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diff --git a/rubbos/app/httpd-2.0.64/docs/manual/rewrite/rewrite_guide.html.en b/rubbos/app/httpd-2.0.64/docs/manual/rewrite/rewrite_guide.html.en new file mode 100644 index 00000000..527cdac2 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/docs/manual/rewrite/rewrite_guide.html.en @@ -0,0 +1,788 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!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><!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>URL Rewriting Guide - Apache HTTP Server</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 href="../images/favicon.ico" rel="shortcut icon" /></head> +<body id="manual-page"><div id="page-header"> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.0</p> +<img alt="" src="../images/feather.gif" /></div> +<div class="up"><a href="./index.html"><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 2.0</a></div><div id="page-content"><div id="preamble"><h1>URL Rewriting Guide</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/rewrite/rewrite_guide.html" title="English"> en </a></p> +</div> + + + <p>This document supplements the <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> + <a href="../mod/mod_rewrite.html">reference documentation</a>. + It describes how one can use Apache's <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> + to solve typical URL-based problems with which webmasters are + commonony confronted. We give detailed descriptions on how to + solve each problem by configuring URL rewriting rulesets.</p> + + <div class="warning">ATTENTION: Depending on your server configuration + it may be necessary to slightly change the examples for your + situation, e.g. adding the <code>[PT]</code> flag when + additionally using <code class="module"><a href="../mod/mod_alias.html">mod_alias</a></code> and + <code class="module"><a href="../mod/mod_userdir.html">mod_userdir</a></code>, etc. Or rewriting a ruleset + to fit in <code>.htaccess</code> context instead + of per-server context. Always try to understand what a + particular ruleset really does before you use it. This + avoids many problems.</div> + + </div> +<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#canonicalurl">Canonical URLs</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#canonicalhost">Canonical Hostnames</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#moveddocroot">Moved <code>DocumentRoot</code></a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#trailingslash">Trailing Slash Problem</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#movehomedirs">Move Homedirs to Different Webserver</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#multipledirs">Search pages in more than one directory</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#setenvvars">Set Environment Variables According To URL Parts</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#uservhosts">Virtual User Hosts</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirecthome">Redirect Homedirs For Foreigners</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirectanchors">Redirecting Anchors</a></li> +<li><img alt="" src="../images/down.gif" /> Time-Dependent Rewriting</li> +<li><img alt="" src="../images/down.gif" /> Backward Compatibility for YYYY to XXXX migration</li> +<li><img alt="" src="../images/down.gif" /> <a href="#content">Content Handling</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#access">Access Restriction</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#other">Other</a></li> +</ul><h3>See also</h3><ul class="seealso"><li><a href="../mod/mod_rewrite.html">Module +documentation</a></li><li><a href="rewrite_intro.html">mod_rewrite +introduction</a></li><li><a href="rewrite_tech.html">Technical details</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="canonicalurl" id="canonicalurl">Canonical URLs</a></h2> + + + +<dl> + <dt>Description:</dt> + + <dd> + <p>On some webservers there are more than one URL for a + resource. Usually there are canonical URLs (which should be + actually used and distributed) and those which are just + shortcuts, internal ones, etc. Independent of which URL the + user supplied with the request he should finally see the + canonical one only.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We do an external HTTP redirect for all non-canonical + URLs to fix them in the location view of the Browser and + for all subsequent requests. In the example ruleset below + we replace <code>/~user</code> by the canonical + <code>/u/user</code> and fix a missing trailing slash for + <code>/u/user</code>.</p> + +<div class="example"><pre> +RewriteRule ^/<strong>~</strong>([^/]+)/?