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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<title>mod_charset_lite - Apache HTTP Server Version 2.5</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/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 2.5</p>
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<img alt="" src="../images/feather.png" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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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 2.5</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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<div class="toplang">
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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="../fr/mod/mod_charset_lite.html" hreflang="fr" rel="alternate" title="Français"> fr </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>
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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>Extension</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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<h3>Summary</h3>
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<p><code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> allows the server to change
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the character set of responses before sending them to the client.
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In an EBCDIC environment, Apache always translates HTTP protocol
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content (e.g. response headers) from the code page of the Apache
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process locale to ISO-8859-1, but not the body of responses. In
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any environment, <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> can be used to
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specify that response bodies should be translated. For example,
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if files are stored in EBCDIC, then
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<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> can translate them to
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ISO-8859-1 before sending them to the client.</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>
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<div id="quickview"><h3>Topics</h3>
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<ul id="topics">
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<li><img alt="" src="../images/down.gif" /> <a href="#problems">Common Problems</a></li>
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</ul><h3 class="directives">Directives</h3>
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<ul id="toc">
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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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</ul>
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<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_charset_lite">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_charset_lite">Report a bug</a></li></ul><h3>See also</h3>
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<ul class="seealso">
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<li><a href="#comments_section">Comments</a></li></ul></div>
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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="section">
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<h2><a name="problems" id="problems">Common Problems</a> <a title="Permanent link" href="#problems" class="permalink">¶</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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</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>
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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> <a title="Permanent link" href="#charsetdefault" class="permalink">¶</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>Extension</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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</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 <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><pre class="prettyprint lang-config"><Directory "/export/home/trawick/apacheinst/htdocs/convert">
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CharsetSourceEnc UTF-16BE
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CharsetDefault ISO-8859-1
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</Directory></pre>
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</div>
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<div class="note">
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Specifying the same charset for both <code class="directive"><a href="#charsetsourceenc">CharsetSourceEnc</a></code>
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and <code class="directive">CharsetDefault</code> disables translation. The charset
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need not match the charset of the response, but it must be a valid charset on the system.
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</div>
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</div>
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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> <a title="Permanent link" href="#charsetoptions" class="permalink">¶</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 ImplicitAdd</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>Extension</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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</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>. <var>Option</var> can
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be one of</p>
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<dl>
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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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<dt><code>TranslateAllMimeTypes | NoTranslateAllMimeTypes</code></dt>
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<dd>Normally, <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> will only perform
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translation on a small subset of possible mimetypes. When the
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<code>TranslateAllMimeTypes</code> keyword is specified for a given
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configuration section, translation is performed without regard for
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mimetype.</dd>
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</dl>
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</div>
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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> <a title="Permanent link" href="#charsetsourceenc" class="permalink">¶</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>Extension</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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</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 <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><pre class="prettyprint lang-config"><Directory "/export/home/trawick/apacheinst/htdocs/convert">
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CharsetSourceEnc UTF-16BE
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CharsetDefault ISO-8859-1
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</Directory></pre>
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</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 class="note">
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Specifying the same charset for both <code class="directive">CharsetSourceEnc</code>
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and <code class="directive"><a href="#charsetdefault">CharsetDefault</a></code> disables translation. The charset
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need not match the charset of the response, but it must be a valid charset on the system.
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</div>
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</div>
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</div>
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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="../fr/mod/mod_charset_lite.html" hreflang="fr" rel="alternate" title="Français"> fr </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 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 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 Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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