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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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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="#luaauthzprovider">LuaAuthzProvider</a></li>
57 <li><img alt="" src="../images/down.gif" /> <a href="#luacodecache">LuaCodeCache</a></li>
58 <li><img alt="" src="../images/down.gif" /> <a href="#luahookaccesschecker">LuaHookAccessChecker</a></li>
59 <li><img alt="" src="../images/down.gif" /> <a href="#luahookauthchecker">LuaHookAuthChecker</a></li>
60 <li><img alt="" src="../images/down.gif" /> <a href="#luahookcheckuserid">LuaHookCheckUserID</a></li>
61 <li><img alt="" src="../images/down.gif" /> <a href="#luahookfixups">LuaHookFixups</a></li>
62 <li><img alt="" src="../images/down.gif" /> <a href="#luahookinsertfilter">LuaHookInsertFilter</a></li>
63 <li><img alt="" src="../images/down.gif" /> <a href="#luahookmaptostorage">LuaHookMapToStorage</a></li>
64 <li><img alt="" src="../images/down.gif" /> <a href="#luahooktranslatename">LuaHookTranslateName</a></li>
65 <li><img alt="" src="../images/down.gif" /> <a href="#luahooktypechecker">LuaHookTypeChecker</a></li>
66 <li><img alt="" src="../images/down.gif" /> <a href="#luainherit">LuaInherit</a></li>
67 <li><img alt="" src="../images/down.gif" /> <a href="#luamaphandler">LuaMapHandler</a></li>
68 <li><img alt="" src="../images/down.gif" /> <a href="#luapackagecpath">LuaPackageCPath</a></li>
69 <li><img alt="" src="../images/down.gif" /> <a href="#luapackagepath">LuaPackagePath</a></li>
70 <li><img alt="" src="../images/down.gif" /> <a href="#luaquickhandler">LuaQuickHandler</a></li>
71 <li><img alt="" src="../images/down.gif" /> <a href="#luaroot">LuaRoot</a></li>
72 <li><img alt="" src="../images/down.gif" /> <a href="#luascope">LuaScope</a></li>
76 <li><img alt="" src="../images/down.gif" /> <a href="#basicconf">Basic Configuration</a></li>
77 <li><img alt="" src="../images/down.gif" /> <a href="#writinghandlers">Writing Handlers</a></li>
78 <li><img alt="" src="../images/down.gif" /> <a href="#writingauthzproviders">Writing Authorization Providers</a></li>
79 <li><img alt="" src="../images/down.gif" /> <a href="#writinghooks">Writing Hooks</a></li>
80 <li><img alt="" src="../images/down.gif" /> <a href="#datastructures">Data Structures</a></li>
81 <li><img alt="" src="../images/down.gif" /> <a href="#logging">Logging Functions</a></li>
82 <li><img alt="" src="../images/down.gif" /> <a href="#apache2">apache2 Package</a></li>
83 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
84 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
86 <h2><a name="basicconf" id="basicconf">Basic Configuration</a></h2>
88 <p>The basic module loading directive is</p>
90 <pre class="prettyprint lang-config">
91 LoadModule lua_module modules/mod_lua.so
96 <code>mod_lua</code> provides a handler named <code>lua-script</code>,
97 which can be used with an <code>AddHandler</code> directive:</p>
99 <pre class="prettyprint lang-config">
100 AddHandler lua-script .lua
105 This will cause <code>mod_lua</code> to handle requests for files
106 ending in <code>.lua</code> by invoking that file's
107 <code>handle</code> function.
110 <p>For more flexibility, see <code class="directive">LuaMapHandler</code>.
