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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
| commit | fe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch) | |
| tree | b80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /docs/manual/mod/mod_alias.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-upstream/2.4.56.tar.xz apache2-upstream/2.4.56.zip | |
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/mod/mod_alias.html.en')
| -rw-r--r-- | docs/manual/mod/mod_alias.html.en | 635 |
1 files changed, 635 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_alias.html.en b/docs/manual/mod/mod_alias.html.en new file mode 100644 index 0000000..5468a29 --- /dev/null +++ b/docs/manual/mod/mod_alias.html.en @@ -0,0 +1,635 @@ +<?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_alias - 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_alias</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_alias.html" title="English"> en </a> | +<a href="../fr/mod/mod_alias.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="../ja/mod/mod_alias.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/mod/mod_alias.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="../tr/mod/mod_alias.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides for mapping different parts of the host + filesystem in the document tree and for URL redirection</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>alias_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_alias.c</td></tr></table> +<h3>Summary</h3> + + <p>The directives contained in this module allow for manipulation + and control of URLs as requests arrive at the server. The + <code class="directive"><a href="#alias">Alias</a></code> and <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> directives are used to + map between URLs and filesystem paths. This allows for content + which is not directly under the <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code> served as part of the web + document tree. The <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> directive has the + additional effect of marking the target directory as containing + only CGI scripts.</p> + + <p>The <code class="directive"><a href="#redirect">Redirect</a></code> + directives are used to instruct clients to make a new request with + a different URL. They are often used when a resource has moved to + a new location.</p> + + <p>When the <code class="directive"><a href="#alias">Alias</a></code>, + <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> and + <code class="directive"><a href="#redirect">Redirect</a></code> directives are used + within a <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + or <code class="directive"><a href="../mod/core.html#locationmatch"><LocationMatch></a></code> + section, <a href="../expr.html">expression syntax</a> can be used + to manipulate the destination path or URL. + </p> + + <p><code class="module"><a href="../mod/mod_alias.html">mod_alias</a></code> is designed to handle simple URL + manipulation tasks. For more complicated tasks such as + manipulating the query string, use the tools provided by + <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>.</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>Topics</h3> +<ul id="topics"> +<li><img alt="" src="../images/down.gif" /> <a href="#order">Order of Processing</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#alias">Alias</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#aliasmatch">AliasMatch</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirect">Redirect</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirectmatch">RedirectMatch</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirectpermanent">RedirectPermanent</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#redirecttemp">RedirectTemp</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#scriptalias">ScriptAlias</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#scriptaliasmatch">ScriptAliasMatch</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_alias">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_alias">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code></li> +<li><a href="../urlmapping.html">Mapping URLs to the filesystem</a></li> +<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="order" id="order">Order of Processing</a></h2> + + <p>Aliases and Redirects occurring in different contexts are processed + like other directives according to standard <a href="../sections.html#mergin">merging rules</a>. But when multiple + Aliases or Redirects occur in the same context (for example, in the + same <code class="directive"><a href="../mod/core.html#virtualhost"><VirtualHost></a></code> + section) they are processed in a particular order.</p> + + <p>First, all Redirects are processed before Aliases are processed, + and therefore a request that matches a <code class="directive"><a href="#redirect">Redirect</a></code> or <code class="directive"><a href="#redirectmatch">RedirectMatch</a></code> will never have Aliases + applied. Second, the Aliases and Redirects are processed in the order + they appear in the configuration files, with the first match taking + precedence.</p> + + <p>For this reason, when two or more of these directives apply to the + same sub-path, you must list the most specific path first in order for + all the directives to have an effect. For example, the following + configuration will work as expected:</p> + + <pre class="prettyprint lang-config">Alias "/foo/bar" "/baz" +Alias "/foo" "/gaq"</pre> + + + <p>But if the above two directives were reversed in order, the + <code>/foo</code> <code class="directive"><a href="#alias">Alias</a></code> + would always match before the <code>/foo/bar</code> <code class="directive"><a href="#alias">Alias</a></code>, so the latter directive would be + ignored.</p> + + <p>When the <code class="directive"><a href="#alias">Alias</a></code>, + <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> and + <code class="directive"><a href="#redirect">Redirect</a></code> directives are used + within a <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + or <code class="directive"><a href="../mod/core.html#locationmatch"><LocationMatch></a></code> + section, these directives will take precedence over any globally + defined <code class="directive"><a href="#alias">Alias</a></code>, + <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> and + <code class="directive"><a href="#redirect">Redirect</a></code> directives.