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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_isapi.html.en
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?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 2.4</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/directives.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 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <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">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_isapi.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ko/mod/mod_isapi.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</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"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_isapi">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;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></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></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></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></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></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></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></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></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></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">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_isapi.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ko/mod/mod_isapi.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
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