113 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
114 <div class="section">
115 <h2><a name="writinghandlers" id="writinghandlers">Writing Handlers</a></h2>
116 <p> In the Apache HTTP Server API, the handler is a specific kind of hook
117 responsible for generating the response. Examples of modules that include a
118 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>,
119 and <code class="module"><a href="../mod/mod_status.html">mod_status</a></code>.</p>
121 <p><code>mod_lua</code> always looks to invoke a Lua function for the handler, rather than
122 just evaluating a script body CGI style. A handler function looks
123 something like this:</p>
126 <pre class="prettyprint lang-lua">
127 <strong>example.lua</strong>
133 This is the default method name for Lua handlers, see the optional
134 function-name in the LuaMapHandler directive to choose a different
138 r.content_type = "text/plain"
139 r:puts("Hello Lua World!\n")
141 if r.method == 'GET' then
142 for k, v in pairs( r:parseargs() ) do
143 r:puts( string.format("%s: %s\n", k, v) )
145 elseif r.method == 'POST' then
146 for k, v in pairs( r:parsebody() ) do
147 r:puts( string.format("%s: %s\n", k, v) )
150 r:puts("Unsupported HTTP method " .. r.method)
157 This handler function just prints out the uri or form encoded
158 arguments to a plaintext page.
162 This means (and in fact encourages) that you can have multiple
163 handlers (or hooks, or filters) in the same script.
166 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
167 <div class="section">
168 <h2><a name="writingauthzproviders" id="writingauthzproviders">Writing Authorization Providers</a></h2>
171 <p><code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code> provides a high-level interface to
172 authorization that is much easier to use than using into the relevant
173 hooks directly. The first argument to the
174 <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> directive gives
175 the name of the responsible authorization provider. For any
176 <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> line,
177 <code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code> will call the authorization provider
178 of the given name, passing the rest of the line as parameters. The
179 provider will then check authorization and pass the result as return
182 <p>The authz provider is normally called before authentication. If it needs to
183 know the authenticated user name (or if the user will be authenticated at
184 all), the provider must return <code>apache2.AUTHZ_DENIED_NO_USER</code>.
185 This will cause authentication to proceed and the authz provider to be
186 called a second time.</p>
188 <p>The following authz provider function takes two arguments, one ip
189 address and one user name. It will allow access from the given ip address
190 without authentication, or if the authenticated user matches the second
193 <pre class="prettyprint lang-lua">
194 <strong>authz_provider.lua</strong>
198 function authz_check_foo(r, ip, user)
199 if r.useragent_ip == ip then
200 return apache2.AUTHZ_GRANTED
201 elseif r.user == nil then
202 return apache2.AUTHZ_DENIED_NO_USER
203 elseif r.user == user then
204 return apache2.AUTHZ_GRANTED
206 return apache2.AUTHZ_DENIED
212 <p>The following configuration registers this function as provider
213 <code>foo</code> and configures it for URL <code>/</code>:</p>
214 <pre class="prettyprint lang-config">
215 LuaAuthzProvider foo authz_provider.lua authz_check_foo
217 Require foo 10.1.2.3 john_doe
222 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
223 <div class="section">
224 <h2><a name="writinghooks" id="writinghooks">Writing Hooks</a></h2>
226 <p>Hook functions are how modules (and Lua scripts) participate in the
227 processing of requests. Each type of hook exposed by the server exists for
228 a specific purposes such as mapping requests to the filesystem,
229 performing access control, or setting mimetypes. General purpose hooks
230 that simply run at handy times in the request lifecycle exist as well.</p>
232 <p>Hook functions are passed the request object as their only argument.
233 They can return any value, depending on the hook, but most commonly
234 they'll return OK, DONE, or DECLINED, which you can write in lua as
235 <code>apache2.OK</code>, <code>apache2.DONE</code>, or
236 <code>apache2.DECLINED</code>, or else an HTTP status code.</p>
238 <pre class="prettyprint lang-lua">
239 <strong>translate_name.lua</strong>
240 -- example hook that rewrites the URI to a filesystem path.