(.*) /<strong>u</strong>/$1/$2 [<strong>R</strong>] +RewriteRule ^/([uge])/(<strong>[^/]+</strong>)$ /$1/$2<strong>/</strong> [<strong>R</strong>] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="canonicalhost" id="canonicalhost">Canonical Hostnames</a></h2> + + <dl> + <dt>Description:</dt> + + <dd>The goal of this rule is to force the use of a particular + hostname, in preference to other hostnames which may be used to + reach the same site. For example, if you wish to force the use + of <strong>www.example.com</strong> instead of + <strong>example.com</strong>, you might use a variant of the + following recipe.</dd> + + <dt>Solution:</dt> + + <dd> +<p>For sites running on a port other than 80:</p> +<div class="example"><pre> +RewriteCond %{HTTP_HOST} !^fully\.qualified\.domain\.name [NC] +RewriteCond %{HTTP_HOST} !^$ +RewriteCond %{SERVER_PORT} !^80$ +RewriteRule ^/(.*) http://fully.qualified.domain.name:%{SERVER_PORT}/$1 [L,R] +</pre></div> + +<p>And for a site running on port 80</p> +<div class="example"><pre> +RewriteCond %{HTTP_HOST} !^fully\.qualified\.domain\.name [NC] +RewriteCond %{HTTP_HOST} !^$ +RewriteRule ^/(.*) http://fully.qualified.domain.name/$1 [L,R] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="moveddocroot" id="moveddocroot">Moved <code>DocumentRoot</code></a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> +<p>Usually the <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code> +of the webserver directly relates to the URL "<code>/</code>". +But often this data is not really of top-level priority. For example, +you may wish for visitors, on first entering a site, to go to a +particular subdirectory <code>/about/</code>. This may be accomplished +using the following ruleset:</p> +</dd> + + <dt>Solution:</dt> + + <dd> + <p>We redirect the URL <code>/</code> to + <code>/about/</code>: + </p> + +<div class="example"><pre> +RewriteEngine on +RewriteRule <strong>^/$</strong> /about/ [<strong>R</strong>] +</pre></div> + + <p>Note that this can also be handled using the <code class="directive"><a href="../mod/mod_alias.html#redirectmatch">RedirectMatch</a></code> directive:</p> + +<div class="example"><p><code> +RedirectMatch ^/$ http://example.com/e/www/ +</code></p></div> +</dd> +</dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="trailingslash" id="trailingslash">Trailing Slash Problem</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd><p>The vast majority of "trailing slash" problems can be dealt + with using the techniques discussed in the <a href="http://httpd.apache.org/docs/misc/FAQ-E.html#set-servername">FAQ + entry</a>. However, occasionally, there is a need to use mod_rewrite + to handle a case where a missing trailing slash causes a URL to + fail. This can happen, for example, after a series of complex + rewrite rules.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>The solution to this subtle problem is to let the server + add the trailing slash automatically. To do this + correctly we have to use an external redirect, so the + browser correctly requests subsequent images etc. If we + only did a internal rewrite, this would only work for the + directory page, but would go wrong when any images are + included into this page with relative URLs, because the + browser would request an in-lined object. For instance, a + request for <code>image.gif</code> in + <code>/~quux/foo/index.html</code> would become + <code>/~quux/image.gif</code> without the external + redirect!</p> + + <p>So, to do this trick we write:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteBase /~quux/ +RewriteRule ^foo<strong>$</strong> foo<strong>/</strong> [<strong>R</strong>] +</pre></div> + + <p>Alternately, you can put the following in a + top-level <code>.htaccess</code> file in the content directory. + But note that this creates some processing overhead.</p> + +<div class="example"><pre> +RewriteEngine on +RewriteBase /~quux/ +RewriteCond %{REQUEST_FILENAME} <strong>-d</strong> +RewriteRule ^(.+<strong>[^/]</strong>)$ $1<strong>/</strong> [R] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="movehomedirs" id="movehomedirs">Move Homedirs to Different Webserver</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Many webmasters have asked for a solution to the + following situation: They wanted to redirect just all + homedirs on a webserver to another webserver. They usually + need such things when establishing a newer webserver which + will replace the old one over time.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>The solution is trivial with <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>. + On the old webserver we just redirect all + <code>/~user/anypath</code> URLs to + <code>http://newserver/~user/anypath</code>.