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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="http://wiki.apache.org/httpd/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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21 <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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>
81 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
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\n", k, v) )
144 r:puts("Unsupported HTTP method " .. r.method)
151 This handler function just prints out the uri or form encoded
152 arguments to a plaintext page.
156 This means (and in fact encourages) that you can have multiple
157 handlers (or hooks, or filters) in the same script.
160 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
161 <div class="section">
162 <h2><a name="writinghooks" id="writinghooks">Writing Hooks</a></h2>
164 <p>Hook functions are how modules (and Lua scripts) participate in the
165 processing of requests. Each type of hook exposed by the server exists for
166 a specific purposes such as mapping requests to the filesystem,
167 performing access control, or setting mimetypes. General purpose hooks
168 that simply run at handy times in the request lifecycle exist as well.</p>
170 <p>Hook functions are passed the request object as their only argument.
171 They can return any value, depending on the hook, but most commonly
172 they'll return OK, DONE, or DECLINED, which you can write in lua as
173 <code>apache2.OK</code>, <code>apache2.DONE</code>, or
174 <code>apache2.DECLINED</code>, or else an HTTP status code.</p>
176 <pre class="prettyprint lang-lua">
177 <strong>translate_name.lua</strong>
178 -- example hook that rewrites the URI to a filesystem path.
182 function translate_name(r)
183 if r.uri == "/translate-name" then
184 r.filename = r.document_root .. "/find_me.txt"
187 -- we don't care about this URL, give another module a chance
188 return apache2.DECLINED
193 <pre class="prettyprint lang-lua">
194 <strong>translate_name2.lua</strong>
195 --[[ example hook that rewrites one URI to another URI. It returns a
196 apache2.DECLINED to give other URL mappers a chance to work on the
197 substitution, including the core translate_name hook which maps based
200 Note: It is currently undefined as to whether this runs before or after
206 function translate_name(r)
207 if r.uri == "/translate-name" then
208 r.uri = "/find_me.txt"
209 return apache2.DECLINED
211 return apache2.DECLINED
215 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
216 <div class="section">
217 <h2><a name="datastructures" id="datastructures">Data Structures</a></h2>
222 <p>The request_rec is mapped in as a userdata. It has a metatable
223 which lets you do useful things with it. For the most part it
224 has the same fields as the request_rec struct (see httpd.h
225 until we get better docs here) many of which are writeable as
226 well as readable. (The table fields' content can be changed, but the
227 fields themselves cannot be set to different tables.)</p>
229 <table class="bordered">
232 <th><strong>Name</strong></th>
233 <th><strong>Lua type</strong></th>
234 <th><strong>Writable</strong></th>
237 <td><code>ap_auth_type</code></td>
242 <td><code>args</code></td>
247 <td><code>assbackwards</code></td>
253 <td><code>canonical_filename</code></td>
258 <td><code>content_encoding</code></td>
263 <td><code>content_type</code></td>
269 <td><code>document_root</code></td>
274 <td><code>err_headers_out</code></td>
279 <td><code>filename</code></td>
284 <td><code>handler</code></td>
290 <td><code>headers_in</code></td>
295 <td><code>headers_out</code></td>
300 <td><code>hostname</code></td>
305 <td><code>method</code></td>
310 <td><code>notes</code></td>
315 <td><code>path_info</code></td>
320 <td><code>protocol</code></td>
325 <td><code>proxyreq</code></td>
330 <td><code>range</code></td>
335 <td><code>subprocess_env</code></td>
340 <td><code>status</code></td>
345 <td><code>the_request</code></td>
350 <td><code>unparsed_uri</code></td>
355 <td><code>uri</code></td>
360 <td><code>user</code></td>
366 <p>The request_rec has (at least) the following methods:</p>
368 <pre class="prettyprint lang-lua">
369 r:addoutputfilter(name|function) -- add an output filter
373 <pre class="prettyprint lang-lua">
374 r:parseargs() -- returns a lua table containing the request's query string arguments
378 <pre class="prettyprint lang-lua">
379 r:puts("hello", " world", "!") -- print to response body
383 <pre class="prettyprint lang-lua">
384 r:write("a single string") -- print to response body
390 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
391 <div class="section">
392 <h2><a name="logging" id="logging">Logging Functions</a></h2>
394 <pre class="prettyprint lang-lua">
395 -- examples of logging messages<br />
396 r:trace1("This is a trace log message") -- trace1 through trace8 can be used <br />
