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<div id="preamble"><h1>Apache Module mod_sed</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_sed.html" title="English">&nbsp;en&nbsp;</a> |
<a href="../fr/mod/mod_sed.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Filter Input (request) and Output (response) content using <code>sed</code> syntax</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>sed_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_sed.c sed0.c sed1.c regexp.c regexp.h sed.h</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
<h3>Summary</h3>

<p>
<code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> is an in-process content filter. The <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> filter implements the <code>sed</code> editing
commands implemented by the Solaris 10 <code>sed</code>
program as described in the <a href="http://www.gnu.org/software/sed/manual/sed.txt">manual
page</a>. However, unlike <code>sed</code>, <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> doesn't take data from
standard
input. Instead, the filter acts on the entity data sent between client and
server. <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> can be used as an input or output filter. <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> is a
content filter, which means that it cannot be used to modify client or
server http headers.
</p>
<p>
The <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> output filter accepts a chunk of data, executes the <code>sed</code> scripts on the data, and generates the output which is passed to the next filter in the chain.
</p>

<p>
The <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code> input filter reads the data from the next filter in the chain, executes the <code>sed</code> scripts, and returns the generated data to the caller filter in the filter chain.
</p>

<p>
Both the input and output filters only process the data if newline characters are seen in the content. At the end of the data, the rest of the data is treated as the last line.
</p>

<p>A tutorial article on <code class="module"><a href="../mod/mod_sed.html">mod_sed</a></code>, and why it is more powerful than simple
string or regular expression search and replace, is available <a href="https://blogs.oracle.com/basant/entry/using_mod_sed_to_filter">on
the author's blog</a>.</p>

</div>
<div id="quickview"><h3>Topics</h3>
<ul id="topics">
<li><img alt="" src="../images/down.gif" /> <a href="#sampleconf">Sample Configuration</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#sed_commands">Sed Commands</a></li>
</ul><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#inputsed">InputSed</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#outputsed">OutputSed</a></li>
</ul>
<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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_sed">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_sed">Report a bug</a></li></ul><h3>See also</h3>
<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="sampleconf" id="sampleconf">Sample Configuration</a></h2>
    <div class="example"><h3>Adding an output filter </h3><pre class="prettyprint lang-config"># In the following example, the sed filter will change the string
# "monday" to "MON" and the string "sunday" to SUN in html documents
# before sending to the client.
&lt;Directory "/var/www/docs/sed"&gt; 
    AddOutputFilter Sed html 
    OutputSed "s/monday/MON/g" 
    OutputSed "s/sunday/SUN/g" 
&lt;/Directory&gt;</pre>
</div>

    <div class="example"><h3>Adding an input filter </h3><pre class="prettyprint lang-config"># In the following example, the sed filter will change the string
# "monday" to "MON" and the string "sunday" to SUN in the POST data
# sent to PHP.
&lt;Directory "/var/www/docs/sed"&gt; 
    AddInputFilter Sed php 
    InputSed "s/monday/MON/g" 
    InputSed "s/sunday/SUN/g" 
&lt;/Directory&gt;</pre>
</div>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="sed_commands" id="sed_commands">Sed Commands</a></h2>
    <p>
    Complete details of the <code>sed</code> command can be found from the
   <a href="http://www.gnu.org/software/sed/manual/sed.txt">sed manual
page</a>.
    </p>
    <dl>
        <dt><code>b</code></dt>
        <dd>Branch to the label specified (similar to goto).</dd>
        <dt><code>h</code></dt>
        <dd>Copy the current line to the hold buffer.</dd>
        <dt><code>H</code></dt>
        <dd>Append the current line to the hold buffer.</dd>
        <dt><code>g</code></dt>
        <dd>Copy the hold buffer to the current line.</dd>
        <dt><code>G</code></dt>
        <dd>Append the hold buffer to the current line.</dd>
        <dt><code>x</code></dt>
        <dd>Swap the contents of the hold buffer and the current line.</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="InputSed" id="InputSed">InputSed</a> <a name="inputsed" id="inputsed">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sed command to filter request data (typically <code>POST</code> data)</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>InputSed <var>sed-command</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_sed</td></tr>
</table>
    <p>The <code class="directive">InputSed</code> directive specifies the <code>sed</code> command
    to execute on the request data e.g., <code>POST</code> data.
    </p>

</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="OutputSed" id="OutputSed">OutputSed</a> <a name="outputsed" id="outputsed">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sed command for filtering response content</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>OutputSed <var>sed-command</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_sed</td></tr>
</table>
    <p>The <code class="directive">OutputSed</code> directive specifies the <code>sed</code>
    command to execute on the response.
    </p>

</div>
</div>
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<a href="../fr/mod/mod_sed.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
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