244 function translate_name(r)
245 if r.uri == "/translate-name" then
246 r.filename = r.document_root .. "/find_me.txt"
249 -- we don't care about this URL, give another module a chance
250 return apache2.DECLINED
255 <pre class="prettyprint lang-lua">
256 <strong>translate_name2.lua</strong>
257 --[[ example hook that rewrites one URI to another URI. It returns a
258 apache2.DECLINED to give other URL mappers a chance to work on the
259 substitution, including the core translate_name hook which maps based
262 Note: It is currently undefined as to whether this runs before or after
268 function translate_name(r)
269 if r.uri == "/translate-name" then
270 r.uri = "/find_me.txt"
271 return apache2.DECLINED
273 return apache2.DECLINED
277 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
278 <div class="section">
279 <h2><a name="datastructures" id="datastructures">Data Structures</a></h2>
284 <p>The request_rec is mapped in as a userdata. It has a metatable
285 which lets you do useful things with it. For the most part it
286 has the same fields as the request_rec struct (see httpd.h
287 until we get better docs here) many of which are writeable as
288 well as readable. (The table fields' content can be changed, but the
289 fields themselves cannot be set to different tables.)</p>
291 <table class="bordered">
294 <th><strong>Name</strong></th>
295 <th><strong>Lua type</strong></th>
296 <th><strong>Writable</strong></th>
299 <td><code>ap_auth_type</code></td>
304 <td><code>args</code></td>
309 <td><code>assbackwards</code></td>
315 <td><code>canonical_filename</code></td>
320 <td><code>content_encoding</code></td>
325 <td><code>content_type</code></td>
330 <td><code>context_prefix</code></td>
335 <td><code>context_document_root</code></td>
341 <td><code>document_root</code></td>
346 <td><code>err_headers_out</code></td>
351 <td><code>filename</code></td>
356 <td><code>handler</code></td>
362 <td><code>headers_in</code></td>
367 <td><code>headers_out</code></td>
372 <td><code>hostname</code></td>
377 <td><code>log_id</code></td>
382 <td><code>method</code></td>
387 <td><code>notes</code></td>
392 <td><code>path_info</code></td>
397 <td><code>protocol</code></td>
402 <td><code>proxyreq</code></td>
407 <td><code>range</code></td>
412 <td><code>subprocess_env</code></td>
417 <td><code>status</code></td>
422 <td><code>the_request</code></td>
427 <td><code>unparsed_uri</code></td>
432 <td><code>uri</code></td>
437 <td><code>user</code></td>
442 <td><code>useragent_ip</code></td>
448 <p>The request_rec has (at least) the following methods:</p>
450 <pre class="prettyprint lang-lua">
451 r:addoutputfilter(name|function) -- add an output filter
455 <pre class="prettyprint lang-lua">
456 r:parseargs() -- returns a Lua table containing the request's query string arguments
460 <pre class="prettyprint lang-lua">
461 r:parsebody() -- parse any POST data in the request and return it as a Lua table
465 <pre class="prettyprint lang-lua">
466 r:puts("hello", " world", "!") -- print to response body
470 <pre class="prettyprint lang-lua">
471 r:write("a single string") -- print to response body
477 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
478 <div class="section">
479 <h2><a name="logging" id="logging">Logging Functions</a></h2>
481 <pre class="prettyprint lang-lua">
482 -- examples of logging messages<br />
483 r:trace1("This is a trace log message") -- trace1 through trace8 can be used <br />
484 r:debug("This is a debug log message")<br />
485 r:info("This is an info log message")<br />
486 r:notice("This is an notice log message")<br />
487 r:warn("This is an warn log message")<br />
488 r:err("This is an err log message")<br />
489 r:alert("This is an alert log message")<br />
490 r:crit("This is an crit log message")<br />
491 r:emerg("This is an emerg log message")<br />
495 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
496 <div class="section">
497 <h2><a name="apache2" id="apache2">apache2 Package</a></h2>
498 <p>A package named <code>apache2</code> is available with (at least) the following contents.</p>
501 <dd>internal constant OK. Handlers should return this if they've
502 handled the request.</dd>
503 <dt>apache2.DECLINED</dt>
504 <dd>internal constant DECLINED. Handlers should return this if
505 they are not going to handle the request.</dd>
506 <dt>apache2.DONE</dt>
507 <dd>internal constant DONE.</dd>
508 <dt>apache2.version</dt>
509 <dd>Apache HTTP server version string</dd>
510 <dt>apache2.HTTP_MOVED_TEMPORARILY</dt>
511 <dd>HTTP status code</dd>
512 <dt>apache2.PROXYREQ_NONE, apache2.PROXYREQ_PROXY, apache2.PROXYREQ_REVERSE, apache2.PROXYREQ_RESPONSE</dt>
513 <dd>internal constants used by <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></dd>
