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15 <p class="apache">Apache HTTP Server Version 2.1</p>
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17 <div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div>
19 <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="./">Version 2.1</a></div><div id="page-content"><div id="preamble"><h1>Overview of new features in Apache 2.0</h1>
21 <p><span>Available Languages: </span><a href="./de/new_features_2_0.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
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30 <p>This document describes some of the major changes between the
31 1.3 and 2.0 versions of the Apache HTTP Server.</p>
33 <div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#core">Core Enhancements</a></li>
34 <li><img alt="" src="./images/down.gif" /> <a href="#module">Module Enhancements</a></li>
35 </ul><h3>See also</h3><ul class="seealso"><li><a href="upgrading.html">Upgrading to 2.0 from 1.3</a></li></ul></div>
36 <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
38 <h2><a name="core" id="core">Core Enhancements</a></h2>
42 <dt>Unix Threading</dt>
44 <dd>On Unix systems with POSIX threads support, Apache can
45 now run in a hybrid multiprocess, multithreaded mode. This
46 improves scalability for many, but not all configurations.</dd>
48 <dt>New Build System</dt>
50 <dd>The build system has been rewritten from scratch to be
51 based on <code>autoconf</code> and <code>libtool</code>.
52 This makes Apache's configuration system more similar to
53 that of other packages.</dd>
55 <dt>Multiprotocol Support</dt>
57 <dd>Apache now has some of the infrastructure in place to
58 support serving multiple protocols. <code class="module"><a href="./mod/mod_echo.html">mod_echo</a></code> has
59 been written as an example.</dd>
61 <dt>Better support for non-Unix
64 <dd>Apache 2.0 is faster and more stable on non-Unix
65 platforms such as BeOS, OS/2, and Windows. With the
66 introduction of platform-specific <a href="mpm.html">multi-processing modules</a> (MPMs) and the
67 Apache Portable Runtime (APR), these platforms are now
68 implemented in their native API, avoiding the often buggy and
69 poorly performing POSIX-emulation layers.</dd>
71 <dt>New Apache API</dt>
73 <dd>The API for modules has changed significantly for 2.0.
74 Many of the module-ordering/-priority problems from 1.3 should
75 be gone. 2.0 does much of this automatically, and module ordering
76 is now done per-hook to allow more flexibility. Also, new calls
77 have been added that provide additional module capabilities
78 without patching the core Apache server.</dd>
82 <dd>On systems where IPv6 is supported by the underlying
83 Apache Portable Runtime library, Apache gets IPv6 listening
84 sockets by default. Additionally, the <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>, <code class="directive"><a href="./mod/core.html#namevirtualhost">NameVirtualHost</a></code>, and <code class="directive"><a href="./mod/core.html#virtualhost">VirtualHost</a></code> directives support
85 IPv6 numeric address strings (e.g., "<code>Listen
86 [fe80::1]:8080</code>").</dd>
90 <dd>Apache modules may now be written as filters which act on
91 the stream of content as it is delivered to or from the
92 server. This allows, for example, the output of CGI scripts to
93 be parsed for Server Side Include directives using the
94 <code>INCLUDES</code> filter in <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>. The
95 module <code class="module"><a href="./mod/mod_ext_filter.html">mod_ext_filter</a></code> allows external programs to
96 act as filters in much the same way that CGI programs can act as
99 <dt>Multilanguage Error Responses</dt>
101 <dd>Error response messages to the browser are now provided in
102 several languages, using SSI documents. They may be customized
103 by the administrator to achieve a consistent look and feel.</dd>
105 <dt>Simplified configuration</dt>
107 <dd>Many confusing directives have been simplified. The often
108 confusing <code>Port</code> and <code>BindAddress</code> directives
109 are gone; only the <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
110 directive is used for IP address binding; the <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code> directive specifies the
