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<p class="apache">Apache HTTP Server Version 2.2</p>
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<div class="retired"><h4>Please note</h4>
<p> This document refers to a legacy release (<strong>2.2</strong>) of Apache httpd. The active release (<strong>2.4</strong>) is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
<p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_charset_lite.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_charset_lite</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_charset_lite.html" title="English"> en </a> |
<a href="../ko/mod/mod_charset_lite.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Specify character set translation or recoding</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>charset_lite_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_charset_lite.c</td></tr></table>
<h3>Summary</h3>
<p><code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> allows the server to change
the character set of responses before sending them to the client.
In an EBCDIC environment, Apache always translates HTTP protocol
content (e.g. response headers) from the code page of the Apache
process locale to ISO-8859-1, but not the body of responses. In
any environment, <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> can be used to
specify that response bodies should be translated. For example,
if files are stored in EBCDIC, then
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> can translate them to
ISO-8859-1 before sending them to the client.</p>
<p>This module provides a small subset of configuration
mechanisms implemented by Russian Apache and its associated
<code>mod_charset</code>.</p>
</div>
<div id="quickview"><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#problems">Common Problems</a></li>
</ul><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>
<ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="problems" id="problems">Common Problems</a></h2>
<h3>Invalid character set names</h3>
<p>The character set name parameters of <code class="directive"><a href="#charsetsourceenc">CharsetSourceEnc</a></code> and
<code class="directive"><a href="#charsetdefault">CharsetDefault</a></code>
must be acceptable to the translation mechanism used by
<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a> on the system where
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> is deployed. These character
set names are not standardized and are usually not the same as
the corresponding values used in http headers. Currently, APR
can only use iconv(3), so you can easily test your character set
names using the iconv(1) program, as follows:</p>
<div class="example"><p><code>
iconv -f charsetsourceenc-value -t charsetdefault-value
</code></p></div>
<h3>Mismatch between character set of content and translation
rules</h3>
<p>If the translation rules don't make sense for the content,
translation can fail in various ways, including:</p>
<ul>
<li>The translation mechanism may return a bad return code,
and the connection will be aborted.</li>
<li>The translation mechanism may silently place special
characters (e.g., question marks) in the output buffer when
it cannot translate the input buffer.</li>
</ul>
</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:</a></th><td>Charset to translate into</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetDefault <var>charset</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
</table>
<p>The <code class="directive">CharsetDefault</code> directive specifies the
charset that content in the associated container should be
translated to.</p>
<p>The value of the <var>charset</var> argument must be accepted
as a valid character set name by the character set support in
<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a>. Generally, this means that it must be
supported by iconv.</p>
<div class="example"><h3>Example</h3><p><code>
<Directory /export/home/trawick/apacheinst/htdocs/convert><br />
<span class="indent">
CharsetSourceEnc UTF-16BE<br />
CharsetDefault ISO-8859-1<br />
</span>
</Directory>
</code></p></div>
</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:</a></th><td>Configures charset translation behavior</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetOptions <var>option</var> [<var>option</var>] ...</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CharsetOptions DebugLevel=0 NoImplicitAdd</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
</table>
<p>The <code class="directive">CharsetOptions</code> directive configures certain
behaviors of <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. <var>Option</var> can
be one of</p>
<dl>
<dt><code>DebugLevel=<var>n</var></code></dt>
<dd>The <code>DebugLevel</code> keyword allows you to specify
the level of debug messages generated by
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>. By default, no messages are
generated. This is equivalent to <code>DebugLevel=0</code>.
With higher numbers, more debug messages are generated, and
server performance will be degraded. The actual meanings of
the numeric values are described with the definitions of the
DBGLVL_ constants near the beginning of
<code>mod_charset_lite.c</code>.</dd>
<dt><code>ImplicitAdd | NoImplicitAdd</code></dt>
<dd>The <code>ImplicitAdd</code> keyword specifies that
<code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> should implicitly insert its
filter when the configuration specifies that the character
set of content should be translated. If the filter chain is
explicitly configured using the <code class="directive"><a href="../mod/mod_mime.html#addoutputfilter">AddOutputFilter</a></code> directive, <code>NoImplicitAdd</code>
should be specified so that <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code>
doesn't add its filter.</dd>
<dt><code>TranslateAllMimeTypes | NoTranslateAllMimeTypes</code></dt>
<dd>Normally, <code class="module"><a href="../mod/mod_charset_lite.html">mod_charset_lite</a></code> will only perform
translation on a small subset of possible mimetypes. When the
<code>TranslateAllMimeTypes</code> keyword is specified for a given
configuration section, translation is performed without regard for
mimetype.</dd>
</dl>
</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:</a></th><td>Source charset of files</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CharsetSourceEnc <var>charset</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_charset_lite</td></tr>
</table>
<p>The <code class="directive">CharsetSourceEnc</code> directive specifies the
source charset of files in the associated container.</p>
<p>The value of the <var>charset</var> argument must be accepted
as a valid character set name by the character set support in
<a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a>. Generally, this means that it must be
supported by iconv.</p>
<div class="example"><h3>Example</h3><p><code>
<Directory /export/home/trawick/apacheinst/htdocs/convert><br />
<span class="indent">
CharsetSourceEnc UTF-16BE<br />
CharsetDefault ISO-8859-1<br />
</span>
</Directory>
</code></p></div>
<p>The character set names in this example work with the iconv
translation support in Solaris 8.</p>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_charset_lite.html" title="English"> en </a> |
<a href="../ko/mod/mod_charset_lite.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
</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 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 <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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