515 <p>(Other HTTP status codes are not yet implemented.)</p>
517 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
518 <div class="directive-section"><h2><a name="LuaAuthzProvider" id="LuaAuthzProvider">LuaAuthzProvider</a> <a name="luaauthzprovider" id="luaauthzprovider">Directive</a></h2>
519 <table class="directive">
520 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Plug an authorization provider function into <code class="module"><a href="../mod/mod_authz_core.html">mod_authz_core</a></code>
522 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaAuthzProvider provider_name /path/to/lua/script.lua function_name</code></td></tr>
523 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
524 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
525 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
526 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.5.0 and later</td></tr>
528 <p>After a lua function has been registered as authorization provider, it can be used
529 with the <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> directive:</p>
531 <div class="example"><pre class="prettyprint lang-config">
532 LuaRoot /usr/local/apache2/lua
533 LuaAuthzProvider foo authz.lua authz_check_foo
542 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
543 <div class="directive-section"><h2><a name="LuaCodeCache" id="LuaCodeCache">LuaCodeCache</a> <a name="luacodecache" id="luacodecache">Directive</a></h2>
544 <table class="directive">
545 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configure the compiled code cache.</td></tr>
546 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaCodeCache stat|forever|never</code></td></tr>
547 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaCodeCache stat</code></td></tr>
548 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
549 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
550 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
551 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
553 Specify the behavior of the in-memory code cache. The default
554 is stat, which stats the top level script (not any included
555 ones) each time that file is needed, and reloads it if the
556 modified time indicates it is newer than the one it has
557 already loaded. The other values cause it to keep the file
558 cached forever (don't stat and replace) or to never cache the
561 <p>In general stat or forever is good for production, and stat or never
564 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
573 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
574 <div class="directive-section"><h2><a name="LuaHookAccessChecker" id="LuaHookAccessChecker">LuaHookAccessChecker</a> <a name="luahookaccesschecker" id="luahookaccesschecker">Directive</a></h2>
575 <table class="directive">
576 <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>
577 <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>
578 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
579 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
580 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
581 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
582 <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>
584 <p>Add your hook to the access_checker phase. An access checker
585 hook function usually returns OK, DECLINED, or HTTP_FORBIDDEN.</p>
586 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
587 control when this script runs relative to other modules.</p></div>
590 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
591 <div class="directive-section"><h2><a name="LuaHookAuthChecker" id="LuaHookAuthChecker">LuaHookAuthChecker</a> <a name="luahookauthchecker" id="luahookauthchecker">Directive</a></h2>
592 <table class="directive">
593 <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>
594 <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>
595 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
596 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
597 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
598 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
599 <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>
601 <p>Invoke a lua function in the auth_checker phase of processing
602 a request. This can be used to implement arbitrary authentication
603 and authorization checking. A very simple example:
605 <pre class="prettyprint lang-lua">
608 -- fake authcheck hook
609 -- If request has no auth info, set the response header and
610 -- return a 401 to ask the browser for basic auth info.
611 -- If request has auth info, don't actually look at it, just
612 -- pretend we got userid 'foo' and validated it.
613 -- Then check if the userid is 'foo' and accept the request.
