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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<TITLE>Apache module mod_log_referer</TITLE>
</HEAD>
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BGCOLOR="#FFFFFF"
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LINK="#0000FF"
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<!--#include virtual="header.html" -->
<H1 ALIGN="CENTER">Module mod_log_referer</H1>
This module is contained in the <CODE>mod_log_referer.c</CODE> file, and is not
compiled in by default. It provides for logging of the documents which
reference documents on the server. As of Apache 1.3.5 it is deprecated.
Use <A HREF="mod_log_config.html#customlog-conditional">CustomLog
(conditional)</A> instead.
<H2>Log file format</H2>
The log file contains a separate line for each refer. Each line has the
format
<BLOCKQUOTE><EM>uri</EM> <CODE>-></CODE> <EM>document</EM></BLOCKQUOTE>
where <EM>uri</EM> is the (%-escaped) URI for the document that references
the one requested by the client, and <EM>document</EM> is the (%-decoded)
local URL to the document being referred to.
<H2>Directives</H2>
<UL>
<LI><A HREF="#refererignore">RefererIgnore</A>
<LI><A HREF="#refererlog">RefererLog</A>
</UL>
<HR>
<H2><A NAME="refererignore">RefererIgnore</A></H2>
<!--%plaintext <?INDEX {\tt RefererIgnore} directive> -->
<A
HREF="directive-dict.html#Syntax"
REL="Help"
><STRONG>Syntax:</STRONG></A> RefererIgnore <EM>string string ...</EM><BR>
<A
HREF="directive-dict.html#Context"
REL="Help"
><STRONG>Context:</STRONG></A> server config, virtual host<BR>
<A
HREF="directive-dict.html#Status"
REL="Help"
><STRONG>Status:</STRONG></A> Extension<BR>
<A
HREF="directive-dict.html#Module"
REL="Help"
><STRONG>Module:</STRONG></A> mod_log_referer<P>
The RefererIgnore directive adds to the list of strings to ignore in
Referer headers. If any of the strings in the list is contained in
the Referer header, then no referrer information will be logged for the
request. Example:
<BLOCKQUOTE><CODE>RefererIgnore www.ncsa.uiuc.edu</CODE></BLOCKQUOTE>
This avoids logging references from www.ncsa.uiuc.edu.
<P><HR>
<H2><A NAME="refererlog">RefererLog</A></H2>
<!--%plaintext <?INDEX {\tt RefererLog} directive> -->
<A
HREF="directive-dict.html#Syntax"
REL="Help"
><STRONG>Syntax:</STRONG></A> RefererLog <EM>file-pipe</EM><BR>
<A
HREF="directive-dict.html#Default"
REL="Help"
><STRONG>Default:</STRONG></A> <CODE>RefererLog logs/referer_log</CODE><BR>
<A
HREF="directive-dict.html#Context"
REL="Help"
><STRONG>Context:</STRONG></A> server config, virtual host<BR>
<A
HREF="directive-dict.html#Status"
REL="Help"
><STRONG>Status:</STRONG></A> Extension<BR>
<A
HREF="directive-dict.html#Module"
REL="Help"
><STRONG>Module:</STRONG></A> mod_log_referer<P>
The RefererLog directive sets the name of the file to which the server will
log the Referer header of incoming requests. <EM>File-pipe</EM> is one
of
<DL><DT>A filename
<DD>A filename relative to the <A HREF="core.html#serverroot">ServerRoot</A>.
<DT> `|' followed by a command
<DD>A program to receive the referrer log information on its standard input.
Note the a new program will not be started for a VirtualHost if it inherits
the RefererLog from the main server.
</DL>
<STRONG>Security:</STRONG> if a program is used, then it will be
run under the user who started httpd. This will be root if the server
was started by root; be sure that the program is secure.<P>
<STRONG>Security:</STRONG> See the <A
HREF="../misc/security_tips.html">security tips</A> document for
details on why your security could be compromised if the directory
where logfiles are stored is writable by anyone other than the user
that starts the server.<P>
This directive is provided for compatibility with NCSA 1.4.<P>
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