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<title>mod_lua - Apache HTTP Server</title>
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<p class="menu"><a href="/mod/">Modules</a> | <a href="/mod/directives.html">Directives</a> | <a href="/faq/">FAQ</a> | <a href="/glossary.html">Glossary</a> | <a href="/sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.3</p>
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<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 2.3</a> > <a href="./">Modules</a></div>
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<div id="preamble"><h1>Apache Module mod_lua</h1>
<div class="toplang">
<p><span>Available Languages: </span></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides Lua hooks to do cool stuff</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>lua_module</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>2.4 and later</td></tr></table>
<h3>Summary</h3>
<p>Someone needs to write this.</p>
<div class="example"><h3>Example</h3><p><code>
# Examples are always helpful.<br />
</code></p></div>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="/images/down.gif" /> <a href="#luahookaccesschecker">LuaHookAccessChecker</a></li>
<li><img alt="" src="/images/down.gif" /> <a href="#luahookinsertfilter">LuaHookInsertFilter</a></li>
<li><img alt="" src="/images/down.gif" /> <a href="#luahookmaptostorage">LuaHookMapToStorage</a></li>
<li><img alt="" src="/images/down.gif" /> <a href="#luahooktranslatename">LuaHookTranslateName</a></li>
</ul>
<h3>Topics</h3>
<ul id="topics">
</ul><h3>See also</h3>
<ul class="seealso">
<li><a href="...">Useful document</a></li>
</ul></div>
<div class="section">
<h2><a name="moredocs" id="moredocs">Additional Documentation</a></h2>
<p>More detailed information about the module in general (as opposed to
the individual directives) can follow in sections containing titles.</p>
<p>The <code>id</code> attribute will be translated into a hypertext
anchor target.</p>
<p>References to directives should use the directive tag: <code class="directive"><a href="#templatedirective">TemplateDirective</a></code>. References to
modules should use the module tag
</div>
<div class="directive-section"><h2><a name="" id="" /> <a name="" id="">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookFixups /path/to/lua/script.lua hook_function_name</code></td></tr>
</table>
</div>
<div class="directive-section"><h2><a name="LuaCodeCache" id="LuaCodeCache">LuaCodeCache</a> <a name="luacodecache" id="luacodecache">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaCodeCache stat|forever|never</code></td></tr>
</table><p>
Specify the behavior of the in-memory code cache. The default
is stat, which stats the top level script (not any included
ones) each time that file is needed, and reloads it if the
modified time indicates it is newer than the one it has
already loaded. The other values cause it to keep the file
cached forever (don't stat and replace) or to never cache the
file.</p>
<p>In general stat or forever is good production and stat or never
for deveopment.</p>
<div class="example"><h3>Examples:</h3><p><code>
LuaCodeCache stat<br />
LuaCodeCache forever<br />
LuaCodeCache never<br />
</code></p></div>
</div>
<div class="directive-section"><h2><a name="LuaHookAccessChecker" id="LuaHookAccessChecker">LuaHookAccessChecker</a> <a name="luahookaccesschecker" id="luahookaccesschecker">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookAccessChecker /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaHookAuthChecker" id="LuaHookAuthChecker">LuaHookAuthChecker</a> <a name="luahookauthchecker" id="luahookauthchecker">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookAuthChecker /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaHookAuthChecker" id="LuaHookAuthChecker">LuaHookAuthChecker</a> <a name="luahookauthchecker" id="luahookauthchecker">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookAuthChecker /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaHookCheckUserID" id="LuaHookCheckUserID">LuaHookCheckUserID</a> <a name="luahookcheckuserid" id="luahookcheckuserid">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookCheckUserID /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaHookInsertFilter" id="LuaHookInsertFilter">LuaHookInsertFilter</a> <a name="luahookinsertfilter" id="luahookinsertfilter">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookInsertFilter /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>Not Yet Implemented</p>
</div>
<div class="directive-section"><h2><a name="LuaHookMapToStorage" id="LuaHookMapToStorage">LuaHookMapToStorage</a> <a name="luahookmaptostorage" id="luahookmaptostorage">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookMapToStorage /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaHookTranslateName" id="LuaHookTranslateName">LuaHookTranslateName</a> <a name="luahooktranslatename" id="luahooktranslatename">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookTranslateName /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>
