APACHE_1_3_42/htdocs/manual/mod/mod_isapi.html - httpd - Git at Google

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     <h1 align="CENTER">Module mod_isapi</h1>

     <p>This module supports ISAPI Extensions within Apache for
     Windows.</p>

     <p><a href="module-dict.html#Status"
     rel="Help"><strong>Status:</strong></a> Base<br />
      <a href="module-dict.html#SourceFile"
     rel="Help"><strong>Source File:</strong></a> mod_isapi.c<br />
      <a href="module-dict.html#ModuleIdentifier"
     rel="Help"><strong>Module Identifier:</strong></a>
     isapi_module<br />
      <a href="module-dict.html#Compatibility"
     rel="Help"><strong>Compatibility:</strong></a> WIN32 only</p>

     <h2>Summary</h2>

     <p>This module implements the Internet Server extension API. It
     allows Internet Server extensions (<em>e.g.</em> ISAPI .dll
     modules) to be served by Apache for Windows, subject to the
     noted restrictions.</p>

     <p>ISAPI extension modules (.dll files) are written by third
     parties. The Apache Group does not author these modules, so we
     provide no support for them. Please contact the ISAPI's author
     directly if you are experiencing problems running their ISAPI
     extention. <strong>Please <em>do not</em> post such problems to
     Apache's lists or bug reporting pages.</strong></p>

     <h2>Directives</h2>

     <ul>
       <li><a
       href="#isapireadaheadbuffer">ISAPIReadAheadBuffer</a></li>

       <li><a
       href="#isapilognotsupported">ISAPILogNotSupported</a></li>

       <li><a
       href="#isapiappendlogtoerrors">ISAPIAppendLogToErrors</a></li>

       <li><a
       href="#isapiappendlogtoquery">ISAPIAppendLogToQuery</a></li>
     </ul>

     <h2>Usage</h2>

     <p>In the server configuration file, use the AddHandler
     directive to associate ISAPI files with the
     <code>isapi-isa</code> handler, and map it to the with their
     file extensions. To enable any .dll file to be processed as an
     ISAPI extention, edit the httpd.conf file and add the following
     line:</p>
 <pre>
     AddHandler isapi-isa .dll
 </pre>

     <p>ISAPI extensions are governed by the same permissions and
     restrictions as CGI scripts. That is, <code>Options
     ExecCGI</code> must be set for the directory that contains the
     ISAPI .dll file.</p>

     <p>Review the <a href="#notes">Additional Notes</a> and the <a
     href="#journal">Programmer's Journal</a> for additional details
     and clarification of the specific ISAPI support offered by
     mod_isapi.</p>

     <h2><a id="notes" name="notes">Additional Notes</a></h2>

     <p>Apache's ISAPI implementation conforms to all of the ISAPI
     2.0 specification, except for the "Microsoft-specific"
     extensions dealing with asynchronous I/O. Apache's I/O model
     does not allow asynchronous reading and writing in a manner
     that the ISAPI could access. If an ISA tries to access
     unsupported features, including async I/O, a message is placed
     in the error log to help with debugging. Since these messages
     can become a flood, a new directive; <code>ISAPILogNotSupported
     Off</code>, is introduced in Apache 1.3.13.</p>

     <p>Some servers, like Microsoft IIS, load the ISA into the
     server, and keep it loaded until memory usage is too high, or
     specific configuration options are used. Apache currently loads
     and unloads the ISA for each request. This is inefficient, but
     Apache's request model makes this method the only method that
     currently works. Apache 2.0 is expected to support more
     effective loading and caching methods, with more precise
     control over individual ISAPI modules and directories.</p>

     <p>Also, remember that while Apache supports ISAPI Extensions,
     it <strong>does not support ISAPI Filters.</strong> Support for
     filters may be added at a later date, but no support is planned
     at this time.</p>

     <h2><a id="journal" name="journal">Programmer's
     Journal</a></h2>

     <p>If you are programming Apache 1.3 mod_isapi modules, you
     must limit your calls to ServerSupportFunction to the following
     directives:</p>

     <dl>
       <dt>HSE_REQ_SEND_URL_REDIRECT_RESP</dt>

       <dd>Redirect the user to another location.<br />
        This must be a fully qualified URL (e.g.
       http://server/location).</dd>

