diff options
Diffstat (limited to '')
| -rw-r--r-- | docs/manual/mod/mod_proxy_html.html.en | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_proxy_html.html.en b/docs/manual/mod/mod_proxy_html.html.en new file mode 100644 index 0000000..2f94ea4 --- /dev/null +++ b/docs/manual/mod/mod_proxy_html.html.en @@ -0,0 +1,490 @@ +<?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_proxy_html - 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_proxy_html</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_html.html" title="English"> en </a> | +<a href="../fr/mod/mod_proxy_html.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>Rewrite HTML links in to ensure they are addressable +from Clients' networks in a proxy context.</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_html_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_html.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later. Available as a third-party module +for earlier 2.x versions</td></tr></table> +<h3>Summary</h3> + +<p>This module provides an output filter to rewrite HTML links in a +proxy situation, to ensure that links work for users outside the proxy. +It serves the same purpose as Apache's <code class="directive"><a href="../mod/mod_proxy.html#proxypassreverse">ProxyPassReverse</a></code> directive does +for HTTP headers, and is an essential component of a reverse proxy.</p> + +<p>For example, if a company has an application server at +<code>appserver.example.com</code> that is only visible from within +the company's internal network, and a public webserver +<code>www.example.com</code>, they may wish to provide a gateway to the +application server at <code>http://www.example.com/appserver/</code>. +When the application server links to itself, those links need to be +rewritten to work through the gateway. <code class="module"><a href="../mod/mod_proxy_html.html">mod_proxy_html</a></code> serves to rewrite +<code><a href="http://appserver.example.com/foo/bar.html">foobar</a></code> to +<code><a href="http://www.example.com/appserver/foo/bar.html">foobar</a></code> +making it accessible from outside.</p> + +<p>mod_proxy_html was originally developed at WebÞing, whose +extensive <a href="http://apache.webthing.com/mod_proxy_html/">documentation</a> may be useful to users.</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="#proxyhtmlbufsize">ProxyHTMLBufSize</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlcharsetout">ProxyHTMLCharsetOut</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmldoctype">ProxyHTMLDocType</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlenable">ProxyHTMLEnable</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlevents">ProxyHTMLEvents</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlextended">ProxyHTMLExtended</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlfixups">ProxyHTMLFixups</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlinterp">ProxyHTMLInterp</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmllinks">ProxyHTMLLinks</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlmeta">ProxyHTMLMeta</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlstripcomments">ProxyHTMLStripComments</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#proxyhtmlurlmap">ProxyHTMLURLMap</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_proxy_html">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_proxy_html">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="ProxyHTMLBufSize" id="ProxyHTMLBufSize">ProxyHTMLBufSize</a> <a name="proxyhtmlbufsize" id="proxyhtmlbufsize">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the buffer size increment for buffering inline scripts and +stylesheets.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLBufSize <var>bytes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLBufSize 8192</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>In order to parse non-HTML content (stylesheets and scripts) embedded +in HTML documents, <code class="module"><a href="../mod/mod_proxy_html.html">mod_proxy_html</a></code> +has to read the entire script or stylesheet into a buffer. This buffer will +be expanded as necessary to hold the largest script or stylesheet in a page, +in increments of <var>bytes</var> as set by this directive.</p> +<p>The default is 8192, and will work well for almost all pages. However, +if you know you're proxying pages containing stylesheets and/or +scripts bigger than 8K (that is, for a single script or stylesheet, +NOT in total), it will be more efficient to set a larger buffer +size and avoid the need to resize the buffer dynamically during a request. +</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="ProxyHTMLCharsetOut" id="ProxyHTMLCharsetOut">ProxyHTMLCharsetOut</a> <a name="proxyhtmlcharsetout" id="proxyhtmlcharsetout">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify a charset for mod_proxy_html output.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLCharsetOut <var>Charset | *</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>This selects an encoding for mod_proxy_html output. It should not +normally be used, as any change from the default <code>UTF-8</code> +(Unicode - as used internally by libxml2) will impose an additional +processing overhead. The special token <code>ProxyHTMLCharsetOut *</code> +will generate output using the same encoding as the input.</p> +<p>Note that this relies on <code class="module"><a href="../mod/mod_xml2enc.html">mod_xml2enc</a></code> being loaded.