</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="Alias" id="Alias">Alias</a> <a name="alias" id="alias">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maps URLs to filesystem locations</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Alias [<var>URL-path</var>] +<var>file-path</var>|<var>directory-path</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_alias</td></tr> +</table> + + <p>The <code class="directive">Alias</code> directive allows documents to + be stored in the local filesystem other than under the + <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code>. URLs with a + (%-decoded) path beginning with <var>URL-path</var> will be mapped + to local files beginning with <var>directory-path</var>. The + <var>URL-path</var> is case-sensitive, even on case-insensitive + file systems.</p> + + <pre class="prettyprint lang-config">Alias "/image" "/ftp/pub/image"</pre> + + + <p>A request for <code>http://example.com/image/foo.gif</code> would cause + the server to return the file <code>/ftp/pub/image/foo.gif</code>. Only + complete path segments are matched, so the above alias would not match a + request for <code>http://example.com/imagefoo.gif</code>. For more complex + matching using regular expressions, see the <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> directive.</p> + + <p>Note that if you include a trailing / on the + <var>URL-path</var> then the server will require a trailing / in + order to expand the alias. That is, if you use</p> + + <pre class="prettyprint lang-config">Alias "/icons/" "/usr/local/apache/icons/"</pre> + + + <p>then the URL <code>/icons</code> will not be aliased, as it lacks + that trailing /. Likewise, if you omit the slash on the + <var>URL-path</var> then you must also omit it from the + <var>file-path</var>.</p> + + <p>Note that you may need to specify additional <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code> sections which + cover the <em>destination</em> of aliases. Aliasing occurs before + <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code> sections + are checked, so only the destination of aliases are affected. + (Note however <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + sections are run through once before aliases are performed, so + they will apply.)</p> + + <p>In particular, if you are creating an <code>Alias</code> to a + directory outside of your <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code>, you may need to explicitly + permit access to the target directory.</p> + + <pre class="prettyprint lang-config">Alias "/image" "/ftp/pub/image" +<Directory "/ftp/pub/image"> + Require all granted +</Directory></pre> + + + <p>Any number slashes in the <var>URL-path</var> parameter + matches any number of slashes in the requested URL-path.</p> + + <p>If the <code class="directive">Alias</code> directive is used within a + <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + or <code class="directive"><a href="../mod/core.html#locationmatch"><LocationMatch></a></code> + section the URL-path is omitted, and the file-path is interpreted + using <a href="../expr.html">expression syntax</a>.<br /> + This syntax is available in Apache 2.4.19 and later.</p> + + <pre class="prettyprint lang-config"><Location "/image"> + Alias "/ftp/pub/image" +</Location> +<LocationMatch "/error/(?<NUMBER>[0-9]+)"> + Alias "/usr/local/apache/errors/%{env:MATCH_NUMBER}.html" +</LocationMatch></pre> + + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="AliasMatch" id="AliasMatch">AliasMatch</a> <a name="aliasmatch" id="aliasmatch">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maps URLs to filesystem locations using regular +expressions</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AliasMatch <var>regex</var> +<var>file-path</var>|<var>directory-path</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</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_alias</td></tr> +</table> + <p>This directive is equivalent to <code class="directive"><a href="#alias">Alias</a></code>, but makes use of + <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expressions</a>, + instead of simple prefix matching. The + supplied regular expression is matched against the URL-path, and + if it matches, the server will substitute any parenthesized + matches into the given string and use it as a filename. For + example, to activate the <code>/icons</code> directory, one might + use:</p> + + <pre class="prettyprint lang-config">AliasMatch "^/icons(/|$)(.*)" "/usr/local/apache/icons$1$2"</pre> + + + <p>The full range of <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expression</a> + power is available. For example, + it is possible to construct an alias with case-insensitive + matching of the URL-path:</p> + + <pre class="prettyprint lang-config">AliasMatch "(?i)^/image(.*)" "/ftp/pub/image$1"</pre> + + + <p>One subtle difference + between <code class="directive"><a href="#alias">Alias</a></code> + and <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> is + that <code class="directive"><a href="#alias">Alias</a></code> will + automatically copy any additional part of the URI, past the part + that matched, onto the end of the file path on the right side, + while <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> will + not. This means that in almost all cases, you will want the + regular expression to match the entire request URI from beginning + to end, and to use substitution on the right side.</p> + + <p>In other words, just changing + <code class="directive"><a href="#alias">Alias</a></code> to + <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> will not + have the same effect. At a minimum, you need to + add <code>^</code> to the beginning of the regular expression + and add <code>(.*)$</code> to the end, and add <code>$1</code> to + the end of the replacement.