diff options
Diffstat (limited to 'rubbos/app/apache2/manual/developer/modules.html.en')
| -rw-r--r-- | rubbos/app/apache2/manual/developer/modules.html.en | 273 |
1 files changed, 0 insertions, 273 deletions
diff --git a/rubbos/app/apache2/manual/developer/modules.html.en b/rubbos/app/apache2/manual/developer/modules.html.en deleted file mode 100644 index 176a94dd..00000000 --- a/rubbos/app/apache2/manual/developer/modules.html.en +++ /dev/null @@ -1,273 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> -<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - This file is generated from xml source: DO NOT EDIT - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --> -<title>Converting Modules from Apache 1.3 to Apache 2.0 - Apache HTTP Server</title> -<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> -<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> -<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /> -<link href="../images/favicon.ico" rel="shortcut icon" /></head> -<body id="manual-page"><div id="page-header"> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> -<p class="apache">Apache HTTP Server Version 2.0</p> -<img alt="" src="../images/feather.gif" /></div> -<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> -<div id="path"> -<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 2.0</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Converting Modules from Apache 1.3 to Apache 2.0</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../en/developer/modules.html" title="English"> en </a> | -<a href="../ja/developer/modules.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p> -</div> - - <p>This is a first attempt at writing the lessons I learned - when trying to convert the <code>mod_mmap_static</code> module to Apache - 2.0. It's by no means definitive and probably won't even be - correct in some ways, but it's a start.</p> -</div> -<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#easy">The easier changes ...</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#messy">The messier changes...</a></li> -</ul></div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="easy" id="easy">The easier changes ...</a></h2> - - <h3><a name="cleanup" id="cleanup">Cleanup Routines</a></h3> - <p>These now need to be of type <code>apr_status_t</code> and return a - value of that type. Normally the return value will be - <code>APR_SUCCESS</code> unless there is some need to signal an error in - the cleanup. Be aware that even though you signal an error not all code - yet checks and acts upon the error.</p> - - - <h3><a name="init" id="init">Initialisation Routines</a></h3> - <p>These should now be renamed to better signify where they sit - in the overall process. So the name gets a small change from - <code>mmap_init</code> to <code>mmap_post_config</code>. The arguments - passed have undergone a radical change and now look like</p> - - <ul> - <li><code>apr_pool_t *p</code></li> - <li><code>apr_pool_t *plog</code></li> - <li><code>apr_pool_t *ptemp</code></li> - <li><code>server_rec *s</code></li> - </ul> - - - <h3><a name="datatypes" id="datatypes">Data Types</a></h3> - <p>A lot of the data types have been moved into the <a href="http://apr.apache.org/">APR</a>. This means that some have had - a name change, such as the one shown above. The following is a brief - list of some of the changes that you are likely to have to make.</p> - - <ul> - <li><code>pool</code> becomes <code>apr_pool_t</code></li> - <li><code>table</code> becomes <code>apr_table_t</code></li> - </ul> - -</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="messy" id="messy">The messier changes...</a></h2> - - <h3><a name="register-hooks" id="register-hooks">Register Hooks</a></h3> - <p>The new architecture uses a series of hooks to provide for - calling your functions. These you'll need to add to your module - by way of a new function, <code>static void register_hooks(void)</code>. - The function is really reasonably straightforward once you - understand what needs to be done. Each function that needs - calling at some stage in the processing of a request needs to - be registered, handlers do not. There are a number of phases - where functions can be added, and for each you can specify with - a high degree of control the relative order that the function - will be called in.</p> - - <p>This is the code that was added to <code>mod_mmap_static</code>:</p> - <div class="example"><pre> -static void register_hooks(void) -{ - static const char * const aszPre[]={ "http_core.c",NULL }; - ap_hook_post_config(mmap_post_config,NULL,NULL,HOOK_MIDDLE); - ap_hook_translate_name(mmap_static_xlat,aszPre,NULL,HOOK_LAST); -};</pre></div> - - <p>This registers 2 functions that need to be called, one in - the <code>post_config</code> stage (virtually every module will need this - one) and one for the <code>translate_name</code> phase. note that while - there are different function names the format of each is - identical. So what is the format?</p> - - <div class="example"><p><code> - ap_hook_<var>phase_name</var>(<var>function_name</var>, - <var>predecessors</var>, <var>successors</var>, <var>position</var>); - </code></p></div> - - <p>There are 3 hook positions defined...