mirror of
https://github.com/apache/httpd.git
synced 2025-04-18 22:24:07 +03:00
01055edef2
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1907148 13f79535-47bb-0310-9956-ffa450edef68
371 lines
24 KiB
XML
371 lines
24 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
||
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
|
||
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
|
||
<!--
|
||
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
||
This file is generated from xml source: DO NOT EDIT
|
||
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
|
||
-->
|
||
<title>mod_isapi - Apache HTTP Server Version 2.5</title>
|
||
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
|
||
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
|
||
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
|
||
<script src="../style/scripts/prettify.min.js" type="text/javascript">
|
||
</script>
|
||
|
||
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
|
||
<body>
|
||
<div id="page-header">
|
||
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
|
||
<p class="apache">Apache HTTP Server Version 2.5</p>
|
||
<img alt="" src="../images/feather.png" /></div>
|
||
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
|
||
<div id="path">
|
||
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
|
||
<div id="page-content">
|
||
<div id="preamble"><h1>Apache Module mod_isapi</h1>
|
||
<div class="toplang">
|
||
<p><span>Available Languages: </span><a href="../en/mod/mod_isapi.html" title="English"> en </a> |
|
||
<a href="../fr/mod/mod_isapi.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
|
||
<a href="../ko/mod/mod_isapi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
|
||
</div>
|
||
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>ISAPI Extensions within Apache for Windows</td></tr>
|
||
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>isapi_module</td></tr>
|
||
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_isapi.c</td></tr>
|
||
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Win32 only</td></tr></table>
|
||
<h3>Summary</h3>
|
||
|
||
<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
|
||
extension. <strong>Please <em>do not</em> post such problems to
|
||
Apache's lists or bug reporting pages.</strong></p>
|
||
</div>
|
||
<div id="quickview"><h3>Topics</h3>
|
||
<ul id="topics">
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#usage">Usage</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#notes">Additional Notes</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#journal">Programmer's Journal</a></li>
|
||
</ul><h3 class="directives">Directives</h3>
|
||
<ul id="toc">
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapiappendlogtoerrors">ISAPIAppendLogToErrors</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapiappendlogtoquery">ISAPIAppendLogToQuery</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapicachefile">ISAPICacheFile</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapifakeasync">ISAPIFakeAsync</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapilognotsupported">ISAPILogNotSupported</a></li>
|
||
<li><img alt="" src="../images/down.gif" /> <a href="#isapireadaheadbuffer">ISAPIReadAheadBuffer</a></li>
|
||
</ul>
|
||
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_isapi">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_isapi">Report a bug</a></li></ul><h3>See also</h3>
|
||
<ul class="seealso">
|
||
<li><a href="#comments_section">Comments</a></li></ul></div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="section">
|
||
<h2><a name="usage" id="usage">Usage</a> <a title="Permanent link" href="#usage" class="permalink">¶</a></h2>
|
||
|
||
<p>In the server configuration file, use
|
||
the <code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code> directive to
|
||
associate ISAPI files with the <code>isapi-handler</code> handler, and map
|
||
it to them with their file extensions. To enable any .dll file to be
|
||
processed as an ISAPI extension, edit the httpd.conf file and add the
|
||
following line:</p>
|
||
<pre class="prettyprint lang-config">AddHandler isapi-handler .dll</pre>
|
||
|
||
|
||
<div class="note">In older versions of the Apache server,
|
||
<code>isapi-isa</code> was the proper handler name, rather than
|
||
<code>isapi-handler</code>. As of 2.3 development versions of the Apache
|
||
server, <code>isapi-isa</code> is no longer valid. You will need to
|
||
change your configuration to use <code>isapi-handler</code>
|
||
instead.</div>
|
||
|
||
<p>There is no capability within the Apache server to leave a
|
||
requested module loaded. However, you may preload and keep a
|
||
specific module loaded by using the following syntax in your
|
||
httpd.conf:</p>
|
||
<pre class="prettyprint lang-config">ISAPICacheFile c:/WebWork/Scripts/ISAPI/mytest.dll</pre>
|
||
|
||
|
||
<p>Whether or not you have preloaded an ISAPI extension, all
|
||
ISAPI extensions are governed by the same permissions and
|
||
restrictions as CGI scripts. That is, <code class="directive"><a href="../mod/core.html#options">Options</a></code> <code>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
|
||
<code class="module"><a href="../mod/mod_isapi.html">mod_isapi</a></code>.</p>
|
||
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="section">
|
||
<h2><a name="notes" id="notes">Additional Notes</a> <a title="Permanent link" href="#notes" class="permalink">¶</a></h2>
|
||
|
||
<p>Apache's ISAPI implementation conforms to all of the ISAPI
|
||
2.0 specification, except for some "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, the directive <code>ISAPILogNotSupported
|
||
Off</code> exists to quiet this noise.</p>
|
||
|
||
<p>Some servers, like Microsoft IIS, load the ISAPI extension
|
||
into the server and keep it loaded until memory usage is too
|
||
high, or unless configuration options are specified. Apache
|
||
currently loads and unloads the ISAPI extension each time it is
|
||
requested, unless the <code class="directive"><a href="#isapicachefile">ISAPICacheFile</a></code> directive is specified.
