diff options
| author | Arno Töll <arno@debian.org> | 2012-10-20 02:58:14 +0200 |
|---|---|---|
| committer | Arno Töll <arno@debian.org> | 2012-10-20 02:58:14 +0200 |
| commit | 5c4fba3ffbe778bdffe10a93d04821579601a020 (patch) | |
| tree | 91be9a7f99d3988ba48b0a619479aa46a3234191 /docs/manual/developer | |
| parent | 8f9c15530d0bc387af114619b3ff3f930eb23d3c (diff) | |
| download | apache2-5c4fba3ffbe778bdffe10a93d04821579601a020.tar.gz | |
Imported Upstream version 2.4.3upstream/2.4.3
Diffstat (limited to 'docs/manual/developer')
| -rw-r--r-- | docs/manual/developer/API.html.en | 34 | ||||
| -rw-r--r-- | docs/manual/developer/debugging.html.en | 32 | ||||
| -rw-r--r-- | docs/manual/developer/documenting.html.en | 38 | ||||
| -rw-r--r-- | docs/manual/developer/documenting.html.zh-cn | 32 | ||||
| -rw-r--r-- | docs/manual/developer/filters.html.en | 34 | ||||
| -rw-r--r-- | docs/manual/developer/hooks.html.en | 175 | ||||
| -rw-r--r-- | docs/manual/developer/index.html.en | 50 | ||||
| -rw-r--r-- | docs/manual/developer/index.html.zh-cn | 13 | ||||
| -rw-r--r-- | docs/manual/developer/modguide.html | 5 | ||||
| -rw-r--r-- | docs/manual/developer/modguide.html.en | 1791 | ||||
| -rw-r--r-- | docs/manual/developer/modules.html.en | 36 | ||||
| -rw-r--r-- | docs/manual/developer/modules.html.ja.utf8 | 34 | ||||
| -rw-r--r-- | docs/manual/developer/new_api_2_4.html.en | 51 | ||||
| -rw-r--r-- | docs/manual/developer/output-filters.html.en | 227 | ||||
| -rw-r--r-- | docs/manual/developer/request.html.en | 55 | ||||
| -rw-r--r-- | docs/manual/developer/thread_safety.html.en | 42 |
16 files changed, 2379 insertions, 270 deletions
diff --git a/docs/manual/developer/API.html.en b/docs/manual/developer/API.html.en index b69d65d9..3f728dd2 100644 --- a/docs/manual/developer/API.html.en +++ b/docs/manual/developer/API.html.en @@ -8,10 +8,13 @@ <title>Apache 1.3 API notes - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -105,7 +108,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#handlers">How handlers work</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#pools">Resource allocation and resource pools</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#config">Configuration, commands and the like</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="basics" id="basics">Basic concepts</a></h2> @@ -1216,7 +1219,28 @@ void *request_config; /* Notes on *this* request */</pre><p><code> </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/API.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/API.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/debugging.html.en b/docs/manual/developer/debugging.html.en index 208559e8..7c9a895b 100644 --- a/docs/manual/developer/debugging.html.en +++ b/docs/manual/developer/debugging.html.en @@ -8,10 +8,13 @@ <title>Debugging Memory Allocation in APR - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body id="manual-page" class="no-sidebar"><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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -28,7 +31,28 @@ </div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/debugging.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/debugging.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/documenting.html.en b/docs/manual/developer/documenting.html.en index f0c06340..0d899b41 100644 --- a/docs/manual/developer/documenting.html.en +++ b/docs/manual/developer/documenting.html.en @@ -5,24 +5,27 @@ This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> -<title>Documenting Apache 2.0 - Apache HTTP Server</title> +<title>Documenting code in Apache 2.4 - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body id="manual-page" class="no-sidebar"><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="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> <p class="apache">Apache HTTP Server Version 2.4</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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Documenting Apache 2.0</h1> +<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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Documenting code in Apache 2.4</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="../en/developer/documenting.html" title="English"> en </a> | <a href="../zh-cn/developer/documenting.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> </div> - <p>Apache 2.0 uses <a href="http://www.doxygen.org/">Doxygen</a> to + <p>Apache 2.4 uses <a href="http://www.doxygen.org/">Doxygen</a> to document the APIs and global variables in the code. This will explain the basics of how to document using Doxygen.</p> </div> @@ -80,7 +83,28 @@ <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/documenting.html" title="English"> en </a> | <a href="../zh-cn/developer/documenting.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/documenting.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/documenting.html.zh-cn b/docs/manual/developer/documenting.html.zh-cn index d1a298c5..7f83e238 100644 --- a/docs/manual/developer/documenting.html.zh-cn +++ b/docs/manual/developer/documenting.html.zh-cn @@ -8,10 +8,13 @@ <title>Apache 2.0 文档 - Apache HTTP 服务器</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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body id="manual-page" class="no-sidebar"><div id="page-header"> -<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="../faq/">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p> +<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="http://wiki.apache.org/httpd/FAQ">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p> <p class="apache">Apache HTTP 服务器版本 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -77,7 +80,28 @@ <div class="bottomlang"> <p><span>可用语言: </span><a href="../en/developer/documenting.html" hreflang="en" rel="alternate" title="English"> en </a> | <a href="../zh-cn/developer/documenting.html" title="Simplified Chinese"> zh-cn </a></p> -</div><div id="footer"> +</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">评论</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/documenting.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <p class="apache">Copyright 2012 The Apache Software Foundation.<br />基于 <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a> 许可证.</p> -<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="../faq/">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p></div> +<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="http://wiki.apache.org/httpd/FAQ">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/filters.html.en b/docs/manual/developer/filters.html.en index d6e435c2..8ffe182b 100644 --- a/docs/manual/developer/filters.html.en +++ b/docs/manual/developer/filters.html.en @@ -8,10 +8,13 @@ <title>How filters work in 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -32,7 +35,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#howinserted">How are filters inserted?</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#asis">Asis</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#conclusion">Explanations</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="types" id="types">Filter Types</a></h2> @@ -204,7 +207,28 @@ Default_handler --> sub_request_core </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/filters.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/filters.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/hooks.html.en b/docs/manual/developer/hooks.html.en index f1abb041..a5539dd3 100644 --- a/docs/manual/developer/hooks.html.en +++ b/docs/manual/developer/hooks.html.en @@ -5,18 +5,21 @@ This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> -<title>Apache 2.0 Hook Functions - Apache HTTP Server</title> +<title>Hook Functions in the Apache HTTP Server 2.x - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Apache 2.0 Hook Functions</h1> +<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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Hook Functions in the Apache HTTP Server 2.x</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="../en/developer/hooks.html" title="English"> en </a></p> </div> @@ -26,14 +29,14 @@ date.</p> </div> - <p>In general, a hook function is one that Apache will call at - some point during the processing of a request. Modules can - provide functions that are called, and specify when they get - called in comparison to other modules.</p> + <p>In general, a hook function is one that the Apache HTTP Server + will call at some point during the processing of a request. + Modules can provide functions that are called, and specify when + they get called in comparison to other modules.</p> </div> <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#create">Creating a hook function</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#hooking">Hooking the hook</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="create" id="create">Creating a hook function</a></h2> @@ -46,9 +49,10 @@ arguments. For example, if the hook returns an <code>int</code> and takes a <code>request_rec *</code> and an <code>int</code> and is called <code>do_something</code>, then declare it like this:</p> - <div class="example"><p><code> + <pre class="prettyprint lang-c"> AP_DECLARE_HOOK(int, do_something, (request_rec *r, int n)) - </code></p></div> + </pre> + <p>This should go in a header which modules will include if they want to use the hook.</p> @@ -59,14 +63,13 @@ which is used to record the module functions that use the hook. This is declared as follows:</p> - <div class="example"><p><code> - APR_HOOK_STRUCT(<br /> - <span class="indent"> - APR_HOOK_LINK(do_something)<br /> - ...<br /> - </span> + <pre class="prettyprint lang-c"> + APR_HOOK_STRUCT( + APR_HOOK_LINK(do_something) + ... ) - </code></p></div> + </pre> + <h3><a name="create-implement" id="create-implement">Implement the hook caller</a></h3> @@ -79,38 +82,39 @@ <p>If the return value of a hook is <code>void</code>, then all the hooks are called, and the caller is implemented like this:</p> - <div class="example"><p><code> + <pre class="prettyprint lang-c"> AP_IMPLEMENT_HOOK_VOID(do_something, (request_rec *r, int n), (r, n)) - </code></p></div> + </pre> + <p>The second and third arguments are the dummy argument declaration and the dummy arguments as they will be used when calling the hook. In other words, this macro expands to something like this:</p> - <div class="example"><p><code> - void ap_run_do_something(request_rec *r, int n)<br /> - {<br /> - <span class="indent"> - ...<br /> - do_something(r, n);<br /> - </span> + <pre class="prettyprint lang-c"> + void ap_run_do_something(request_rec *r, int n) + { + ... + do_something(r, n); } - </code></p></div> + </pre> + <h4>Hooks that return a value</h4> <p>If the hook returns a value, then it can either be run until the first hook that does something interesting, like so:</p> - <div class="example"><p><code> + <pre class="prettyprint lang-c"> AP_IMPLEMENT_HOOK_RUN_FIRST(int, do_something, (request_rec *r, int n), (r, n), DECLINED) - </code></p></div> + </pre> + <p>The first hook that does <em>not</em> return <code>DECLINED</code> stops the loop and its return value is returned from the hook - caller. Note that <code>DECLINED</code> is the tradition Apache - hook return meaning "I didn't do anything", but it can be + caller. Note that <code>DECLINED</code> is the traditional + hook return value meaning "I didn't do anything", but it can be whatever suits you.</p> <p>Alternatively, all hooks can be run until an error occurs. @@ -120,9 +124,10 @@ value other than one of those two stops the loop, and its return is the return value. Declare these like so:</p> - <div class="example"><p><code> + <pre class="prettyprint lang-c"> AP_IMPLEMENT_HOOK_RUN_ALL(int, do_something, (request_rec *r, int n), (r, n), OK, DECLINED) - </code></p></div> + </pre> + <p>Again, <code>OK</code> and <code>DECLINED</code> are the traditional values. You can use what you want.</p> @@ -133,12 +138,13 @@ <p>At appropriate moments in the code, call the hook caller, like so:</p> - <div class="example"><p><code> - int n, ret;<br /> - request_rec *r;<br /> - <br /> + <pre class="prettyprint lang-c"> + int n, ret; + request_rec *r; + ret=ap_run_do_something(r, n); - </code></p></div> + </pre> + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -150,38 +156,34 @@ <p>Include the appropriate header, and define a static function of the correct type:</p> - <div class="example"><p><code> + <pre class="prettyprint lang-c"> static int my_something_doer(request_rec *r, int n)<br /> - {<br /> - <span class="indent"> - ...<br /> - return OK;<br /> - </span> + { + ... + return OK; } - </code></p></div> + </pre> + <h3><a name="hooking-add" id="hooking-add">Add a hook registering function</a></h3> - <p>During initialisation, Apache will call each modules hook + <p>During initialisation, the server will call each modules hook registering function, which is included in the module structure:</p> - <div class="example"><p><code> - static void my_register_hooks()<br /> - {<br /> - <span class="indent"> - ap_hook_do_something(my_something_doer, NULL, NULL, APR_HOOK_MIDDLE);<br /> - </span> - }<br /> - <br /> - mode MODULE_VAR_EXPORT my_module =<br /> - {<br /> - <span class="indent"> - ...