</p> + +<div class="example"><pre> +RewriteEngine on +RewriteRule ^/~(.+) http://<strong>newserver</strong>/~$1 [R,L] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="multipledirs" id="multipledirs">Search pages in more than one directory</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Sometimes it is necessary to let the webserver search + for pages in more than one directory. Here MultiViews or + other techniques cannot help.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We program a explicit ruleset which searches for the + files in the directories.</p> + +<div class="example"><pre> +RewriteEngine on + +# first try to find it in custom/... +# ...and if found stop and be happy: +RewriteCond /your/docroot/<strong>dir1</strong>/%{REQUEST_FILENAME} -f +RewriteRule ^(.+) /your/docroot/<strong>dir1</strong>/$1 [L] + +# second try to find it in pub/... +# ...and if found stop and be happy: +RewriteCond /your/docroot/<strong>dir2</strong>/%{REQUEST_FILENAME} -f +RewriteRule ^(.+) /your/docroot/<strong>dir2</strong>/$1 [L] + +# else go on for other Alias or ScriptAlias directives, +# etc. +RewriteRule ^(.+) - [PT] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="setenvvars" id="setenvvars">Set Environment Variables According To URL Parts</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Perhaps you want to keep status information between + requests and use the URL to encode it. But you don't want + to use a CGI wrapper for all pages just to strip out this + information.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We use a rewrite rule to strip out the status information + and remember it via an environment variable which can be + later dereferenced from within XSSI or CGI. This way a + URL <code>/foo/S=java/bar/</code> gets translated to + <code>/foo/bar/</code> and the environment variable named + <code>STATUS</code> is set to the value "java".</p> + +<div class="example"><pre> +RewriteEngine on +RewriteRule ^(.*)/<strong>S=([^/]+)</strong>/(.*) $1/$3 [E=<strong>STATUS:$2</strong>] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="uservhosts" id="uservhosts">Virtual User Hosts</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Assume that you want to provide + <code>www.<strong>username</strong>.host.domain.com</code> + for the homepage of username via just DNS A records to the + same machine and without any virtualhosts on this + machine.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>For HTTP/1.0 requests there is no solution, but for + HTTP/1.1 requests which contain a Host: HTTP header we + can use the following ruleset to rewrite + <code>http://www.username.host.com/anypath</code> + internally to <code>/home/username/anypath</code>:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteCond %{<strong>HTTP_HOST</strong>} ^www\.<strong>[^.]+</strong>\.host\.com$ +RewriteRule ^(.+) %{HTTP_HOST}$1 [C] +RewriteRule ^www\.<strong>([^.]+)</strong>\.host\.com(.*) /home/<strong>$1</strong>$2 +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="redirecthome" id="redirecthome">Redirect Homedirs For Foreigners</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>We want to redirect homedir URLs to another webserver + <code>www.somewhere.com</code> when the requesting user + does not stay in the local domain + <code>ourdomain.com</code>. This is sometimes used in + virtual host contexts.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>Just a rewrite condition:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteCond %{REMOTE_HOST} <strong>!^.+\.ourdomain\.com$</strong> +RewriteRule ^(/~.+) http://www.somewhere.com/$1 [R,L] +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="redirectanchors" id="redirectanchors">Redirecting Anchors</a></h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>By default, redirecting to an HTML anchor doesn't work, + because mod_rewrite escapes the <code>#</code> character, + turning it into <code>%23</code>. This, in turn, breaks the + redirection.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>Use the <code>[NE]</code> flag on the + <code>RewriteRule</code>. NE stands for No Escape. + </p> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2>Time-Dependent Rewriting</h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>When tricks like time-dependent content should happen a + lot of webmasters still use CGI scripts which do for + instance redirects to specialized pages. How can it be done + via <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>?