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8 <title>mod_lua - Apache HTTP Server</title>
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18 <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>
19 <p class="apache">Apache HTTP Server Version 2.5</p>
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23 <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>
24 <div id="page-content">
25 <div id="preamble"><h1>Apache Module mod_lua</h1>
27 <p><span>Available Languages: </span><a href="../en/mod/mod_lua.html" title="English"> en </a> |
28 <a href="../fr/mod/mod_lua.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
30 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides Lua hooks into various portions of the httpd
31 request processing</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>lua_module</td></tr>
34 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_lua.c</td></tr>
35 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>2.3 and later</td></tr></table>
38 <p>This module allows the server to be extended with scripts written in the
39 Lua programming language. The extension points (hooks) available with
40 <code class="module"><a href="../mod/mod_lua.html">mod_lua</a></code> include many of the hooks available to
41 natively compiled Apache HTTP Server modules, such as mapping requests to
42 files, generating dynamic responses, access control, authentication, and
45 <p>More information on the Lua programming language can be found at the
46 <a href="http://www.lua.org/">the Lua website</a>.</p>
48 <div class="note"><code>mod_lua</code> is still in experimental state.
49 Until it is declared stable, usage and behavior may change
50 at any time, even between stable releases of the 2.4.x series.
51 Be sure to check the CHANGES file before upgrading.</div>
54 <div id="quickview"><h3 class="directives">Directives</h3>
56 <li><img alt="" src="../images/down.gif" /> <a href="#luacodecache">LuaCodeCache</a></li>
57 <li><img alt="" src="../images/down.gif" /> <a href="#luahookaccesschecker">LuaHookAccessChecker</a></li>
58 <li><img alt="" src="../images/down.gif" /> <a href="#luahookauthchecker">LuaHookAuthChecker</a></li>
59 <li><img alt="" src="../images/down.gif" /> <a href="#luahookcheckuserid">LuaHookCheckUserID</a></li>
60 <li><img alt="" src="../images/down.gif" /> <a href="#luahookfixups">LuaHookFixups</a></li>
61 <li><img alt="" src="../images/down.gif" /> <a href="#luahookinsertfilter">LuaHookInsertFilter</a></li>
62 <li><img alt="" src="../images/down.gif" /> <a href="#luahookmaptostorage">LuaHookMapToStorage</a></li>
63 <li><img alt="" src="../images/down.gif" /> <a href="#luahooktranslatename">LuaHookTranslateName</a></li>
64 <li><img alt="" src="../images/down.gif" /> <a href="#luahooktypechecker">LuaHookTypeChecker</a></li>
65 <li><img alt="" src="../images/down.gif" /> <a href="#luainherit">LuaInherit</a></li>
66 <li><img alt="" src="../images/down.gif" /> <a href="#luamaphandler">LuaMapHandler</a></li>
67 <li><img alt="" src="../images/down.gif" /> <a href="#luapackagecpath">LuaPackageCPath</a></li>
68 <li><img alt="" src="../images/down.gif" /> <a href="#luapackagepath">LuaPackagePath</a></li>
69 <li><img alt="" src="../images/down.gif" /> <a href="#luaquickhandler">LuaQuickHandler</a></li>
70 <li><img alt="" src="../images/down.gif" /> <a href="#luaroot">LuaRoot</a></li>
71 <li><img alt="" src="../images/down.gif" /> <a href="#luascope">LuaScope</a></li>
75 <li><img alt="" src="../images/down.gif" /> <a href="#basicconf">Basic Configuration</a></li>
76 <li><img alt="" src="../images/down.gif" /> <a href="#writinghandlers">Writing Handlers</a></li>
77 <li><img alt="" src="../images/down.gif" /> <a href="#writinghooks">Writing Hooks</a></li>
78 <li><img alt="" src="../images/down.gif" /> <a href="#datastructures">Data Structures</a></li>
79 <li><img alt="" src="../images/down.gif" /> <a href="#logging">Logging Functions</a></li>
80 <li><img alt="" src="../images/down.gif" /> <a href="#apache2">apache2 Package</a></li>
82 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
84 <h2><a name="basicconf" id="basicconf">Basic Configuration</a></h2>
86 <p>The basic module loading directive is</p>
88 <pre class="prettyprint lang-config">
89 LoadModule lua_module modules/mod_lua.so
94 <code>mod_lua</code> provides a handler named <code>lua-script</code>,
95 which can be used with an <code>AddHandler</code> directive:</p>
97 <pre class="prettyprint lang-config">
98 AddHandler lua-script .lua
103 This will cause <code>mod_lua</code> to handle requests for files
104 ending in <code>.lua</code> by invoking that file's
105 <code>handle</code> function.