|
||
This is inefficient, but Apache's memory model makes this the
|
||
most effective method. Many ISAPI modules are subtly
|
||
incompatible with the Apache server, and unloading these
|
||
modules helps to ensure the stability of the server.</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>
|
||
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="section">
|
||
<h2><a name="journal" id="journal">Programmer's Journal</a> <a title="Permanent link" href="#journal" class="permalink">¶</a></h2>
|
||
|
||
<p>If you are programming Apache 2.0 <code class="module"><a href="../mod/mod_isapi.html">mod_isapi</a></code>
|
||
modules, you must limit your calls to <code>ServerSupportFunction</code>
|
||
to the following directives:</p>
|
||
|
||
<dl>
|
||
<dt><code>HSE_REQ_SEND_URL_REDIRECT_RESP</code></dt>
|
||
<dd>Redirect the user to another location.<br />
|
||
This must be a fully qualified URL (<em>e.g.</em>
|
||
<code>http://server/location</code>).</dd>
|
||
|
||
<dt><code>HSE_REQ_SEND_URL</code></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 (<em>e.g.</em> simply
|
||
<code>/location</code>).<br />
|
||
This redirection is handled by the server, not the
|
||
browser.<br />
|
||
<div class="warning"><h3>Warning</h3>
|
||
<p>In their recent documentation, Microsoft appears to have
|
||
abandoned the distinction between the two
|
||
<code>HSE_REQ_SEND_URL</code> functions. Apache continues to treat
|
||
them as two distinct functions with different requirements
|
||
and behaviors.</p>
|
||
</div></dd>
|
||
|
||
<dt><code>HSE_REQ_SEND_RESPONSE_HEADER</code></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><code>HSE_REQ_DONE_WITH_SESSION</code></dt>
|
||
<dd>Apache considers this a no-op, since the session will be
|
||
finished when the ISAPI returns from processing.</dd>
|
||
|
||
<dt><code>HSE_REQ_MAP_URL_TO_PATH</code></dt>
|
||
<dd>Apache will translate a virtual name to a physical
|
||
name.</dd>
|
||
|
||
<dt><code>HSE_APPEND_LOG_PARAMETER</code></dt>
|
||
<dd>
|
||
This logged message may be captured in any of the following
|
||
logs:
|
||
|
||
<ul>
|
||
<li>in the <code>\"%{isapi-parameter}n\"</code> component in a
|
||
<code class="directive"><a href="../mod/mod_log_config.html#customlog">CustomLog</a></code>
|
||
directive</li>
|
||
|
||
<li>in the <code>%q</code> log component with the
|
||
<code class="directive"><a href="#isapiappendlogtoquery">ISAPIAppendLogToQuery</a></code>
|
||
<code>On</code> directive</li>
|
||
|
||
<li>in the error log with the <code class="directive"><a href="#isapiappendlogtoerrors">ISAPIAppendLogToErrors</a></code> <code>On</code> directive</li>
|
||
</ul>
|
||
|
||
<p>The first option, the <code>%{isapi-parameter}n</code> component,
|
||
is always available and preferred.</p>
|
||
</dd>
|
||
|
||
<dt><code>HSE_REQ_IS_KEEP_CONN</code></dt>
|
||
<dd>Will return the negotiated Keep-Alive status.</dd>
|
||
|
||
<dt><code>HSE_REQ_SEND_RESPONSE_HEADER_EX</code></dt>
|
||
<dd>Will behave as documented, although the <code>fKeepConn</code>
|
||
flag is ignored.</dd>
|
||
|
||
<dt><code>HSE_REQ_IS_CONNECTED</code></dt>
|
||
<dd>Will report false if the request has been aborted.</dd>
|
||
</dl>
|
||
|
||
<p>Apache returns <code>FALSE</code> to any unsupported call to
|
||
<code>ServerSupportFunction</code>, and sets the
|
||
<code>GetLastError</code> value to
|
||
<code>ERROR_INVALID_PARAMETER</code>.</p>
|
||
|
||
<p><code>ReadClient</code> retrieves the request body exceeding the
|
||
initial buffer (defined by <code class="directive"><a href="#isapireadaheadbuffer">ISAPIReadAheadBuffer</a></code>). Based on the
|
||
<code class="directive">ISAPIReadAheadBuffer</code> 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 <code>ReadClient</code> to
|
||
retrieve the remaining request body.</p>