       <dt>HSE_REQ_SEND_URL</dt>

       <dd>Redirect the user to another location.<br />
        This cannot be a fully qualified URL, you are not allowed to
       pass the protocol or a server name (e.g. simply
       /location).<br />
        This redirection is handled by the server, not the
       browser.<br />
        <strong>Warning:</strong> in their recent documentation,
       Microsoft appears to have abandoned the distinction between
       the two HSE_REQ_SEND_URL functions. Apache continues to treat
       them as two distinct functions with different requirements
       and behaviors.</dd>

       <dt>HSE_REQ_SEND_RESPONSE_HEADER</dt>

       <dd>Apache accepts a response body following the header if it
       follows the blank line (two consecutive newlines) in the
       headers string argument. This body cannot contain NULLs,
       since the headers argument is NULL terminated.</dd>

       <dt>HSE_REQ_DONE_WITH_SESSION</dt>

       <dd>Apache considers this a no-op, since the session will be
       finished when the ISAPI returns from processing.</dd>

       <dt>HSE_REQ_MAP_URL_TO_PATH</dt>

       <dd>Apache will translate a virtual name to a physical
       name.</dd>

       <dt>HSE_APPEND_LOG_PARAMETER <em>Apache 1.3.13 and
       later</em></dt>

       <dd>
         This logged message may be captured in any of the following
         logs:

         <ul>
           <li>in the \"%{isapi-parameter}n\" component in a
           CustomLog directive</li>

           <li>in the %q log component with the
           ISAPIAppendLogToQuery On directive</li>

           <li>in the error log with the ISAPIAppendLogToErrors On
           directive</li>
         </ul>
         The first option, the %{isapi-parameter}n component, is
         always available and prefered.
       </dd>

       <dt>HSE_REQ_IS_KEEP_CONN <em>Apache 1.3.13 and
       later</em></dt>

       <dd>Will return the negotiated Keep-Alive status.</dd>

       <dt>HSE_REQ_SEND_RESPONSE_HEADER_EX <em>Apache 1.3.13 and
       later</em></dt>

       <dd>Will behave as documented, although the fKeepConn flag is
       ignored.</dd>

       <dt>HSE_REQ_IS_CONNECTED <em>Apache 1.3.13 and
       later</em></dt>

       <dd>Will report false if the request has been aborted.</dd>
     </dl>

     <p>Apache returns FALSE to any unsupported call to
     ServerSupportFunction, and sets the GetLastError value to
     ERROR_INVALID_PARAMETER.</p>

     <p>Prior to Apache 1.3.13, ReadClient was a noop, and any
     request with a request body greater than 48kb was rejected by
     mod_isapi. As of Apache 1.3.13, ReadClient now retrieves the
     request body exceeding the initial buffer (defined by
     ISAPIReadAheadBuffer). Based on the ISAPIReadAheadBuffer
     setting (number of bytes to buffer prior to calling the ISAPI
     handler) shorter requests are sent complete to the extension
     when it is invoked. If the request is longer, the ISAPI
     extension must use ReadClient to retrieve the remaining request
     body.</p>

     <p>WriteClient is supported, but only with the HSE_IO_SYNC flag
     or no option flag (value of 0). Any other WriteClient request
     will be rejected with a return value of FALSE, and a
     GetLastError value of ERROR_INVALID_PARAMETER.</p>

     <p>GetServerVariable is supported, although extended server
     variables do not exist (as defined by other servers.) All the
     usual Apache CGI environment variables are available from
     GetServerVariable. As of Apache 1.3.13, the ALL_HTTP and
     ALL_RAW and variables are now available.</p>

     <p>Apache 2.0 mod_isapi may support additional features
     introduced in later versions of the ISAPI specification, as
     well as limited emulation of async I/O and the TransmitFile
     semantics. Apache 2.0 may also support caching of ISAPI .dlls
     for performance. No further enhancements to the Apache 1.3
     mod_isapi features are anticipated.</p>
     <hr />

     <h2><a id="isapireadaheadbuffer"
     name="isapireadaheadbuffer">ISAPIReadAheadBuffer
     directive</a></h2>