</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="ProxyHTMLDocType" id="ProxyHTMLDocType">ProxyHTMLDocType</a> <a name="proxyhtmldoctype" id="proxyhtmldoctype">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets an HTML or XHTML document type declaration.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLDocType HTML|XHTML [Legacy]<br /><strong>OR</strong> +<br />ProxyHTMLDocType <var>fpi</var> [SGML|XML]</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>In the first form, documents will be declared as HTML 4.01 or XHTML 1.0 +according to the option selected. This option also determines whether +HTML or XHTML syntax is used for output. Note that the format of the +documents coming from the backend server is immaterial: the parser will +deal with it automatically. If the optional second argument is set to +<code>Legacy</code>, documents will be declared "Transitional", an option that may +be necessary if you are proxying pre-1998 content or working with defective +authoring/publishing tools.</p> +<p>In the second form, it will insert your own FPI. The optional second +argument determines whether SGML/HTML or XML/XHTML syntax will be used.</p> +<p>The default is changed to omitting any FPI, +on the grounds that no FPI is better than a bogus one. If your backend +generates decent HTML or XHTML, set it accordingly.</p> +<p>If the first form is used, mod_proxy_html +will also clean up the HTML to the specified standard. It cannot +fix every error, but it will strip out bogus elements and attributes. +It will also optionally log other errors at <code class="directive"><a href="../mod/core.html#loglevel">LogLevel</a></code> Debug.</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="ProxyHTMLEnable" id="ProxyHTMLEnable">ProxyHTMLEnable</a> <a name="proxyhtmlenable" id="proxyhtmlenable">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Turns the proxy_html filter on or off.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLEnable On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLEnable Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +module for earlier 2.x versions.</td></tr> +</table> + <p>A simple switch to enable or disable the proxy_html filter. + If <code class="module"><a href="../mod/mod_xml2enc.html">mod_xml2enc</a></code> is loaded it will also automatically + set up internationalisation support.</p> + <p>Note that the proxy_html filter will only act on HTML data + (Content-Type text/html or application/xhtml+xml) and when the + data are proxied. You can override this (at your own risk) by + setting the <var>PROXY_HTML_FORCE</var> environment variable.</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="ProxyHTMLEvents" id="ProxyHTMLEvents">ProxyHTMLEvents</a> <a name="proxyhtmlevents" id="proxyhtmlevents">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify attributes to treat as scripting events.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLEvents <var>attribute [attribute ...]</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>Specifies one or more attributes to treat as scripting events and +apply <code class="directive"><a href="#proxyhtmlurlmap">ProxyHTMLURLMap</a></code>s to where enabled. +You can specify any number of attributes in one or more +<code class="directive">ProxyHTMLEvents</code> directives.</p> +<p>Normally you'll set this globally. If you set <code class="directive">ProxyHTMLEvents</code> in more than +one scope so that one overrides the other, you'll need to specify a complete +set in each of those scopes.</p> +<p>A default configuration is supplied in <var>proxy-html.conf</var> +and defines the events in standard HTML 4 and XHTML 1.</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="ProxyHTMLExtended" id="ProxyHTMLExtended">ProxyHTMLExtended</a> <a name="proxyhtmlextended" id="proxyhtmlextended">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines whether to fix links in inline scripts, stylesheets, +and scripting events.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLExtended On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLExtended Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>Set to <code>Off</code>, HTML links are rewritten according to the +<code class="directive"><a href="#proxyhtmlurlmap">ProxyHTMLURLMap</a></code> directives, but links appearing +in Javascript and CSS are ignored.</p> +<p>Set to <code>On</code>, all scripting events (as determined by +<code class="directive"><a href="#proxyhtmlevents">ProxyHTMLEvents</a></code>) and embedded scripts or +stylesheets are also processed by the <code class="directive"><a href="#proxyhtmlurlmap">ProxyHTMLURLMap</a></code> +rules, according to the flags set for each rule. Since this requires more +parsing, performance will be best if you only enable it when strictly necessary. +</p><p> +You'll also need to take care over patterns matched, since the parser has no +knowledge of what is a URL within an embedded script or stylesheet. +In particular, extended matching of <code>/</code> is likely to lead to +false matches. +</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="ProxyHTMLFixups" id="ProxyHTMLFixups">ProxyHTMLFixups</a> <a name="proxyhtmlfixups" id="proxyhtmlfixups">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Fixes for simple HTML errors.