<br /> - my_register_hooks /* register hooks */<br /> - </span> + <pre class="prettyprint lang-c"> + static void my_register_hooks() + { + ap_hook_do_something(my_something_doer, NULL, NULL, APR_HOOK_MIDDLE); + } + + mode MODULE_VAR_EXPORT my_module = + { + ... + my_register_hooks /* register hooks */ }; - </code></p></div> + </pre> + <h3><a name="hooking-order" id="hooking-order">Controlling hook calling order</a></h3> @@ -197,9 +199,9 @@ order relative to each other, but, of course, all modules using <code>APR_HOOK_FIRST</code> will be run before <code>APR_HOOK_MIDDLE</code> which are before <code>APR_HOOK_LAST</code>. Modules that don't care - when they are run should use <code>APR_HOOK_MIDDLE</code>. <em>(I spaced - these out so people could do stuff like <code>APR_HOOK_FIRST-2</code> - to get in slightly earlier, but is this wise? - Ben)</em></p> + when they are run should use <code>APR_HOOK_MIDDLE</code>. <em>These + values are spaced out, so that positions like <code>APR_HOOK_FIRST-2</code> + are possible to hook slightly earlier than other functions.</em></p> <p>Note that there are two more values, <code>APR_HOOK_REALLY_FIRST</code> and <code>APR_HOOK_REALLY_LAST</code>. These @@ -213,27 +215,46 @@ example, suppose we want "mod_xyz.c" and "mod_abc.c" to run before we do, then we'd hook as follows:</p> - <div class="example"><p><code> - static void register_hooks()<br /> - {<br /> - <span class="indent"> - static const char * const aszPre[] = { "mod_xyz.c", "mod_abc.c", NULL };<br /> - <br /> - ap_hook_do_something(my_something_doer, aszPre, NULL, APR_HOOK_MIDDLE);<br /> - </span> + <pre class="prettyprint lang-c"> + static void register_hooks() + { + static const char * const aszPre[] = { "mod_xyz.c", "mod_abc.c", NULL }; + + ap_hook_do_something(my_something_doer, aszPre, NULL, APR_HOOK_MIDDLE); } - </code></p></div> + </pre> + <p>Note that the sort used to achieve this is stable, so ordering set by <code>APR_HOOK_<var>ORDER</var></code> is preserved, as far as is possible.</p> - <p class="cite"><cite>Ben Laurie</cite>, 15th August 1999</p> </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/hooks.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/hooks.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/index.html.en b/docs/manual/developer/index.html.en index 30637196..50fba702 100644 --- a/docs/manual/developer/index.html.en +++ b/docs/manual/developer/index.html.en @@ -5,18 +5,21 @@ This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> -<title>Developer Documentation for Apache 2.x - Apache HTTP Server</title> +<title>Developer Documentation for the Apache HTTP Server 2.4 - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</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 2.4</a></div><div id="page-content"><div id="preamble"><h1>Developer Documentation for Apache 2.x</h1> +<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 2.4</a></div><div id="page-content"><div id="preamble"><h1>Developer Documentation for the Apache HTTP Server 2.4</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="../en/developer/" title="English"> en </a> | <a href="../zh-cn/developer/" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> @@ -30,21 +33,28 @@ <a href="http://httpd.apache.org/lists.html#http-dev">dev@httpd.apache.org</a> mailing list.</p> </div> </div> -<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#topics">Topics</a></li> +<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#developing">2.4 development documents</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#upgrading">Upgrading to 2.4</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#external">External Resources</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="topics" id="topics">Topics</a></h2> +<h2><a name="developing" id="developing">2.4 development documents</a></h2> + <ul> + <li><a href="modguide.html">Developing modules for the Apache HTTP Server 2.4</a></li> + <li><a href="hooks.html">Hook Functions in 2.4</a></li> + <li><a href="request.html">Request Processing in 2.4</a></li> + <li><a href="filters.html">How filters work in 2.4</a></li> + <li><a href="output-filters.html">Guidelines for output filters in 2.4</a></li> + <li><a href="documenting.html">Documenting code in 2.4</a></li> + <li><a href="thread_safety.html">Thread Safety Issues in 2.4</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="upgrading" id="upgrading">Upgrading to 2.4</a></h2> <ul> - <li><a href="new_api_2_4.html">API changes in Apache 2.3/2.4</a></li> - <li><a href="hooks.html">Apache 2.x Hook Functions</a></li> - <li><a href="request.html">Request Processing in Apache 2.x</a></li> - <li><a href="filters.html">How filters work in Apache 2.x</a></li> - <li><a href="output-filters.html">Guidelines for output filters in Apache 2.x</a></li> - <li><a href="modules.html">Converting Modules from Apache 1.3 to Apache 2.x</a></li> - <li><a href="documenting.html">Documenting Apache 2.x</a></li> - <li><a href="thread_safety.html">Apache 2.x Thread Safety Issues</a></li> + <li><a href="new_api_2_4.html">API changes in 2.3/2.4</a></li> + <li><a href="modules.html">Converting Modules from 1.3 to 2.x</a></li> </ul> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -54,10 +64,10 @@ <li>Developer articles at <a href="http://www.apachetutor.org/">apachetutor</a> include: <ul> - <li><a href="http://www.apachetutor.org/dev/request">Request Processing in Apache</a></li> + <li><a href="http://www.apachetutor.org/dev/request">Request Processing</a></li> <li><a href="http://www.apachetutor.org/dev/config">Configuration for Modules</a></li> - <li><a href="http://www.apachetutor.org/dev/pools">Resource Management in Apache</a></li> - <li><a href="http://www.apachetutor.org/dev/reslist">Connection Pooling in Apache</a></li> + <li><a href="http://www.apachetutor.org/dev/pools">Resource Management</a></li> + <li><a href="http://www.apachetutor.org/dev/reslist">Connection Pooling</a></li> <li><a href="http://www.apachetutor.org/dev/brigades">Introduction to Buckets and Brigades</a></li> </ul></li> </ul> @@ -67,5 +77,9 @@ <a href="../zh-cn/developer/" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> </div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/index.html.zh-cn b/docs/manual/developer/index.html.zh-cn index bd99eb8e..7994ad64 100644 --- a/docs/manual/developer/index.html.zh-cn +++ b/docs/manual/developer/index.html.zh-cn @@ -8,10 +8,13 @@ <title>Apache 2.0 开发者文档 - Apache HTTP 服务器</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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body id="manual-page"><div id="page-header"> -<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="../faq/">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p> +<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="http://wiki.apache.org/httpd/FAQ">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p> <p class="apache">Apache HTTP 服务器版本 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="../"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -75,5 +78,9 @@ <a href="../zh-cn/developer/" title="Simplified Chinese"> zh-cn </a></p> </div><div id="footer"> <p class="apache">Copyright 2012 The Apache Software Foundation.<br />基于 <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a> 许可证.</p> -<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="../faq/">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p></div> +<p class="menu"><a href="../mod/">模块</a> | <a href="../mod/directives.html">指令</a> | <a href="http://wiki.apache.org/httpd/FAQ">常见问题</a> | <a href="../glossary.html">术语</a> | <a href="../sitemap.html">网站导航</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/modguide.html b/docs/manual/developer/modguide.html new file mode 100644 index 00000000..7671aa95 --- /dev/null +++ b/docs/manual/developer/modguide.html @@ -0,0 +1,5 @@ +# GENERATED FROM XML -- DO NOT EDIT + +URI: modguide.html.en +Content-Language: en +Content-type: text/html; charset=ISO-8859-1 diff --git a/docs/manual/developer/modguide.html.en b/docs/manual/developer/modguide.html.en new file mode 100644 index 00000000..58383274 --- /dev/null +++ b/docs/manual/developer/modguide.html.en @@ -0,0 +1,1791 @@ +<?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>Developing modules for the Apache HTTP Server 2.4 - 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 rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + +<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="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</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 2.4</a> > <a href="./">Developer</a></div><div id="page-content"><div id="preamble"><h1>Developing modules for the Apache HTTP Server 2.4</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/developer/modguide.html" title="English"> en </a></p> +</div> + +<p>This document explains how you can develop modules for the Apache HTTP +Server 2.4</p> +</div> +<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#introduction">Introduction</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#basics">Defining a module</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#hooking">Getting started: Hooking into the server</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#handling">Building a handler</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#configuration">Adding configuration options</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#context">Context aware configurations</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#summary">Summing up</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#snippets">Some useful snippets of code</a></li> +</ul><h3>See also</h3><ul class="seealso"><li><a href="request.html">Request Processing in Apache 2.4</a></li><li><a href="hooks.html">Apache 2.x Hook Functions</a></li></ul><ul class="seealso"><li><a href="#comments_section">Comments</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="introduction" id="introduction">Introduction</a></h2> +<h3><a name="what" id="what">What we will be discussing in this document</a></h3> +<p> +This document will discuss how you can create modules for the Apache +HTTP Server 2.4, by exploring an example module called +<code>mod_example</code>. In the first part of this document, the purpose +of this module will be to calculate and print out various digest values for +existing files on your web server, whenever we access the URL <code> +http://hostname/filename.sum</code>. For instance, if we want to know the +MD5 digest value of the file located at <code> +http://www.example.com/index.html</code>, we would visit <code> +http://www.example.com/index.html.sum</code>. +</p> + +<p> +In the second part of this document, which deals with configuration +directive and context awareness, we will be looking at a module that simply +write out its own configuration to the client. +</p> + + +<h3><a name="prerequisites" id="prerequisites">Prerequisites</a></h3> +<p> +First and foremost, you are expected to have a basic knowledge of how the C +programming language works. In most cases, we will try to be as pedagogical +as possible and link to documents describing the functions used in the +examples, but there are also many cases where it is necessary to either +just assume that "it works" or do some digging yourself into what the hows +and whys of various function calls. +</p> +<p> +Lastly, you will need to have a basic understanding of how modules are +loaded and configured in the Apache HTTP Server, as well as how to get the headers for +Apache if you do not have them already, as these are needed for compiling +new modules. +</p> + +<h3><a name="compiling" id="compiling">Compiling your module</a></h3> +<p> +To compile the source code we are building in this document, we will be +using <a href="../programs/apxs.html">APXS</a>. Assuming your source file +is called mod_example.c, compiling, installing and activating the module is +as simple as: +</p> +<div class="example"><pre> +apxs -i -a -c mod_example.c +</pre></div> + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="basics" id="basics">Defining a module</a></h2> +<p> +<img src="../images/build_a_mod_3.png" alt="Module name tags" /><br /> +Every module starts with the same declaration, or name tag if you will, +that defines a module as <em>a separate entity within Apache</em>:</p> + + + +<pre class="prettyprint lang-c"> +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + create_dir_conf, /* Per-directory configuration handler */ + merge_dir_conf, /* Merge handler for per-directory configurations */ + create_svr_conf, /* Per-server configuration handler */ + merge_svr_conf, /* Merge handler for per-server configurations */ + directives, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; +</pre> + + + +<p> +This bit of code lets the server know that we have now registered a new module +in the system, and that its name is <code>example_module</code>. The name +of the module is used primarily for two things:<br /> +</p> +<ul> +<li>Letting the server know how to load the module using the LoadModule</li> +<li>Setting up a namespace for the module to use in configurations</li> +</ul> +<p> +For now, we're only concerned with the first purpose of the module name, +which comes into play when we need to load the module: +</p> +<pre class="prettyprint lang-config"> +LoadModule example_module modules/mod_example.so +</pre> + +<p> +In essence, this tells the server to open up <code>mod_example.so</code> and look for a module +called <code>example_module</code>. +</p> +<p> +Within this name tag of ours is also a bunch of references to how we would +like to handle things: Which directives do we respond to in a configuration +file or .htaccess, how do we operate within specific contexts, and what +handlers are we interested in registering with the Apache HTTP service. We'll +return to all these elements later in this document. +</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="hooking" id="hooking">Getting started: Hooking into the server</a></h2> +<h3><a name="hook_intro" id="hook_intro">An introduction to hooks</a></h3> +<p> +When handling requests in Apache HTTP Server 2.4, the first thing you will need to do is +create a hook into the request handling process. A hook is essentially a +message telling the server that you are willing to either serve or at least +take a glance at certain requests given by clients. All handlers, whether +it's mod_rewrite, mod_authn_*, mod_proxy and so on, are hooked into +specific parts of the request process. As you are probably aware, modules +serve different purposes; Some are authentication/authorization handlers, +others are file or script handlers while some third modules rewrite URIs or +proxies content. Furthermore, in the end, it is up to the user of the server +how and when each module will come into place. Thus, the server itself does not +presume to know which module is responsible for handling a specific +request, and will ask each module whether they have an interest in a given +request or not. It is then up to each module to either gently decline +serving a request, accept serving it or flat out deny the request from +being served, as authentication/authorization modules do: <br /> +<img src="../images/build_a_mod_2.png" alt="Hook handling in httpd" /><br /> +To make it a bit easier for handlers such as our mod_example to know +whether the client is requesting content we should handle or not, the server +has directives for hinting to modules whether their assistance is needed or +not. Two of these are <code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code> +and <code class="directive"><a href="../mod/core.html#sethandler">SetHandler</a></code>. Let's take a look at +an example using <code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code>. In +our example case, we want every request ending with .sum to be served by +<code>mod_example</code>, so we'll add a configuration directive that tells +the server to do just that: +</p> +<pre class="prettyprint lang-config"> +AddHandler example-handler .sum +</pre> + +<p> +What this tells the server is the following: <em>Whenever we receive a request +for a URI ending in .sum, we are to let all modules know that we are +looking for whoever goes by the name of "example-handler" </em>. +Thus, when a request is being served that ends in .sum, the server will let all +modules know, that this request should be served by "example-handler +". As you will see later, when we start building mod_example, we will +check for this handler tag relayed by <code>AddHandler</code> and reply to +the server based on the value of this tag. +</p> + +<h3><a name="hook_declaration" id="hook_declaration">Hooking into httpd</a></h3> +<p> +To begin with, we only want to create a simple handler, that replies to the +client browser when a specific URL is requested, so we won't bother setting +up configuration handlers and directives just yet. Our initial module +definition will look like this:</p> + + + +<pre class="prettyprint lang-c"> +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + NULL, + NULL, + NULL, + NULL, + NULL, + register_hooks /* Our hook registering function */ +}; +</pre> + + + + +<p>This lets the server know that we are not interesting in anything fancy, we +just want to hook onto the requests and possibly handle some of them. </p> + +<p> The reference in our example declaration, <code>register_hooks</code> +is the name of a function we will create to manage how we hook onto the +request process. In this example module, the function has just one purpose; +To create a simple hook that gets called after all the rewrites, access +control etc has been handled. Thus, we will let the server know, that we want +to hook into its process as one of the last modules: +</p> + + +<pre class="prettyprint lang-c"> +static void register_hooks(apr_pool_t *pool) +{ + /* Create a hook in the request handler, so we get called when a request arrives */ + ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST); +} +</pre> + + + +<p> +The <code>example_handler</code> reference is the function that will handle +the request. We will discuss how to create a handler in the next chapter. +</p> + +<h3><a name="hook_others" id="hook_others">Other useful hooks</a></h3> +<p> +Hooking into the request handling phase is but one of many hooks that you +can create. Some other ways of hooking are: +</p> +<ul> +<li><code>ap_hook_child_init</code>: Place a hook that executes when a child process is spawned (commonly used for initializing modules after the server has forked)</li> +<li><code>ap_hook_pre_config</code>: Place a hook that executes before any configuration data has been read (very early hook)</li> +<li><code>ap_hook_post_config</code>: Place a hook that executes after configuration has been parsed, but before the server has forked</li> +<li><code>ap_hook_translate_name</code>: Place a hook that executes when a URI needs to be translated into a filename on the server (think <code>mod_rewrite</code>)</li> +<li><code>ap_hook_quick_handler</code>: Similar to <code>ap_hook_handler</code>, except it is run before any other request hooks (translation, auth, fixups etc)</li> +<li><code>ap_hook_log_transaction</code>: Place a hook that executes when the server is about to add a log entry of the current request</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="handling" id="handling">Building a handler</a></h2> +<p> +A handler is essentially a function that receives a callback when a request +to the server is made. It is passed a record of the current request (how it was +made, which headers and requests were passed along, who's giving the +request and so on), and is put in charge of either telling the server that it's +not interested in the request or handle the request with the tools provided. +</p> +<h3><a name="simple_handler" id="simple_handler">A simple "Hello, world!" +handler</a></h3> +<p>Let's start off by making a very simple request handler +that does the following: +</p> +<ol> +<li>Check that this is a request that should be served by "example-handler"</li> +<li>Set the content type of our output to <code>text/html</code></li> +<li>Write "Hello, world!" back to the client browser</li> +<li>Let the server know that we took care of this request and everything went fine</li> +</ol> +<p> +In C code, our example handler will now look like this: +</p> + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + /* First off, we need to check if this is a call for the "example-handler" handler. + * If it is, we accept it and do our things, if not, we simply return DECLINED, + * and the server will try somewhere else. + */ + if (!r->handler || strcmp(r->handler, "example-handler")) return (DECLINED); + + /* Now that we are handling this request, we'll write out "Hello, world!" to the client. + * To do so, we must first set the appropriate content type, followed by our output. + */ + ap_set_content_type(r, "text/html"); + ap_rprintf(r, "Hello, world!"); + + /* Lastly, we must tell the server that we took care of this request and everything went fine. + * We do so by simply returning the value OK to the server. + */ + return OK; +} +</pre> + + + +<p> +Now, we put all we have learned together and end up with a program that +looks like +<a href="http://people.apache.org/~humbedooh/mods/examples/mod_example_1.c">mod_example_1.c</a> +. The functions used in this example will be explained later in the section +<a href="#functions">"Some useful functions you should know"</a>. +</p> + +<h3><a name="request_rec" id="request_rec">The request_rec structure</a></h3> +<p>The most essential part of any request is the <em>request record +</em>. In a call to a handler function, this is represented by the <code> +request_req* </code> structure passed along with every call that is made. +This struct, typically just refered to as <code>r</code> in modules, +contains all the information you need for your module to fully process any +HTTP request and respond accordingly.</p> <p>Some key elements of the <code> +request_req </code> structure are: +</p> +<ul> +<li><code>r->handler (char*):</code> Contains the name of the handler the server is currently asking to do the handling of this request</li> +<li><code>r->method (char*):</code> Contains the HTTP method being used, f.x. GET or POST</li> +<li><code>r->filename (char*):</code> Contains the translated filename the client is requesting</li> +<li><code>r->args (char*):</code> Contains the query string of the request, if any</li> +<li><code>r->headers_in (apr_table_t*):</code> Contains all the headers sent by the client</li> +<li><code>r->connection (conn_rec*):</code> A record containing information about the current connection</li> +<li><code>r->user (char*):</code> If the URI requires authentication, this is set to the username provided</li> +<li><code>r->useragent_ip (char*):</code> The IP address of the client connecting to us</li> +<li><code>r->pool (apr_pool_t*)</code>: The memory pool of this request. We'll discuss this in the +"<a href="#memory">Memory management</a>" chapter.</li> +</ul> +<p> +A complete list of all the values contained with in the <code>request_req</code> structure can be found in +the <a href="http://svn.apache.org/repos/asf/httpd/httpd/trunk/include/httpd.h"><code>httpd.h</code></a> header +file or at <a href="http://ci.apache.org/projects/httpd/trunk/doxygen/structrequest__rec.html">http://ci.apache.org/projects/httpd/trunk/doxygen/structrequest__rec.html</a>. +</p> + + +<p> +Let's try out some of these variables in another example handler:<br /> +</p> + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + /* Set the appropriate content type */ + ap_set_content_type(r, "text/html"); + + /* Print out the IP address of the client connecting to us: */ + ap_rprintf(r, "<h2>Hello, %s!</h2>", r->useragent_ip); + + /* If we were reached through a GET or a POST request, be happy, else sad. */ + if ( !strcmp(r->method, "POST") || !strcmp(r->method, "GET") ) { + ap_rputs("You used a GET or a POST method, that makes us happy!