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10 <title>Overview of new features in Apache HTTP Server 2.0 - Apache HTTP Server Version 2.5</title>
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20 <p class="apache">Apache HTTP Server Version 2.5</p>
21 <img alt="" src="./images/feather.png" /></div>
22 <div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div>
24 <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="./">Version 2.5</a></div><div id="page-content"><div id="preamble"><h1>Overview of new features in Apache HTTP Server 2.0</h1>
26 <p><span>Available Languages: </span><a href="./de/new_features_2_0.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
27 <a href="./en/new_features_2_0.html" title="English"> en </a> |
28 <a href="./fr/new_features_2_0.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
29 <a href="./ja/new_features_2_0.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
30 <a href="./ko/new_features_2_0.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
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32 <a href="./ru/new_features_2_0.html" hreflang="ru" rel="alternate" title="Russian"> ru </a> |
33 <a href="./tr/new_features_2_0.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
36 <p>This document describes some of the major changes between the
37 1.3 and 2.0 versions of the Apache HTTP Server.</p>
39 <div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#core">Core Enhancements</a></li>
40 <li><img alt="" src="./images/down.gif" /> <a href="#module">Module Enhancements</a></li>
41 </ul><h3>See also</h3><ul class="seealso"><li><a href="upgrading.html">Upgrading to 2.0 from 1.3</a></li><li><a href="#comments_section">Comments</a></li></ul></div>
42 <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
44 <h2><a name="core" id="core">Core Enhancements</a></h2>
48 <dt>Unix Threading</dt>
50 <dd>On Unix systems with POSIX threads support, Apache httpd can
51 now run in a hybrid multiprocess, multithreaded mode. This
52 improves scalability for many, but not all configurations.</dd>
54 <dt>New Build System</dt>
56 <dd>The build system has been rewritten from scratch to be
57 based on <code>autoconf</code> and <code>libtool</code>.
58 This makes Apache httpd's configuration system more similar to
59 that of other packages.</dd>
61 <dt>Multiprotocol Support</dt>
63 <dd>Apache HTTP Server now has some of the infrastructure in place to
64 support serving multiple protocols. <code class="module"><a href="./mod/mod_echo.html">mod_echo</a></code> has
65 been written as an example.</dd>
67 <dt>Better support for non-Unix
70 <dd>Apache HTTP Server 2.0 is faster and more stable on non-Unix
71 platforms such as BeOS, OS/2, and Windows. With the
72 introduction of platform-specific <a href="mpm.html">multi-processing modules</a> (MPMs) and the
73 Apache Portable Runtime (APR), these platforms are now
74 implemented in their native API, avoiding the often buggy and
75 poorly performing POSIX-emulation layers.</dd>
77 <dt>New Apache httpd API</dt>
79 <dd>The API for modules has changed significantly for 2.0.
80 Many of the module-ordering/-priority problems from 1.3 should
81 be gone. 2.0 does much of this automatically, and module ordering
82 is now done per-hook to allow more flexibility. Also, new calls
83 have been added that provide additional module capabilities
84 without patching the core Apache HTTP Server.</dd>
88 <dd>On systems where IPv6 is supported by the underlying
89 Apache Portable Runtime library, Apache httpd gets IPv6 listening
90 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
91 IPv6 numeric address strings (e.g., "<code>Listen
92 [2001:db8::1]:8080</code>").</dd>
96 <dd>Apache httpd modules may now be written as filters which act on
97 the stream of content as it is delivered to or from the
98 server. This allows, for example, the output of CGI scripts to
99 be parsed for Server Side Include directives using the
100 <code>INCLUDES</code> filter in <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>. The
101 module <code class="module"><a href="./mod/mod_ext_filter.html">mod_ext_filter</a></code> allows external programs to
102 act as filters in much the same way that CGI programs can act as
105 <dt>Multilanguage Error Responses</dt>
107 <dd>Error response messages to the browser are now provided in
108 several languages, using SSI documents. They may be customized
109 by the administrator to achieve a consistent look and feel.</dd>
111 <dt>Simplified configuration</dt>
113 <dd>Many confusing directives have been simplified. The often
114 confusing <code>Port</code> and <code>BindAddress</code> directives
115 are gone; only the <code class="directive"><a href="./mod/mpm_common.html#listen">Listen</a></code>
116 directive is used for IP address binding; the <code class="directive"><a href="./mod/core.html#servername">ServerName</a></code> directive specifies the
