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10 <title>mod_example_hooks - Apache HTTP Server Version 2.5</title>
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26 <div id="page-content">
27 <div id="preamble"><h1>Apache Module mod_example_hooks</h1>
29 <p><span>Available Languages: </span><a href="../en/mod/mod_example_hooks.html" title="English"> en </a> |
30 <a href="../fr/mod/mod_example_hooks.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
31 <a href="../ko/mod/mod_example_hooks.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
33 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Illustrates the Apache module API</td></tr>
34 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
35 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>example_hooks_module</td></tr>
36 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_example_hooks.c</td></tr></table>
39 <p>The files in the <code>modules/examples</code> directory
40 under the Apache distribution directory tree are provided as an
41 example to those that wish to write modules that use the Apache
44 <p>The main file is <code>mod_example_hooks.c</code>, which
45 illustrates all the different callback mechanisms and call
46 syntaxes. By no means does an add-on module need to include
47 routines for all of the callbacks - quite the contrary!</p>
49 <p>The example module is an actual working module. If you link
50 it into your server, enable the "example-hooks-handler" handler for a
51 location, and then browse to that location, you will see a
52 display of some of the tracing the example module did as the
53 various callbacks were made.</p>
55 <div id="quickview"><h3>Topics</h3>
57 <li><img alt="" src="../images/down.gif" /> <a href="#compiling">Compiling the example_hooks module</a></li>
58 <li><img alt="" src="../images/down.gif" /> <a href="#using">Using the <code>mod_example_hooks</code> Module</a></li>
59 </ul><h3 class="directives">Directives</h3>
61 <li><img alt="" src="../images/down.gif" /> <a href="#example">Example</a></li>
63 <h3>Bugfix checklist:</h3><ul class="seealso"><li><a href="http://httpd.apache.org/dev/dist/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">Open bugs</a></li></ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
64 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
66 <h2><a name="compiling" id="compiling">Compiling the example_hooks module</a></h2>
68 <p>To include the example_hooks module in your server, follow the
73 Run <code class="program"><a href="../programs/configure.html">configure</a></code> with <code>--enable-example-hooks</code>
76 <li>Make the server (run "<code>make</code>").</li>
79 <p>To add another module of your own:</p>
82 <li><code>cp modules/examples/mod_example_hooks.c
83 modules/new_module/<em>mod_myexample.c</em></code></li>
85 <li>Modify the file.</li>
87 <li>Create <code>modules/new_module/config.m4</code>.
89 <li>Add <code>APACHE_MODPATH_INIT(new_module)</code>.</li>
90 <li>Copy APACHE_MODULE line with "example_hooks" from
91 <code>modules/examples/config.m4</code>.</li>
92 <li>Replace the first argument "example_hooks" with <em>myexample</em>.</li>
93 <li>Replace the second argument with brief description of your module.
94 It will be used in <code>configure --help</code>.</li>
95 <li>If your module needs additional C compiler flags, linker flags or
96 libraries, add them to CFLAGS, LDFLAGS and LIBS accordingly.
97 See other <code>config.m4</code> files in modules directory for
99 <li>Add <code>APACHE_MODPATH_FINISH</code>.</li>
103 <li>Create <code>module/new_module/Makefile.in</code>.
104 If your module doesn't need special build instructions,
105 all you need to have in that file is
106 <code>include $(top_srcdir)/build/special.mk</code>.</li>
108 <li>Run ./buildconf from the top-level directory.</li>
110 <li>Build the server with --enable-myexample</li>
113 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
114 <div class="section">
115 <h2><a name="using" id="using">Using the <code>mod_example_hooks</code> Module</a></h2>
117 <p>To activate the example_hooks module, include a block similar to
118 the following in your <code>httpd.conf</code> file:</p>
119 <pre class="prettyprint lang-config"><Location "/example-hooks-info">
120 SetHandler example-hooks-handler
121 </Location></pre>
124 <p>As an alternative, you can put the following into a <a href="core.html#accessfilename"><code>.htaccess</code></a> file
125 and then request the file "test.example" from that location:</p>
126 <pre class="prettyprint lang-config">AddHandler example-hooks-handler .example</pre>
129 <p>After reloading/restarting your server, you should be able
130 to browse to this location and see the brief display mentioned
133 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
134 <div class="directive-section"><h2><a name="Example" id="Example">Example</a> <a name="example" id="example">Directive</a></h2>
135 <table class="directive">
136 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Demonstration directive to illustrate the Apache module
138 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Example</code></td></tr>
139 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
140 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
141 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_example_hooks</td></tr>
143 <p>The <code class="directive">Example</code> directive just sets a demonstration
144 flag which the example module's content handler displays. It
145 takes no arguments. If you browse to an URL to which the
146 example-hooks content-handler applies, you will get a display of the
147 routines within the module and how and in what order they were
148 called to service the document request. The effect of this
149 directive one can observe under the point "<code>Example
150 directive declared here: YES/NO</code>".</p>
154 <div class="bottomlang">
155 <p><span>Available Languages: </span><a href="../en/mod/mod_example_hooks.html" title="English"> en </a> |
156 <a href="../fr/mod/mod_example_hooks.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
157 <a href="../ko/mod/mod_example_hooks.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
158 </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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