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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
-<HTML>
-<HEAD>
-<TITLE>Apache's Handler Use</TITLE>
-</HEAD>
-
-<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
-<BODY
- BGCOLOR="#FFFFFF"
- TEXT="#000000"
- LINK="#0000FF"
- VLINK="#000080"
- ALINK="#FF0000"
->
-<!--#include virtual="header.html" -->
-<H1 ALIGN="CENTER">Apache's Handler Use</H1>
-
-<H2>What is a Handler</H2>
-
-<P>A "handler" is an internal Apache representation of the action to be
-performed when a file is called. Generally, files have implicit
-handlers, based on the file type. Normally, all files are simply
-served by the server, but certain file typed are "handled"
-separately. For example, you may use a type of
-"application/x-httpd-cgi" to invoke CGI scripts.</P>
-
-<P>Apache 1.1 adds the additional ability to use handlers
-explicitly. Either based on filename extensions or on location, these
-handlers are unrelated to file type. This is advantageous both because
-it is a more elegant solution, but it also allows for both a type
-<STRONG>and</STRONG> a handler to be associated with a file (See also
-<A HREF="mod/mod_mime.html#multipleext">Files with Multiple Extensions</A>)
-
-</P>
-
-<P>Handlers can either be built into the server or to a module, or
-they can be added with the <A
-HREF="mod/mod_actions.html#action">Action</A> directive. The built-in
-handlers in the standard distribution are as follows:</P>
-
-<UL>
-<LI><STRONG>default-handler</STRONG>:
- Send the file using the <CODE>default_handler()</CODE>, which is the
- handler used by default to handle static content.
- (core)
-<LI><STRONG>send-as-is</STRONG>:
- Send file with HTTP headers as is.
- (<A HREF="mod/mod_asis.html">mod_asis</A>)
-<LI><STRONG>cgi-script</STRONG>:
- Treat the file as a CGI script.
- (<A HREF="mod/mod_cgi.html">mod_cgi</A>)
-<LI><STRONG>imap-file</STRONG>:
- Imagemap rule file.
- (<A HREF="mod/mod_imap.html">mod_imap</A>)
-<LI><STRONG>server-info</STRONG>:
- Get the server's configuration information
- (<A HREF="mod/mod_info.html">mod_info</A>)
-<LI><STRONG>server-parsed</STRONG>:
- Parse for server-side includes
- (<A HREF="mod/mod_include.html">mod_include</A>)
-<LI><STRONG>server-status</STRONG>:
- Get the server's status report
- (<A HREF="mod/mod_status.html">mod_status</A>)
-<LI><STRONG>type-map</STRONG>:
- Parse as a type map file for content negotiation
- (<A HREF="mod/mod_negotiation.html">mod_negotiation</A>)
-</UL>
-
-<P>
-
-<H2>Directives</H2>
-<UL>
-<LI><A HREF="#addhandler">AddHandler</A>
-<LI><A HREF="#sethandler">SetHandler</A>
-</UL>
-
-<HR>
-
-<H2><A NAME="addhandler">AddHandler</A></H2>
-
-<A
- HREF="mod/directive-dict.html#Syntax"
- REL="Help"
-><STRONG>Syntax:</STRONG></A> AddHandler <EM>handler-name extension extension...</EM><BR>
-<A
- HREF="mod/directive-dict.html#Context"
- REL="Help"
-><STRONG>Context:</STRONG></A> server config, virtual host, directory, .htaccess<BR>
-<A
- HREF="mod/directive-dict.html#Override"
- REL="Help"
-><STRONG>Override:</STRONG></A> FileInfo<BR>
-<A
- HREF="mod/directive-dict.html#Status"
- REL="Help"
-><STRONG>Status:</STRONG></A> Base<BR>
-<A
- HREF="mod/directive-dict.html#Module"
- REL="Help"
-><STRONG>Module:</STRONG></A> mod_mime<BR>
-<A
- HREF="mod/directive-dict.html#Compatibility"
- REL="Help"
-><STRONG>Compatibility:</STRONG></A> AddHandler is only available in Apache
-1.1 and later<P>
-
-<P>AddHandler maps the filename extensions <EM>extension</EM> to the
-handler <EM>handler-name</EM>. This mapping is added to any already
-in force, overriding any mappings that already exist for the same
-<EM>extension</EM>.
-
-For example, to activate CGI scripts
-with the file extension "<CODE>.cgi</CODE>", you might use:
-<PRE>
- AddHandler cgi-script cgi
-</PRE>
-
-<P>Once that has been put into your srm.conf or httpd.conf file, any
-file containing the "<CODE>.cgi</CODE>" extension will be treated as a
-CGI program.</P>
-
-<P>
-
-<STRONG>See also</STRONG>: <A HREF="mod/mod_mime.html#multipleext">Files with
-multiple extensions</A>
-
-<HR>
-
-<H2><A NAME="sethandler">SetHandler</A></H2>
-
-<A
- HREF="mod/directive-dict.html#Syntax"
- REL="Help"
-><STRONG>Syntax:</STRONG></A> SetHandler <EM>handler-name</EM><BR>
-<A
- HREF="mod/directive-dict.html#Context"
- REL="Help"
-><STRONG>Context:</STRONG></A> directory, .htaccess<BR>
-<A
- HREF="mod/directive-dict.html#Status"
- REL="Help"
-><STRONG>Status:</STRONG></A> Base<BR>
-<A
- HREF="mod/directive-dict.html#Module"
- REL="Help"
-><STRONG>Module:</STRONG></A> mod_mime<BR>
-<A
- HREF="mod/directive-dict.html#Compatibility"
- REL="Help"
-><STRONG>Compatibility:</STRONG></A> SetHandler is only available in Apache
-1.1 and later.<P>
-
-<P>When placed into an <CODE>.htaccess</CODE> file or a
-<CODE>&lt;Directory&gt;</CODE> or <CODE>&lt;Location&gt;</CODE>
-section, this directive forces all matching files to be parsed through
-the handler given by <EM>handler-name</EM>. For example, if you had a
-directory you wanted to be parsed entirely as imagemap rule files,
-regardless of extension, you might put the following into an
-<CODE>.htaccess</CODE> file in that directory:
-<PRE>
- SetHandler imap-file
-</PRE>
-
-<P>Another example: if you wanted to have the server display a status
-report whenever a URL of <CODE>http://servername/status</CODE> was
-called, you might put the following into access.conf:
-<PRE>
- &lt;Location /status&gt;
- SetHandler server-status
- &lt;/Location&gt;
-</PRE>
-<HR>
-
-<H2>Programmer's Note</H2>
-
-<P>In order to implement the handler features, an addition has been
-made to the <A HREF="misc/API.html">Apache API</A> that you may wish to
-make use of. Specifically, a new record has been added to the
-<CODE>request_rec</CODE> structure:</P>
-<PRE>
- char *handler
-</PRE>
-<P>If you wish to have your module engage a handler, you need only to
-set <CODE>r-&gt;handler</CODE> to the name of the handler at any time
-prior to the <CODE>invoke_handler</CODE> stage of the
-request. Handlers are implemented as they were before, albeit using
-the handler name instead of a content type. While it is not
-necessary, the naming convention for handlers is to use a
-dash-separated word, with no slashes, so as to not invade the media
-type name-space.</P>
-
-<!--#include virtual="footer.html" -->
-</BODY>
-</HTML>
-