<br/>", r); + } + else { + ap_rputs("You did not use POST or GET, that makes us sad :(<br/>", r); + } + + /* Lastly, if there was a query string, let's print that too! */ + if (r->args) { + ap_rprintf(r, "Your query string was: %s", r->args); + } + return OK; +} +</pre> + + + + + +<h3><a name="return_value" id="return_value">Return values</a></h3> +<p> +Apache relies on return values from handlers to signify whether a request +was handled or not, and if so, whether the request went well or not. If a +module is not interested in handling a specific request, it should always +return the value <code>DECLINED</code>. If it is handling a request, it +should either return the generic value <code>OK</code>, or a specific HTTP +status code, for example: +</p> + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + /* Return 404: Not found */ + return HTTP_NOT_FOUND; +} +</pre> + + + +<p> +Returning <code>OK</code> or a HTTP status code does not necessarily mean +that the request will end. The server may still have other handlers that are +interested in this request, for instance the logging modules which, upon a +successful request, will write down a summary of what was requested and how +it went. To do a full stop and prevent any further processing after your +module is done, you can return the value <code>DONE</code> to let the server +know that it should cease all activity on this request and carry on with +the next, without informing other handlers. +<br /> +<strong>General response codes:</strong> +</p> +<ul> +<li><code>DECLINED</code>: We are not handling this request</li> +<li><code>OK</code>: We handled this request and it went well</li> +<li><code>DONE</code>: We handled this request and the server should just close this thread without further processing</li> +</ul> +<p> +<strong>HTTP specific return codes (excerpt):</strong> +</p> +<ul> +<li><code>HTTP_OK (200)</code>: Request was okay</li> +<li><code>HTTP_MOVED_PERMANENTLY (301)</code>: The resource has moved to a new URL</li> +<li><code>HTTP_UNAUTHORIZED (401)</code>: Client is not authorized to visit this page</li> +<li><code>HTTP_FORBIDDEN (403)</code>: Permission denied</li> +<li><code>HTTP_NOT_FOUND (404)</code>: File not found</li> +<li><code>HTTP_INTERNAL_SERVER_ERROR (500)</code>: Internal server error (self explanatory)</li> +</ul> + + +<h3><a name="functions" id="functions">Some useful functions you should know</a></h3> + +<ul> +<li> + <code>ap_rputs(const char *string, request_req *r)</code>: <br /> + Sends a string of text to the client. This is a shorthand version of <a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__PROTO.html#gac827cd0537d2b6213a7c06d7c26cc36e"> + ap_rwrite</a>. + + + +<pre class="prettyprint lang-c">ap_rputs("Hello, world!", r);</pre> + + + + +</li> +<li> + <code> + <a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__PROTO.html#ga5e91eb6ca777c9a427b2e82bf1eeb81d">ap_rprintf</a></code>: <br /> + This function works just like <code>printf</code>, except it sends the result to the client. + + + +<pre class="prettyprint lang-c">ap_rprintf(r, "Hello, %s!", r->useragent_ip);</pre> + + + +</li> +<li> + <code> + <a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__PROTO.html#gaa2f8412c400197338ec509f4a45e4579">ap_set_content_type</a>(request_req *r, const char *type)</code>: <br /> + Sets the content type of the output you are sending. + + + +<pre class="prettyprint lang-c">ap_set_content_type(r, "text/plain"); /* force a raw text output */</pre> + + + +</li> + + +</ul> + + +<h3><a name="memory" id="memory">Memory management</a></h3> +<p> +Managing your resources in Apache HTTP Server 2.4 is quite easy, thanks to the memory pool +system. In essence, each server, connection and request have their own +memory pool that gets cleaned up when its scope ends, e.g. when a request +is done or when a server process shuts down. All your module needs to do is +latch onto this memory pool, and you won't have to worry about having to +clean up after yourself - pretty neat, huh? +</p> + +<p> +In our module, we will primarily be allocating memory for each request, so +it's appropriate to use the <code>r->pool</code> +reference when creating new objects. A few of the functions for allocating +memory within a pool are: +</p> +<ul> +<li><code>void* <a href="http://apr.apache.org/docs/apr/1.4/group__apr__pools.html#ga85f1e193c31d109affda72f9a92c6915">apr_palloc</a>( +apr_pool_t *p, apr_size_t size)</code>: Allocates <code>size</code> number of bytes in the pool for you</li> +<li><code>void* <a href="http://apr.apache.org/docs/apr/1.4/group__apr__pools.html#gaf61c098ad258069d64cdf8c0a9369f9e">apr_pcalloc</a>( +apr_pool_t *p, apr_size_t size)</code>: Allocates <code>size</code> number of bytes in the pool for you and sets all bytes to 0</li> +<li><code>char* <a href="http://apr.apache.org/docs/apr/1.4/group__apr__strings.html#gabc79e99ff19abbd7cfd18308c5f85d47">apr_pstrdup</a>( +apr_pool_t *p, const char *s)</code>: Creates a duplicate of the string <code>s</code>. This is useful for copying constant values so you can edit them</li> +<li><code>char* <a href="http://apr.apache.org/docs/apr/1.4/group__apr__strings.html#ga3eca76b8d293c5c3f8021e45eda813d8">apr_psprintf</a>( +apr_pool_t *p, const char *fmt, ...)</code>: Similar to <code>sprintf</code>, except the server supplies you with an appropriately allocated target variable</li> +</ul> + +<p>Let's put these functions into an example handler:</p> + + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + const char* original = "You can't edit this!"; + char* copy; + int* integers; + + /* Allocate space for 10 integer values and set them all to zero. */ + integers = apr_pcalloc(r->pool, sizeof(int)*10); + + /* Create a copy of the 'original' variable that we can edit. */ + copy = apr_pstrdup(r->pool, original); + return OK; +} +</pre> + + + +<p> +This is all well and good for our module, which won't need any +pre-initialized variables or structures. However, if we wanted to +initialize something early on, before the requests come rolling in, we +could simply add a call to a function in our <code>register_hooks</code> +function to sort it out: +</p> + + +<pre class="prettyprint lang-c"> +static void register_hooks(apr_pool_t *pool) +{ + /* Call a function that initializes some stuff */ + example_init_function(pool); + /* Create a hook in the request handler, so we get called when a request arrives */ + ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST); +} +</pre> + + + +<p> +In this pre-request initialization function we would not be using the +same pool as we did when allocating resources for request-based functions. +Instead, we would use the pool given to us by the server for allocating memory +on a per-process based level. +</p> + + +<h3><a name="parsing" id="parsing">Parsing request data</a></h3> +<p> +In our example module, we would like to add a feature, that checks which +type of digest, MD5 or SHA1 the client would like to see. This could be +solved by adding a query string to the request. A query string is typically +comprised of several keys and values put together in a string, for instance +<code>valueA=yes&valueB=no&valueC=maybe</code>. It is up to the +module itself to parse these and get the data it requires. In our example, +we'll be looking for a key called <code>digest</code>, and if set to <code> +md5</code>, we'll produce an MD5 digest, otherwise we'll produce a SHA1 +digest. +</p> +<p> +Since the introduction of Apache HTTP Server 2.4, parsing request data from GET and +POST requests have never been easier. All we require to parse both GET and +POST data is four simple lines: +</p> + + + +<pre class="prettyprint lang-c"> +<a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__apr__tables.html#gad7ea82d6608a4a633fc3775694ab71e4">apr_table_t</a> *GET; <em> +</em><a href="http://ci.apache.org/projects/httpd/trunk/doxygen/structapr__array__header__t.html">apr_array_header_t</a>*POST; +<em> +</em> +<a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__SCRIPT.html#gaed25877b529623a4d8f99f819ba1b7bd"> +ap_args_to_table</a>(r, &GET); <em> +</em><a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__DAEMON.html#ga9d426b6382b49754d4f87c55f65af202"> +ap_parse_form_data</a>(r, NULL, &POST, -1, 8192); +</pre> + + + +<p> +In our specific example module, we're looking for the <code>digest</code> +value from the query string, which now resides inside a table called <code> +GET</code>. To extract this value, we need only perform a simple operation: +</p> + + + +<pre class="prettyprint lang-c"> +/* Get the "digest" key from the query string, if any. */ +const char *digestType = apr_table_get(GET, "digest"); + +/* If no key was returned, we will set a default value instead. */ +if (!digestType) digestType = "sha1"; +</pre> + + + +<p> +The structures used for the POST and GET data are not exactly the same, so +if we were to fetch a value from POST data instead of the query string, we +would have to resort to a few more lines, as outlined in <a href="#get_post">this example</a> in the last chapter of this document. +</p> + + +<h3><a name="advanced_handler" id="advanced_handler">Making an advanced handler</a></h3> +<p> +Now that we have learned how to parse form data and manage our resources, +we can move on to creating an advanced version of our module, that spits +out the MD5 or SHA1 digest of files: +</p> + + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + int rc, exists; + apr_finfo_t finfo; + apr_file_t *file; + char *filename; + char buffer[256]; + apr_size_t readBytes; + int n; + apr_table_t *GET; + apr_array_header_t *POST; + const char *digestType; + + + /* Check that the "example-handler" handler is being called. */ + if (!r->handler || strcmp(r->handler, "example-handler")) return (DECLINED); + + /* Figure out which file is being requested by removing the .sum from it */ + filename = apr_pstrdup(r->pool, r->filename); + filename[strlen(filename)-4] = 0; /* Cut off the last 4 characters. */ + + /* Figure out if the file we request a sum on exists and isn't a directory */ + rc = apr_stat(&finfo, filename, APR_FINFO_MIN, r->pool); + if (rc == APR_SUCCESS) { + exists = + ( + (finfo.filetype != APR_NOFILE) + && !(finfo.filetype & APR_DIR) + ); + if (!exists) return HTTP_NOT_FOUND; /* Return a 404 if not found. */ + } + /* If apr_stat failed, we're probably not allowed to check this file. */ + else return HTTP_FORBIDDEN; + + /* Parse the GET and, optionally, the POST data sent to us */ + + ap_args_to_table(r, &GET); + ap_parse_form_data(r, NULL, &POST, -1, 8192); + + /* Set the appropriate content type */ + ap_set_content_type(r, "text/html"); + + /* Print a title and some general information */ + ap_rprintf(r, "<h2>Information on %s:</h2>", filename); + ap_rprintf(r, "<b>Size:</b> %u bytes<br/>", finfo.size); + + /* Get the digest type the client wants to see */ + digestType = apr_table_get(GET, "digest"); + if (!digestType) digestType = "MD5"; + + + rc = apr_file_open(&file, filename, APR_READ, APR_OS_DEFAULT, r->pool); + if (rc == APR_SUCCESS) { + + /* Are we trying to calculate the MD5 or the SHA1 digest? */ + if (!strcasecmp(digestType, "md5")) { + /* Calculate the MD5 sum of the file */ + union { + char chr[16]; + uint32_t num[4]; + } digest; + apr_md5_ctx_t md5; + apr_md5_init(&md5); + readBytes = 256; + while ( apr_file_read(file, buffer, &readBytes) == APR_SUCCESS ) { + apr_md5_update(&md5, buffer, readBytes); + } + apr_md5_final(digest.chr, &md5); + + /* Print out the MD5 digest */ + ap_rputs("<b>MD5: </b><code>", r); + for (n = 0; n < APR_MD5_DIGESTSIZE/4; n++) { + ap_rprintf(r, "%08x", digest.num[n]); + } + ap_rputs("</code>", r); + /* Print a link to the SHA1 version */ + ap_rputs("<br/><a href='?digest=sha1'>View the SHA1 hash instead</a>", r); + } + else { + /* Calculate the SHA1 sum of the file */ + union { + char chr[20]; + uint32_t num[5]; + } digest; + apr_sha1_ctx_t sha1; + apr_sha1_init(&sha1); + readBytes = 256; + while ( apr_file_read(file, buffer, &readBytes) == APR_SUCCESS ) { + apr_sha1_update(&sha1, buffer, readBytes); + } + apr_sha1_final(digest.chr, &sha1); + + /* Print out the SHA1 digest */ + ap_rputs("<b>SHA1: </b><code>", r); + for (n = 0; n < APR_SHA1_DIGESTSIZE/4; n++) { + ap_rprintf(r, "%08x", digest.num[n]); + } + ap_rputs("</code>", r); + + /* Print a link to the MD5 version */ + ap_rputs("<br/><a href='?digest=md5'>View the MD5 hash instead</a>", r); + } + apr_file_close(file); + + } + /* Let the server know that we responded to this request. */ + return OK; +} +</pre> + + + +<p> +This version in its entirity can be found here: +<a href="http://people.apache.org/~humbedooh/mods/examples/mod_example_2.c">mod_example_2.c</a>. +</p> + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="configuration" id="configuration">Adding configuration options</a></h2> +<p> +In this next segment of this document, we will turn our eyes away from the +digest module and create a new example module, whose only function is to +write out its own configuration. The purpose of this is to examine how +the server works with configuration, and what happens when you start writing +advanced configurations +for your modules. +</p> +<h3><a name="config_intro" id="config_intro">An introduction to configuration +directives</a></h3> +<p> +If you are reading this, then you probably already know +what a configuration directive is. Simply put, a directive is a way of +telling an individual module (or a set of modules) how to behave, such as +these directives control how <code>mod_rewrite</code> works: +</p> +<pre class="prettyprint lang-config"> +RewriteEngine On +RewriteCond %{REQUEST_URI} ^/foo/bar +RewriteRule ^/foo/bar/(.