diff options
Diffstat (limited to 'docs/manual/new_features_2_2.html.en')
| -rw-r--r-- | docs/manual/new_features_2_2.html.en | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/docs/manual/new_features_2_2.html.en b/docs/manual/new_features_2_2.html.en new file mode 100644 index 0000000..be23b4f --- /dev/null +++ b/docs/manual/new_features_2_2.html.en @@ -0,0 +1,305 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!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> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>Overview of new features in Apache HTTP Server 2.2 - Apache HTTP Server Version 2.4</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.min.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.png" /></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>Overview of new features in Apache HTTP Server 2.2</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="./en/new_features_2_2.html" title="English"> en </a> | +<a href="./fr/new_features_2_2.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="./ko/new_features_2_2.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="./pt-br/new_features_2_2.html" hreflang="pt-br" rel="alternate" title="Português (Brasil)"> pt-br </a> | +<a href="./tr/new_features_2_2.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> +</div> + + <p>This document describes some of the major changes between the + 2.0 and 2.2 versions of the Apache HTTP Server. For new features since + version 1.3, see the <a href="new_features_2_0.html">2.0 new features</a> + document.</p> +</div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#core">Core Enhancements</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#module">Module Enhancements</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#programs">Program Enhancements</a></li> +<li><img alt="" src="./images/down.gif" /> <a href="#developer">Module Developer Changes</a></li> +</ul><h3>See also</h3><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="core" id="core">Core Enhancements</a></h2> + + <dl> + + <dt>Authn/Authz</dt> + <dd>The bundled authentication and authorization modules have + been refactored. The new mod_authn_alias(already removed from 2.3/2.4) + module can greatly simplify certain authentication configurations. + See <a href="#module">module name changes</a>, and + <a href="#developer">the developer changes</a> for more + information about how these changes affects users and module + writers.</dd> + + <dt>Caching</dt> + <dd><code class="module"><a href="./mod/mod_cache.html">mod_cache</a></code>, <code class="module"><a href="./mod/mod_cache_disk.html">mod_cache_disk</a></code>, and + mod_mem_cache(already removed from 2.3/2.4) have undergone a lot of changes, and + are now considered production-quality. <code class="program"><a href="./programs/htcacheclean.html">htcacheclean</a></code> + has been introduced to clean up <code class="module"><a href="./mod/mod_cache_disk.html">mod_cache_disk</a></code> + setups.</dd> + + <dt>Configuration</dt> + <dd>The default configuration layout has been simplified and + modularised. Configuration snippets which can be used to + enable commonly-used features are now bundled with Apache, and + can be easily added to the main server config.</dd> + + <dt>Graceful stop</dt> + <dd>The <code class="module"><a href="./mod/prefork.html">prefork</a></code>, <code class="module"><a href="./mod/worker.html">worker</a></code> and + <code class="module"><a href="./mod/event.html">event</a></code> MPMs now allow <code class="program"><a href="./programs/httpd.html">httpd</a></code> + to be shutdown gracefully via the + <a href="stopping.html#gracefulstop"><code>graceful-stop</code></a> + signal. The <code class="directive"><a href="./mod/mpm_common.html#gracefulshutdowntimeout">GracefulShutdownTimeout</a></code> directive + has been added to specify an optional timeout, after which + <code class="program"><a href="./programs/httpd.html">httpd</a></code> will terminate regardless of the status + of any requests being served.</dd> + + <dt>Proxying</dt> + <dd>The new <code class="module"><a href="./mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> module provides + load balancing services for <code class="module"><a href="./mod/mod_proxy.html">mod_proxy</a></code>. + The new <code class="module"><a href="./mod/mod_proxy_ajp.html">mod_proxy_ajp</a></code> module adds support for the + <code>Apache JServ Protocol version 1.3</code> used by + <a href="http://tomcat.apache.org/">Apache Tomcat</a>.</dd> + + <dt>Regular Expression Library Updated</dt> + <dd>Version 5.0 of the + <a href="http://www.pcre.org/">Perl Compatible Regular Expression + Library</a> (PCRE) is now included. <code class="program"><a href="./programs/httpd.html">httpd</a></code> can be + configured to use a system installation of PCRE by passing the + <code>--with-pcre</code> flag to configure.