%u	authenticated user
%t	timestamp for the request-start
%r	request-line
%s	status code
%b	bytes sent for the body
%i	HTTP-header field
%a	remote address
%A	local address
%B	same as %b
%C	cookie field (not supported)
%D	time used in ms (not supported)
%e	environment (not supported)
%f	physical filename
%H	request protocol (HTTP/1.0, ...)
%m	request method (GET, POST, ...)
%n	(not supported)
%o	response header
%p	server port
%P	(not supported)
%q	query string
%T	time used in seconds
%U	request URL
%v	server-name
%V	HTTP request host name
%X	connection status
%I	bytes incomming
%O	bytes outgoing

If %s is written %>s or %<s the < and the > are ignored. They are supported for compatibility with apache.

%h will always return the IP address of the host, never the name. This makes it equivalent to %a, which is not implemented.

%a, %A, %{name}C, %D and %e are all unimplemented as of 1.4.18 and 1.5.0-r1922

%i and %o expect the name of the field which should be written in curly brackets.

e.g.:

accesslog.format = "%h %l %u %t \"%r\" %b %>s \"%{Referer}i\" \"%{User-Agent}i\""

Default: CLF compatible output. Format from 1.4.13 source: "%h %V %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" The difference between Apache's CLF is the second field changes from %l to %V.

Response Header

The accesslog module provides a special way to log content from the application in a accesslog file. It can be used to log the session id into a logfile.

If you want to log it into the accesslog just specify the field-name within a %{...}o like

accesslog.format = "%h %l %u %t \"%r\" %b %>s \"%{Referer}i\" \"%{User-Agent}i\" \"%{X-LIGHTTPD-SID}o\""

The prefix X-LIGHTTPD- is special as every response header starting with this prefix is assumed to be special for lighttpd and won't be sent out to the client.

An example the use this functionality is provided below:

<?php

session_start();

header("X-LIGHTTPD-SID: ".session_id());

?>
TEST