*)$ /foobar?page=$1 +</pre> + +<p> +Each of these configuration directives are handled by a separate function, +that parses the parameters given and sets up a configuration accordingly. +</p> + +<h3><a name="config_simple" id="config_simple">Making an example configuration</a></h3> +<p>To begin with, we'll create a basic configuration in C-space:</p> + + + +<pre class="prettyprint lang-c"> +typedef struct { + int enabled; /* Enable or disable our module */ + const char *path; /* Some path to...something */ + int typeOfAction; /* 1 means action A, 2 means action B and so on */ +} example_config; +</pre> + + + +<p> +Now, let's put this into perspective by creating a very small module that +just prints out a hard-coded configuration. You'll notice that we use the +<code>register_hooks</code> function for initializing the configuration +values to their defaults: +</p> + + +<pre class="prettyprint lang-c"> +typedef struct { + int enabled; /* Enable or disable our module */ + const char *path; /* Some path to...something */ + int typeOfAction; /* 1 means action A, 2 means action B and so on */ +} example_config; + +static example_config config; + +static int example_handler(request_rec *r) +{ + if (!r->handler || strcmp(r->handler, "example-handler")) return(DECLINED); + ap_set_content_type(r, "text/plain"); + ap_rprintf(r, "Enabled: %u\n", config.enabled); + ap_rprintf(r, "Path: %s\n", config.path); + ap_rprintf(r, "TypeOfAction: %x\n", config.typeOfAction); + return OK; +} + +static void register_hooks(apr_pool_t *pool) +{ + config.enabled = 1; + config.path = "/foo/bar"; + config.typeOfAction = 0x00; + ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST); +} + +/* Define our module as an entity and assign a function for registering hooks */ + +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + NULL, /* Per-directory configuration handler */ + NULL, /* Merge handler for per-directory configurations */ + NULL, /* Per-server configuration handler */ + NULL, /* Merge handler for per-server configurations */ + NULL, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; +</pre> + + + +<p> +So far so good. To access our new handler, we could add the following to +our configuration: +</p> +<pre class="prettyprint lang-config"> +<Location /example> + SetHandler example-handler +</Location> +</pre> + +<p> +When we visit, we'll see our current configuration being spit out by our +module. +</p> + + +<h3><a name="register_directive" id="register_directive">Registering directives with the server</a></h3> +<p> +What if we want to change our configuration, not by hard-coding new values +into the module, but by using either the httpd.conf file or possibly a +.htaccess file? It's time to let the server know that we want this to be +possible. To do so, we must first change our <em>name tag</em> to include a +reference to the configuration directives we want to register with the server: +</p> + + +<pre class="prettyprint lang-c"> +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + NULL, /* Per-directory configuration handler */ + NULL, /* Merge handler for per-directory configurations */ + NULL, /* Per-server configuration handler */ + NULL, /* Merge handler for per-server configurations */ + example_directives, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; +</pre> + + + +<p> +This will tell the server that we are now accepting directives from the +configuration files, and that the structure called <code>example_directives +</code> holds information on what our directives are and how they work. +Since we have three different variables in our module configuration, we +will add a structure with three directives and a NULL at the end: +</p> + + +<pre class="prettyprint lang-c"> +static const command_rec example_directives[] = +{ + AP_INIT_TAKE1("exampleEnabled", example_set_enabled, NULL, RSRC_CONF, "Enable or disable mod_example"), + AP_INIT_TAKE1("examplePath", example_set_path, NULL, RSRC_CONF, "The path to whatever"), + AP_INIT_TAKE2("exampleAction", example_set_action, NULL, RSRC_CONF, "Special action value!"), + { NULL } +}; +</pre> + + + +<p> +<img src="../images/build_a_mod_4.png" alt="Directives structure" /><br /> +As you can see, each directive needs at least 5 parameters set: +</p> +<ol> +<li><code><a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__CONFIG.html#ga07c7d22ae17805e61204463326cf9c34">AP_INIT_TAKE1</a></code>: This is a macro that tells the server that this directive takes one and only one argument. +If we required two arguments, we could use the macro <code><a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__CONFIG.html#gafaec43534fcf200f37d9fecbf9247c21">AP_INIT_TAKE2</a></code> and so on (refer to httpd_conf.h +for more macros).</li> +<li><code>exampleEnabled</code>: This is the name of our directive. More precisely, it is what the user must put in his/her +configuration in order to invoke a configuration change in our module.</li> +<li><code>example_set_enabled</code>: This is a reference to a C function that parses the directive and sets the configuration +accordingly. We will discuss how to make this in the following paragraph.</li> +<li><code>RSRC_CONF</code>: This tells the server where the directive is permitted. We'll go into details on this value in the +later chapters, but for now, <code>RSRC_CONF</code> means that the server will only accept these directives in a server context.</li> +<li><code>"Enable or disable...."</code>: This is simply a brief description of what the directive does.</li> +</ol> +<p> +(<em>The "missing" parameter in our definition, which is usually set to +<code>NULL</code>, is an optional function that can be run after the +initial function to parse the arguments have been run. This is usually +omitted, as the function for verifying arguments might as well be used to +set them.</em>) +</p> + +<h3><a name="directive_handler" id="directive_handler">The directive handler function</a></h3> +<p> +Now that we've told the server to expect some directives for our module, it's +time to make a few functions for handling these. What the server reads in the +configuration file(s) is text, and so naturally, what it passes along to +our directive handler is one or more strings, that we ourselves need to +recognize and act upon. You'll notice, that since we set our <code> +exampleAction</code> directive to accept two arguments, its C function also +has an additional parameter defined:</p> + + +<pre class="prettyprint lang-c"> +/* Handler for the "exambleEnabled" directive */ +const char *example_set_enabled(cmd_parms *cmd, void *cfg, const char *arg) +{ + if(!strcasecmp(arg, "on")) config.enabled = 1; + else config.enabled = 0; + return NULL; +} + +/* Handler for the "examplePath" directive */ +const char *example_set_path(cmd_parms *cmd, void *cfg, const char *arg) +{ + config.path = arg; + return NULL; +} + +/* Handler for the "exampleAction" directive */ +/* Let's pretend this one takes one argument (file or db), and a second (deny or allow), */ +/* and we store it in a bit-wise manner. */ +const char *example_set_action(cmd_parms *cmd, void *cfg, const char *arg1, const char* arg2) +{ + if(!strcasecmp(arg1, "file")) config.typeOfAction = 0x01; + else config.typeOfAction = 0x02; + + if(!strcasecmp(arg2, "deny")) config.typeOfAction += 0x10; + else config.typeOfAction += 0x20; + return NULL; +} +</pre> + + + + + +<h3><a name="directive_complete" id="directive_complete">Putting it all together</a></h3> +<p> +Now that we have our directives set up, and handlers configured for them, +we can assemble our module into one big file: +</p> + + +<pre class="prettyprint lang-c"> +/* mod_example_config_simple.c: */ +#include <stdio.h> +#include "apr_hash.h" +#include "ap_config.h" +#include "ap_provider.h" +#include "httpd.h" +#include "http_core.h" +#include "http_config.h" +#include "http_log.h" +#include "http_protocol.h" +#include "http_request.h" + +/* + ============================================================================== + Our configuration prototype and declaration: + ============================================================================== + */ +typedef struct { + int enabled; /* Enable or disable our module */ + const char *path; /* Some path to...something */ + int typeOfAction; /* 1 means action A, 2 means action B and so on */ +} example_config; + +static example_config config; + +/* + ============================================================================== + Our directive handlers: + ============================================================================== + */ +/* Handler for the "exambleEnabled" directive */ +const char *example_set_enabled(cmd_parms *cmd, void *cfg, const char *arg) +{ + if(!strcasecmp(arg, "on")) config.enabled = 1; + else config.enabled = 0; + return NULL; +} + +/* Handler for the "examplePath" directive */ +const char *example_set_path(cmd_parms *cmd, void *cfg, const char *arg) +{ + config.path = arg; + return NULL; +} + +/* Handler for the "exampleAction" directive */ +/* Let's pretend this one takes one argument (file or db), and a second (deny or allow), */ +/* and we store it in a bit-wise manner. */ +const char *example_set_action(cmd_parms *cmd, void *cfg, const char *arg1, const char* arg2) +{ + if(!strcasecmp(arg1, "file")) config.typeOfAction = 0x01; + else config.typeOfAction = 0x02; + + if(!strcasecmp(arg2, "deny")) config.typeOfAction += 0x10; + else config.typeOfAction += 0x20; + return NULL; +} + +/* + ============================================================================== + The directive structure for our name tag: + ============================================================================== + */ +static const command_rec example_directives[] = +{ + AP_INIT_TAKE1("exampleEnabled", example_set_enabled, NULL, RSRC_CONF, "Enable or disable mod_example"), + AP_INIT_TAKE1("examplePath", example_set_path, NULL, RSRC_CONF, "The path to whatever"), + AP_INIT_TAKE2("exampleAction", example_set_action, NULL, RSRC_CONF, "Special action value!"), + { NULL } +}; +/* + ============================================================================== + Our module handler: + ============================================================================== + */ +static int example_handler(request_rec *r) +{ + if(!r->handler || strcmp(r->handler, "example-handler")) return(DECLINED); + ap_set_content_type(r, "text/plain"); + ap_rprintf(r, "Enabled: %u\n", config.enabled); + ap_rprintf(r, "Path: %s\n", config.path); + ap_rprintf(r, "TypeOfAction: %x\n", config.typeOfAction); + return OK; +} + +/* + ============================================================================== + The hook registration function (also initializes the default config values): + ============================================================================== + */ +static void register_hooks(apr_pool_t *pool) +{ + config.enabled = 1; + config.path = "/foo/bar"; + config.typeOfAction = 3; + ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST); +} +/* + ============================================================================== + Our module name tag: + ============================================================================== + */ +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + NULL, /* Per-directory configuration handler */ + NULL, /* Merge handler for per-directory configurations */ + NULL, /* Per-server configuration handler */ + NULL, /* Merge handler for per-server configurations */ + example_directives, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; +</pre> + + + + +<p> +In our httpd.conf file, we can now change the hard-coded configuration by +adding a few lines: +</p> +<pre class="prettyprint lang-config"> +ExampleEnabled On +ExamplePath "/usr/bin/foo" +ExampleAction file allow +</pre> + +<p> +And thus we apply the configuration, visit <code>/example</code> on our +web site, and we see the configuration has adapted to what we wrote in our +configuration file. +</p> + + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="context" id="context">Context aware configurations</a></h2> +<h3><a name="context_intro" id="context_intro">Introduction to context aware configurations</a></h3> +<p> +In Apache HTTP Server 2.4, different URLs, virtual hosts, directories etc can have very +different meanings to the user of the server, and thus different contexts +within which modules must operate. For example, let's assume you have this +configuration set up for mod_rewrite: +</p> +<pre class="prettyprint lang-config"> +<Directory "/var/www"> + RewriteCond %{HTTP_HOST} ^example.com$ + RewriteRule (.*) http://www.example.com/$1 +</Directory> +<Directory "/var/www/sub"> + RewriteRule ^foobar$ index.php?foobar=true +</Directory> +</pre> + +<p> +In this example, you will have set up two different contexts for +mod_rewrite:</p> +<ol> +<li>Inside <code>/var/www</code>, all requests for <code>http://example.com</code> must go to <code>http://www.example.com</code></li> +<li>Inside <code>/var/www/sub</code>, all requests for <code>foobar</code> must go to <code>index.php?foobar=true</code></li> +</ol> +<p> +If mod_rewrite (or the entire server for that matter) wasn't context aware, then +these rewrite rules would just apply to every and any request made, +regardless of where and how they were made, but since the module can pull +the context specific configuration straight from the server, it does not need +to know itself, which of the directives are valid in this context, since +the server takes care of this.