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8 <title>mod_example_hooks - Apache HTTP Server Version 2.5</title>
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24 <div id="page-content">
25 <div id="preamble"><h1>Apache Module mod_example_hooks</h1>
27 <p><span>Available Languages: </span><a href="../en/mod/mod_example_hooks.html" title="English"> en </a> |
28 <a href="../fr/mod/mod_example_hooks.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
29 <a href="../ko/mod/mod_example_hooks.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
31 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Illustrates the Apache module API</td></tr>
32 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
33 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>example_hooks_module</td></tr>
34 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_example_hooks.c</td></tr></table>
37 <p>The files in the <code>modules/examples</code> directory
38 under the Apache distribution directory tree are provided as an
39 example to those that wish to write modules that use the Apache
42 <p>The main file is <code>mod_example_hooks.c</code>, which
43 illustrates all the different callback mechanisms and call
44 syntaxes. By no means does an add-on module need to include
45 routines for all of the callbacks - quite the contrary!</p>
47 <p>The example module is an actual working module. If you link
48 it into your server, enable the "example-hooks-handler" handler for a
49 location, and then browse to that location, you will see a
50 display of some of the tracing the example module did as the
51 various callbacks were made.</p>
53 <div id="quickview"><h3 class="directives">Directives</h3>
55 <li><img alt="" src="../images/down.gif" /> <a href="#example">Example</a></li>
59 <li><img alt="" src="../images/down.gif" /> <a href="#compiling">Compiling the example_hooks module</a></li>
60 <li><img alt="" src="../images/down.gif" /> <a href="#using">Using the <code>mod_example_hooks</code> Module</a></li>
61 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
62 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
63 <div class="directive-section"><h2><a name="Example" id="Example">Example</a> <a name="example" id="example">Directive</a></h2>
64 <table class="directive">
65 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Demonstration directive to illustrate the Apache module
67 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Example</code></td></tr>
68 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
69 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
70 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_example_hooks</td></tr>
72 <p>The <code class="directive">Example</code> directive just sets a demonstration
73 flag which the example module's content handler displays. It
74 takes no arguments. If you browse to an URL to which the
75 example-hooks content-handler applies, you will get a display of the
76 routines within the module and how and in what order they were
77 called to service the document request. The effect of this
78 directive one can observe under the point "<code>Example
79 directive declared here: YES/NO</code>".</p>
82 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
84 <h2><a name="compiling" id="compiling">Compiling the example_hooks module</a></h2>
86 <p>To include the example_hooks module in your server, follow the
91 Run <code class="program"><a href="../programs/configure.html">configure</a></code> with <code>--enable-example-hooks</code>
94 <li>Make the server (run "<code>make</code>").</li>
97 <p>To add another module of your own:</p>
100 <li><code>cp modules/examples/mod_example_hooks.c
101 modules/new_module/<em>mod_myexample.c</em></code></li>
103 <li>Modify the file.</li>
105 <li>Create <code>modules/new_module/config.m4</code>.
107 <li>Add <code>APACHE_MODPATH_INIT(new_module)</code>.</li>
108 <li>Copy APACHE_MODULE line with "example_hooks" from
109 <code>modules/examples/config.m4</code>.</li>
110 <li>Replace the first argument "example_hooks" with <em>myexample</em>.</li>
111 <li>Replace the second argument with brief description of your module.
112 It will be used in <code>configure --help</code>.</li>
113 <li>If your module needs additional C compiler flags, linker flags or
114 libraries, add them to CFLAGS, LDFLAGS and LIBS accordingly.
115 See other <code>config.m4</code> files in modules directory for
117 <li>Add <code>APACHE_MODPATH_FINISH</code>.</li>
121 <li>Create <code>module/new_module/Makefile.in</code>.
122 If your module doesn't need special build instructions,
123 all you need to have in that file is
124 <code>include $(top_srcdir)/build/special.mk</code>.</li>
126 <li>Run ./buildconf from the top-level directory.</li>
128 <li>Build the server with --enable-myexample</li>
131 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
132 <div class="section">
133 <h2><a name="using" id="using">Using the <code>mod_example_hooks</code> Module</a></h2>
135 <p>To activate the example_hooks module, include a block similar to
136 the following in your <code>httpd.conf</code> file:</p>
137 <pre class="prettyprint lang-config"><Location /example-hooks-info>
138 SetHandler example-hooks-handler
139 </Location></pre>
142 <p>As an alternative, you can put the following into a <a href="core.html#accessfilename"><code>.htaccess</code></a> file
143 and then request the file "test.example" from that location:</p>
144 <pre class="prettyprint lang-config">AddHandler example-hooks-handler .example</pre>
147 <p>After reloading/restarting your server, you should be able
148 to browse to this location and see the brief display mentioned
152 <div class="bottomlang">
153 <p><span>Available Languages: </span><a href="../en/mod/mod_example_hooks.html" title="English"> en </a> |
154 <a href="../fr/mod/mod_example_hooks.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
155 <a href="../ko/mod/mod_example_hooks.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
156 </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 again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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