     <a href="directive-dict.html#Syntax"
     rel="Help"><strong>Syntax:</strong></a> ISAPIReadAheadBuffer
     <em>size</em><br />
      <a href="directive-dict.html#Default"
     rel="Help"><strong>Default:</strong></a> 49152<br />
      <a href="directive-dict.html#Context"
     rel="Help"><strong>Context:</strong></a> server config<br />
      <a href="directive-dict.html#Override"
     rel="Help"><strong>Override:</strong></a> None<br />
      <a href="directive-dict.html#Status"
     rel="Help"><strong>Status:</strong></a> Base<br />
      <a href="directive-dict.html#Module"
     rel="Help"><strong>Module:</strong></a> mod_isapi<br />
      <a href="module-dict.html#Compatibility"
     rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
     and later, Win32 only

     <p>Defines the maximum size of the Read Ahead Buffer sent to
     ISAPI extentions when they are initally invoked. All remaining
     data must be retrieved using the ReadClient callback; some
     ISAPI extensions may not support the ReadClient function. Refer
     questions to the ISAPI extention's author.</p>
     <hr />

     <h2><a id="isapilognotsupported"
     name="isapilognotsupported">ISAPILogNotSupported
     directive</a></h2>

     <a href="directive-dict.html#Syntax"
     rel="Help"><strong>Syntax:</strong></a> ISAPILogNotSupported
     on|off<br />
      <a href="directive-dict.html#Default"
     rel="Help"><strong>Default:</strong></a> on<br />
      <a href="directive-dict.html#Context"
     rel="Help"><strong>Context:</strong></a> server config<br />
      <a href="directive-dict.html#Override"
     rel="Help"><strong>Override:</strong></a> None<br />
      <a href="directive-dict.html#Status"
     rel="Help"><strong>Status:</strong></a> Base<br />
      <a href="directive-dict.html#Module"
     rel="Help"><strong>Module:</strong></a> mod_isapi<br />
      <a href="module-dict.html#Compatibility"
     rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
     and later, Win32 only

     <p>Logs all requests for unsupported features from ISAPI
     extentions in the server error log. While this should be turned
     off once all desired ISAPI modules are functioning, it defaults
     to on to help administrators track down problems.</p>
     <hr />

     <h2><a id="isapiappendlogtoerrors"
     name="isapiappendlogtoerrors">ISAPIAppendLogToErrors
     directive</a></h2>

     <a href="directive-dict.html#Syntax"
     rel="Help"><strong>Syntax:</strong></a> ISAPIAppendLogToErrors
     on|off<br />
      <a href="directive-dict.html#Default"
     rel="Help"><strong>Default:</strong></a> off<br />
      <a href="directive-dict.html#Context"
     rel="Help"><strong>Context:</strong></a> server config<br />
      <a href="directive-dict.html#Override"
     rel="Help"><strong>Override:</strong></a> None<br />
      <a href="directive-dict.html#Status"
     rel="Help"><strong>Status:</strong></a> Base<br />
      <a href="directive-dict.html#Module"
     rel="Help"><strong>Module:</strong></a> mod_isapi<br />
      <a href="module-dict.html#Compatibility"
     rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
     and later, Win32 only

     <p>Record HSE_APPEND_LOG_PARAMETER requests from ISAPI
     extentions to the server error log.</p>
     <hr />

     <h2><a id="isapiappendlogtoquery"
     name="isapiappendlogtoquery">ISAPIAppendLogToQuery
     directive</a></h2>

     <a href="directive-dict.html#Syntax"
     rel="Help"><strong>Syntax:</strong></a> ISAPIAppendLogToQuery
     on|off<br />
      <a href="directive-dict.html#Default"
     rel="Help"><strong>Default:</strong></a> off<br />
      <a href="directive-dict.html#Context"
     rel="Help"><strong>Context:</strong></a> server config<br />
      <a href="directive-dict.html#Override"
     rel="Help"><strong>Override:</strong></a> None<br />
      <a href="directive-dict.html#Status"
     rel="Help"><strong>Status:</strong></a> Base<br />
      <a href="directive-dict.html#Module"
     rel="Help"><strong>Module:</strong></a> mod_isapi<br />
      <a href="module-dict.html#Compatibility"
     rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
     and later, Win32 only

     <p>Record HSE_APPEND_LOG_PARAMETER requests from ISAPI
     extentions to the query field (appended to the CustomLog %q
     component).</p>

     <p><!--#include virtual="footer.html" -->
     </p>
   </body>
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	<title>Apache module mod_isapi</title>
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	<!--#include virtual="header.html" -->