</p> + +<p> +So how does a module get the specific configuration for the server, +directory or location in question? It does so by making one simple call: +</p> + + +<pre class="prettyprint lang-c"> +example_config *config = (example_config*) <a href="http://ci.apache.org/projects/httpd/trunk/doxygen/group__APACHE__CORE__CONFIG.html#ga1093a5908a384eacc929b028c79f2a02">ap_get_module_config</a>(r->per_dir_config, &example_module); +</pre> + + + +<p> +That's it! Of course, a whole lot goes on behind the scenes, which we will +discuss in this chapter, starting with how the server came to know what our +configuration looks like, and how it came to be set up as it is in the +specific context. +</p> + + +<h3><a name="context_base" id="context_base">Our basic configuration setup</a></h3> +<p>In this chapter, we will be working with a slightly modified version of +our previous context structure. We will set a <code>context</code> +variable that we can use to track which context configuration is being +used by the server in various places: +</p> + +<pre class="prettyprint lang-c"> +typedef struct { + char context[256]; + char path[256]; + int typeOfAction; + int enabled; +} example_config; +</pre> + + + +<p>Our handler for requests will also be modified, yet still very simple:</p> + + + +<pre class="prettyprint lang-c"> +static int example_handler(request_rec *r) +{ + if(!r->handler || strcmp(r->handler, "example-handler")) return(DECLINED); + example_config *config = (example_config*) ap_get_module_config(r->per_dir_config, &example_module); + ap_set_content_type(r, "text/plain"); + ap_rprintf("Enabled: %u\n", config->enabled); + ap_rprintf("Path: %s\n", config->path); + ap_rprintf("TypeOfAction: %x\n", config->typeOfAction); + ap_rprintf("Context: %s\n", config->context); + return OK; +} +</pre> + + + + + +<h3><a name="context_which" id="context_which">Choosing a context</a></h3> +<p> +Before we can start making our module context aware, we must first define, +which contexts we will accept. As we saw in the previous chapter, defining +a directive required five elements be set:</p> + + + +<pre class="prettyprint lang-c"> +AP_INIT_TAKE1("exampleEnabled", example_set_enabled, NULL, RSRC_CONF, "Enable or disable mod_example"), +</pre> + + + + +<p>The <code>RSRC_CONF</code> definition told the server that we would only allow +this directive in a global server context, but since we are now trying out +a context aware version of our module, we should set this to something +more lenient, namely the value <code>ACCESS_CONF</code>, which lets us use +the directive inside <Directory> and <Location> blocks. +</p> + + +<h3><a name="context_pool" id="context_pool">Using the server to allocate configuration slots</a></h3> +<p> A much smarter way to manage your configurations is by letting the server +help you create them. To do so, we must first start off by changing our +<em>name tag</em> to let the server know, that it should assist us in creating +and managing our configurations. Since we have chosen the per-directory +(or per-location) context for our module configurations, we'll add a +per-directory creator and merger function reference in our tag:</p> + + +<pre class="prettyprint lang-c"> +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + create_dir_conf, /* Per-directory configuration handler */ + merge_dir_conf, /* Merge handler for per-directory configurations */ + NULL, /* Per-server configuration handler */ + NULL, /* Merge handler for per-server configurations */ + directives, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; +</pre> + + + + + + + +<h3><a name="context_new" id="context_new">Creating new context configurations</a></h3> +<p> +Now that we have told the server to help us create and manage configurations, +our first step is to make a function for creating new, blank +configurations. We do so by creating the function we just referenced in +our name tag as the Per-directory configuration handler:</p> + +<pre class="prettyprint lang-c"> +void* example_create_dir_conf(apr_pool_t* pool, char* context) { + context = context ? context : "(undefined context)"; + example_config *cfg = apr_pcalloc(pool, sizeof(example_config)); + if(cfg) { + /* Set some default values */ + strcpy(cfg->context, x); + cfg->enabled = 0; + cfg->path = "/foo/bar"; + cfg->typeOfAction = 0x11; + } + return cfg; +} +</pre> + + + + + + +<h3><a name="context_merge" id="context_merge">Merging configurations</a></h3> +<p> +Our next step in creating a context aware configuration is merging +configurations. This part of the process particularly apply to scenarios +where you have a parent configuration and a child, such as the following: +</p> +<pre class="prettyprint lang-config"> +<Directory "/var/www"> + ExampleEnable On + ExamplePath /foo/bar + ExampleAction file allow +</Directory> +<Directory "/var/www/subdir"> + ExampleAction file deny +</Directory> +</pre> + +<p> +In this example, it is natural to assume that the directory <code> +/var/www/subdir</code> should inherit the value set for the <code>/var/www +</code> directory, as we did not specify a <code>ExampleEnable</code> nor +an <code>ExamplePath</code> for this directory. The server does not presume to +know if this is true, but cleverly does the following: +</p> +<ol> +<li>Creates a new configuration for <code>/var/www</code></li> +<li>Sets the configuration values according to the directives given for <code>/var/www</code></li> +<li>Creates a new configuration for <code>/var/www/subdir</code></li> +<li>Sets the configuration values according to the directives given for <code>/var/www/subdir</code></li> +<li><strong>Proposes a merge</strong> of the two configurations into a new configuration for <code>/var/www/subdir</code></li> +</ol> +<p> +This proposal is handled by the <code>merge_dir_conf</code> function we +referenced in our name tag. The purpose of this function is to assess the +two configurations and decide how they are to be merged:</p> + + + +<pre class="prettyprint lang-c"> +void* merge_dir_conf(apr_pool_t* pool, void* BASE, void* ADD) { + example_config* base = (example_config *) BASE ; /* This is what was set in the parent context */ + example_config* add = (example_config *) ADD ; /* This is what is set in the new context */ + example_config* conf = (example_config *) create_dir_conf(pool, "Merged configuration"); /* This will be the merged configuration */ + + /* Merge configurations */ + conf->enabled = ( add->enabled == 0 ) ? base->enabled : add->enabled ; + conf->typeOfAction = add->typeOfAction ? add->typeOfAction : base->typeOfAction; + strcpy(conf->path, strlen(add->path) ? add->path : base->path); + + return conf ; +} +</pre> + + + + + + +<h3><a name="context_example" id="context_example">Trying out our new context aware configurations</a></h3> +<p> +Now, let's try putting it all together to create a new module that is +context aware. First off, we'll create a configuration that lets us test +how the module works: +</p> +<pre class="prettyprint lang-config"> +<Location "/a"> + SetHandler example-handler + ExampleEnabled on + ExamplePath "/foo/bar" + ExampleAction file allow +</Location> + +<Location "/a/b"> + ExampleAction file deny + ExampleEnabled off +</Location> + +<Location "/a/b/c"> + ExampleAction db deny + ExamplePath "/foo/bar/baz" + ExampleEnabled on +</Location> +</pre> + +<p> +Then we'll assemble our module code. Note, that since we are now using our +name tag as reference when fetching configurations in our handler, I have +added some prototypes to keep the compiler happy: +</p> + + +<pre class="prettyprint lang-c"> +/*$6 + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + * mod_example_config.c + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + */ + + +#include <stdio.h> +#include "apr_hash.h" +#include "ap_config.h" +#include "ap_provider.h" +#include "httpd.h" +#include "http_core.h" +#include "http_config.h" +#include "http_log.h" +#include "http_protocol.h" +#include "http_request.h" + +/*$1 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Configuration structure + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +typedef struct +{ + char context[256]; + char path[256]; + int typeOfAction; + int enabled; +} example_config; + +/*$1 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Prototypes + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +static int example_handler(request_rec *r); +const char *example_set_enabled(cmd_parms *cmd, void *cfg, const char *arg); +const char *example_set_path(cmd_parms *cmd, void *cfg, const char *arg); +const char *example_set_action(cmd_parms *cmd, void *cfg, const char *arg1, const char *arg2); +void *create_dir_conf(apr_pool_t *pool, char *context); +void *merge_dir_conf(apr_pool_t *pool, void *BASE, void *ADD); +static void register_hooks(apr_pool_t *pool); + +/*$1 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Configuration directives + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +static const command_rec directives[] = +{ + AP_INIT_TAKE1("exampleEnabled", example_set_enabled, NULL, ACCESS_CONF, "Enable or disable mod_example"), + AP_INIT_TAKE1("examplePath", example_set_path, NULL, ACCESS_CONF, "The path to whatever"), + AP_INIT_TAKE2("exampleAction", example_set_action, NULL, ACCESS_CONF, "Special action value!"), + { NULL } +}; + +/*$1 + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + Our name tag + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +module AP_MODULE_DECLARE_DATA example_module = +{ + STANDARD20_MODULE_STUFF, + create_dir_conf, /* Per-directory configuration handler */ + merge_dir_conf, /* Merge handler for per-directory configurations */ + NULL, /* Per-server configuration handler */ + NULL, /* Merge handler for per-server configurations */ + directives, /* Any directives we may have for httpd */ + register_hooks /* Our hook registering function */ +}; + +/* + ======================================================================================================================= + Hook registration function + ======================================================================================================================= + */ +static void register_hooks(apr_pool_t *pool) +{ + ap_hook_handler(example_handler, NULL, NULL, APR_HOOK_LAST); +} + +/* + ======================================================================================================================= + Our example web service handler + ======================================================================================================================= + */ +static int example_handler(request_rec *r) +{ + if(!r->handler || strcmp(r->handler, "example-handler")) return(DECLINED); + + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *config = (example_config *) ap_get_module_config(r->per_dir_config, &example_module); + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + ap_set_content_type(r, "text/plain"); + ap_rprintf(r, "Enabled: %u\n", config->enabled); + ap_rprintf(r, "Path: %s\n", config->path); + ap_rprintf(r, "TypeOfAction: %x\n", config->typeOfAction); + ap_rprintf(r, "Context: %s\n", config->context); + return OK; +} + +/* + ======================================================================================================================= + Handler for the "exambleEnabled" directive + ======================================================================================================================= + */ +const char *example_set_enabled(cmd_parms *cmd, void *cfg, const char *arg) +{ + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *conf = (example_config *) cfg; + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + if(conf) + { + if(!strcasecmp(arg, "on")) + conf->enabled = 1; + else + conf->enabled = 0; + } + + return NULL; +} + +/* + ======================================================================================================================= + Handler for the "examplePath" directive + ======================================================================================================================= + */ +const char *example_set_path(cmd_parms *cmd, void *cfg, const char *arg) +{ + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *conf = (example_config *) cfg; + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + if(conf) + { + strcpy(conf->path, arg); + } + + return NULL; +} + +/* + ======================================================================================================================= + Handler for the "exampleAction" directive ; + Let's pretend this one takes one argument (file or db), and a second (deny or allow), ; + and we store it in a bit-wise manner. + ======================================================================================================================= + */ +const char *example_set_action(cmd_parms *cmd, void *cfg, const char *arg1, const char *arg2) +{ + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *conf = (example_config *) cfg; + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + if(conf) + { + { + if(!strcasecmp(arg1, "file")) + conf->typeOfAction = 0x01; + else + conf->typeOfAction = 0x02; + if(!strcasecmp(arg2, "deny")) + conf->typeOfAction += 0x10; + else + conf->typeOfAction += 0x20; + } + } + + return NULL; +} + +/* + ======================================================================================================================= + Function