1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!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><!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-->
<title>mod_so - Apache HTTP Server</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.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 2.5</p>
<img alt="" src="../images/feather.gif" /></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_so</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_so.html" title="English"> en </a> |
<a href="../fr/mod/mod_so.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_so.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
<a href="../ko/mod/mod_so.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
<a href="../tr/mod/mod_so.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Loading of executable code and
modules into the server at start-up or restart time</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>so_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_so.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>This is a Base module (always included) on
Windows</td></tr></table>
<h3>Summary</h3>
<p>On selected operating systems this module can be used to
load modules into Apache HTTP Server at runtime via the <a href="../dso.html">Dynamic Shared Object</a> (DSO) mechanism,
rather than requiring a recompilation.</p>
<p>On Unix, the loaded code typically comes from shared object
files (usually with <code>.so</code> extension), on Windows
this may either the <code>.so</code> or <code>.dll</code>
extension.</p>
<div class="warning"><h3>Warning</h3>
<p>Modules built for one major version of the Apache HTTP Server
will generally not work on another. (e.g. 1.3 vs. 2.0, or 2.0 vs.
2.2) There are usually API changes between one major version and
another that require that modules be modified to work with the new
version.</p>
</div>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#loadfile">LoadFile</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#loadmodule">LoadModule</a></li>
</ul>
<h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#windows">Creating Loadable Modules for Windows</a></li>
</ul><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="windows" id="windows">Creating Loadable Modules for Windows</a></h2>
<div class="note"><h3>Note</h3>
<p>On Windows, where loadable files typically have a file extension
of <code>.dll</code>, Apache httpd modules are called
<code>mod_whatever.so</code>, just as they are on other platforms.
However, you may encounter third-party modules, such as PHP for
example, that continue to use the <code>.dll</code> convention.</p>
<p>While <code>mod_so</code> still loads modules with
<code>ApacheModuleFoo.dll</code> names, the new naming convention is
preferred; if you are converting your loadable module for 2.0,
please fix the name to this 2.0 convention.</p></div>
<p>The Apache httpd module API is unchanged between the Unix and
Windows versions. Many modules will run on Windows with no or
little change from Unix, although others rely on aspects of the
Unix architecture which are not present in Windows, and will
not work.</p>
<p>When a module does work, it can be added to the server in
one of two ways. As with Unix, it can be compiled into the
server. Because Apache httpd for Windows does not have the
<code>Configure</code> program of Apache httpd for Unix, the module's
source file must be added to the ApacheCore project file, and
its symbols must be added to the
<code>os\win32\modules.c</code> file.</p>
<p>The second way is to compile the module as a DLL, a shared
library that can be loaded into the server at runtime, using
the <code><code class="directive">LoadModule</code></code>
directive. These module DLLs can be distributed and run on any
Apache httpd for Windows installation, without recompilation of the
server.</p>
<p>To create a module DLL, a small change is necessary to the
module's source file: The module record must be exported from
the DLL (which will be created later; see below). To do this,
add the <code>AP_MODULE_DECLARE_DATA</code> (defined in the
Apache httpd header files) to your module's module record definition.
For example, if your module has:</p>
<div class="example"><p><code>
module foo_module;
</code></p></div>
<p>Replace the above with:</p>
<div class="example"><p><code>
module AP_MODULE_DECLARE_DATA foo_module;
</code></p></div>
<p>Note that this will only be activated on Windows, so the
module can continue to be used, unchanged, with Unix if needed.
Also, if you are familiar with <code>.DEF</code> files, you can
export the module record with that method instead.</p>
<p>Now, create a DLL containing your module. You will need to
link this against the libhttpd.lib export library that is
created when the libhttpd.dll shared library is compiled. You
may also have to change the compiler settings to ensure that
the Apache httpd header files are correctly located. You can find
this library in your server root's modules directory. It is
best to grab an existing module .dsp file from the tree to
assure the build environment is configured correctly, or
alternately compare the compiler and link options to your
.dsp.</p>
<p>This should create a DLL version of your module. Now simply
place it in the <code>modules</code> directory of your server
root, and use the <code class="directive">LoadModule</code>
directive to load it.</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="LoadFile" id="LoadFile">LoadFile</a> <a name="loadfile" id="loadfile">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Link in the named object file or library</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LoadFile <em>filename</em> [<em>filename</em>] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_so</td></tr>
</table>
<p>The LoadFile directive links in the named object files or
libraries when the server is started or restarted; this is used
to load additional code which may be required for some module
to work. <em>Filename</em> is either an absolute path or
relative to <a href="core.html#serverroot">ServerRoot</a>.</p>
<p>For example:</p>
<pre class="prettyprint lang-config">LoadFile libexec/libxmlparse.so</pre>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="LoadModule" id="LoadModule">LoadModule</a> <a name="loadmodule" id="loadmodule">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Links in the object file or library, and adds to the list
of active modules</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LoadModule <em>module filename</em></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_so</td></tr>
</table>
<p>The LoadModule directive links in the object file or library
<em>filename</em> and adds the module structure named
<em>module</em> to the list of active modules. <em>Module</em>
is the name of the external variable of type
<code>module</code> in the file, and is listed as the <a href="module-dict.html#ModuleIdentifier">Module Identifier</a>
in the module documentation. Example:</p>
<pre class="prettyprint lang-config">
LoadModule status_module modules/mod_status.so
</pre>
<p>loads the named module from the modules subdirectory of the
ServerRoot.</p>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_so.html" title="English"> en </a> |
<a href="../fr/mod/mod_so.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_so.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
<a href="../ko/mod/mod_so.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
<a href="../tr/mod/mod_so.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </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>This section is experimental!</strong><br />Comments placed here should not be expected
to last beyond the testing phase of this system, nor do we in any way guarantee that we'll read them.</div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
var disqus_shortname = 'httpd';
var disqus_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_so.html.en';
(function(w, d) {
if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
d.write('<div id="disqus_thread"><\/div>');
var s = d.createElement('script');
s.type = 'text/javascript';
s.async = true;
s.src = 'http' + '://' + disqus_shortname + '.disqus.com/embed.js';
(d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
}
else {
d.write('<div id="disqus_thread">Comments have been disabled for offline viewing.<\/div>');
}
})(window, document);
//--><!]]></script></div><div id="footer">
<p class="apache">Copyright 2012 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/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></div><script type="text/javascript"><!--//--><![CDATA[//><!--
if (typeof(prettyPrint) !== 'undefined') {
prettyPrint();
}
//--><!]]></script>
</body></html>
|