</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>There are a lot of variables named <code>TIME_xxx</code> + for rewrite conditions. In conjunction with the special + lexicographic comparison patterns <code><STRING</code>, + <code>>STRING</code> and <code>=STRING</code> we can + do time-dependent redirects:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteCond %{TIME_HOUR}%{TIME_MIN} >0700 +RewriteCond %{TIME_HOUR}%{TIME_MIN} <1900 +RewriteRule ^foo\.html$ foo.day.html +RewriteRule ^foo\.html$ foo.night.html +</pre></div> + + <p>This provides the content of <code>foo.day.html</code> + under the URL <code>foo.html</code> from + <code>07:00-19:00</code> and at the remaining time the + contents of <code>foo.night.html</code>. Just a nice + feature for a homepage...</p> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2>Backward Compatibility for YYYY to XXXX migration</h2> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>How can we make URLs backward compatible (still + existing virtually) after migrating <code>document.YYYY</code> + to <code>document.XXXX</code>, e.g. after translating a + bunch of <code>.html</code> files to <code>.phtml</code>?</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We just rewrite the name to its basename and test for + existence of the new extension. If it exists, we take + that name, else we rewrite the URL to its original state.</p> + + +<div class="example"><pre> +# backward compatibility ruleset for +# rewriting document.html to document.phtml +# when and only when document.phtml exists +# but no longer document.html +RewriteEngine on +RewriteBase /~quux/ +# parse out basename, but remember the fact +RewriteRule ^(.*)\.html$ $1 [C,E=WasHTML:yes] +# rewrite to document.phtml if exists +RewriteCond %{REQUEST_FILENAME}.phtml -f +RewriteRule ^(.*)$ $1.phtml [S=1] +# else reverse the previous basename cutout +RewriteCond %{ENV:WasHTML} ^yes$ +RewriteRule ^(.*)$ $1.html +</pre></div> + </dd> + </dl> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="content" id="content">Content Handling</a></h2> + + + + <h3>From Old to New (intern)</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Assume we have recently renamed the page + <code>foo.html</code> to <code>bar.html</code> and now want + to provide the old URL for backward compatibility. Actually + we want that users of the old URL even not recognize that + the pages was renamed.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We rewrite the old URL to the new one internally via the + following rule:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteBase /~quux/ +RewriteRule ^<strong>foo</strong>\.html$ <strong>bar</strong>.html +</pre></div> + </dd> + </dl> + + + + <h3>From Old to New (extern)</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Assume again that we have recently renamed the page + <code>foo.html</code> to <code>bar.html</code> and now want + to provide the old URL for backward compatibility. But this + time we want that the users of the old URL get hinted to + the new one, i.e. their browsers Location field should + change, too.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We force a HTTP redirect to the new URL which leads to a + change of the browsers and thus the users view:</p> + +<div class="example"><pre> +RewriteEngine on +RewriteBase /~quux/ +RewriteRule ^<strong>foo</strong>\.html$ <strong>bar</strong>.html [<strong>R</strong>] +</pre></div> + </dd> + </dl> + + + + <h3>From Static to Dynamic</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>How can we transform a static page + <code>foo.html</code> into a dynamic variant + <code>foo.cgi</code> in a seamless way, i.e. without notice + by the browser/user.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We just rewrite the URL to the CGI-script and force the + correct MIME-type so it gets really run as a CGI-script. + This way a request to <code>/~quux/foo.html</code> + internally leads to the invocation of + <code>/~quux/foo.cgi</code>.</p> + +<div class="example"><pre> +RewriteEngine on +RewriteBase /~quux/ +RewriteRule ^foo\.<strong>html</strong>$ foo.<strong>cgi</strong> [T=<strong>application/x-httpd-cgi</strong>] +</pre></div> + </dd> + </dl> + + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="access" id="access">Access Restriction</a></h2> + + + + <h3>Blocking of Robots</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>How can we block a really annoying robot from + retrieving pages of a specific webarea? A + <code>/robots.txt</code> file containing entries of the + "Robot Exclusion Protocol" is typically not enough to get + rid of such a robot.