for creating new configurations for per-directory contexts + ======================================================================================================================= + */ +void *create_dir_conf(apr_pool_t *pool, char *context) +{ + context = context ? context : "Newly created configuration"; + + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *cfg = apr_pcalloc(pool, sizeof(example_config)); + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + if(cfg) + { + { + /* Set some default values */ + strcpy(cfg->context, context); + cfg->enabled = 0; + memset(cfg->path, 0, 256); + cfg->typeOfAction = 0x00; + } + } + + return cfg; +} + +/* + ======================================================================================================================= + Merging function for configurations + ======================================================================================================================= + */ +void *merge_dir_conf(apr_pool_t *pool, void *BASE, void *ADD) +{ + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + example_config *base = (example_config *) BASE; + example_config *add = (example_config *) ADD; + example_config *conf = (example_config *) create_dir_conf(pool, "Merged configuration"); + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + conf->enabled = (add->enabled == 0) ? base->enabled : add->enabled; + conf->typeOfAction = add->typeOfAction ? add->typeOfAction : base->typeOfAction; + strcpy(conf->path, strlen(add->path) ? add->path : base->path); + return conf; +} +</pre> + + + + + + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="summary" id="summary">Summing up</a></h2> +<p> +We have now looked at how to create simple modules for Apache HTTP Server 2.4 and +configuring them. What you do next is entirely up to you, but it is my +hope that something valuable has come out of reading this documentation. +If you have questions on how to further develop modules, you are welcome +to join our <a href="http://httpd.apache.org/lists.html">mailing lists</a> +or check out the rest of our documentation for further tips. +</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="snippets" id="snippets">Some useful snippets of code</a></h2> + +<h3><a name="get_post" id="get_post">Retrieve variables from POST form data</a></h3> + + + +<pre class="prettyprint lang-c"> +typedef struct { + const char* key; + const char* value; +} keyValuePair; + +keyValuePair* readPost(request_req* r) { + apr_array_header_t *pairs = NULL; + apr_off_t len; + apr_size_t size; + int res; + int i = 0; + char *buffer; + keyValuePair* kvp; + + res = ap_parse_form_data(r, NULL, &pairs, -1, HUGE_STRING_LEN); + if (res != OK || !pairs) return NULL; /* Return NULL if we failed or if there are is no POST data */ + kvp = apr_pcalloc(r->pool, sizeof(keyValuePair) * (pairs->nelts + 1)); + while (pairs && !apr_is_empty_array(pairs)) { + i++; + ap_form_pair_t *pair = (ap_form_pair_t *) apr_array_pop(pairs); + apr_brigade_length(pair->value, 1, &len); + size = (apr_size_t) len; + buffer = apr_palloc(r->pool, size + 1); + apr_brigade_flatten(pair->value, buffer, &size); + buffer[len] = 0; + kvp[i]->key = apr_pstrdup(r->pool, pair->name); + kvp[i]->value = buffer; + } + return kvp; +} + +static int example_handler(request_req *r) +{ + /*~~~~~~~~~~~~~~~~~~~~~~*/ + + keyValuePair* formData; + /*~~~~~~~~~~~~~~~~~~~~~~*/ + + formData = readPost(); + if (formData) { + int i; + for (i = 0; formData[i]; i++) { + ap_rprintf(r, "%s = %s\n", formData[i]->key, formData[i]->value); + } + } + return OK; +} +</pre> + + + + + + + <h3><a name="headers_out" id="headers_out">Printing out every HTTP header received</a></h3> + + + +<pre class="prettyprint lang-c"> +static int example_handler(request_req *r) +{ + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + const apr_array_header_t *fields; + int i; + apr_table_entry_t *e = 0; + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + fields = apr_table_elts(r->headers_in); + e = (apr_table_entry_t *) fields->elts; + for(i = 0; i < fields->nelts; i++) { + ap_rprintf(r, "<b>%s</b>: %s<br/>", e[i].key, e[i].val); + } + return OK; +} +</pre> + + + + + + + <h3><a name="request_body" id="request_body">Reading the request body into memory</a></h3> + + + +<pre class="prettyprint lang-c"> +static int util_read(request_rec *r, const char **rbuf, apr_off_t *size) +{ + /*~~~~~~~~*/ + int rc = OK; + /*~~~~~~~~*/ + + if((rc = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR))) { + return(rc); + } + + if(ap_should_client_block(r)) { + + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + char argsbuffer[HUGE_STRING_LEN]; + apr_off_t rsize, len_read, rpos = 0; + apr_off_t length = r->remaining; + /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/ + + *rbuf = (const char *) apr_pcalloc(r->pool, (apr_size_t) (length + 1)); + *size = length; + while((len_read = ap_get_client_block(r, argsbuffer, sizeof(argsbuffer))) > 0) { + if((rpos + len_read) > length) { + rsize = length - rpos; + } + else { + rsize = len_read; + } + + memcpy((char *) *rbuf + rpos, argsbuffer, (size_t) rsize); + rpos += rsize; + } + } + return(rc); +} + +static int example_handler(request_req* r) +{ + /*~~~~~~~~~~~~~~~~*/ + apr_off_t size; + const char *buffer; + /*~~~~~~~~~~~~~~~~*/ + + if(util_read(r, &data, &size) == OK) { + ap_rprintf("We read a request body that was %u bytes long", size); + } + return OK; +} + </pre> + + + + + + + +</div></div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/developer/modguide.html" title="English"> en </a></p> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/modguide.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
\ No newline at end of file diff --git a/docs/manual/developer/modules.html.en b/docs/manual/developer/modules.html.en index df68098d..d2c8cd3e 100644 --- a/docs/manual/developer/modules.html.en +++ b/docs/manual/developer/modules.html.en @@ -8,10 +8,13 @@ <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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -29,7 +32,7 @@ </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> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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> @@ -125,7 +128,7 @@ static void register_hooks(void) <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 + creating your module definition. The old definition looked like</p> <div class="example"><pre> @@ -277,7 +280,28 @@ module MODULE_VAR_EXPORT <var>module_name</var>_module = <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"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/modules.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/modules.html.ja.utf8 b/docs/manual/developer/modules.html.ja.utf8 index d8cf5d64..b7d9ed55 100644 --- a/docs/manual/developer/modules.html.ja.utf8 +++ b/docs/manual/developer/modules.html.ja.utf8 @@ -8,10 +8,13 @@ <title>モジュールの Apache 1.3 から Apache 2.0 への移植 - Apache HTTP サーバ</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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <link href="../images/favicon.ico" rel="shortcut icon" /></head> <body id="manual-page"><div id="page-header"> -<p class="menu"><a href="../mod/">モジュール</a> | <a href="../mod/directives.html">ディレクティブ</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">用語</a> | <a href="../sitemap.html">サイトマップ</a></p> +<p class="menu"><a href="../mod/">モジュール</a> | <a href="../mod/directives.html">ディレクティブ</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">用語</a> | <a href="../sitemap.html">サイトマップ</a></p> <p class="apache">Apache HTTP サーバ バージョン 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -33,7 +36,7 @@ </div> <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#easy">簡単な変更点</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#messy">もっと厄介な変更点…</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">コメント</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">簡単な変更点</a></h2> @@ -272,7 +275,28 @@ module MODULE_VAR_EXPORT <var>module_name</var>_module = <div class="bottomlang"> <p><span>翻訳済み言語: </span><a href="../en/developer/modules.html" hreflang="en" rel="alternate" title="English"> en </a> | <a href="../ja/developer/modules.html" title="Japanese"> ja </a></p> -</div><div id="footer"> +</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">コメント</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/modules.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <p class="apache">Copyright 2012 The Apache Software Foundation.<br />この文書は <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a> のライセンスで提供されています。.</p> -<p class="menu"><a href="../mod/">モジュール</a> | <a href="../mod/directives.html">ディレクティブ</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">用語</a> | <a href="../sitemap.html">サイトマップ</a></p></div> +<p class="menu"><a href="../mod/">モジュール</a> | <a href="../mod/directives.html">ディレクティブ</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">用語</a> | <a href="../sitemap.html">サイトマップ</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/new_api_2_4.html.en b/docs/manual/developer/new_api_2_4.html.en index 5efb1d34..c294254f 100644 --- a/docs/manual/developer/new_api_2_4.html.en +++ b/docs/manual/developer/new_api_2_4.html.en @@ -8,10 +8,13 @@ <title>API Changes in Apache HTTP Server 2.4 since 2.2 - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -46,7 +49,7 @@ </div> <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#api_changes">Changed APIs</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#upgrading">Specific information on upgrading modules from 2.2</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="api_changes" id="api_changes">Changed APIs</a></h2> @@ -433,6 +436,14 @@ would not have had a chance to enable support for this function.</dd> + <dt><code>ap_requires()</code></dt> + <dd>The core server now provides better infrastructure for handling + <code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code> configuration. + Register an auth provider function for each supported entity using + <code>ap_register_auth_provider()</code>. The function will be + called as necessary during <code class="directive">Require</code> + processing. (Consult bundled modules for detailed examples.)</dd> + <dt><code>ap_server_conf->process->pool</code> userdata</dt> <dd> @@ -542,13 +553,43 @@ <dt>Implement cleanups which clear pointer variables</dt> <dd>Use <code>ap_pool_cleanup_set_null()</code>.</dd> + + <dt>Create run-time files such as shared memory files, pid files, + etc.</dt> + <dd>Use <code>ap_runtime_dir_relative()</code> so that the global + configuration for the location of such files, either by the + <code>DEFAULT_REL_RUNTIMEDIR</code> compile setting or the + <code class="directive"><a href="../mod/core.html#defaultruntimedir">DefaultRuntimeDir</a></code> directive, + will be respected. <em>Apache httpd 2.4.2 and above.</em></dd> + </dl> </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/new_api_2_4.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/new_api_2_4.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/output-filters.html.en b/docs/manual/developer/output-filters.html.en index dd140a19..66dcadc7 100644 --- a/docs/manual/developer/output-filters.html.en +++ b/docs/manual/developer/output-filters.html.en @@ -8,10 +8,13 @@ <title>Guide to writing output filters - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</p> <img alt="" src="../images/feather.gif" /></div> <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> @@ -39,7 +42,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#buffer">Buffering buckets</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#nonblock">Non-blocking bucket reads</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#rules">Ten rules for output filters</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="basics" id="basics">Filters and bucket brigades</a></h2> @@ -126,18 +129,15 @@ brigade should have no side effects (such as changing any state private to the filter).</p> - <div class="example"><h3>How to handle an empty brigade</h3><p><code> + <div class="example"><h3>How to handle an empty brigade</h3><pre class="prettyprint lang-c"> apr_status_t dummy_filter(ap_filter_t *f, apr_bucket_brigade *bb)<br /> - {<br /> - <span class="indent"> - if (APR_BRIGADE_EMPTY(bb)) {<br /> - <span class="indent"> - return APR_SUCCESS;<br /> - </span> - }<br /> - ....<br /> - </span> - </code></p></div> + { + if (APR_BRIGADE_EMPTY(bb)) { + return APR_SUCCESS; + } + .... + </pre> +</div> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -254,20 +254,20 @@ <p>Taking an example which loops through the entire brigade as follows:</p> - <div class="example"><h3>Bad output filter -- do not imitate!</h3><p><code> - apr_bucket *e = APR_BRIGADE_FIRST(bb);<br /> -const char *data;<br /> -apr_size_t len;<br /> -<br /> -while (e != APR_BRIGADE_SENTINEL(bb)) {<br /> -<span class="indent"> - apr_bucket_read(e, &data, &length, APR_BLOCK_READ);<br /> - e = APR_BUCKET_NEXT(e);<br /> -</span> -}<br /> -<br /> + <div class="example"><h3>Bad output filter -- do not imitate!