</p> - - <ul> - <li><code>HOOK_FIRST</code></li> - <li><code>HOOK_MIDDLE</code></li> - <li><code>HOOK_LAST</code></li> - </ul> - - <p>To define the position you use the position and then modify - it with the predecessors and successors. Each of the modifiers - can be a list of functions that should be called, either before - the function is run (predecessors) or after the function has - run (successors).</p> - - <p>In the <code>mod_mmap_static</code> case I didn't care about the - <code>post_config</code> stage, but the <code>mmap_static_xlat</code> - <strong>must</strong> be called after the core module had done it's name - translation, hence the use of the aszPre to define a modifier to the - position <code>HOOK_LAST</code>.</p> - - - <h3><a name="moddef" id="moddef">Module Definition</a></h3> - <p>There are now a lot fewer stages to worry about when - creating your module definition. The old defintion looked - like</p> - - <div class="example"><pre> -module MODULE_VAR_EXPORT <var>module_name</var>_module = -{ - STANDARD_MODULE_STUFF, - /* initializer */ - /* dir config creater */ - /* dir merger --- default is to override */ - /* server config */ - /* merge server config */ - /* command handlers */ - /* handlers */ - /* filename translation */ - /* check_user_id */ - /* check auth */ - /* check access */ - /* type_checker */ - /* fixups */ - /* logger */ - /* header parser */ - /* child_init */ - /* child_exit */ - /* post read-request */ -};</pre></div> - - <p>The new structure is a great deal simpler...</p> - <div class="example"><pre> -module MODULE_VAR_EXPORT <var>module_name</var>_module = -{ - STANDARD20_MODULE_STUFF, - /* create per-directory config structures */ - /* merge per-directory config structures */ - /* create per-server config structures */ - /* merge per-server config structures */ - /* command handlers */ - /* handlers */ - /* register hooks */ -};</pre></div> - - <p>Some of these read directly across, some don't. I'll try to - summarise what should be done below.</p> - - <p>The stages that read directly across :</p> - - <dl> - <dt><code>/* dir config creater */</code></dt> - <dd><code>/* create per-directory config structures */</code></dd> - - <dt><code>/* server config */</code></dt> - <dd><code>/* create per-server config structures */</code></dd> - - <dt><code>/* dir merger */</code></dt> - <dd><code>/* merge per-directory config structures */</code></dd> - - <dt><code>/* merge server config */</code></dt> - <dd><code>/* merge per-server config structures */</code></dd> - - <dt><code>/* command table */</code></dt> - <dd><code>/* command apr_table_t */</code></dd> - - <dt><code>/* handlers */</code></dt> - <dd><code>/* handlers */</code></dd> - </dl> - - <p>The remainder of the old functions should be registered as - hooks. There are the following hook stages defined so - far...</p> - - <dl> - <dt><code>ap_hook_post_config</code></dt> - <dd>this is where the old <code>_init</code> routines get - registered</dd> - - <dt><code>ap_hook_http_method</code></dt> - <dd>retrieve the http method from a request. (legacy)</dd> - - <dt><code>ap_hook_open_logs</code></dt> - <dd>open any specified logs</dd> - - <dt><code>ap_hook_auth_checker</code></dt> - <dd>check if the resource requires authorization</dd> - - <dt><code>ap_hook_access_checker</code></dt> - <dd>check for module-specific restrictions</dd> - - <dt><code>ap_hook_check_user_id</code></dt> - <dd>check the user-id and password</dd> - - <dt><code>ap_hook_default_port</code></dt> - <dd>retrieve the default port for the server</dd> - - <dt><code>ap_hook_pre_connection</code></dt> - <dd>do any setup required just before processing, but after - accepting</dd> - - <dt><code>ap_hook_process_connection</code></dt> - <dd>run the correct protocol</dd> - - <dt><code>ap_hook_child_init</code></dt> - <dd>call as soon as the child is started</dd> - - <dt><code>ap_hook_create_request</code></dt> - <dd>??</dd> - - <dt><code>ap_hook_fixups</code></dt> - <dd>last chance to modify things before generating content</dd> - - <dt><code>ap_hook_handler</code></dt> - <dd>generate the content</dd> - - <dt><code>ap_hook_header_parser</code></dt> - <dd>lets modules look at the headers, not used by most modules, because - they use <code>post_read_request</code> for this</dd> - - <dt><code>ap_hook_insert_filter</code></dt> - <dd>to insert filters into the filter chain</dd> - - <dt><code>ap_hook_log_transaction</code></dt> - <dd>log information about the request</dd> - - <dt><code>ap_hook_optional_fn_retrieve</code></dt> - <dd>retrieve any functions registered as optional</dd> - - <dt><code>ap_hook_post_read_request</code></dt> - <dd>called after reading the request, before any other phase</dd> - - <dt><code>ap_hook_quick_handler</code></dt> - <dd>called before any request processing, used by cache modules.</dd> - - <dt><code>ap_hook_translate_name</code></dt> - <dd>translate the URI into a filename</dd> - - <dt><code>ap_hook_type_checker</code></dt> - <dd>determine and/or set the doc type</dd> - </dl> - -</div></div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../en/developer/modules.html" title="English"> en </a> | -<a href="../ja/developer/modules.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p> -</div><div id="footer"> -<p class="apache">Copyright 2009 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> -<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> -</body></html>
\ No newline at end of file |