108 <p>For more flexibility, see <code class="directive">LuaMapHandler</code>.
111 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
112 <div class="section">
113 <h2><a name="writinghandlers" id="writinghandlers">Writing Handlers</a></h2>
114 <p> In the Apache HTTP Server API, the handler is a specific kind of hook
115 responsible for generating the response. Examples of modules that include a
116 handler are <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>, <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>,
117 and <code class="module"><a href="../mod/mod_status.html">mod_status</a></code>.</p>
119 <p><code>mod_lua</code> always looks to invoke a Lua function for the handler, rather than
120 just evaluating a script body CGI style. A handler function looks
121 something like this:</p>
124 <pre class="prettyprint lang-lua">
125 <strong>example.lua</strong>
131 This is the default method name for Lua handlers, see the optional
132 function-name in the LuaMapHandler directive to choose a different
136 r.content_type = "text/plain"
137 r:puts("Hello Lua World!\n")
139 if r.method == 'GET' then
140 for k, v in pairs( r:parseargs() ) do
141 r:puts( string.format("%s: %s", k, v) )
143 elseif r.method == 'POST' then
144 for k, v in pairs( r:parsebody() ) do
145 r:puts( string.format("%s: %s", k, v) )
148 r:puts("unknown HTTP method " .. r.method)
155 This handler function just prints out the uri or form encoded
156 arguments to a plaintext page.
160 This means (and in fact encourages) that you can have multiple
161 handlers (or hooks, or filters) in the same script.
164 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
165 <div class="section">
166 <h2><a name="writinghooks" id="writinghooks">Writing Hooks</a></h2>
168 <p>Hook functions are how modules (and Lua scripts) participate in the
169 processing of requests. Each type of hook exposed by the server exists for
170 a specific purposes such as mapping requests to the filesystem,
171 performing access control, or setting mimetypes. General purpose hooks
172 that simply run at handy times in the request lifecycle exist as well.</p>
174 <p>Hook functions are passed the request object as their only argument.
175 They can return any value, depending on the hook, but most commonly
176 they'll return OK, DONE, or DECLINED, which you can write in lua as
177 <code>apache2.OK</code>, <code>apache2.DONE</code>, or
178 <code>apache2.DECLINED</code>, or else an HTTP status code.</p>
180 <pre class="prettyprint lang-lua">
181 <strong>translate_name.lua</strong>
182 -- example hook that rewrites the URI to a filesystem path.
