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--><title>mod_charset_lite - Apache HTTP Server</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 href="../images/favicon.ico" rel="shortcut icon" /></head><body><div id="page-header"><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></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-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module mod_charset_lite</h1><table class="module"><tr><th><a href="module-dict.html#Description">Description:
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</a></th><td>Specify character set translation or recoding</td></tr><tr><th><a href="module-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:
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</a></th><td>charset_lite_module</td></tr><tr><th><a href="module-dict.html#SourceFile">Source File:
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</a></th><td>mod_charset_lite.c</td></tr></table><h3>Summary</h3>
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<p>This is an <strong>experimental</strong> module and should
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be used with care. Experiment with your
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<code>mod_charset_lite</code> configuration to ensure that it
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performs the desired function.</p>
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<p><code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> allows the administrator to
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specify the source character set of objects as well as the
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character set they should be translated into before sending to the
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client. <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> does not translate the
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data itself but instead tells Apache what translation to
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perform. <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> is applicable to EBCDIC
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and ASCII host environments. In an EBCDIC environment, Apache
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normally translates text content from the code page of the Apache
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process locale to ISO-8859-1. <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>
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can be used to specify that a different translation is to be
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performed. In an ASCII environment, Apache normally performs no
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translation, so <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> is needed in
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order for any translation to take place.</p>
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<p>This module provides a small subset of configuration
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mechanisms implemented by Russian Apache and its associated
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<code>mod_charset</code>.</p>
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</div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#charsetdefault">CharsetDefault</a></li><li><img alt="" src="../images/down.gif" /> <a href="#charsetoptions">CharsetOptions</a></li><li><img alt="" src="../images/down.gif" /> <a href="#charsetsourceenc">CharsetSourceEnc</a></li></ul><h3>Topics</h3><ul id="topics"><li><img alt="" src="../images/down.gif" /> Common Problems</li></ul></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="section"><h2>Common Problems</h2>
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<h3>Invalid character set names</h3>
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<p>The character set name parameters of <code class="directive"><a href="#charsetsourceenc">CharsetSourceEnc</a></code> and
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<code class="directive"><a href="#charsetdefault">CharsetDefault</a></code>
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must be acceptable to the translation mechanism used by APR on the
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system where <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> is deployed. These
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character set names are not standardized and are usually not the
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same as the corresponding values used in http headers. Currently,
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APR can only use iconv(3), so you can easily test your character
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set names using the iconv(1) program, as follows:</p>
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<div class="example"><p><code>
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iconv -f charsetsourceenc-value -t charsetdefault-value
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</code></p></div>
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<h3>Mismatch between character set of content and translation
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rules</h3>
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<p>If the translation rules don't make sense for the content,
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translation can fail in various ways, including:</p>
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<ul>
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<li>The translation mechanism may return a bad return code,
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and the connection will be aborted.</li>
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<li>The translation mechanism may silently place special
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characters (e.g., question marks) in the output buffer when
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it cannot translate the input buffer.</li>
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</ul>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="CharsetDefault" id="CharsetDefault">CharsetDefault</a> <a name="charsetdefault" id="charsetdefault">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Charset to translate into</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td>CharsetDefault <em>charset</em></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>server config, virtual host, directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>FileInfo</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_charset_lite</td></tr></table>
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<p>The <code class="directive">CharsetDefault</code> directive specifies the
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charset that content in the associated container should be
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translated to.</p>
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<p>The value of the <em>charset</em> argument must be accepted
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as a valid character set name by the character set support in
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APR. Generally, this means that it must be supported by
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iconv.</p>
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<div class="example"><h3>Example</h3><p><code>
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<Directory "/export/home/trawick/apacheinst/htdocs/convert"><br />
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CharsetSourceEnc UTF-16BE<br />
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CharsetDefault ISO-8859-1<br />
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</Directory>
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</code></p></div>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="CharsetOptions" id="CharsetOptions">CharsetOptions</a> <a name="charsetoptions" id="charsetoptions">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Configures charset tranlation behavior</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td>CharsetOptions <em>option</em> [<em>option</em>] ...</td></tr><tr><th><a href="directive-dict.html#Default">Default:
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</a></th><td><code>CharsetOptions DebugLevel=0
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NoImplicitAdd</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>server config, virtual host, directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>FileInfo</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_charset_lite</td></tr></table>
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<p>The <code class="directive">CharsetOptions</code> directive configures certain
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behaviors of <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. <em>Option</em> can
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be one of</p>
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<dl>
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<dt>DebugLevel=<em>n</em></dt>
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<dd>The <code>DebugLevel</code> keyword allows you to specify
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the level of debug messages generated by
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<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. By default, no messages are
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generated. This is equivalent to <code>DebugLevel=0</code>.
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With higher numbers, more debug messages are generated, and
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server performance will be degraded. The actual meanings of
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the numeric values are described with the definitions of the
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DBGLVL_ constants near the beginning of
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<code>mod_charset_lite.c</code>.</dd>
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<dt>ImplicitAdd | NoImplicitAdd</dt>
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<dd>The <code>ImplicitAdd</code> keyword specifies that
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<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> should implicitly insert its
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filter when the configuration specifies that the character
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set of content should be translated. If the filter chain is
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explicitly configured using the AddOutputFilter directive,
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<code>NoImplicitAdd</code> should be specified so that
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<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> doesn't add its filter.</dd>
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</dl>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="CharsetSourceEnc" id="CharsetSourceEnc">CharsetSourceEnc</a> <a name="charsetsourceenc" id="charsetsourceenc">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Source charset of files</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td>CharsetSourceEnc <em>charset</em></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>server config, virtual host, directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>FileInfo</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_charset_lite</td></tr></table>
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<p>The <code class="directive">CharsetSourceEnc</code> directive specifies the
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source charset of files in the associated container.</p>
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<p>The value of the <em>charset</em> argument must be accepted
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as a valid character set name by the character set support in
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APR. Generally, this means that it must be supported by
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iconv.</p>
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<div class="example"><h3>Example</h3><p><code>
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<Directory "/export/home/trawick/apacheinst/htdocs/convert"><br />
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CharsetSourceEnc UTF-16BE<br />
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CharsetDefault ISO-8859-1<br />
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</Directory>
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</code></p></div>
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<p>The character set names in this example work with the iconv
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translation support in Solaris 8.</p>
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</div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</a></p><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div></body></html> |