397 r:debug("This is a debug log message")<br />
398 r:info("This is an info log message")<br />
399 r:notice("This is an notice log message")<br />
400 r:warn("This is an warn log message")<br />
401 r:err("This is an err log message")<br />
402 r:alert("This is an alert log message")<br />
403 r:crit("This is an crit log message")<br />
404 r:emerg("This is an emerg log message")<br />
408 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
409 <div class="section">
410 <h2><a name="apache2" id="apache2">apache2 Package</a></h2>
411 <p>A package named <code>apache2</code> is available with (at least) the following contents.</p>
414 <dd>internal constant OK. Handlers should return this if they've
415 handled the request.</dd>
416 <dt>apache2.DECLINED</dt>
417 <dd>internal constant DECLINED. Handlers should return this if
418 they are not going to handle the request.</dd>
419 <dt>apache2.DONE</dt>
420 <dd>internal constant DONE.</dd>
421 <dt>apache2.version</dt>
422 <dd>Apache HTTP server version string</dd>
423 <dt>apache2.HTTP_MOVED_TEMPORARILY</dt>
424 <dd>HTTP status code</dd>
425 <dt>apache2.PROXYREQ_NONE, apache2.PROXYREQ_PROXY, apache2.PROXYREQ_REVERSE, apache2.PROXYREQ_RESPONSE</dt>
426 <dd>internal constants used by <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></dd>
428 <p>(Other HTTP status codes are not yet implemented.)</p>
430 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
431 <div class="directive-section"><h2><a name="LuaCodeCache" id="LuaCodeCache">LuaCodeCache</a> <a name="luacodecache" id="luacodecache">Directive</a></h2>
432 <table class="directive">
433 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configure the compiled code cache.</td></tr>
434 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaCodeCache stat|forever|never</code></td></tr>
435 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaCodeCache stat</code></td></tr>
436 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
437 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
438 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
439 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
441 Specify the behavior of the in-memory code cache. The default
442 is stat, which stats the top level script (not any included
443 ones) each time that file is needed, and reloads it if the
444 modified time indicates it is newer than the one it has
445 already loaded. The other values cause it to keep the file
446 cached forever (don't stat and replace) or to never cache the
449 <p>In general stat or forever is good for production, and stat or never
452 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
461 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
462 <div class="directive-section"><h2><a name="LuaHookAccessChecker" id="LuaHookAccessChecker">LuaHookAccessChecker</a> <a name="luahookaccesschecker" id="luahookaccesschecker">Directive</a></h2>
463 <table class="directive">
464 <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>
465 <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>
466 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
467 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
468 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
469 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
470 <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>
472 <p>Add your hook to the access_checker phase. An access checker
473 hook function usually returns OK, DECLINED, or HTTP_FORBIDDEN.</p>
474 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
475 control when this script runs relative to other modules.</p></div>
478 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
479 <div class="directive-section"><h2><a name="LuaHookAuthChecker" id="LuaHookAuthChecker">LuaHookAuthChecker</a> <a name="luahookauthchecker" id="luahookauthchecker">Directive</a></h2>
480 <table class="directive">
481 <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>
482 <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>
483 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
484 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
485 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
486 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
487 <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>
489 <p>Invoke a lua function in the auth_checker phase of processing
490 a request. This can be used to implement arbitrary authentication
491 and authorization checking. A very simple example:
493 <pre class="prettyprint lang-lua">
496 -- fake authcheck hook
497 -- If request has no auth info, set the response header and
498 -- return a 401 to ask the browser for basic auth info.
499 -- If request has auth info, don't actually look at it, just
500 -- pretend we got userid 'foo' and validated it.
501 -- Then check if the userid is 'foo' and accept the request.