186 function translate_name(r)
187 if r.uri == "/translate-name" then
188 r.filename = r.document_root .. "/find_me.txt"
191 -- we don't care about this URL, give another module a chance
192 return apache2.DECLINED
197 <pre class="prettyprint lang-lua">
198 <strong>translate_name2.lua</strong>
199 --[[ example hook that rewrites one URI to another URI. It returns a
200 apache2.DECLINED to give other URL mappers a chance to work on the
201 substitution, including the core translate_name hook which maps based
204 Note: It is currently undefined as to whether this runs before or after
210 function translate_name(r)
211 if r.uri == "/translate-name" then
212 r.uri = "/find_me.txt"
213 return apache2.DECLINED
215 return apache2.DECLINED
219 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
220 <div class="section">
221 <h2><a name="datastructures" id="datastructures">Data Structures</a></h2>
226 <p>The request_rec is mapped in as a userdata. It has a metatable
227 which lets you do useful things with it. For the most part it
228 has the same fields as the request_rec struct (see httpd.h
229 until we get better docs here) many of which are writeable as
230 well as readable. (The table fields' content can be changed, but the
231 fields themselves cannot be set to different tables.)</p>
233 <table class="bordered">
236 <th><strong>Name</strong></th>
237 <th><strong>Lua type</strong></th>
238 <th><strong>Writable</strong></th>
241 <td><code>ap_auth_type</code></td>
246 <td><code>args</code></td>
251 <td><code>assbackwards</code></td>
257 <td><code>canonical_filename</code></td>
262 <td><code>content_encoding</code></td>
267 <td><code>content_type</code></td>
273 <td><code>document_root</code></td>
278 <td><code>err_headers_out</code></td>
283 <td><code>filename</code></td>
288 <td><code>handler</code></td>
294 <td><code>headers_in</code></td>
299 <td><code>headers_out</code></td>
304 <td><code>hostname</code></td>
309 <td><code>method</code></td>
314 <td><code>notes</code></td>
319 <td><code>path_info</code></td>
324 <td><code>protocol</code></td>
329 <td><code>proxyreq</code></td>
334 <td><code>range</code></td>
339 <td><code>subprocess_env</code></td>
344 <td><code>status</code></td>
349 <td><code>the_request</code></td>
354 <td><code>unparsed_uri</code></td>
359 <td><code>uri</code></td>
364 <td><code>user</code></td>
370 <p>The request_rec has (at least) the following methods:</p>
372 <pre class="prettyprint lang-lua">
373 r:addoutputfilter(name|function) -- add an output filter
377 <pre class="prettyprint lang-lua">
378 r:parseargs() -- returns a lua table containing the request's query string arguments
382 <pre class="prettyprint lang-lua">
383 r:parsebody() -- parse the request body as a POST and return a lua table
387 <pre class="prettyprint lang-lua">
388 r:puts("hello", " world", "!") -- print to response body
392 <pre class="prettyprint lang-lua">
393 r:write("a single string") -- print to response body
399 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
400 <div class="section">
401 <h2><a name="logging" id="logging">Logging Functions</a></h2>
403 <pre class="prettyprint lang-lua">
404 -- examples of logging messages<br />
405 r:trace1("This is a trace log message") -- trace1 through trace8 can be used <br />
406 r:debug("This is a debug log message")<br />
407 r:info("This is an info log message")<br />
408 r:notice("This is an notice log message")<br />
409 r:warn("This is an warn log message")<br />
410 r:err("This is an err log message")<br />
411 r:alert("This is an alert log message")<br />
412 r:crit("This is an crit log message")<br />
413 r:emerg("This is an emerg log message")<br />
417 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
418 <div class="section">
419 <h2><a name="apache2" id="apache2">apache2 Package</a></h2>
420 <p>A package named <code>apache2</code> is available with (at least) the following contents.</p>
423 <dd>internal constant OK. Handlers should return this if they've
424 handled the request.</dd>
425 <dt>apache2.DECLINED</dt>
426 <dd>internal constant DECLINED. Handlers should return this if
427 they are not going to handle the request.</dd>
428 <dt>apache2.DONE</dt>
429 <dd>internal constant DONE.</dd>
430 <dt>apache2.version</dt>
431 <dd>Apache HTTP server version string</dd>
432 <dt>apache2.HTTP_MOVED_TEMPORARILY</dt>
433 <dd>HTTP status code</dd>
434 <dt>apache2.PROXYREQ_NONE, apache2.PROXYREQ_PROXY, apache2.PROXYREQ_REVERSE, apache2.PROXYREQ_RESPONSE</dt>
435 <dd>internal constants used by <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></dd>
437 <p>(Other HTTP status codes are not yet implemented.)</p>
439 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
440 <div class="directive-section"><h2><a name="LuaCodeCache" id="LuaCodeCache">LuaCodeCache</a> <a name="luacodecache" id="luacodecache">Directive</a></h2>
441 <table class="directive">
442 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configure the compiled code cache.</td></tr>
443 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaCodeCache stat|forever|never</code></td></tr>
444 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaCodeCache stat</code></td></tr>
445 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
446 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
447 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
448 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
450 Specify the behavior of the in-memory code cache. The default
451 is stat, which stats the top level script (not any included
452 ones) each time that file is needed, and reloads it if the
453 modified time indicates it is newer than the one it has
454 already loaded. The other values cause it to keep the file
455 cached forever (don't stat and replace) or to never cache the
458 <p>In general stat or forever is good for production, and stat or never