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLFixups [lowercase] [dospath] [reset]</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>This directive takes one to three arguments as follows:</p> +<ul> +<li><code>lowercase</code> Urls are rewritten to lowercase</li> +<li><code>dospath</code> Backslashes in URLs are rewritten to forward slashes.</li> +<li><code>reset</code> Unset any options set at a higher level in the configuration.</li> +</ul> +<p>Take care when using these. The fixes will correct certain authoring +mistakes, but risk also erroneously fixing links that were correct to start with. +Only use them if you know you have a broken backend server.</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="ProxyHTMLInterp" id="ProxyHTMLInterp">ProxyHTMLInterp</a> <a name="proxyhtmlinterp" id="proxyhtmlinterp">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enables per-request interpolation of +<code class="directive">ProxyHTMLURLMap</code> rules.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLInterp On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLInterp Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +module for earlier 2.x versions</td></tr> +</table> + <p>This enables per-request interpolation in + <code class="directive"><a href="#proxyhtmlurlmap">ProxyHTMLURLMap</a></code> to- and from- patterns.</p> + <p>If interpolation is not enabled, all rules are pre-compiled at startup. + With interpolation, they must be re-compiled for every request, which + implies an extra processing overhead. It should therefore be + enabled only when necessary.</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="ProxyHTMLLinks" id="ProxyHTMLLinks">ProxyHTMLLinks</a> <a name="proxyhtmllinks" id="proxyhtmllinks">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify HTML elements that have URL attributes to be rewritten.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLLinks <var>element attribute [attribute2 ...]</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>Specifies elements that have URL attributes that should be rewritten +using standard <code class="directive"><a href="#proxyhtmlurlmap">ProxyHTMLURLMap</a></code>s. +You will need one <code class="directive">ProxyHTMLLinks</code> directive per element, +but it can have any number of attributes.</p> +<p>Normally you'll set this globally. If you set <code class="directive">ProxyHTMLLinks</code> in more than +one scope so that one overrides the other, you'll need to specify a complete +set in each of those scopes.</p> +<p>A default configuration is supplied in <var>proxy-html.conf</var> +and defines the HTML links for standard HTML 4 and XHTML 1.</p> +<div class="example"><h3>Examples from proxy-html.conf</h3><pre class="prettyprint lang-config">ProxyHTMLLinks a href +ProxyHTMLLinks area href +ProxyHTMLLinks link href +ProxyHTMLLinks img src longdesc usemap +ProxyHTMLLinks object classid codebase data usemap +ProxyHTMLLinks q cite +ProxyHTMLLinks blockquote cite +ProxyHTMLLinks ins cite +ProxyHTMLLinks del cite +ProxyHTMLLinks form action +ProxyHTMLLinks input src usemap +ProxyHTMLLinks head profile +ProxyHTMLLinks base href +ProxyHTMLLinks script src for</pre> +</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="ProxyHTMLMeta" id="ProxyHTMLMeta">ProxyHTMLMeta</a> <a name="proxyhtmlmeta" id="proxyhtmlmeta">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Turns on or off extra pre-parsing of metadata in HTML +<code><head></code> sections.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLMeta On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLMeta Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +module for earlier 2.x versions.</td></tr> +</table> + <p>This turns on or off pre-parsing of metadata in HTML + <code><head></code> sections.</p> + <p>If not required, turning ProxyHTMLMeta Off will give a small + performance boost by skipping this parse step. However, it + is sometimes necessary for internationalisation to work correctly.</p> + <p><code class="directive">ProxyHTMLMeta</code> has two effects. Firstly and most importantly + it enables detection of character encodings declared in the form</p> + <pre><meta http-equiv="Content-Type" content="text/html;charset=<var>foo</var>"></pre> + <p>or, in the case of an XHTML document, an XML declaration. + It is NOT required if the charset is declared in a real HTTP header + (which is always preferable) from the backend server, nor if the + document is <var>utf-8</var> (unicode) or a subset such as ASCII. + You may also be able to dispense with it where documents use a + default declared using <code class="directive"><a href="../mod/mod_xml2enc.html#xml2encdefault">xml2EncDefault</a></code>, but that risks propagating an + incorrect declaration. A <code class="directive"><a href="#proxyhtmlcharsetout">ProxyHTMLCharsetOut</a></code> + can remove that risk, but is likely to be a bigger processing + overhead than enabling ProxyHTMLMeta.</p> + <p>The other effect of enabling <code class="directive">ProxyHTMLMeta</code> is to parse all + <code><meta http-equiv=...></code> declarations and convert + them to real HTTP headers, in keeping with the original purpose + of this form of the HTML <meta> element.</p> + + <div class="warning"><h3>Warning</h3> + Because ProxyHTMLMeta promotes <strong>all</strong> + <code>http-equiv</code> elements to HTTP headers, it is important that you + only enable it in cases where you trust the HTML content as much as you + trust the upstream server. If the HTML is controlled by bad actors, it + will be possible for them to inject arbitrary, possibly malicious, HTTP + headers into your server's responses. + </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="ProxyHTMLStripComments" id="ProxyHTMLStripComments">ProxyHTMLStripComments</a> <a name="proxyhtmlstripcomments" id="proxyhtmlstripcomments">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines whether to strip HTML comments.