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cfbca4e518f4981f435e93e434f17271e6efc138rbowen<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>
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cfbca4e518f4981f435e93e434f17271e6efc138rbowen<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>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<p><span>Available Languages: </span><a href="/en/mod/mod_macro.html" title="English"> en </a> |
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<a href="/fr/mod/mod_macro.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a></p>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>This module provides usage of macros within apache runtime configuration files</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>macro_module</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_macro.c</td></tr></table>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <p>This modules provides macros within apache runtime configuration files.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen These macros have parameters. They are expanded when used (parameters are
cfbca4e518f4981f435e93e434f17271e6efc138rbowen substituted by their values given as an argument), and the result is
cfbca4e518f4981f435e93e434f17271e6efc138rbowen processed normally.</p>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div id="quickview"><h3 class="directives">Directives</h3>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<li><img alt="" src="/images/down.gif" /> <a href="#macro"><Macro></a></li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<li><img alt="" src="/images/down.gif" /> <a href="#undefmacro">undefMacro</a></li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<li><img alt="" src="/images/down.gif" /> <a href="#use">Use</a></li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<li><img alt="" src="/images/down.gif" /> <a href="#features">Features</a></li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<h2><a name="features" id="features">Features</a></h2>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen Definition of a macro:
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> macro definition within a <Macro> section, following
cfbca4e518f4981f435e93e434f17271e6efc138rbowen the apache style.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> user defined names for the macro and its parameters.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> macro names are case-insensitive, like apache directives.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> macro definitions can be nested... (but what for?)</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> warn about macro parameter names which prefix one another.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> warn if a parameter is not prefixed by any of '<code>$%@</code>'
cfbca4e518f4981f435e93e434f17271e6efc138rbowen (good practice).</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> the available prefixes help deal with interactions with other
cfbca4e518f4981f435e93e434f17271e6efc138rbowen directives such as <code class="directive"><a href="/mod/core.html#define">Define</a></code>.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> tip: it may be useful to define a macro parameter with surrounding
cfbca4e518f4981f435e93e434f17271e6efc138rbowen braces, say <code>${foo}</code> so that the name can appear with
cfbca4e518f4981f435e93e434f17271e6efc138rbowen surrounding characters such as <code>bla${foo}bla</code>.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> warns if sections are not properly nested within a macro.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen (if it is detected so).</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> the lexical scope of macro parameters is restricted to the macro text,
cfbca4e518f4981f435e93e434f17271e6efc138rbowen it is not forwarded to includes for instance.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> arbitrary contents in macros.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <p>It means you can put perl sections or whatever you like in a macro.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen No assumption is made about the lexical structure (quotes, spaces or
cfbca4e518f4981f435e93e434f17271e6efc138rbowen whatever) within the macro contents but to expect a set of
cfbca4e518f4981f435e93e434f17271e6efc138rbowen Use of a macro:
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> number of arguments must match the definition.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> all occurences of macro parameters are substituted by their values.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> in case of conflicts, the longest parameter name is chosen.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> macro expansion recursion is detected and stopped (error).</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> on errors, try to describe precisely where the error occured.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> <code>$</code> and <code>%</code>-prefixed parameters are not
cfbca4e518f4981f435e93e434f17271e6efc138rbowen escaped.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <li> <code>@</code>-prefixed parameters are escaped in quotes.</li>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen Removal of a macro definition:
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<Macro DirGroup $dir $group>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <Directory $dir>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen require group $group
cfbca4e518f4981f435e93e434f17271e6efc138rbowen </Directory>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen</Macro>
cfbca4e518f4981f435e93e434f17271e6efc138rbowenUndefMacro DirGroup
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="directive-section"><h2><a name="Macro" id="Macro"><Macro></a> <a name="macro" id="macro">Directive</a></h2>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define a configuration file macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<Macro <var>name</var> [<var>par1</var> .. <var>parN</var>]>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <p>The <code class="directive">Macro</code> directive controls the definition of
cfbca4e518f4981f435e93e434f17271e6efc138rbowen a macro within the server runtime configuration files.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen The first argument is the name of the macro.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen Other arguments are parameters to the macro. It is good practice to prefix
cfbca4e518f4981f435e93e434f17271e6efc138rbowen parameter names with any of '<code>$%@</code>', and not macro names
cfbca4e518f4981f435e93e434f17271e6efc138rbowen with such characters.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<Macro LocalAccessPolicy>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen order deny,allow
cfbca4e518f4981f435e93e434f17271e6efc138rbowen deny from all
cfbca4e518f4981f435e93e434f17271e6efc138rbowen</Macro>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<Macro RestrictedAccessPolicy $ipnumbers>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen order deny,allow
cfbca4e518f4981f435e93e434f17271e6efc138rbowen deny from all
cfbca4e518f4981f435e93e434f17271e6efc138rbowen allow from $ipnumbers
cfbca4e518f4981f435e93e434f17271e6efc138rbowen</Macro>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="directive-section"><h2><a name="undefMacro" id="undefMacro">undefMacro</a> <a name="undefmacro" id="undefmacro">Directive</a></h2>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Undefine a macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UndefMacro <var>name</var></code></td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <p>The <code class="directive">UndefMacro</code> directive undefines a macro
cfbca4e518f4981f435e93e434f17271e6efc138rbowen which has been defined before hand.</p>
cfbca4e518f4981f435e93e434f17271e6efc138rbowenUndefMacro LocalAccessPolicy
cfbca4e518f4981f435e93e434f17271e6efc138rbowenUndefMacro RestrictedAccessPolicy
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<div class="directive-section"><h2><a name="Use" id="Use">Use</a> <a name="use" id="use">Directive</a></h2>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Use a macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Use <var>name</var> [<var>value1</var> ... <var>valueN</var>]
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_macro</td></tr>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen <p> The <code class="directive">Use</code> directive controls the use of a macro.
cfbca4e518f4981f435e93e434f17271e6efc138rbowen The specified macro is expanded. It must be given the same number of
cfbca4e518f4981f435e93e434f17271e6efc138rbowen arguments than in the macro definition. The provided values are
cfbca4e518f4981f435e93e434f17271e6efc138rbowen associated to their corresponding initial parameters and are substituted
cfbca4e518f4981f435e93e434f17271e6efc138rbowen before processing.</p>
cfbca4e518f4981f435e93e434f17271e6efc138rbowenUse LocalAccessPolicy
cfbca4e518f4981f435e93e434f17271e6efc138rbowenUse RestrictedAccessPolicy "192.54.172.0/24 192.54.148.0/24"
cfbca4e518f4981f435e93e434f17271e6efc138rbowen is equivalent, with the macros defined above, to:
cfbca4e518f4981f435e93e434f17271e6efc138rbowenorder deny,allow
cfbca4e518f4981f435e93e434f17271e6efc138rbowendeny from all
cfbca4e518f4981f435e93e434f17271e6efc138rbowenorder deny,allow
cfbca4e518f4981f435e93e434f17271e6efc138rbowendeny from all
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<p><span>Available Languages: </span><a href="/en/mod/mod_macro.html" title="English"> en </a> |
cfbca4e518f4981f435e93e434f17271e6efc138rbowen<a href="/fr/mod/mod_macro.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a></p>
cfbca4e518f4981f435e93e434f17271e6efc138rbowen</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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cfbca4e518f4981f435e93e434f17271e6efc138rbowen<p class="apache">Copyright 2013 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>
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