461 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
470 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
471 <div class="directive-section"><h2><a name="LuaHookAccessChecker" id="LuaHookAccessChecker">LuaHookAccessChecker</a> <a name="luahookaccesschecker" id="luahookaccesschecker">Directive</a></h2>
472 <table class="directive">
473 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the access_checker phase of request processing</td></tr>
474 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookAccessChecker /path/to/lua/script.lua hook_function_name [early|late]</code></td></tr>
475 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
476 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
477 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
478 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
479 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The optional third argument is supported in 2.3.15 and later</td></tr>
481 <p>Add your hook to the access_checker phase. An access checker
482 hook function usually returns OK, DECLINED, or HTTP_FORBIDDEN.</p>
483 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
484 control when this script runs relative to other modules.</p></div>
487 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
488 <div class="directive-section"><h2><a name="LuaHookAuthChecker" id="LuaHookAuthChecker">LuaHookAuthChecker</a> <a name="luahookauthchecker" id="luahookauthchecker">Directive</a></h2>
489 <table class="directive">
490 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the auth_checker phase of request processing</td></tr>
491 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookAuthChecker /path/to/lua/script.lua hook_function_name [early|late]</code></td></tr>
492 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
493 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
494 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
495 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
496 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The optional third argument is supported in 2.3.15 and later</td></tr>
498 <p>Invoke a lua function in the auth_checker phase of processing
499 a request. This can be used to implement arbitrary authentication
500 and authorization checking. A very simple example:
502 <pre class="prettyprint lang-lua">
505 -- fake authcheck hook
506 -- If request has no auth info, set the response header and
507 -- return a 401 to ask the browser for basic auth info.
508 -- If request has auth info, don't actually look at it, just
509 -- pretend we got userid 'foo' and validated it.
510 -- Then check if the userid is 'foo' and accept the request.
511 function authcheck_hook(r)
513 -- look for auth info
514 auth = r.headers_in['Authorization']
520 if r.user == nil then
521 r:debug("authcheck: user is nil, returning 401")
522 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
524 elseif r.user == "foo" then
525 r:debug('user foo: OK')
527 r:debug("authcheck: user='" .. r.user .. "'")
528 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
535 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
536 control when this script runs relative to other modules.</p></div>
539 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
540 <div class="directive-section"><h2><a name="LuaHookCheckUserID" id="LuaHookCheckUserID">LuaHookCheckUserID</a> <a name="luahookcheckuserid" id="luahookcheckuserid">Directive</a></h2>
541 <table class="directive">
542 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the check_user_id phase of request processing</td></tr>
543 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookCheckUserID /path/to/lua/script.lua hook_function_name [early|late]</code></td></tr>
544 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
545 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
546 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
547 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
548 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The optional third argument is supported in 2.3.15 and later</td></tr>
550 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
551 control when this script runs relative to other modules.</p></div>
554 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
555 <div class="directive-section"><h2><a name="LuaHookFixups" id="LuaHookFixups">LuaHookFixups</a> <a name="luahookfixups" id="luahookfixups">Directive</a></h2>
556 <table class="directive">
557 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the fixups phase of request
559 <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>
560 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
561 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
562 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
563 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
566 Just like LuaHookTranslateName, but executed at the fixups phase
570 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
571 <div class="directive-section"><h2><a name="LuaHookInsertFilter" id="LuaHookInsertFilter">LuaHookInsertFilter</a> <a name="luahookinsertfilter" id="luahookinsertfilter">Directive</a></h2>
572 <table class="directive">
573 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the insert_filter phase of request processing</td></tr>
574 <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>
575 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
576 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
577 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
578 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
579 </table><p>Not Yet Implemented</p>
581 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
582 <div class="directive-section"><h2><a name="LuaHookMapToStorage" id="LuaHookMapToStorage">LuaHookMapToStorage</a> <a name="luahookmaptostorage" id="luahookmaptostorage">Directive</a></h2>