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We use a ruleset which forbids the URLs of the webarea + <code>/~quux/foo/arc/</code> (perhaps a very deep + directory indexed area where the robot traversal would + create big server load). We have to make sure that we + forbid access only to the particular robot, i.e. just + forbidding the host where the robot runs is not enough. + This would block users from this host, too. We accomplish + this by also matching the User-Agent HTTP header + information.</p> + +<div class="example"><pre> +RewriteCond %{HTTP_USER_AGENT} ^<strong>NameOfBadRobot</strong>.* +RewriteCond %{REMOTE_ADDR} ^<strong>123\.45\.67\.[8-9]</strong>$ +RewriteRule ^<strong>/~quux/foo/arc/</strong>.+ - [<strong>F</strong>] +</pre></div> + </dd> + </dl> + + + + <h3>Blocked Inline-Images</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>Assume we have under <code>http://www.quux-corp.de/~quux/</code> + some pages with inlined GIF graphics. These graphics are + nice, so others directly incorporate them via hyperlinks to + their pages. We don't like this practice because it adds + useless traffic to our server.</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>While we cannot 100% protect the images from inclusion, + we can at least restrict the cases where the browser + sends a HTTP Referer header.</p> + +<div class="example"><pre> +RewriteCond %{HTTP_REFERER} <strong>!^$</strong> +RewriteCond %{HTTP_REFERER} !^http://www.quux-corp.de/~quux/.*$ [NC] +RewriteRule <strong>.*\.gif$</strong> - [F] +</pre></div> + +<div class="example"><pre> +RewriteCond %{HTTP_REFERER} !^$ +RewriteCond %{HTTP_REFERER} !.*/foo-with-gif\.html$ +RewriteRule <strong>^inlined-in-foo\.gif$</strong> - [F] +</pre></div> + </dd> + </dl> + + + + <h3>Proxy Deny</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>How can we forbid a certain host or even a user of a + special host from using the Apache proxy?</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>We first have to make sure <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> + is below(!) <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> in the Configuration + file when compiling the Apache webserver. This way it gets + called <em>before</em> <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. Then we + configure the following for a host-dependent deny...</p> + +<div class="example"><pre> +RewriteCond %{REMOTE_HOST} <strong>^badhost\.mydomain\.com$</strong> +RewriteRule !^http://[^/.]\.mydomain.com.* - [F] +</pre></div> + + <p>...and this one for a user@host-dependent deny:</p> + +<div class="example"><pre> +RewriteCond %{REMOTE_IDENT}@%{REMOTE_HOST} <strong>^badguy@badhost\.mydomain\.com$</strong> +RewriteRule !^http://[^/.]\.mydomain.com.* - [F] +</pre></div> + </dd> + </dl> + + + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="other" id="other">Other</a></h2> + + + + <h3>External Rewriting Engine</h3> + + + + <dl> + <dt>Description:</dt> + + <dd> + <p>A FAQ: How can we solve the FOO/BAR/QUUX/etc. + problem? There seems no solution by the use of + <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>...</p> + </dd> + + <dt>Solution:</dt> + + <dd> + <p>Use an external <code class="directive"><a href="../mod/mod_rewrite.html#rewritemap">RewriteMap</a></code>, i.e. a program which acts + like a <code class="directive"><a href="../mod/mod_rewrite.html#rewritemap">RewriteMap</a></code>. It is run once on startup of Apache + receives the requested URLs on <code>STDIN</code> and has + to put the resulting (usually rewritten) URL on + <code>STDOUT</code> (same order!).</p> + +<div class="example"><pre> +RewriteEngine on +RewriteMap quux-map <strong>prg:</strong>/path/to/map.quux.pl +RewriteRule ^/~quux/(.*)$ /~quux/<strong>${quux-map:$1}</strong> +</pre></div> + +<div class="example"><pre> +#!/path/to/perl + +# disable buffered I/O which would lead +# to deadloops for the Apache server +$| = 1; + +# read URLs one per line from stdin and +# generate substitution URL on stdout +while (<>) { + s|^foo/|bar/|; + print $_; +} +</pre></div> + + <p>This is a demonstration-only example and just rewrites + all URLs <code>/~quux/foo/...</code> to + <code>/~quux/bar/...</code>. Actually you can program + whatever you like. But notice that while such maps can be + <strong>used</strong> also by an average user, only the + system administrator can <strong>define</strong> it.</p> + </dd> + </dl> + + + + </div></div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/rewrite/rewrite_guide.html" title="English"> en </a></p> +</div><div id="footer"> +<p class="apache">Copyright 2009 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="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div> +</body></html>
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