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| <h1 align="CENTER">Overview of New Features in Apache 2.0</h1> |
| |
| <p>Enhancements: <a href="#core">Core</a> | <a |
| href="#module">Module</a></p> |
| <hr /> |
| |
| <h2><a id="core" name="core">Core Enhancements:</a></h2> |
| |
| <dl> |
| <dt><strong>Unix Threading</strong></dt> |
| |
| <dd>On Unix systems with POSIX threads support, Apache can |
| now run in a hybrid multiprocess, multithreaded mode. This |
| improves scalability for many, but not all configurations.</dd> |
| |
| <dt><strong>New Build System</strong></dt> |
| |
| <dd>The build system has been rewritten from scratch to be |
| based on autoconf and libtool. This makes Apache's |
| configuration system more similar to that of other |
| packages.</dd> |
| |
| <dt><strong>Multiprotocol Support</strong></dt> |
| |
| <dd>Apache now has some of the infrastructure in place to |
| support serving multiple protocols. mod_echo has been written |
| as an example.</dd> |
| |
| <dt><strong>Better support for non-Unix |
| platforms</strong></dt> |
| |
| <dd>Apache 2.0 is faster and more stable on non-Unix |
| platforms such as BeOS, OS/2, and Windows. With the |
| introduction of platform-specific <a |
| href="mpm.html">multi-processing modules</a> (MPMs) and the |
| Apache Portable Runtime (APR), these platforms are now |
| implemented in their native API, avoiding the often buggy and |
| poorly performing POSIX-emulation layers.</dd> |
| |
| <dt><strong>New Apache API</strong></dt> |
| |
| <dd>The API for modules has changed significantly for 2.0. |
| Many of the module-ordering/-priority problems from 1.3 should |
| be gone. 2.0 does much of this automatically, and module ordering |
| is now done per-hook to allow more flexibility. Also, new calls |
| have been added that provide additional module capabilities |
| without patching the core Apache server.</dd> |
| |
| <dt><strong>IPv6 Support</strong></dt> |
| |
| <dd>On systems where IPv6 is supported by the underlying |
| Apache Portable Runtime library, Apache gets IPv6 listening |
| sockets by default. Additionally, the Listen, |
| NameVirtualHost, and <VirtualHost> directives support |
| IPv6 numeric address strings (e.g., "Listen |
| [fe80::1]:8080").</dd> |
| |
| <dt><strong>Filtering</strong></dt> |
| |
| <dd>Apache modules may now be written as filters which act on |
| the stream of content as it is delivered to or from the |
| server. This allows, for example, the output of CGI scripts |
| to be parsed for Server Side Include directives using the |
| INCLUDES filter in mod_include.</dd> |
| |
| <dt><strong>Multilanguage Error Responses</strong></dt> |
| |
| <dd>Error response messages to the browser are now provided in |
| several languages, using SSI documents. They may be customized |
| by the administrator to achieve a consistent look and feel.</dd> |
| |
| <dt><strong>Simplified configuration</strong></dt> |
| |
| <dd>Many confusing directives have been simplified. The often |
| confusing Port and BindAddress directives are gone; only the |
| Listen directive is used for IP address binding; the |
| ServerName directive specifies the server name and port number |
| only for redirection and vhost recognition.</dd> |
| |
| <dt><strong>Native Windows NT Unicode Support</strong></dt> |
| |
| <dd>Apache 2.0 on Windows NT now uses utf-8 for all filename |
| encodings. These directly translate to the underlying Unicode |
| file system, providing multilanguage support for all Windows |
| NT-based installations, including Windows 2000 and Windows XP. |
| <em>This support does not extend to Windows 95, 98 or ME, which |
| continue to use the machine's local codepage for filesystem |
| access.</em></dd> |
| |
| </dl> |
| <hr /> |
| |
| <h2><a id="module" name="module">Module Enhancements:</a></h2> |
| |
| <dl> |
| <dt><strong>mod_ssl</strong></dt> |
| |
| <dd>New module in Apache 2.0. This module is an interface |
| to the SSL/TLS encryption protocols provided by |
| OpenSSL.</dd> |
| |
| <dt><strong>mod_dav</strong></dt> |
| |
| <dd>New module in Apache 2.0. This module implements the HTTP |
| Distributed Authoring and Versioning (DAV) specification for |
| posting and maintaining web content.</dd> |
| |
| <dt><strong>mod_auth_digest</strong></dt> |
| |
| <dd>Includes additional support for session caching across |
| processes using shared memory.</dd> |
| |
| <dt><strong>mod_charset_lite</strong></dt> |
| |
| <dd>New module in Apache 2.0. This experimental module allows |
| for character set translation or recoding.</dd> |
| |
| <dt><strong>mod_file_cache</strong></dt> |
| |
| <dd>New module in Apache 2.0. This module includes the |
| functionality of mod_mmap_static in Apache 1.3, plus adds |
| further caching abilities.</dd> |
| |
| <dt><strong>mod_headers</strong></dt> |
| |
| <dd>This module is much more flexible in Apache 2.0. It can |
| now modify request headers used by mod_proxy, and it can |
| conditionally set response headers.</dd> |
| |
| <dt><strong>mod_proxy</strong></dt> |
| |
| <dd>The proxy module has been completely rewritten to take advantage |
| of the new filter infrastructure and to implement a more |
| reliable, HTTP/1.1 compliant proxy. In addition, new |
| <Proxy> configuration sections provide more readable |
| (and internally faster) control of proxied sites; overloaded |
| <Directory "proxy:..."> configuration are not supported. The |
| module is now divided into specific protocol support modules |
| including proxy_connect, proxy_ftp and proxy_http.</dd> |
| |
| <dt><strong>mod_negotiation</strong></dt> |
| |
| <dd>A new <a |
| href="mod/mod_negotiation.html#forcelanguagepriority" |
| >ForceLanguagePriority</a> |
| directive can be used to assure that the client receives a |
| single document in all cases, rather than NOT ACCEPTABLE or |
| MULTIPLE CHOICES responses. In addition, the negotiation and MultiViews |
| algorithms have been cleaned up to provide more consistent |
| results and a new form of type map that can include document |
| content is provided.</dd> |
| |
| <dt><strong>mod_autoindex</strong></dt> |
| |
| <dd>Autoindex'ed directory listings can now be configured to |
| use HTML tables for cleaner formatting, and allow finer-grained |
| control of sorting, including version-sorting, and wildcard |
| filtering of the directory listing.</dd> |
| |
| <dt><strong>mod_include</strong></dt> |
| |
| <dd>New directives allow the default start and end tags for SSI elements |
| to be changed and allow for error and time format configuration |
| to take place in the main configuration file rather than in the |
| SSI document. Results from regular expression parsing and grouping |
| (now based on Perl's regular expression syntax) can be retrieved |
| using mod_include's variables $0 .. $9.</dd> |
| |
| <dt><strong>mod_auth_dbm</strong></dt> |
| |
| <dd>Now supports multiple types of DBM-like databases using the |
| <a |
| href="mod/mod_auth_dbm.html#authdbmtype">AuthDBMType</a> |
| directive.</dd> |
| |
| <dt><strong>mod_auth_db</strong></dt> |
| |
| <dd>Has been removed in favor of mod_auth_dbm with the AuthDBMType |
| directive.</dd> |
| |
| |
| </dl> |
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