</dd> + + <dt>Smart Filtering</dt> + <dd><code class="module"><a href="./mod/mod_filter.html">mod_filter</a></code> introduces dynamic configuration + to the output filter chain. It enables filters to be conditionally + inserted, based on any Request or Response header or environment + variable, and dispenses with the more problematic dependencies and + ordering problems in the 2.0 architecture.</dd> + + <dt>Large File Support</dt> + <dd><code class="program"><a href="./programs/httpd.html">httpd</a></code> is now built with support for files larger + than 2GB on modern 32-bit Unix systems. Support for handling + >2GB request bodies has also been added.</dd> + + <dt>Event MPM</dt> + <dd>The <code class="module"><a href="./mod/event.html">event</a></code> MPM uses a separate thread to handle + Keep Alive requests and accepting connections. Keep Alive requests + have traditionally required httpd to dedicate a worker to handle it. + This dedicated worker could not be used again until the Keep Alive + timeout was reached.</dd> + + <dt>SQL Database Support</dt> + <dd><code class="module"><a href="./mod/mod_dbd.html">mod_dbd</a></code>, together with the <code>apr_dbd</code> + framework, brings direct SQL support to modules that need it. + Supports connection pooling in threaded MPMs.</dd> + + </dl> + </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> +<div class="section"> +<h2><a name="module" id="module">Module Enhancements</a></h2> + + <dl> + <dt>Authn/Authz</dt> + <dd>Modules in the aaa directory have been renamed and offer + better support for digest authentication. For example, + <code>mod_auth</code> is now split into + <code class="module"><a href="./mod/mod_auth_basic.html">mod_auth_basic</a></code> and + <code class="module"><a href="./mod/mod_authn_file.html">mod_authn_file</a></code>; <code>mod_auth_dbm</code> is now + called <code class="module"><a href="./mod/mod_authn_dbm.html">mod_authn_dbm</a></code>; <code>mod_access</code> has + been renamed <code class="module"><a href="./mod/mod_authz_host.html">mod_authz_host</a></code>. There is also a new + mod_authn_alias(already removed from 2.3/2.4) module for simplifying + certain authentication configurations. + </dd> + + <dt><code class="module"><a href="./mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code></dt> + <dd>This module is a port of the 2.0 + <code>mod_auth_ldap</code> module to the 2.2 <code>Authn/Authz</code> + framework. New features include using LDAP attribute values and + complicated search filters in the + <code class="directive"><a href="./mod/mod_authz_core.html#require">Require</a></code> directive.</dd> + + <dt><code class="module"><a href="./mod/mod_authz_owner.html">mod_authz_owner</a></code></dt> + <dd>A new module that authorizes access to files based + on the owner of the file on the file system</dd> + + <dt><code class="module"><a href="./mod/mod_version.html">mod_version</a></code></dt> + <dd>A new module that allows configuration blocks to be enabled based on the + version number of the running server.</dd> + + <dt><code class="module"><a href="./mod/mod_info.html">mod_info</a></code></dt> + <dd>Added a new <code>?config</code> argument which will show + the configuration directives as parsed by Apache, including + their file name and line number. The module also + shows the order of all request hooks and additional + build information, similar to <code>httpd -V</code>.</dd> + + <dt><code class="module"><a href="./mod/mod_ssl.html">mod_ssl</a></code></dt> + + <dd>Added a support for + <a href="http://www.ietf.org/rfc/rfc2817.txt">RFC 2817</a>, which + allows connections to upgrade from clear text to TLS encryption.</dd> + + <dt><code class="module"><a href="./mod/mod_imagemap.html">mod_imagemap</a></code></dt> + <dd><code>mod_imap</code> has been renamed to + <code class="module"><a href="./mod/mod_imagemap.html">mod_imagemap</a></code> to avoid user confusion.</dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> +<div class="section"> +<h2><a name="programs" id="programs">Program Enhancements</a></h2> + + <dl> + <dt><code class="program"><a href="./programs/httpd.html">httpd</a></code></dt> + <dd>A new command line option <code>-M</code> has been added that + lists all modules that are loaded based on the current + configuration. Unlike the <code>-l</code> option, this list + includes DSOs loaded via <code class="module"><a href="./mod/mod_so.html">mod_so</a></code>.</dd> + + <dt><code class="program"><a href="./programs/httxt2dbm.html">httxt2dbm</a></code></dt> + <dd>A new program used to generate dbm files from text input, + for use in <code class="directive"><a href="./mod/mod_rewrite.html#rewritemap">RewriteMap</a></code> + with the <code>dbm</code> map type.