|
||
|
||
<p><code>WriteClient</code> is supported, but only with the
|
||
<code>HSE_IO_SYNC</code> flag or no option flag (value of
|
||
<code>0</code>). Any other <code>WriteClient</code> request
|
||
will be rejected with a return value of <code>FALSE</code>, and a
|
||
<code>GetLastError</code> value of
|
||
<code>ERROR_INVALID_PARAMETER</code>.</p>
|
||
|
||
<p><code>GetServerVariable</code> is supported, although extended server
|
||
variables do not exist (as defined by other servers.) All the
|
||
usual Apache CGI environment variables are available from
|
||
<code>GetServerVariable</code>, as well as the <code>ALL_HTTP</code>
|
||
and <code>ALL_RAW</code> values.</p>
|
||
|
||
<p>Since httpd 2.0, <code class="module"><a href="../mod/mod_isapi.html">mod_isapi</a></code> supports additional
|
||
features introduced in later versions of the ISAPI specification,
|
||
as well as limited emulation of async I/O and the
|
||
<code>TransmitFile</code> semantics. Apache httpd also supports preloading
|
||
ISAPI .dlls for performance.</p>
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPIAppendLogToErrors" id="ISAPIAppendLogToErrors">ISAPIAppendLogToErrors</a> <a name="isapiappendlogtoerrors" id="isapiappendlogtoerrors">Directive</a> <a title="Permanent link" href="#isapiappendlogtoerrors" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Record <code>HSE_APPEND_LOG_PARAMETER</code> requests from
|
||
ISAPI extensions to the error log</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPIAppendLogToErrors on|off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ISAPIAppendLogToErrors off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>Record <code>HSE_APPEND_LOG_PARAMETER</code> requests from ISAPI
|
||
extensions to the server error log.</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPIAppendLogToQuery" id="ISAPIAppendLogToQuery">ISAPIAppendLogToQuery</a> <a name="isapiappendlogtoquery" id="isapiappendlogtoquery">Directive</a> <a title="Permanent link" href="#isapiappendlogtoquery" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Record <code>HSE_APPEND_LOG_PARAMETER</code> requests from
|
||
ISAPI extensions to the query field</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPIAppendLogToQuery on|off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ISAPIAppendLogToQuery on</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>Record <code>HSE_APPEND_LOG_PARAMETER</code> requests from ISAPI
|
||
extensions to the query field (appended to the <code class="directive"><a href="../mod/mod_log_config.html#customlog">CustomLog</a></code> <code>%q</code>
|
||
component).</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPICacheFile" id="ISAPICacheFile">ISAPICacheFile</a> <a name="isapicachefile" id="isapicachefile">Directive</a> <a title="Permanent link" href="#isapicachefile" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>ISAPI .dll files to be loaded at startup</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPICacheFile <var>file-path</var> [<var>file-path</var>]
|
||
...</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>Specifies a space-separated list of file names to be loaded
|
||
when the Apache server is launched, and remain loaded until the
|
||
server is shut down. This directive may be repeated for every
|
||
ISAPI .dll file desired. The full path name of each file should
|
||
be specified. If the path name is not absolute, it will be treated
|
||
relative to <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>.</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPIFakeAsync" id="ISAPIFakeAsync">ISAPIFakeAsync</a> <a name="isapifakeasync" id="isapifakeasync">Directive</a> <a title="Permanent link" href="#isapifakeasync" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Fake asynchronous support for ISAPI callbacks</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPIFakeAsync on|off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ISAPIFakeAsync off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>While set to on, asynchronous support for ISAPI callbacks is