502 function authcheck_hook(r)
504 -- look for auth info
505 auth = r.headers_in['Authorization']
511 if r.user == nil then
512 r:debug("authcheck: user is nil, returning 401")
513 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
515 elseif r.user == "foo" then
516 r:debug('user foo: OK')
518 r:debug("authcheck: user='" .. r.user .. "'")
519 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
526 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
527 control when this script runs relative to other modules.</p></div>
530 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
531 <div class="directive-section"><h2><a name="LuaHookCheckUserID" id="LuaHookCheckUserID">LuaHookCheckUserID</a> <a name="luahookcheckuserid" id="luahookcheckuserid">Directive</a></h2>
532 <table class="directive">
533 <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>
534 <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>
535 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
536 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
537 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
538 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
539 <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>
541 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
542 control when this script runs relative to other modules.</p></div>
545 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
546 <div class="directive-section"><h2><a name="LuaHookFixups" id="LuaHookFixups">LuaHookFixups</a> <a name="luahookfixups" id="luahookfixups">Directive</a></h2>
547 <table class="directive">
548 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the fixups phase of request
550 <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>
551 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
552 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
553 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
554 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
557 Just like LuaHookTranslateName, but executed at the fixups phase
561 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
562 <div class="directive-section"><h2><a name="LuaHookInsertFilter" id="LuaHookInsertFilter">LuaHookInsertFilter</a> <a name="luahookinsertfilter" id="luahookinsertfilter">Directive</a></h2>
563 <table class="directive">
564 <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>
565 <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>
566 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
567 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
568 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
569 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
570 </table><p>Not Yet Implemented</p>
572 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
573 <div class="directive-section"><h2><a name="LuaHookMapToStorage" id="LuaHookMapToStorage">LuaHookMapToStorage</a> <a name="luahookmaptostorage" id="luahookmaptostorage">Directive</a></h2>
574 <table class="directive">
575 <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>
576 <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>
577 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
578 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
579 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
580 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
583 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
584 <div class="directive-section"><h2><a name="LuaHookTranslateName" id="LuaHookTranslateName">LuaHookTranslateName</a> <a name="luahooktranslatename" id="luahooktranslatename">Directive</a></h2>
585 <table class="directive">
586 <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>
587 <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>
588 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
589 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
590 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
591 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
592 <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>
594 Add a hook (at APR_HOOK_MIDDLE) to the translate name phase of
595 request processing. The hook function receives a single
596 argument, the request_rec, and should return a status code,
597 which is either an HTTP error code, or the constants defined
598 in the apache2 module: apache2.OK, apache2.DECLINED, or
601 <p>For those new to hooks, basically each hook will be invoked
602 until one of them returns apache2.OK. If your hook doesn't
603 want to do the translation it should just return
604 apache2.DECLINED. If the request should stop processing, then
605 return apache2.DONE.</p>
609 <pre class="prettyprint lang-config">
611 LuaHookTranslateName /scripts/conf/hooks.lua silly_mapper
615 <pre class="prettyprint lang-lua">
616 -- /scripts/conf/hooks.lua --
618 function silly_mapper(r)
620 r.filename = "/var/www/home.lua"
623 return apache2.DECLINED
629 <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
632 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
633 control when this script runs relative to other modules.</p></div>
637 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
638 <div class="directive-section"><h2><a name="LuaHookTypeChecker" id="LuaHookTypeChecker">LuaHookTypeChecker</a> <a name="luahooktypechecker" id="luahooktypechecker">Directive</a></h2>
639 <table class="directive">
640 <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>
641 <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>
642 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
643 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
644 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
645 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
648 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
649 <div class="directive-section"><h2><a name="LuaInherit" id="LuaInherit">LuaInherit</a> <a name="luainherit" id="luainherit">Directive</a></h2>
650 <table class="directive">
651 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls how parent configuration sections are merged into children</td></tr>
652 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaInherit none|parent-first|parent-last</code></td></tr>
653 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaInherit parent-first</code></td></tr>
654 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
655 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
656 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
657 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
658 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.0 and later</td></tr>
659 </table><p>By default, if LuaHook* directives are used in overlapping
660 Directory or Location configuration sections, the scripts defined in the
661 more specific section are run <em>after</em> those defined in the more
662 generic section (LuaInherit parent-first). You can reverse this order, or
