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<title>mod_charset_lite - Apache HTTP Server</title>
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<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>
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<p class="apache">Apache HTTP Server Version 2.2</p>
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<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 2.2</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_charset_lite</h1>
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<p><span>Available Languages: </span><a href="../en/mod/mod_charset_lite.html" title="English"> en </a> |
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<a href="../ko/mod/mod_charset_lite.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Specify character set translation or recoding</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>charset_lite_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_charset_lite.c</td></tr></table>
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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 class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></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 id="quickview"><h3 class="directives">Directives</h3>
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<li><img alt="" src="../images/down.gif" /> <a href="#charsetdefault">CharsetDefault</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#charsetoptions">CharsetOptions</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#charsetsourceenc">CharsetSourceEnc</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#problems">Common Problems</a></li>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<h2><a name="problems" id="problems">Common Problems</a></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
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<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a> on the system where
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<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> is deployed. These character
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set names are not standardized and are usually not the same as
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the corresponding values used in http headers. Currently, APR
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can only use iconv(3), so you can easily test your character set
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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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<h3>Mismatch between character set of content and translation
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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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<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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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CharsetDefault" id="CharsetDefault">CharsetDefault</a> <a name="charsetdefault" id="charsetdefault">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Charset to translate into</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetDefault <var>charset</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
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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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<p>The value of the <var>charset</var> argument must be accepted
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as a valid character set name by the character set support in
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<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a>. Generally, this means that it must be
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supported by 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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<span class="indent">
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CharsetSourceEnc UTF-16BE<br />
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CharsetDefault ISO-8859-1<br />
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CharsetOptions" id="CharsetOptions">CharsetOptions</a> <a name="charsetoptions" id="charsetoptions">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Configures charset translation behavior</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetOptions <var>option</var> [<var>option</var>] ...</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CharsetOptions DebugLevel=0 NoImplicitAdd</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
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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>. <var>Option</var> can
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<dt><code>DebugLevel=<var>n</var></code></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><code>ImplicitAdd | NoImplicitAdd</code></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 <code class="directive"><a href="../mod/mod_mime.html#addoutputfilter">AddOutputFilter</a></code> directive, <code>NoImplicitAdd</code>
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should be specified so that <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>
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doesn't add its filter.</dd>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CharsetSourceEnc" id="CharsetSourceEnc">CharsetSourceEnc</a> <a name="charsetsourceenc" id="charsetsourceenc">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Source charset of files</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetSourceEnc <var>charset</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
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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 <var>charset</var> argument must be accepted
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as a valid character set name by the character set support in
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<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a>. Generally, this means that it must be
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supported by 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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<span class="indent">
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CharsetSourceEnc UTF-16BE<br />
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CharsetDefault ISO-8859-1<br />
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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 class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_charset_lite.html" title="English"> en </a> |
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<a href="../ko/mod/mod_charset_lite.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</div><div id="footer">
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<p class="apache">Copyright 2006 The Apache Software Foundation.<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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