</dd> + </dl> + </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> +<div class="section"> +<h2><a name="developer" id="developer">Module Developer Changes</a></h2> + + <dl> + <dt><a class="glossarylink" href="./glossary.html#apr" title="see glossary">APR</a> 1.0 API</dt> + + <dd>Apache 2.2 uses the APR 1.0 API. All deprecated functions and + symbols have been removed from <code>APR</code> and + <code>APR-Util</code>. For details, see the + <a href="http://apr.apache.org/">APR Website</a>.</dd> + + <dt>Authn/Authz</dt> + <dd>The bundled authentication and authorization modules have + been renamed along the following lines: + <ul> + <li><code>mod_auth_*</code> -> Modules that implement an HTTP + authentication mechanism</li> + <li><code>mod_authn_*</code> -> Modules that provide a backend + authentication provider</li> + <li><code>mod_authz_*</code> -> Modules that implement + authorization (or access)</li> + <li><code>mod_authnz_*</code> -> Module that implements both + authentication & authorization</li> + </ul> + There is a new authentication backend provider + scheme which greatly eases the construction of new authentication + backends.</dd> + + <dt>Connection Error Logging</dt> + + <dd>A new function, <code>ap_log_cerror</code> has been added to log + errors that occur with the client's connection. When logged, + the message includes the client IP address.</dd> + + <dt>Test Configuration Hook Added</dt> + + <dd>A new hook, <code>test_config</code> has been added to aid + modules that want to execute special code only when the user passes + <code>-t</code> to <code class="program"><a href="./programs/httpd.html">httpd</a></code>.</dd> + + <dt>Set Threaded MPM's Stacksize</dt> + + <dd>A new directive, <code class="directive"><a href="./mod/mpm_common.html#threadstacksize">ThreadStackSize</a></code> has been added to + set the stack size on all threaded MPMs. This is required + for some third-party modules on platforms with small default + thread stack size.</dd> + + <dt>Protocol handling for output filters</dt> + + <dd>In the past, every filter has been responsible for ensuring + that it generates the correct response headers where it affects + them. Filters can now delegate common protocol management to + <code class="module"><a href="./mod/mod_filter.html">mod_filter</a></code>, using the + <code>ap_register_output_filter_protocol</code> or + <code>ap_filter_protocol</code> calls.</dd> + + <dt>Monitor hook added</dt> + <dd>Monitor hook enables modules to run regular/scheduled jobs + in the parent (root) process.</dd> + + <dt>Regular expression API changes</dt> + + <dd>The <code>pcreposix.h</code> header is no longer available; + it is replaced by the new <code>ap_regex.h</code> header. The + POSIX.2 <code>regex.h</code> implementation exposed by the old + header is now available under the <code>ap_</code> namespace + from <code>ap_regex.h</code>. Calls to <code>regcomp</code>, + <code>regexec</code> and so on can be replaced by calls to + <code>ap_regcomp</code>, <code>ap_regexec</code>.</dd> + + <dt>DBD Framework (SQL Database API)</dt> + + <dd><p>With Apache 1.x and 2.0, modules requiring an SQL backend + had to take responsibility for managing it themselves. Apart + from reinventing the wheel, this can be very inefficient, for + example when several modules each maintain their own connections.</p> + + <p>Apache 2.1 and later provides the <code>ap_dbd</code> API for + managing database connections (including optimised strategies + for threaded and unthreaded MPMs), while APR 1.2 and later provides + the <code>apr_dbd</code> API for interacting with the database.</p> + + <p>New modules SHOULD now use these APIs for all SQL database + operations. Existing applications SHOULD be upgraded to use it + where feasible, either transparently or as a recommended option + to their users.</p></dd> + </dl> + </div></div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="./en/new_features_2_2.html" title="English"> en </a> | +<a href="./fr/new_features_2_2.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="./ko/new_features_2_2.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="./pt-br/new_features_2_2.html" hreflang="pt-br" rel="alternate" title="Português (Brasil)"> pt-br </a> | +<a href="./tr/new_features_2_2.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </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 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 Libera.chat, or sent to our <a href="https://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/new_features_2_2.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 2023 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 |