583 <table class="directive">
584 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the map_to_storage phase of request processing</td></tr>
585 <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>
586 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
587 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
588 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
589 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
592 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
593 <div class="directive-section"><h2><a name="LuaHookTranslateName" id="LuaHookTranslateName">LuaHookTranslateName</a> <a name="luahooktranslatename" id="luahooktranslatename">Directive</a></h2>
594 <table class="directive">
595 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the translate name phase of request processing</td></tr>
596 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaHookTranslateName /path/to/lua/script.lua hook_function_name [early|late]</code></td></tr>
597 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
598 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
599 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
600 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
601 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The optional third argument is supported in 2.3.15 and later</td></tr>
603 Add a hook (at APR_HOOK_MIDDLE) to the translate name phase of
604 request processing. The hook function receives a single
605 argument, the request_rec, and should return a status code,
606 which is either an HTTP error code, or the constants defined
607 in the apache2 module: apache2.OK, apache2.DECLINED, or
610 <p>For those new to hooks, basically each hook will be invoked
611 until one of them returns apache2.OK. If your hook doesn't
612 want to do the translation it should just return
613 apache2.DECLINED. If the request should stop processing, then
614 return apache2.DONE.</p>
618 <pre class="prettyprint lang-config">
620 LuaHookTranslateName /scripts/conf/hooks.lua silly_mapper
624 <pre class="prettyprint lang-lua">
625 -- /scripts/conf/hooks.lua --
627 function silly_mapper(r)
629 r.filename = "/var/www/home.lua"
632 return apache2.DECLINED
638 <div class="note"><h3>Context</h3><p>This directive is not valid in <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code>, <code class="directive"><a href="../mod/core.html#files"><Files></a></code>, or htaccess
641 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
642 control when this script runs relative to other modules.</p></div>
646 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
647 <div class="directive-section"><h2><a name="LuaHookTypeChecker" id="LuaHookTypeChecker">LuaHookTypeChecker</a> <a name="luahooktypechecker" id="luahooktypechecker">Directive</a></h2>
648 <table class="directive">
649 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the type_checker phase of request processing</td></tr>
650 <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>
651 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
652 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
653 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
654 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
657 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
658 <div class="directive-section"><h2><a name="LuaInherit" id="LuaInherit">LuaInherit</a> <a name="luainherit" id="luainherit">Directive</a></h2>
659 <table class="directive">
660 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls how parent configuration sections are merged into children</td></tr>
661 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaInherit none|parent-first|parent-last</code></td></tr>
662 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaInherit parent-first</code></td></tr>
663 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
664 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
665 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
666 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
667 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.0 and later</td></tr>
668 </table><p>By default, if LuaHook* directives are used in overlapping
669 Directory or Location configuration sections, the scripts defined in the
670 more specific section are run <em>after</em> those defined in the more
671 generic section (LuaInherit parent-first). You can reverse this order, or
672 make the parent context not apply at all.</p>
674 <p> In previous 2.3.x releases, the default was effectively to ignore LuaHook*
675 directives from parent configuration sections.</p>
677 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
678 <div class="directive-section"><h2><a name="LuaMapHandler" id="LuaMapHandler">LuaMapHandler</a> <a name="luamaphandler" id="luamaphandler">Directive</a></h2>
679 <table class="directive">
680 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Map a path to a lua handler</td></tr>
681 <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>
682 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
683 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
684 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
685 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
687 <p>This directive matches a uri pattern to invoke a specific
688 handler function in a specific file. It uses PCRE regular
689 expressions to match the uri, and supports interpolating
690 match groups into both the file path and the function name
691 be careful writing your regular expressions to avoid security
693 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
694 LuaMapHandler /(\w+)/(/w+) /scripts/$1.lua handle_$2
697 <p>This would match uri's such as /photos/show?id=9
698 to the file /scripts/photos.lua and invoke the