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLStripComments On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxyHTMLStripComments Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +for earlier 2.x versions</td></tr> +</table> +<p>This directive will cause mod_proxy_html to strip HTML comments. +Note that this will also kill off any scripts or styles embedded in +comments (a bogosity introduced in 1995/6 with Netscape 2 for the +benefit of then-older browsers, but still in use today). +It may also interfere with comment-based processors such as SSI or ESI: +be sure to run any of those <em>before</em> mod_proxy_html in the +filter chain if stripping comments!</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="ProxyHTMLURLMap" id="ProxyHTMLURLMap">ProxyHTMLURLMap</a> <a name="proxyhtmlurlmap" id="proxyhtmlurlmap">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Defines a rule to rewrite HTML links</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyHTMLURLMap <var>from-pattern to-pattern [flags] [cond]</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_html</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Version 2.4 and later; available as a third-party +module for earlier 2.x versions.</td></tr> +</table> +<p>This is the key directive for rewriting HTML links. When parsing a document, +whenever a link target matches <var>from-pattern</var>, the matching +portion will be rewritten to <var>to-pattern</var>, as modified by any +flags supplied and by the +<code class="directive"><a href="#proxyhtmlextended">ProxyHTMLExtended</a></code> directive. +Only the elements specified using +the <code class="directive"><a href="#proxyhtmllinks">ProxyHTMLLinks</a></code> directive +will be considered as HTML links.</p> + +<p>The optional third argument may define any of the following +<strong>Flags</strong>. Flags are case-sensitive.</p> +<dl> +<dt>h</dt> +<dd><p>Ignore HTML links (pass through unchanged)</p></dd> +<dt>e</dt> +<dd><p>Ignore scripting events (pass through unchanged)</p></dd> +<dt>c</dt> +<dd><p>Pass embedded script and style sections through untouched.</p></dd> + +<dt>L</dt> +<dd><p>Last-match. If this rule matches, no more rules are applied +(note that this happens automatically for HTML links).</p></dd> +<dt>l</dt> +<dd><p>Opposite to L. Overrides the one-change-only default +behaviour with HTML links.</p></dd> +<dt>R</dt> +<dd><p>Use Regular Expression matching-and-replace. <code>from-pattern</code> +is a regexp, and <code>to-pattern</code> a replacement string that may be +based on the regexp. Regexp memory is supported: you can use brackets () +in the <code>from-pattern</code> and retrieve the matches with $1 to $9 +in the <code>to-pattern</code>.</p> + +<p>If R is not set, it will use string-literal search-and-replace. +The logic is <em>starts-with</em> in HTML links, but +<em>contains</em> in scripting events and embedded script and style sections. +</p> +</dd> +<dt>x</dt> +<dd><p>Use POSIX extended Regular Expressions. Only applicable with R.</p></dd> +<dt>i</dt> +<dd><p>Case-insensitive matching. Only applicable with R.</p></dd> + +<dt>n</dt> +<dd><p>Disable regexp memory (for speed). Only applicable with R.</p></dd> +<dt>s</dt> +<dd><p>Line-based regexp matching. Only applicable with R.</p></dd> +<dt>^</dt> +<dd><p>Match at start only. This applies only to string matching +(not regexps) and is irrelevant to HTML links.</p></dd> +<dt>$</dt> +<dd><p>Match at end only. This applies only to string matching +(not regexps) and is irrelevant to HTML links.</p></dd> +<dt>V</dt> +<dd><p>Interpolate environment variables in <code>to-pattern</code>. +A string of the form <code>${varname|default}</code> will be replaced by the +value of environment variable <code>varname</code>. If that is unset, it +is replaced by <code>default</code>. The <code>|default</code> is optional.</p> +<p>NOTE: interpolation will only be enabled if +<code class="directive"><a href="#proxyhtmlinterp">ProxyHTMLInterp</a></code> is <var>On</var>.</p> +</dd> + +<dt>v</dt> +<dd><p>Interpolate environment variables in <code>from-pattern</code>. +Patterns supported are as above.</p> +<p>NOTE: interpolation will only be enabled if +<code class="directive"><a href="#proxyhtmlinterp">ProxyHTMLInterp</a></code> is <var>On</var>.</p> +</dd> +</dl> + +<p>The optional fourth <strong>cond</strong> argument defines a condition +that will be evaluated per Request, provided +<code class="directive"><a href="#proxyhtmlinterp">ProxyHTMLInterp</a></code> is <var>On</var>. +If the condition evaluates FALSE the map will not be applied in this request. +If TRUE, or if no condition is defined, the map is applied.</p> +<p>A <strong>cond</strong> is evaluated by the <a href="../expr.html">Expression Parser</a>. In addition, the simpler syntax of conditions +in mod_proxy_html 3.x for HTTPD 2.0 and 2.2 is also supported.</p> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_html.html" title="English"> en </a> | +<a href="../fr/mod/mod_proxy_html.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_proxy_html.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>
\ No newline at end of file |