	<h1 align="CENTER">Module mod_isapi</h1>

	<p>This module supports ISAPI Extensions within Apache for
	Windows.</p>

	<p><a href="module-dict.html#Status"
	rel="Help"><strong>Status:</strong></a> Base<br />
	<a href="module-dict.html#SourceFile"
	rel="Help"><strong>Source File:</strong></a> mod_isapi.c<br />
	<a href="module-dict.html#ModuleIdentifier"
	rel="Help"><strong>Module Identifier:</strong></a>
	isapi_module<br />
	<a href="module-dict.html#Compatibility"
	rel="Help"><strong>Compatibility:</strong></a> WIN32 only</p>

	<h2>Summary</h2>

	<p>This module implements the Internet Server extension API. It
	allows Internet Server extensions (<em>e.g.</em> ISAPI .dll
	modules) to be served by Apache for Windows, subject to the
	noted restrictions.</p>

	<p>ISAPI extension modules (.dll files) are written by third
	parties. The Apache Group does not author these modules, so we
	provide no support for them. Please contact the ISAPI's author
	directly if you are experiencing problems running their ISAPI
	extention. <strong>Please <em>do not</em> post such problems to
	Apache's lists or bug reporting pages.</strong></p>

	<h2>Directives</h2>

	<ul>
	<li><a
	href="#isapireadaheadbuffer">ISAPIReadAheadBuffer</a></li>

	<li><a
	href="#isapilognotsupported">ISAPILogNotSupported</a></li>

	<li><a
	href="#isapiappendlogtoerrors">ISAPIAppendLogToErrors</a></li>

	<li><a
	href="#isapiappendlogtoquery">ISAPIAppendLogToQuery</a></li>
	</ul>

	<h2>Usage</h2>

	<p>In the server configuration file, use the AddHandler
	directive to associate ISAPI files with the
	<code>isapi-isa</code> handler, and map it to the with their
	file extensions. To enable any .dll file to be processed as an
	ISAPI extention, edit the httpd.conf file and add the following
	line:</p>
	<pre>
	AddHandler isapi-isa .dll
	</pre>

	<p>ISAPI extensions are governed by the same permissions and
	restrictions as CGI scripts. That is, <code>Options
	ExecCGI</code> must be set for the directory that contains the
	ISAPI .dll file.</p>

	<p>Review the <a href="#notes">Additional Notes</a> and the <a
	href="#journal">Programmer's Journal</a> for additional details
	and clarification of the specific ISAPI support offered by
	mod_isapi.</p>

	<h2><a id="notes" name="notes">Additional Notes</a></h2>

	<p>Apache's ISAPI implementation conforms to all of the ISAPI
	2.0 specification, except for the "Microsoft-specific"
	extensions dealing with asynchronous I/O. Apache's I/O model
	does not allow asynchronous reading and writing in a manner
	that the ISAPI could access. If an ISA tries to access
	unsupported features, including async I/O, a message is placed
	in the error log to help with debugging. Since these messages
	can become a flood, a new directive; <code>ISAPILogNotSupported
	Off</code>, is introduced in Apache 1.3.13.</p>

	<p>Some servers, like Microsoft IIS, load the ISA into the
	server, and keep it loaded until memory usage is too high, or
	specific configuration options are used. Apache currently loads
	and unloads the ISA for each request. This is inefficient, but
	Apache's request model makes this method the only method that
	currently works. Apache 2.0 is expected to support more
	effective loading and caching methods, with more precise
	control over individual ISAPI modules and directories.</p>

	<p>Also, remember that while Apache supports ISAPI Extensions,
	it <strong>does not support ISAPI Filters.</strong> Support for
	filters may be added at a later date, but no support is planned
	at this time.</p>

	<h2><a id="journal" name="journal">Programmer's
	Journal</a></h2>

	<p>If you are programming Apache 1.3 mod_isapi modules, you
	must limit your calls to ServerSupportFunction to the following
	directives:</p>

	<dl>
	<dt>HSE_REQ_SEND_URL_REDIRECT_RESP</dt>

	<dd>Redirect the user to another location.<br />
	This must be a fully qualified URL (e.g.
	http://server/location).</dd>