Add a hook (at APR_HOOK_MIDDLE) to the translate name phase of
request processing. The hook function receives a single
argument, the request_rec, and should return a status code,
which is either an HTTP error code, or the constants defined
in the apache2 module: apache2.OK, apache2.DECLINED, or
apache2.DONE. </p>
<p>For those new to hooks, basically each hook will be invoked
until one of them returns apache2.OK. If your hook doesn't
want to do the translation it should just return
apache2.DECLINED. If the request should stop processing, then
return apache2.DONE.</p>
<p>Example:</p>
<div class="example"><p><code>
<br />
function silly_mapper(r)<br />
if r.uri == "/" then<br />
return apache2.OK<br />
else<br />
return apache2.DECLINED<br />
end<br />
end<br />
</code></p></div>
</div>
<div class="directive-section"><h2><a name="LuaHookTypeChecker" id="LuaHookTypeChecker">LuaHookTypeChecker</a> <a name="luahooktypechecker" id="luahooktypechecker">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookTypeChecker /path/to/lua/script.lua hook_function_name</code></td></tr>
</table><p>...</p>
</div>
<div class="directive-section"><h2><a name="LuaMapHandler" id="LuaMapHandler">LuaMapHandler</a> <a name="luamaphandler" id="luamaphandler">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaMapHandler uri-pattern /path/to/lua/script.lua [function-name]</code></td></tr>
</table>
<p>This directive matches a uri pattern to invoke a specific
handler function in a specific file. It uses PCRE regular
expressions to match the uri, and supports interpolating
match groups into both the file path and the function name
be careful writing your regular expressions to avoid security
issues.</p>
<div class="example"><h3>Examples:</h3><p><code>
LuaMapHandler /(\w+)/(/w+) /scripts/$1.lua handle_$2
</code></p></div>
to the file /scripts/photos.lua and invoke the
handler function handle_show on the lua vm after
loading that file.</p>
<div class="example"><p><code>
LuaMapHandler /bingo /scripts/wombat.lua
</code></p></div>
<p>This would invoke the "handle" function, which
is the default if no specific function name is
provided.</p>
</div>
<div class="directive-section"><h2><a name="LuaPackageCPath" id="LuaPackageCPath">LuaPackageCPath</a> <a name="luapackagecpath" id="luapackagecpath">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackageCPath /path/to/include/?.soa</code></td></tr>
</table>
<p>Add a path to lua's shared library search path. Follows the same
conventions as lua. This just munges the package.cpath in the
lua vms.</p>
</div>
<div class="directive-section"><h2><a name="LuaPackagePath" id="LuaPackagePath">LuaPackagePath</a> <a name="luapackagepath" id="luapackagepath">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackagePath /path/to/include/?.lua</code></td></tr>
</table><p>Add a path to lua's module search path. Follows the same
conventions as lua. This just munges the package.path in the
lua vms.</p>
<div class="example"><h3>Examples:</h3><p><code>
</code></p></div>
</div>
<div class="directive-section"><h2><a name="LuaRoot" id="LuaRoot">LuaRoot</a> <a name="luaroot" id="luaroot">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify the base path</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaRoot /path/to/a/directory</code></td></tr>
</table>
<p>Specify the base path which will be used to evaluate all
relative paths within mod_wombat. If not specified they
will be resolved relative to the current working directory,
which may not always work well for a server.</p>
</div>
<div class="directive-section"><h2><a name="LuaScope" id="LuaScope">LuaScope</a> <a name="luascope" id="luascope">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaScope once|request|conn|server [max|min max]</code></td></tr>
</table>
<p>Specify the lifecycle scope of the Lua interpreter which will
be used by handlers in this "Directory." The default is "once"</p>
<dl>
<dt>once:</dt> <dd>use the interpreter once and throw it away.</dd>
<dt>request:</dt> <dd>use the interpreter to handle anything based on
the same file within this request, which is also
request scoped.</dd>
<dt>conn:</dt> <dd>Same as request but attached to the connection_rec</dd>
<dt>server:</dt> <dd>This one is different than others because the
server scope is quite long lived, and multiple threads
will have the same server_rec. To accommodate this
server scoped interpreter are stored in an apr
resource list. The min and max arguments are intended
to specify the pool size, but are unused at this time.</dd>
</dl>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span></p>
</div><div id="footer">
<p class="apache">Copyright 2010 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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