614 function authcheck_hook(r)
616 -- look for auth info
617 auth = r.headers_in['Authorization']
623 if r.user == nil then
624 r:debug("authcheck: user is nil, returning 401")
625 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
627 elseif r.user == "foo" then
628 r:debug('user foo: OK')
630 r:debug("authcheck: user='" .. r.user .. "'")
631 r.err_headers_out['WWW-Authenticate'] = 'Basic realm="WallyWorld"'
638 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
639 control when this script runs relative to other modules.</p></div>
642 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
643 <div class="directive-section"><h2><a name="LuaHookCheckUserID" id="LuaHookCheckUserID">LuaHookCheckUserID</a> <a name="luahookcheckuserid" id="luahookcheckuserid">Directive</a></h2>
644 <table class="directive">
645 <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>
646 <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>
647 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
648 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
649 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
650 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
651 <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>
653 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
654 control when this script runs relative to other modules.</p></div>
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="LuaHookFixups" id="LuaHookFixups">LuaHookFixups</a> <a name="luahookfixups" id="luahookfixups">Directive</a></h2>
659 <table class="directive">
660 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the fixups phase of request
662 <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>
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>
669 Just like LuaHookTranslateName, but executed at the fixups phase
673 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
674 <div class="directive-section"><h2><a name="LuaHookInsertFilter" id="LuaHookInsertFilter">LuaHookInsertFilter</a> <a name="luahookinsertfilter" id="luahookinsertfilter">Directive</a></h2>
675 <table class="directive">
676 <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>
677 <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>
678 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
679 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
680 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
681 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
682 </table><p>Not Yet Implemented</p>
684 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
685 <div class="directive-section"><h2><a name="LuaHookMapToStorage" id="LuaHookMapToStorage">LuaHookMapToStorage</a> <a name="luahookmaptostorage" id="luahookmaptostorage">Directive</a></h2>
686 <table class="directive">
687 <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>
688 <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>
689 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
690 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
691 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
692 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
695 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
696 <div class="directive-section"><h2><a name="LuaHookTranslateName" id="LuaHookTranslateName">LuaHookTranslateName</a> <a name="luahooktranslatename" id="luahooktranslatename">Directive</a></h2>
697 <table class="directive">
698 <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>
699 <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>
700 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
701 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
702 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
703 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
704 <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>
706 Add a hook (at APR_HOOK_MIDDLE) to the translate name phase of
707 request processing. The hook function receives a single
708 argument, the request_rec, and should return a status code,
709 which is either an HTTP error code, or the constants defined
710 in the apache2 module: apache2.OK, apache2.DECLINED, or
713 <p>For those new to hooks, basically each hook will be invoked
714 until one of them returns apache2.OK. If your hook doesn't
715 want to do the translation it should just return
716 apache2.DECLINED. If the request should stop processing, then
717 return apache2.DONE.</p>
721 <pre class="prettyprint lang-config">
723 LuaHookTranslateName /scripts/conf/hooks.lua silly_mapper
727 <pre class="prettyprint lang-lua">
728 -- /scripts/conf/hooks.lua --
730 function silly_mapper(r)
732 r.filename = "/var/www/home.lua"
735 return apache2.DECLINED
741 <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
744 <div class="note"><h3>Ordering</h3><p>The optional arguments "early" or "late"
745 control when this script runs relative to other modules.</p></div>
749 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
750 <div class="directive-section"><h2><a name="LuaHookTypeChecker" id="LuaHookTypeChecker">LuaHookTypeChecker</a> <a name="luahooktypechecker" id="luahooktypechecker">Directive</a></h2>
751 <table class="directive">
752 <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>
753 <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>
754 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
755 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
756 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
757 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
760 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
761 <div class="directive-section"><h2><a name="LuaInherit" id="LuaInherit">LuaInherit</a> <a name="luainherit" id="luainherit">Directive</a></h2>
762 <table class="directive">
763 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls how parent configuration sections are merged into children</td></tr>
764 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaInherit none|parent-first|parent-last</code></td></tr>
765 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaInherit parent-first</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>
770 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.0 and later</td></tr>
771 </table><p>By default, if LuaHook* directives are used in overlapping
772 Directory or Location configuration sections, the scripts defined in the
773 more specific section are run <em>after</em> those defined in the more
774 generic section (LuaInherit parent-first). You can reverse this order, or
775 make the parent context not apply at all.</p>
777 <p> In previous 2.3.x releases, the default was effectively to ignore LuaHook*
778 directives from parent configuration sections.</p>
780 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