	<dt>HSE_REQ_SEND_URL</dt>

	<dd>Redirect the user to another location.<br />
	This cannot be a fully qualified URL, you are not allowed to
	pass the protocol or a server name (e.g. simply
	/location).<br />
	This redirection is handled by the server, not the
	browser.<br />
	<strong>Warning:</strong> in their recent documentation,
	Microsoft appears to have abandoned the distinction between
	the two HSE_REQ_SEND_URL functions. Apache continues to treat
	them as two distinct functions with different requirements
	and behaviors.</dd>

	<dt>HSE_REQ_SEND_RESPONSE_HEADER</dt>

	<dd>Apache accepts a response body following the header if it
	follows the blank line (two consecutive newlines) in the
	headers string argument. This body cannot contain NULLs,
	since the headers argument is NULL terminated.</dd>

	<dt>HSE_REQ_DONE_WITH_SESSION</dt>

	<dd>Apache considers this a no-op, since the session will be
	finished when the ISAPI returns from processing.</dd>

	<dt>HSE_REQ_MAP_URL_TO_PATH</dt>

	<dd>Apache will translate a virtual name to a physical
	name.</dd>

	<dt>HSE_APPEND_LOG_PARAMETER <em>Apache 1.3.13 and
	later</em></dt>

	<dd>
	This logged message may be captured in any of the following
	logs:

	<ul>
	<li>in the \"%{isapi-parameter}n\" component in a
	CustomLog directive</li>

	<li>in the %q log component with the
	ISAPIAppendLogToQuery On directive</li>

	<li>in the error log with the ISAPIAppendLogToErrors On
	directive</li>
	</ul>
	The first option, the %{isapi-parameter}n component, is
	always available and prefered.
	</dd>

	<dt>HSE_REQ_IS_KEEP_CONN <em>Apache 1.3.13 and
	later</em></dt>

	<dd>Will return the negotiated Keep-Alive status.</dd>

	<dt>HSE_REQ_SEND_RESPONSE_HEADER_EX <em>Apache 1.3.13 and
	later</em></dt>

	<dd>Will behave as documented, although the fKeepConn flag is
	ignored.</dd>

	<dt>HSE_REQ_IS_CONNECTED <em>Apache 1.3.13 and
	later</em></dt>

	<dd>Will report false if the request has been aborted.</dd>
	</dl>

	<p>Apache returns FALSE to any unsupported call to
	ServerSupportFunction, and sets the GetLastError value to
	ERROR_INVALID_PARAMETER.</p>

	<p>Prior to Apache 1.3.13, ReadClient was a noop, and any
	request with a request body greater than 48kb was rejected by
	mod_isapi. As of Apache 1.3.13, ReadClient now retrieves the
	request body exceeding the initial buffer (defined by
	ISAPIReadAheadBuffer). Based on the ISAPIReadAheadBuffer
	setting (number of bytes to buffer prior to calling the ISAPI
	handler) shorter requests are sent complete to the extension
	when it is invoked. If the request is longer, the ISAPI
	extension must use ReadClient to retrieve the remaining request
	body.</p>

	<p>WriteClient is supported, but only with the HSE_IO_SYNC flag
	or no option flag (value of 0). Any other WriteClient request
	will be rejected with a return value of FALSE, and a
	GetLastError value of ERROR_INVALID_PARAMETER.</p>

	<p>GetServerVariable is supported, although extended server
	variables do not exist (as defined by other servers.) All the
	usual Apache CGI environment variables are available from
	GetServerVariable. As of Apache 1.3.13, the ALL_HTTP and
	ALL_RAW and variables are now available.</p>

	<p>Apache 2.0 mod_isapi may support additional features
	introduced in later versions of the ISAPI specification, as
	well as limited emulation of async I/O and the TransmitFile
	semantics. Apache 2.0 may also support caching of ISAPI .dlls
	for performance. No further enhancements to the Apache 1.3
	mod_isapi features are anticipated.</p>
	<hr />

	<h2><a id="isapireadaheadbuffer"
	name="isapireadaheadbuffer">ISAPIReadAheadBuffer
	directive</a></h2>