699 handler function handle_show on the lua vm after
700 loading that file.</p>
702 <pre class="prettyprint lang-config">
703 LuaMapHandler /bingo /scripts/wombat.lua
706 <p>This would invoke the "handle" function, which
707 is the default if no specific function name is
711 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
712 <div class="directive-section"><h2><a name="LuaPackageCPath" id="LuaPackageCPath">LuaPackageCPath</a> <a name="luapackagecpath" id="luapackagecpath">Directive</a></h2>
713 <table class="directive">
714 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.cpath</td></tr>
715 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackageCPath /path/to/include/?.soa</code></td></tr>
716 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
717 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
718 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
719 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
721 <p>Add a path to lua's shared library search path. Follows the same
722 conventions as lua. This just munges the package.cpath in the
727 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
728 <div class="directive-section"><h2><a name="LuaPackagePath" id="LuaPackagePath">LuaPackagePath</a> <a name="luapackagepath" id="luapackagepath">Directive</a></h2>
729 <table class="directive">
730 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.path</td></tr>
731 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackagePath /path/to/include/?.lua</code></td></tr>
732 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
733 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
734 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
735 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
736 </table><p>Add a path to lua's module search path. Follows the same
737 conventions as lua. This just munges the package.path in the
740 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
741 LuaPackagePath /scripts/lib/?.lua
742 LuaPackagePath /scripts/lib/?/init.lua
747 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
748 <div class="directive-section"><h2><a name="LuaQuickHandler" id="LuaQuickHandler">LuaQuickHandler</a> <a name="luaquickhandler" id="luaquickhandler">Directive</a></h2>
749 <table class="directive">
750 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the quick handler of request processing</td></tr>
751 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code /></td></tr>
752 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
753 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
754 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
755 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
757 <div class="note"><h3>Context</h3><p>This directive is not valid in <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code>, <code class="directive"><a href="../mod/core.html#files"><Files></a></code>, or htaccess
761 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
762 <div class="directive-section"><h2><a name="LuaRoot" id="LuaRoot">LuaRoot</a> <a name="luaroot" id="luaroot">Directive</a></h2>
763 <table class="directive">
764 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify the base path for resolving relative paths for mod_lua directives</td></tr>
765 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaRoot /path/to/a/directory</code></td></tr>
766 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
767 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
768 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
769 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
771 <p>Specify the base path which will be used to evaluate all
772 relative paths within mod_lua. If not specified they
773 will be resolved relative to the current working directory,
774 which may not always work well for a server.</p>
777 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
778 <div class="directive-section"><h2><a name="LuaScope" id="LuaScope">LuaScope</a> <a name="luascope" id="luascope">Directive</a></h2>
779 <table class="directive">
780 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>One of once, request, conn, server -- default is once</td></tr>
781 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaScope once|request|conn|server [max|min max]</code></td></tr>
782 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaScope once</code></td></tr>
783 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
784 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
785 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
786 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
788 <p>Specify the lifecycle scope of the Lua interpreter which will
789 be used by handlers in this "Directory." The default is "once"</p>
792 <dt>once:</dt> <dd>use the interpreter once and throw it away.</dd>
794 <dt>request:</dt> <dd>use the interpreter to handle anything based on
795 the same file within this request, which is also
798 <dt>conn:</dt> <dd>Same as request but attached to the connection_rec</dd>
800 <dt>server:</dt> <dd>This one is different than others because the
801 server scope is quite long lived, and multiple threads
802 will have the same server_rec. To accommodate this
803 server scoped interpreter are stored in an apr
804 resource list. The min and max arguments are intended
805 to specify the pool size, but are unused at this time.</dd>
810 <div class="bottomlang">
811 <p><span>Available Languages: </span><a href="../en/mod/mod_lua.html" title="English"> en </a> |
812 <a href="../fr/mod/mod_lua.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
813 </div><div id="footer">
814 <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>
815 <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></div><script type="text/javascript">
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