781 <div class="directive-section"><h2><a name="LuaMapHandler" id="LuaMapHandler">LuaMapHandler</a> <a name="luamaphandler" id="luamaphandler">Directive</a></h2>
782 <table class="directive">
783 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Map a path to a lua handler</td></tr>
784 <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>
785 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
786 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
787 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
788 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
790 <p>This directive matches a uri pattern to invoke a specific
791 handler function in a specific file. It uses PCRE regular
792 expressions to match the uri, and supports interpolating
793 match groups into both the file path and the function name
794 be careful writing your regular expressions to avoid security
796 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
797 LuaMapHandler /(\w+)/(\w+) /scripts/$1.lua handle_$2
800 <p>This would match uri's such as /photos/show?id=9
801 to the file /scripts/photos.lua and invoke the
802 handler function handle_show on the lua vm after
803 loading that file.</p>
805 <pre class="prettyprint lang-config">
806 LuaMapHandler /bingo /scripts/wombat.lua
809 <p>This would invoke the "handle" function, which
810 is the default if no specific function name is
814 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
815 <div class="directive-section"><h2><a name="LuaPackageCPath" id="LuaPackageCPath">LuaPackageCPath</a> <a name="luapackagecpath" id="luapackagecpath">Directive</a></h2>
816 <table class="directive">
817 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.cpath</td></tr>
818 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackageCPath /path/to/include/?.soa</code></td></tr>
819 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
820 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
821 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
822 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
824 <p>Add a path to lua's shared library search path. Follows the same
825 conventions as lua. This just munges the package.cpath in the
830 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
831 <div class="directive-section"><h2><a name="LuaPackagePath" id="LuaPackagePath">LuaPackagePath</a> <a name="luapackagepath" id="luapackagepath">Directive</a></h2>
832 <table class="directive">
833 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Add a directory to lua's package.path</td></tr>
834 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaPackagePath /path/to/include/?.lua</code></td></tr>
835 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
836 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
837 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
838 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
839 </table><p>Add a path to lua's module search path. Follows the same
840 conventions as lua. This just munges the package.path in the
843 <div class="example"><h3>Examples:</h3><pre class="prettyprint lang-config">
844 LuaPackagePath /scripts/lib/?.lua
845 LuaPackagePath /scripts/lib/?/init.lua
850 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
851 <div class="directive-section"><h2><a name="LuaQuickHandler" id="LuaQuickHandler">LuaQuickHandler</a> <a name="luaquickhandler" id="luaquickhandler">Directive</a></h2>
852 <table class="directive">
853 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Provide a hook for the quick handler of request processing</td></tr>
854 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code /></td></tr>
855 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
856 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
857 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
858 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
860 <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
864 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
865 <div class="directive-section"><h2><a name="LuaRoot" id="LuaRoot">LuaRoot</a> <a name="luaroot" id="luaroot">Directive</a></h2>
866 <table class="directive">
867 <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>
868 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaRoot /path/to/a/directory</code></td></tr>
869 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
870 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
871 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
872 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
874 <p>Specify the base path which will be used to evaluate all
875 relative paths within mod_lua. If not specified they
876 will be resolved relative to the current working directory,
877 which may not always work well for a server.</p>
880 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
881 <div class="directive-section"><h2><a name="LuaScope" id="LuaScope">LuaScope</a> <a name="luascope" id="luascope">Directive</a></h2>
882 <table class="directive">
883 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>One of once, request, conn, server -- default is once</td></tr>
884 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>LuaScope once|request|conn|server [max|min max]</code></td></tr>
885 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>LuaScope once</code></td></tr>
886 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
887 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>All</td></tr>
888 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
889 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_lua</td></tr>
891 <p>Specify the lifecycle scope of the Lua interpreter which will
892 be used by handlers in this "Directory." The default is "once"</p>
895 <dt>once:</dt> <dd>use the interpreter once and throw it away.</dd>
897 <dt>request:</dt> <dd>use the interpreter to handle anything based on
898 the same file within this request, which is also
901 <dt>conn:</dt> <dd>Same as request but attached to the connection_rec</dd>
903 <dt>server:</dt> <dd>This one is different than others because the
904 server scope is quite long lived, and multiple threads
905 will have the same server_rec. To accommodate this
906 server scoped interpreter are stored in an apr
907 resource list. The min and max arguments are intended
908 to specify the pool size, but are unused at this time.</dd>
913 <div class="bottomlang">
914 <p><span>Available Languages: </span><a href="../en/mod/mod_lua.html" title="English"> en </a> |
915 <a href="../fr/mod/mod_lua.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
916 </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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