	<a href="directive-dict.html#Syntax"
	rel="Help"><strong>Syntax:</strong></a> ISAPIReadAheadBuffer
	<em>size</em><br />
	<a href="directive-dict.html#Default"
	rel="Help"><strong>Default:</strong></a> 49152<br />
	<a href="directive-dict.html#Context"
	rel="Help"><strong>Context:</strong></a> server config<br />
	<a href="directive-dict.html#Override"
	rel="Help"><strong>Override:</strong></a> None<br />
	<a href="directive-dict.html#Status"
	rel="Help"><strong>Status:</strong></a> Base<br />
	<a href="directive-dict.html#Module"
	rel="Help"><strong>Module:</strong></a> mod_isapi<br />
	<a href="module-dict.html#Compatibility"
	rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
	and later, Win32 only

	<p>Defines the maximum size of the Read Ahead Buffer sent to
	ISAPI extentions when they are initally invoked. All remaining
	data must be retrieved using the ReadClient callback; some
	ISAPI extensions may not support the ReadClient function. Refer
	questions to the ISAPI extention's author.</p>
	<hr />

	<h2><a id="isapilognotsupported"
	name="isapilognotsupported">ISAPILogNotSupported
	directive</a></h2>

	<a href="directive-dict.html#Syntax"
	rel="Help"><strong>Syntax:</strong></a> ISAPILogNotSupported
	on\|off<br />
	<a href="directive-dict.html#Default"
	rel="Help"><strong>Default:</strong></a> on<br />
	<a href="directive-dict.html#Context"
	rel="Help"><strong>Context:</strong></a> server config<br />
	<a href="directive-dict.html#Override"
	rel="Help"><strong>Override:</strong></a> None<br />
	<a href="directive-dict.html#Status"
	rel="Help"><strong>Status:</strong></a> Base<br />
	<a href="directive-dict.html#Module"
	rel="Help"><strong>Module:</strong></a> mod_isapi<br />
	<a href="module-dict.html#Compatibility"
	rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
	and later, Win32 only

	<p>Logs all requests for unsupported features from ISAPI
	extentions in the server error log. While this should be turned
	off once all desired ISAPI modules are functioning, it defaults
	to on to help administrators track down problems.</p>
	<hr />

	<h2><a id="isapiappendlogtoerrors"
	name="isapiappendlogtoerrors">ISAPIAppendLogToErrors
	directive</a></h2>

	<a href="directive-dict.html#Syntax"
	rel="Help"><strong>Syntax:</strong></a> ISAPIAppendLogToErrors
	on\|off<br />
	<a href="directive-dict.html#Default"
	rel="Help"><strong>Default:</strong></a> off<br />
	<a href="directive-dict.html#Context"
	rel="Help"><strong>Context:</strong></a> server config<br />
	<a href="directive-dict.html#Override"
	rel="Help"><strong>Override:</strong></a> None<br />
	<a href="directive-dict.html#Status"
	rel="Help"><strong>Status:</strong></a> Base<br />
	<a href="directive-dict.html#Module"
	rel="Help"><strong>Module:</strong></a> mod_isapi<br />
	<a href="module-dict.html#Compatibility"
	rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
	and later, Win32 only

	<p>Record HSE_APPEND_LOG_PARAMETER requests from ISAPI
	extentions to the server error log.</p>
	<hr />

	<h2><a id="isapiappendlogtoquery"
	name="isapiappendlogtoquery">ISAPIAppendLogToQuery
	directive</a></h2>

	<a href="directive-dict.html#Syntax"
	rel="Help"><strong>Syntax:</strong></a> ISAPIAppendLogToQuery
	on\|off<br />
	<a href="directive-dict.html#Default"
	rel="Help"><strong>Default:</strong></a> off<br />
	<a href="directive-dict.html#Context"
	rel="Help"><strong>Context:</strong></a> server config<br />
	<a href="directive-dict.html#Override"
	rel="Help"><strong>Override:</strong></a> None<br />
	<a href="directive-dict.html#Status"
	rel="Help"><strong>Status:</strong></a> Base<br />
	<a href="directive-dict.html#Module"
	rel="Help"><strong>Module:</strong></a> mod_isapi<br />
	<a href="module-dict.html#Compatibility"
	rel="Help"><strong>Compatibility:</strong></a> Apache 1.3.13
	and later, Win32 only

	<p>Record HSE_APPEND_LOG_PARAMETER requests from ISAPI
	extentions to the query field (appended to the CustomLog %q
	component).</p>

	<p><!--#include virtual="footer.html" -->
	</p>
	</body>
	</html>