111 server name and port number only for redirection and vhost
114 <dt>Native Windows NT Unicode Support</dt>
116 <dd>Apache 2.0 on Windows NT now uses utf-8 for all filename
117 encodings. These directly translate to the underlying Unicode
118 file system, providing multilanguage support for all Windows
119 NT-based installations, including Windows 2000 and Windows XP.
120 <em>This support does not extend to Windows 95, 98 or ME, which
121 continue to use the machine's local codepage for filesystem
124 <dt>Regular Expression Library Updated</dt>
126 <dd>Apache 2.0 includes the <a href="http://www.pcre.org/">Perl
127 Compatible Regular Expression Library</a> (PCRE). All regular
128 expression evaluation now uses the more powerful Perl 5
132 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
133 <div class="section">
134 <h2><a name="module" id="module">Module Enhancements</a></h2>
138 <dt><code class="module"><a href="./mod/mod_ssl.html">mod_ssl</a></code></dt>
140 <dd>New module in Apache 2.0. This module is an interface
141 to the SSL/TLS encryption protocols provided by
144 <dt><code class="module"><a href="./mod/mod_dav.html">mod_dav</a></code></dt>
146 <dd>New module in Apache 2.0. This module implements the HTTP
147 Distributed Authoring and Versioning (DAV) specification for
148 posting and maintaining web content.</dd>
150 <dt><code class="module"><a href="./mod/mod_deflate.html">mod_deflate</a></code></dt>
152 <dd>New module in Apache 2.0. This module allows supporting
153 browsers to request that content be compressed before delivery,
154 saving network bandwidth.</dd>
156 <dt><code class="module"><a href="./mod/mod_auth_ldap.html">mod_auth_ldap</a></code></dt>
158 <dd>New module in Apache 2.0.41. This module allows an LDAP
159 database to be used to store credentials for HTTP Basic
160 Authentication. A companion module, <code class="module"><a href="./mod/mod_ldap.html">mod_ldap</a></code>
161 provides connection pooling and results caching.</dd>
163 <dt><code class="module"><a href="./mod/mod_auth_digest.html">mod_auth_digest</a></code></dt>
165 <dd>Includes additional support for session caching across
166 processes using shared memory.</dd>
168 <dt><code class="module"><a href="./mod/mod_charset_lite.html">mod_charset_lite</a></code></dt>
170 <dd>New module in Apache 2.0. This experimental module allows
171 for character set translation or recoding.</dd>
173 <dt><code class="module"><a href="./mod/mod_file_cache.html">mod_file_cache</a></code></dt>
175 <dd>New module in Apache 2.0. This module includes the
176 functionality of <code>mod_mmap_static</code> in Apache 1.3,
177 plus adds further caching abilities.</dd>
179 <dt><code class="module"><a href="./mod/mod_headers.html">mod_headers</a></code></dt>
181 <dd>This module is much more flexible in Apache 2.0. It can now
182 modify request headers used by <code class="module"><a href="./mod/mod_proxy.html">mod_proxy</a></code>, and
183 it can conditionally set response headers.</dd>
185 <dt><code class="module"><a href="./mod/mod_proxy.html">mod_proxy</a></code></dt>
187 <dd>The proxy module has been completely rewritten to take
188 advantage of the new filter infrastructure and to implement a
189 more reliable, HTTP/1.1 compliant proxy. In addition, new
190 <code class="directive"><a href="./mod/mod_proxy.html#proxy"><Proxy></a></code>
191 configuration sections provide more readable (and internally
192 faster) control of proxied sites; overloaded <code><Directory
193 "proxy:..."></code> configuration are not supported. The module
194 is now divided into specific protocol support modules including
195 <code>proxy_connect</code>, <code>proxy_ftp</code> and
196 <code>proxy_http</code>.</dd>
198 <dt><code class="module"><a href="./mod/mod_negotiation.html">mod_negotiation</a></code></dt>
200 <dd>A new <code class="directive"><a href="./mod/mod_negotiation.html#forcelanguagepriority">ForceLanguagePriority</a></code> directive can be used to assure that
201 the client receives a single document in all cases, rather than
202 NOT ACCEPTABLE or MULTIPLE CHOICES responses. In addition, the
203 negotiation and MultiViews algorithms have been cleaned up to
204 provide more consistent results and a new form of type map that
205 can include document content is provided.</dd>
207 <dt><code class="module"><a href="./mod/mod_autoindex.html">mod_autoindex</a></code></dt>
209 <dd>Autoindex'ed directory listings can now be configured to
210 use HTML tables for cleaner formatting, and allow finer-grained
211 control of sorting, including version-sorting, and wildcard
212 filtering of the directory listing.</dd>
214 <dt><code class="module"><a href="./mod/mod_include.html">mod_include</a></code></dt>
216 <dd>New directives allow the default start and end tags for SSI elements
217 to be changed and allow for error and time format configuration
218 to take place in the main configuration file rather than in the
219 SSI document. Results from regular expression parsing and grouping
220 (now based on Perl's regular expression syntax) can be retrieved
221 using <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>'s variables <code>$0</code>
222 .. <code>$9</code>.</dd>
224 <dt><code class="module"><a href="./mod/mod_auth_dbm.html">mod_auth_dbm</a></code></dt>
226 <dd>Now supports multiple types of DBM-like databases using the
227 <code class="directive"><a href="./mod/mod_auth_dbm.html#authdbmtype">AuthDBMType</a></code>
232 <div class="bottomlang">
233 <p><span>Available Languages: </span><a href="./de/new_features_2_0.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
234 <a href="./en/new_features_2_0.html" title="English"> en </a> |
235 <a href="./fr/new_features_2_0.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
236 <a href="./ja/new_features_2_0.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
237 <a href="./ko/new_features_2_0.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
238 <a href="./pt-br/new_features_2_0.html" hreflang="pt-br" rel="alternate" title="Português (Brasil)"> pt-br </a> |
239 <a href="./ru/new_features_2_0.html" hreflang="ru" rel="alternate" title="Russian"> ru </a></p>
240 </div><div id="footer">
241 <p class="apache">Copyright 1995-2005 The Apache Software Foundation or its licensors, as applicable.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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