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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:01:30 +0000 |
| commit | 6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch) | |
| tree | 1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_substitute.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip | |
Adding upstream version 2.4.57.upstream/2.4.57upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/mod/mod_substitute.html.en')
| -rw-r--r-- | docs/manual/mod/mod_substitute.html.en | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_substitute.html.en b/docs/manual/mod/mod_substitute.html.en new file mode 100644 index 0000000..db1aef3 --- /dev/null +++ b/docs/manual/mod/mod_substitute.html.en @@ -0,0 +1,224 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_substitute - Apache HTTP Server Version 2.4</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 rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<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="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="../images/feather.png" /></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/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_substitute</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_substitute.html" title="English"> en </a> | +<a href="../fr/mod/mod_substitute.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Perform search and replace operations on response bodies</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>substitute_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_substitute.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache HTTP Server 2.2.7 and later</td></tr></table> +<h3>Summary</h3> + + <p><code class="module"><a href="../mod/mod_substitute.html">mod_substitute</a></code> provides a mechanism to perform + both regular expression and fixed string substitutions on + response bodies.</p> +</div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#substitute">Substitute</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#substituteinheritbefore">SubstituteInheritBefore</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#substitutemaxlinelength">SubstituteMaxLineLength</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__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_substitute">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_substitute">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="directive-section"><h2><a name="Substitute" id="Substitute">Substitute</a> <a name="substitute" id="substitute">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Pattern to filter the response content</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Substitute <var>s/pattern/substitution/[infq]</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#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_substitute</td></tr> +</table> + <p>The <code class="directive">Substitute</code> directive specifies a + search and replace pattern to apply to the response body.</p> + + <p>The meaning of the pattern can be modified by using any + combination of these flags:</p> + + <dl> + <dt><code>i</code></dt> + <dd>Perform a case-insensitive match.</dd> + <dt><code>n</code></dt> + <dd>By default the pattern is treated as a regular expression. + Using the <code>n</code> flag forces the pattern to be treated + as a fixed string.</dd> + <dt><code>f</code></dt> + <dd>The <code>f</code> flag causes <code>mod_substitute</code> to flatten the + result of a substitution allowing for later substitutions to + take place on the boundary of this one. This is the default.</dd> + <dt><code>q</code></dt> + <dd>The <code>q</code> flag causes <code>mod_substitute</code> to not + flatten the buckets after each substitution. This can + result in much faster response and a decrease in memory + utilization, but should only be used if there is no possibility + that the result of one substitution will ever match a pattern + or regex of a subsequent one.</dd> + </dl> + + <p>The <var>substitution</var> may contain literal text and regular + expression backreferences</p> + + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><Location "/"> + AddOutputFilterByType SUBSTITUTE text/html + Substitute "s/foo/bar/ni" +</Location></pre> +</div> + + <p>The character which is used to separate (or "delimit") the + various parts of the substitution string is referred to as the + "delimiter", and it is most common to use a slash for this + purpose.</p> + + <p>If either the pattern or the substitution contain a slash + character then an alternative delimiter may be used to make the + directive more readable:</p> + + <div class="example"><h3>Example of using an alternate delimiter</h3><pre class="prettyprint lang-config"><Location "/"> + AddOutputFilterByType SUBSTITUTE text/html + Substitute "s|<BR */?>|<br />|i" +</Location></pre> +</div> + + <p>Backreferences can be used in the comparison and in the substitution, + when regular expressions are used, as illustrated in the following example: </p> + <div class="example"><h3>Example of using backreferences and captures</h3><pre class="prettyprint lang-config"><Location "/"> + AddOutputFilterByType SUBSTITUTE text/html + # "foo=k,bar=k" -> "foo/bar=k" + Substitute "s|foo=(\w+),bar=\1|foo/bar=$1|" +</Location></pre> +</div> + + <p>A common use scenario for <code>mod_substitute</code> is the + situation in which a front-end server proxies requests to a back-end + server which returns HTML with hard-coded embedded URLs that refer + to the back-end server. These URLs don't work for the end-user, + since the back-end server is unreachable.</p> + + <p>In this case, <code>mod_substitute</code> can be used to rewrite + those URLs into something that will work from the front end:</p> + + <div class="example"><h3>Rewriting URLs embedded in proxied content</h3><pre class="prettyprint lang-config">ProxyPass "/blog/" "http://internal.blog.example.com/" +ProxyPassReverse "/blog/" "http://internal.blog.example.com/" + +Substitute "s|http://internal.blog.example.com/|http://www.example.com/blog/|i"</pre> +</div> + + <p><code class="directive"><a href="../mod/mod_proxy.html#proxypassreverse">ProxyPassReverse</a></code> + modifies any <code>Location</code> (redirect) headers that are sent + by the back-end server, and, in this example, + <code class="directive">Substitute</code> takes care of the rest of the problem by + fixing up the HTML response as well.</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="SubstituteInheritBefore" id="SubstituteInheritBefore">SubstituteInheritBefore</a> <a name="substituteinheritbefore" id="substituteinheritbefore">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Change the merge order of inherited patterns</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SubstituteInheritBefore on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SubstituteInheritBefore off</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#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_substitute</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in httpd 2.4.17 and later</td></tr> +</table> + <p>Whether to apply the inherited <code class="directive"><a href="#substitute">Substitute</a></code> + patterns first (<code>on</code>), or after the ones of the current + context (<code>off</code>). + <code class="directive">SubstituteInheritBefore</code> is itself inherited, + hence contexts that inherit it (those that don't specify their own + <code class="directive">SubstituteInheritBefore</code> value) will apply the + closest defined merge order.</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="SubstituteMaxLineLength" id="SubstituteMaxLineLength">SubstituteMaxLineLength</a> <a name="substitutemaxlinelength" id="substitutemaxlinelength">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Set the maximum line size</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SubstituteMaxLineLength <var>bytes</var>(b|B|k|K|m|M|g|G)</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SubstituteMaxLineLength 1m</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#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_substitute</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in httpd 2.4.11 and later</td></tr> +</table> + <p>The maximum line size handled by <code class="module"><a href="../mod/mod_substitute.html">mod_substitute</a></code> + is limited to restrict memory use. The limit can be configured + using <code class="directive">SubstituteMaxLineLength</code>. + The value can be given as the number of bytes and can be suffixed + with a single letter <code>b</code>, <code>B</code>, <code>k</code>, + <code>K</code>, <code>m</code>, <code>M</code>, <code>g</code>, + <code>G</code> to provide the size in bytes, kilobytes, megabytes + or gigabytes respectively.</p> + + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><Location "/"> + AddOutputFilterByType SUBSTITUTE text/html + SubstituteMaxLineLength 10m + Substitute "s/foo/bar/ni" +</Location></pre> +</div> + + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_substitute.html" title="English"> en </a> | +<a href="../fr/mod/mod_substitute.html" hreflang="fr" rel="alternate" title="Français"> fr </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 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> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_substitute.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 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> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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