663 make the parent context not apply at all.</p>
665 <p> In previous 2.3.x releases, the default was effectively to ignore LuaHook*
666 directives from parent configuration sections.</p>
668 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
669 <div class="directive-section"><h2><a name="LuaMapHandler" id="LuaMapHandler">LuaMapHandler</a> <a name="luamaphandler" id="luamaphandler">Directive</a></h2>
670 <table class="directive">
671 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Map a path to a lua handler</td></tr>
672 <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>
673 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
674 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
675 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
676 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
678 <p>This directive matches a uri pattern to invoke a specific
679 handler function in a specific file. It uses PCRE regular
680 expressions to match the uri, and supports interpolating
681 match groups into both the file path and the function name
682 be careful writing your regular expressions to avoid security
684 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
685 LuaMapHandler /(\w+)/(\w+) /scripts/$1.lua handle_$2
688 <p>This would match uri's such as /photos/show?id=9
689 to the file /scripts/photos.lua and invoke the
690 handler function handle_show on the lua vm after
691 loading that file.</p>
693 <pre class="prettyprint lang-config">
694 LuaMapHandler /bingo /scripts/wombat.lua
697 <p>This would invoke the "handle" function, which
698 is the default if no specific function name is
702 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
703 <div class="directive-section"><h2><a name="LuaPackageCPath" id="LuaPackageCPath">LuaPackageCPath</a> <a name="luapackagecpath" id="luapackagecpath">Directive</a></h2>
704 <table class="directive">
705 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.cpath</td></tr>
706 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackageCPath /path/to/include/?.soa</code></td></tr>
707 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
708 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
709 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
710 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
712 <p>Add a path to lua's shared library search path. Follows the same
713 conventions as lua. This just munges the package.cpath in the
718 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
719 <div class="directive-section"><h2><a name="LuaPackagePath" id="LuaPackagePath">LuaPackagePath</a> <a name="luapackagepath" id="luapackagepath">Directive</a></h2>
720 <table class="directive">
721 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.path</td></tr>
722 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackagePath /path/to/include/?.lua</code></td></tr>
723 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
724 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
725 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
726 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
727 </table><p>Add a path to lua's module search path. Follows the same
728 conventions as lua. This just munges the package.path in the
731 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
732 LuaPackagePath /scripts/lib/?.lua
733 LuaPackagePath /scripts/lib/?/init.lua
738 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
739 <div class="directive-section"><h2><a name="LuaQuickHandler" id="LuaQuickHandler">LuaQuickHandler</a> <a name="luaquickhandler" id="luaquickhandler">Directive</a></h2>
740 <table class="directive">
741 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the quick handler of request processing</td></tr>
742 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code /></td></tr>
743 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
744 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
745 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
746 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
748 <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
752 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
753 <div class="directive-section"><h2><a name="LuaRoot" id="LuaRoot">LuaRoot</a> <a name="luaroot" id="luaroot">Directive</a></h2>
754 <table class="directive">
755 <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>
756 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaRoot /path/to/a/directory</code></td></tr>
757 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
758 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
759 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
760 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
762 <p>Specify the base path which will be used to evaluate all
763 relative paths within mod_lua. If not specified they
764 will be resolved relative to the current working directory,
765 which may not always work well for a server.</p>
768 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
769 <div class="directive-section"><h2><a name="LuaScope" id="LuaScope">LuaScope</a> <a name="luascope" id="luascope">Directive</a></h2>
770 <table class="directive">
771 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>One of once, request, conn, server -- default is once</td></tr>
772 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaScope once|request|conn|server [max|min max]</code></td></tr>
773 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaScope once</code></td></tr>
774 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
775 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
776 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
777 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
779 <p>Specify the lifecycle scope of the Lua interpreter which will
780 be used by handlers in this "Directory." The default is "once"</p>
783 <dt>once:</dt> <dd>use the interpreter once and throw it away.</dd>
785 <dt>request:</dt> <dd>use the interpreter to handle anything based on
786 the same file within this request, which is also
789 <dt>conn:</dt> <dd>Same as request but attached to the connection_rec</dd>
791 <dt>server:</dt> <dd>This one is different than others because the
792 server scope is quite long lived, and multiple threads
793 will have the same server_rec. To accommodate this
794 server scoped interpreter are stored in an apr
795 resource list. The min and max arguments are intended
796 to specify the pool size, but are unused at this time.</dd>
801 <div class="bottomlang">
802 <p><span>Available Languages: </span><a href="../en/mod/mod_lua.html" title="English"> en </a> |
803 <a href="../fr/mod/mod_lua.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
804 </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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