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<title>Overview of new features in Apache HTTP Server 2.0 - Apache HTTP Server Version 2.4</title>
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<body id="manual-page">
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Modules | Directives | FAQ | Glossary | Sitemap
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Apache HTTP Server Version 2.4
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<-
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Apache > HTTP Server > Documentation > Version 2.4
Overview of new features in Apache HTTP Server 2.0
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Available Languages:  de  |
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 en  |
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 fr  |
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 ja  |
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 ko  |
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This document describes some of the major changes between the
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     1.3 and 2.0 versions of the Apache HTTP Server.
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  •  Module Enhancements
    		•
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    See also
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    top
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    Core Enhancements
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    Unix Threading
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    On Unix systems with POSIX threads support, Apache httpd can
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          now run in a hybrid multiprocess, multithreaded mode. This
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          improves scalability for many, but not all configurations.
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    New Build System
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    The build system has been rewritten from scratch to be
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          based on autoconf and libtool.
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          This makes Apache httpd's configuration system more similar to
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          that of other packages.
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    Multiprotocol Support
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    Apache HTTP Server now has some of the infrastructure in place to
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          support serving multiple protocols. mod_echo has
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          been written as an example.
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    Better support for non-Unix
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          platforms
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    Apache HTTP Server 2.0 is faster and more stable on non-Unix
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          platforms such as BeOS, OS/2, and Windows. With the
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          introduction of platform-specific multi-processing modules (MPMs) and the
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          Apache Portable Runtime (APR), these platforms are now
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          implemented in their native API, avoiding the often buggy and
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          poorly performing POSIX-emulation layers.
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    New Apache httpd API
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    The API for modules has changed significantly for 2.0.
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          Many of the module-ordering/-priority problems from 1.3 should
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          be gone. 2.0 does much of this automatically, and module ordering
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          is now done per-hook to allow more flexibility. Also, new calls
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          have been added that provide additional module capabilities
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          without patching the core Apache HTTP Server.
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    IPv6 Support
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    On systems where IPv6 is supported by the underlying
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          Apache Portable Runtime library, Apache httpd gets IPv6 listening
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          sockets by default. Additionally, the Listen, NameVirtualHost, and VirtualHost directives support
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          IPv6 numeric address strings (e.g., "Listen
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          [2001:db8::1]:8080").
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    Filtering
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    Apache httpd modules may now be written as filters which act on
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          the stream of content as it is delivered to or from the
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          server. This allows, for example, the output of CGI scripts to
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          be parsed for Server Side Include directives using the
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          INCLUDES filter in mod_include. The
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          module mod_ext_filter allows external programs to
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          act as filters in much the same way that CGI programs can act as
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          handlers.
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    Multilanguage Error Responses
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    Error response messages to the browser are now provided in
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          several languages, using SSI documents. They may be customized
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          by the administrator to achieve a consistent look and feel.
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    Simplified configuration
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    Many confusing directives have been simplified. The often
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          confusing Port and BindAddress directives
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          are gone; only the Listen
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          directive is used for IP address binding; the ServerName directive specifies the
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          server name and port number only for redirection and vhost
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          recognition.
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    Native Windows NT Unicode Support
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    Apache httpd 2.0 on Windows NT now uses utf-8 for all filename
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          encodings. These directly translate to the underlying Unicode
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          file system, providing multilanguage support for all Windows
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          NT-based installations, including Windows 2000 and Windows XP.
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          This support does not extend to Windows 95, 98 or ME, which
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          continue to use the machine's local codepage for filesystem
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          access.
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    Regular Expression Library Updated
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    Apache httpd 2.0 includes the Perl
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          Compatible Regular Expression Library (PCRE).  All regular
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          expression evaluation now uses the more powerful Perl 5
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          syntax.
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    top
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    Module Enhancements
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    mod_ssl
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    New module in Apache httpd 2.0. This module is an interface
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          to the SSL/TLS encryption protocols provided by
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          OpenSSL.
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    mod_dav
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    New module in Apache httpd 2.0. This module implements the HTTP
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          Distributed Authoring and Versioning (DAV) specification for
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          posting and maintaining web content.
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    mod_deflate
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    New module in Apache httpd 2.0.  This module allows supporting
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          browsers to request that content be compressed before delivery,
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          saving network bandwidth.
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    mod_auth_ldap
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    New module in Apache httpd 2.0.41.  This module allows an LDAP
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          database to be used to store credentials for HTTP Basic
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          Authentication.  A companion module, mod_ldap
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          provides connection pooling and results caching.
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    mod_auth_digest
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    Includes additional support for session caching across
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          processes using shared memory.
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    mod_charset_lite
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    New module in Apache httpd 2.0. This experimental module allows
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          for character set translation or recoding.
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    mod_file_cache
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    New module in Apache httpd 2.0. This module includes the
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          functionality of mod_mmap_static in Apache HTTP
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          Server version 1.3, plus adds further caching abilities.
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    mod_headers
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    This module is much more flexible in Apache httpd 2.0. It can now
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          modify request headers used by mod_proxy, and
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          it can conditionally set response headers.
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    mod_proxy
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    The proxy module has been completely rewritten to take
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          advantage of the new filter infrastructure and to implement a
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          more reliable, HTTP/1.1 compliant proxy. In addition, new
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          <Proxy>
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          configuration sections provide more readable (and internally
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          faster) control of proxied sites; overloaded <Directory
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          "proxy:..."> configuration are not supported. The module
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          is now divided into specific protocol support modules including
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          proxy_connect, proxy_ftp and
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          proxy_http.
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    mod_negotiation
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    A new ForceLanguagePriority directive can be used to assure that
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          the client receives a single document in all cases, rather than
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          NOT ACCEPTABLE or MULTIPLE CHOICES responses. In addition, the
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          negotiation and MultiViews algorithms have been cleaned up to
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          provide more consistent results and a new form of type map that
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          can include document content is provided.
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    mod_autoindex
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    Autoindex'ed directory listings can now be configured to
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          use HTML tables for cleaner formatting, and allow finer-grained
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          control of sorting, including version-sorting, and wildcard
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          filtering of the directory listing.
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    mod_include
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    New directives allow the default start and end tags for SSI elements
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          to be changed and allow for error and time format configuration
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          to take place in the main configuration file rather than in the
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          SSI document. Results from regular expression parsing and grouping
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          (now based on Perl's regular expression syntax) can be retrieved
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          using mod_include's variables $0
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          .. $9.
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    mod_auth_dbm
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    Now supports multiple types of DBM-like databases using the
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          AuthDBMType directive.
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    Available Languages:  de  |
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     en  |
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     fr  |
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     ja  |
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     ko  |
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     pt-br  |
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     ru  |
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    top
    Comments
    Notice:
    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 mailing lists.
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