117 server name and port number only for redirection and vhost
120 <dt>Native Windows NT Unicode Support</dt>
122 <dd>Apache httpd 2.0 on Windows NT now uses utf-8 for all filename
123 encodings. These directly translate to the underlying Unicode
124 file system, providing multilanguage support for all Windows
125 NT-based installations, including Windows 2000 and Windows XP.
126 <em>This support does not extend to Windows 95, 98 or ME, which
127 continue to use the machine's local codepage for filesystem
130 <dt>Regular Expression Library Updated</dt>
132 <dd>Apache httpd 2.0 includes the <a href="http://www.pcre.org/">Perl
133 Compatible Regular Expression Library</a> (PCRE). All regular
134 expression evaluation now uses the more powerful Perl 5
138 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div>
139 <div class="section">
140 <h2><a name="module" id="module">Module Enhancements</a></h2>
144 <dt><code class="module"><a href="./mod/mod_ssl.html">mod_ssl</a></code></dt>
146 <dd>New module in Apache httpd 2.0. This module is an interface
147 to the SSL/TLS encryption protocols provided by
150 <dt><code class="module"><a href="./mod/mod_dav.html">mod_dav</a></code></dt>
152 <dd>New module in Apache httpd 2.0. This module implements the HTTP
153 Distributed Authoring and Versioning (DAV) specification for
154 posting and maintaining web content.</dd>
156 <dt><code class="module"><a href="./mod/mod_deflate.html">mod_deflate</a></code></dt>
158 <dd>New module in Apache httpd 2.0. This module allows supporting
159 browsers to request that content be compressed before delivery,
160 saving network bandwidth.</dd>
162 <dt><code class="module">mod_auth_ldap</code></dt>
164 <dd>New module in Apache httpd 2.0.41. This module allows an LDAP
165 database to be used to store credentials for HTTP Basic
166 Authentication. A companion module, <code class="module"><a href="./mod/mod_ldap.html">mod_ldap</a></code>
167 provides connection pooling and results caching.</dd>
169 <dt><code class="module"><a href="./mod/mod_auth_digest.html">mod_auth_digest</a></code></dt>
171 <dd>Includes additional support for session caching across
172 processes using shared memory.</dd>
174 <dt><code class="module"><a href="./mod/mod_charset_lite.html">mod_charset_lite</a></code></dt>
176 <dd>New module in Apache httpd 2.0. This experimental module allows
177 for character set translation or recoding.</dd>
179 <dt><code class="module"><a href="./mod/mod_file_cache.html">mod_file_cache</a></code></dt>
181 <dd>New module in Apache httpd 2.0. This module includes the
182 functionality of <code>mod_mmap_static</code> in Apache HTTP
183 Server version 1.3, plus adds further caching abilities.</dd>
185 <dt><code class="module"><a href="./mod/mod_headers.html">mod_headers</a></code></dt>
187 <dd>This module is much more flexible in Apache httpd 2.0. It can now
188 modify request headers used by <code class="module"><a href="./mod/mod_proxy.html">mod_proxy</a></code>, and
189 it can conditionally set response headers.</dd>
191 <dt><code class="module"><a href="./mod/mod_proxy.html">mod_proxy</a></code></dt>
193 <dd>The proxy module has been completely rewritten to take
194 advantage of the new filter infrastructure and to implement a
195 more reliable, HTTP/1.1 compliant proxy. In addition, new
196 <code class="directive"><a href="./mod/mod_proxy.html#proxy"><Proxy></a></code>
197 configuration sections provide more readable (and internally
198 faster) control of proxied sites; overloaded <code><Directory
199 "proxy:..."></code> configuration are not supported. The module
200 is now divided into specific protocol support modules including
201 <code>proxy_connect</code>, <code>proxy_ftp</code> and
202 <code>proxy_http</code>.</dd>
204 <dt><code class="module"><a href="./mod/mod_negotiation.html">mod_negotiation</a></code></dt>
206 <dd>A new <code class="directive"><a href="./mod/mod_negotiation.html#forcelanguagepriority">ForceLanguagePriority</a></code> directive can be used to assure that
207 the client receives a single document in all cases, rather than
208 NOT ACCEPTABLE or MULTIPLE CHOICES responses. In addition, the
209 negotiation and MultiViews algorithms have been cleaned up to
210 provide more consistent results and a new form of type map that
211 can include document content is provided.</dd>
213 <dt><code class="module"><a href="./mod/mod_autoindex.html">mod_autoindex</a></code></dt>
215 <dd>Autoindex'ed directory listings can now be configured to
216 use HTML tables for cleaner formatting, and allow finer-grained
217 control of sorting, including version-sorting, and wildcard
218 filtering of the directory listing.</dd>
220 <dt><code class="module"><a href="./mod/mod_include.html">mod_include</a></code></dt>
222 <dd>New directives allow the default start and end tags for SSI elements
223 to be changed and allow for error and time format configuration
224 to take place in the main configuration file rather than in the
225 SSI document. Results from regular expression parsing and grouping
226 (now based on Perl's regular expression syntax) can be retrieved
227 using <code class="module"><a href="./mod/mod_include.html">mod_include</a></code>'s variables <code>$0</code>
228 .. <code>$9</code>.</dd>
230 <dt><code class="module">mod_auth_dbm</code></dt>
232 <dd>Now supports multiple types of DBM-like databases using the
233 <code class="directive">AuthDBMType</code> directive.</dd>
237 <div class="bottomlang">
238 <p><span>Available Languages: </span><a href="./de/new_features_2_0.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> |
239 <a href="./en/new_features_2_0.html" title="English"> en </a> |
240 <a href="./fr/new_features_2_0.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
241 <a href="./ja/new_features_2_0.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
242 <a href="./ko/new_features_2_0.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
243 <a href="./pt-br/new_features_2_0.html" hreflang="pt-br" rel="alternate" title="Português (Brasil)"> pt-br </a> |
244 <a href="./ru/new_features_2_0.html" hreflang="ru" rel="alternate" title="Russian"> ru </a> |
245 <a href="./tr/new_features_2_0.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
246 </div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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