</h3><pre class="prettyprint lang-c"> +apr_bucket *e = APR_BRIGADE_FIRST(bb); +const char *data; +apr_size_t len; + +while (e != APR_BRIGADE_SENTINEL(bb)) { + apr_bucket_read(e, &data, &length, APR_BLOCK_READ); + e = APR_BUCKET_NEXT(e); + +} + return ap_pass_brigade(bb); - </code></p></div> +</pre> +</div> <p>The above implementation would consume memory proportional to content size. If passed a <code>FILE</code> bucket, for example, @@ -279,26 +279,25 @@ return ap_pass_brigade(bb); amount of memory to filter any brigade; a temporary brigade is needed and must be allocated only once per response, see the <a href="#state">Maintaining state</a> section.</p> - <div class="example"><h3>Better output filter</h3><p><code> -apr_bucket *e;<br /> -const char *data;<br /> -apr_size_t len;<br /> -<br /> -while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) {<br /> -<span class="indent"> - rv = apr_bucket_read(e, &data, &length, APR_BLOCK_READ);<br /> - if (rv) ...;<br /> - /* Remove bucket e from bb. */<br /> - APR_BUCKET_REMOVE(e);<br /> - /* Insert it into temporary brigade. */<br /> - APR_BRIGADE_INSERT_HEAD(tmpbb, e);<br /> - /* Pass brigade downstream. */<br /> - rv = ap_pass_brigade(f->next, tmpbb);<br /> - if (rv) ...;<br /> - apr_brigade_cleanup(tmpbb);<br /> -</span> + <div class="example"><h3>Better output filter</h3><pre class="prettyprint lang-c"> +apr_bucket *e; +const char *data; +apr_size_t len; + +while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) { + rv = apr_bucket_read(e, &data, &length, APR_BLOCK_READ); + if (rv) ...; + /* Remove bucket e from bb. */ + APR_BUCKET_REMOVE(e); + /* Insert it into temporary brigade. */ + APR_BRIGADE_INSERT_HEAD(tmpbb, e); + /* Pass brigade downstream. */ + rv = ap_pass_brigade(f->next, tmpbb); + if (rv) ...; + apr_brigade_cleanup(tmpbb); } - </code></p></div> +</pre> +</div> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -312,34 +311,32 @@ while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) {<br /> temporary brigade in such a structure, to avoid having to allocate a new brigade per invocation as described in the <a href="#brigade">Brigade structure</a> section.</p> - <div class="example"><h3>Example code to maintain filter state</h3><p><code> -struct dummy_state {<br /> -<span class="indent"> - apr_bucket_brigade *tmpbb;<br /> - int filter_state;<br /> - ....<br /> -</span> -};<br /> -<br /> -apr_status_t dummy_filter(ap_filter_t *f, apr_bucket_brigade *bb)<br /> -{<br /> -<span class="indent"> - struct dummy_state *state;<br /> -<br /> - state = f->ctx;<br /> - if (state == NULL) {<br /> - <span class="indent"> + <div class="example"><h3>Example code to maintain filter state</h3><pre class="prettyprint lang-c"> +struct dummy_state { + apr_bucket_brigade *tmpbb; + int filter_state; + .... +}; + +apr_status_t dummy_filter(ap_filter_t *f, apr_bucket_brigade *bb) +{ + + struct dummy_state *state; + + state = f->ctx; + if (state == NULL) { + /* First invocation for this response: initialise state structure. - */<br /> - f->ctx = state = apr_palloc(sizeof *state, f->r->pool);<br /> -<br /> - state->tmpbb = apr_brigade_create(f->r->pool, f->c->bucket_alloc);<br /> - state->filter_state = ...;<br /> - </span> - }<br /> + */ + f->ctx = state = apr_palloc(sizeof *state, f->r->pool); + + state->tmpbb = apr_brigade_create(f->r->pool, f->c->bucket_alloc); + state->filter_state = ...; + + } ... -</span> - </code></p></div> +</pre> +</div> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -413,40 +410,35 @@ apr_status_t dummy_filter(ap_filter_t *f, apr_bucket_brigade *bb)<br /> script; reading from such a bucket will block when waiting for the CGI script to produce more output.</p> - <div class="example"><h3>Example code using non-blocking bucket reads</h3><p><code> - -apr_bucket *e;<br /> -apr_read_type_e mode = APR_NONBLOCK_READ;<br /> -<br /> -while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) {<br /> -<span class="indent"> - apr_status_t rv;<br /> -<br /> - rv = apr_bucket_read(e, &data, &length, mode);<br /> - if (rv == APR_EAGAIN && mode == APR_NONBLOCK_READ) {<br /> - <span class="indent"> - /* Pass down a brigade containing a flush bucket: */<br /> - APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_flush_create(...));<br /> - rv = ap_pass_brigade(f->next, tmpbb);<br /> - apr_brigade_cleanup(tmpbb);<br /> - if (rv != APR_SUCCESS) return rv;<br /> -<br /> - /* Retry, using a blocking read. */<br /> - mode = APR_BLOCK_READ;<br /> - continue;<br /> - </span> - } else if (rv != APR_SUCCESS) {<br /> - <span class="indent"> - /* handle errors */<br /> - </span> - }<br /> -<br /> - /* Next time, try a non-blocking read first. */<br /> - mode = APR_NONBLOCK_READ;<br /> - ...<br /> -</span> + <div class="example"><h3>Example code using non-blocking bucket reads</h3><pre class="prettyprint lang-c"> +apr_bucket *e; +apr_read_type_e mode = APR_NONBLOCK_READ; + +while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) { + apr_status_t rv; + + rv = apr_bucket_read(e, &data, &length, mode); + if (rv == APR_EAGAIN && mode == APR_NONBLOCK_READ) { + + /* Pass down a brigade containing a flush bucket: */ + APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_flush_create(...)); + rv = ap_pass_brigade(f->next, tmpbb); + apr_brigade_cleanup(tmpbb); + if (rv != APR_SUCCESS) return rv; + + /* Retry, using a blocking read. */ + mode = APR_BLOCK_READ; + continue; + } else if (rv != APR_SUCCESS) { + /* handle errors */ + } + + /* Next time, try a non-blocking read first. */ + mode = APR_NONBLOCK_READ; + ... } - </code></p></div> +</pre> +</div> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -503,7 +495,28 @@ while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) {<br /> </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/output-filters.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/output-filters.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/request.html.en b/docs/manual/developer/request.html.en index 384abb8a..7b18be2f 100644 --- a/docs/manual/developer/request.html.en +++ b/docs/manual/developer/request.html.en @@ -5,18 +5,21 @@ This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> -<title>Request Processing in Apache 2.0 - Apache HTTP Server</title> +<title>Request Processing in the Apache HTTP Server 2.x - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Request Processing in Apache 2.0</h1> +<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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Request Processing in the Apache HTTP Server 2.x</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="../en/developer/request.html" title="English"> en </a></p> </div> @@ -26,15 +29,15 @@ revision!</p> </div> - <p>Several changes in Apache 2.0 affect the internal request + <p>Several changes in 2.0 and above affect the internal request processing mechanics. Module authors need to be aware of these changes so they may take advantage of the optimizations and security enhancements.</p> <p>The first major change is to the subrequest and redirect mechanisms. There were a number of different code paths in - Apache 1.3 to attempt to optimize subrequest or redirect - behavior. As patches were introduced to 2.0, these + the Apache HTTP Server 1.3 to attempt to optimize subrequest + or redirect behavior. As patches were introduced to 2.0, these optimizations (and the server behavior) were quickly broken due to this duplication of code. All duplicate code has been folded back into <code>ap_process_request_internal()</code> to prevent @@ -45,7 +48,7 @@ and correct implementation of the HTTP server RFC. Additional goals include security, scalability and optimization. New methods were sought to optimize the server (beyond the - performance of Apache 1.3) without introducing fragile or + performance of 1.3) without introducing fragile or insecure code.</p> </div> <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#processing">The Request Processing Cycle</a></li> @@ -53,7 +56,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#security">The Security Phase</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#preparation">The Preparation Phase</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#handler">The Handler Phase</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="processing" id="processing">The Request Processing Cycle</a></h2> @@ -65,7 +68,7 @@ <p>To streamline requests, the module author can take advantage of the hooks offered to drop out of the request cycle early, or - to bypass core Apache hooks which are irrelevant (and costly in + to bypass core hooks which are irrelevant (and costly in terms of CPU.)</p> </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> @@ -78,7 +81,7 @@ <code>parsed_uri.path</code> element is unset. The module has no further control of this one-time unescape operation, either failing to unescape or multiply unescaping the URL leads to security - reprecussions.</p> + repercussions.</p> <h3><a name="strip" id="strip">Strips Parent and This Elements from the @@ -147,7 +150,7 @@ <h2><a name="security" id="security">The Security Phase</a></h2> <p>Needs Documentation. Code is:</p> - <div class="example"><pre> + <pre class="prettyprint lang-c"> if ((access_status = ap_run_access_checker(r)) != 0) { return decl_die(access_status, "check access", r); } @@ -159,7 +162,8 @@ if ((access_status = ap_run_auth_checker(r)) != 0) { return decl_die(access_status, "check authorization", r); } - </pre></div> + </pre> + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> <div class="section"> <h2><a name="preparation" id="preparation">The Preparation Phase</a></h2> @@ -216,7 +220,28 @@ </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/request.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/request.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
\ No newline at end of file diff --git a/docs/manual/developer/thread_safety.html.en b/docs/manual/developer/thread_safety.html.en index 86895c12..3afafeb4 100644 --- a/docs/manual/developer/thread_safety.html.en +++ b/docs/manual/developer/thread_safety.html.en @@ -5,27 +5,30 @@ This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --> -<title>Apache 2.0 Thread Safety Issues - Apache HTTP Server</title> +<title>Apache HTTP Server 2.x Thread Safety Issues - 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="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.js" type="text/javascript"> +</script> + <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="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> <p class="apache">Apache HTTP Server Version 2.4</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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Apache 2.0 Thread Safety Issues</h1> +<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 2.4</a> > <a href="./">Developer Documentation</a></div><div id="page-content"><div id="preamble"><h1>Apache HTTP Server 2.x Thread Safety Issues</h1> <div class="toplang"> <p><span>Available Languages: </span><a href="../en/developer/thread_safety.html" title="English"> en </a></p> </div> - <p>When using any of the threaded mpms in Apache 2.0 it is important + <p>When using any of the threaded mpms in the Apache HTTP Server 2.x it is important that every function called from Apache be thread safe. When linking in 3rd party extensions it can be difficult to determine whether the resulting server will be thread safe. Casual testing generally won't tell you this - either as thread safety problems can lead to subtle race conditons that + either as thread safety problems can lead to subtle race conditions that may only show up in certain conditions under heavy load.</p> </div> <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#variables">Global and static variables</a></li> @@ -33,7 +36,7 @@ <li><img alt="" src="../images/down.gif" /> <a href="#functions">Common standard troublesome functions</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#commonlibs">Common 3rd Party Libraries</a></li> <li><img alt="" src="../images/down.gif" /> <a href="#liblist">Library List</a></li> -</ul></div> +</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="variables" id="variables">Global and static variables</a></h2> @@ -275,7 +278,28 @@ </div></div> <div class="bottomlang"> <p><span>Available Languages: </span><a href="../en/developer/thread_safety.html" title="English"> en </a></p> -</div><div id="footer"> +</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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/developer/thread_safety.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> <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> -<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> +<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> </body></html>
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