|
||
simulated.</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPILogNotSupported" id="ISAPILogNotSupported">ISAPILogNotSupported</a> <a name="isapilognotsupported" id="isapilognotsupported">Directive</a> <a title="Permanent link" href="#isapilognotsupported" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Log unsupported feature requests from ISAPI
|
||
extensions</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPILogNotSupported on|off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ISAPILogNotSupported off</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>Logs all requests for unsupported features from ISAPI
|
||
extensions in the server error log. This may help administrators
|
||
to track down problems. Once set to on and all desired ISAPI modules
|
||
are functioning, it should be set back to off.</p>
|
||
|
||
</div>
|
||
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
|
||
<div class="directive-section"><h2><a name="ISAPIReadAheadBuffer" id="ISAPIReadAheadBuffer">ISAPIReadAheadBuffer</a> <a name="isapireadaheadbuffer" id="isapireadaheadbuffer">Directive</a> <a title="Permanent link" href="#isapireadaheadbuffer" class="permalink">¶</a></h2>
|
||
<table class="directive">
|
||
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Size of the Read Ahead Buffer sent to ISAPI
|
||
extensions</td></tr>
|
||
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ISAPIReadAheadBuffer <var>size</var></code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ISAPIReadAheadBuffer 49152</code></td></tr>
|
||
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
|
||
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
|
||
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
|
||
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_isapi</td></tr>
|
||
</table>
|
||
<p>Defines the maximum size of the Read Ahead Buffer sent to
|
||
ISAPI extensions when they are initially invoked. All remaining
|
||
data must be retrieved using the <code>ReadClient</code> callback; some
|
||
ISAPI extensions may not support the <code>ReadClient</code> function.
|
||
Refer questions to the ISAPI extension's author.</p>
|
||
|
||
</div>
|
||
</div>
|
||
<div class="bottomlang">
|
||
<p><span>Available Languages: </span><a href="../en/mod/mod_isapi.html" title="English"> en </a> |
|
||
<a href="../fr/mod/mod_isapi.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
|
||
<a href="../ko/mod/mod_isapi.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
|
||
</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
|
||
<script type="text/javascript"><!--//--><![CDATA[//><!--
|
||
var comments_shortname = 'httpd';
|
||
var comments_identifier = 'http://httpd.apache.org/docs/trunk/mod/mod_isapi.html';
|
||
(function(w, d) {
|
||
if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
|
||
d.write('<div id="comments_thread"><\/div>');
|
||
var s = d.createElement('script');
|
||
s.type = 'text/javascript';
|
||
s.async = true;
|
||
s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
|
||
(d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
|
||
}
|
||
else {
|
||
d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
|
||
}
|
||
})(window, document);
|
||
//--><!]]></script></div><div id="footer">
|
||
<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
|
||
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!--
|
||
if (typeof(prettyPrint) !== 'undefined') {
|
||
prettyPrint();
|
||
}
|
||
//--><!]]></script>
|
||
</body></html> |