</p> + + <p>For example, suppose you want to replace this with AliasMatch:</p> + + <pre class="prettyprint lang-config">Alias "/image/" "/ftp/pub/image/"</pre> + + + <p>This is NOT equivalent - don't do this! This will send all + requests that have /image/ anywhere in them to /ftp/pub/image/:</p> + + <pre class="prettyprint lang-config">AliasMatch "/image/" "/ftp/pub/image/"</pre> + + + <p>This is what you need to get the same effect:</p> + + <pre class="prettyprint lang-config">AliasMatch "^/image/(.*)$" "/ftp/pub/image/$1"</pre> + + + <p>Of course, there's no point in + using <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> + where <code class="directive"><a href="#alias">Alias</a></code> would + work. <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> lets + you do more complicated things. For example, you could + serve different kinds of files from different directories:</p> + + <pre class="prettyprint lang-config">AliasMatch "^/image/(.*)\.jpg$" "/files/jpg.images/$1.jpg" +AliasMatch "^/image/(.*)\.gif$" "/files/gif.images/$1.gif"</pre> + + + <p>Multiple leading slashes in the requested URL are discarded + by the server before directives from this module compares + against the requested URL-path. + </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="Redirect" id="Redirect">Redirect</a> <a name="redirect" id="redirect">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sends an external redirect asking the client to fetch +a different URL</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Redirect [<var>status</var>] [<var>URL-path</var>] +<var>URL</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>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_alias</td></tr> +</table> + <p>The <code class="directive">Redirect</code> directive maps an old URL into a new one by asking + the client to refetch the resource at the new location.</p> + + <p>The old <em>URL-path</em> is a case-sensitive (%-decoded) path + beginning with a slash. A relative path is not allowed.</p> + + <p>The new <em>URL</em> may be either an absolute URL beginning + with a scheme and hostname, or a URL-path beginning with a slash. + In this latter case the scheme and hostname of the current server will + be added.</p> + + <p>Then any request beginning with <em>URL-path</em> will return a + redirect request to the client at the location of the target + <em>URL</em>. Additional path information beyond the matched + <em>URL-path</em> will be appended to the target URL.</p> + + <pre class="prettyprint lang-config"># Redirect to a URL on a different host +Redirect "/service" "http://foo2.example.com/service" + +# Redirect to a URL on the same host +Redirect "/one" "/two"</pre> + + + <p>If the client requests <code>http://example.com/service/foo.txt</code>, + it will be told to access + <code>http://foo2.example.com/service/foo.txt</code> + instead. This includes requests with <code>GET</code> parameters, such as + <code>http://example.com/service/foo.pl?q=23&a=42</code>, + it will be redirected to + <code>http://foo2.example.com/service/foo.pl?q=23&a=42</code>. + Note that <code>POST</code>s will be discarded.<br /> + Only complete path segments are matched, so the above + example would not match a request for + <code>http://example.com/servicefoo.txt</code>. For more complex matching + using the <a href="../expr.html">expression syntax</a>, omit the URL-path + argument as described below. Alternatively, for matching using regular + expressions, see the <code class="directive"><a href="#redirectmatch">RedirectMatch</a></code> directive.</p> + + + <div class="note"><h3>Note</h3> + <p><code class="directive">Redirect</code> directives take precedence over <code class="directive"><a href="#alias">Alias</a></code> and <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> + directives, irrespective of their ordering in the configuration + file. <code class="directive">Redirect</code> directives inside a Location take + precedence over <code class="directive">Redirect</code> and <code class="directive"><a href="#alias">Alias</a></code> directives with an <var>URL-path</var>.</p> + </div> + + <p>If no <var>status</var> argument is given, the redirect will + be "temporary" (HTTP status 302). This indicates to the client + that the resource has moved temporarily. The <var>status</var> + argument can be used to return other HTTP status codes:</p> + + <dl> + <dt>permanent</dt> + + <dd>Returns a permanent redirect status (301) indicating that + the resource has moved permanently.</dd> + + <dt>temp</dt> + + <dd>Returns a temporary redirect status (302). This is the + default.</dd> + + <dt>seeother</dt> + + <dd>Returns a "See Other" status (303) indicating that the + resource has been replaced.</dd> + + <dt>gone</dt> + + <dd>Returns a "Gone" status (410) indicating that the + resource has been permanently removed. When this status is + used the <var>URL</var> argument should be omitted.</dd> + </dl> + + <p>Other status codes can be returned by giving the numeric + status code as the value of <var>status</var>. If the status is + between 300 and 399, the <var>URL</var> argument must be present. + If the status is <em>not</em> between 300 and 399, the + <var>URL</var> argument must be omitted. The status must be a valid + HTTP status code, known to the Apache HTTP Server (see the function + <code>send_error_response</code> in http_protocol.c).</p> + + <pre class="prettyprint lang-config">Redirect permanent "/one" "http://example.com/two" +Redirect 303 "/three" "http://example.com/other"</pre> + + + <p>If the <code class="directive">Redirect</code> directive is used within a + <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + or <code class="directive"><a href="../mod/core.html#locationmatch"><LocationMatch></a></code> + section with the <var>URL-path</var> omitted, then the <var>URL</var> parameter + will be interpreted using <a href="../expr.html">expression syntax</a>.<br /> + This syntax is available in Apache 2.4.19 and later.</p> + + <pre class="prettyprint lang-config"><Location "/one"> + Redirect permanent "http://example.com/two" +</Location> +<Location "/three"> + Redirect 303 "http://example.com/other" +</Location> +<LocationMatch "/error/(?<NUMBER>[0-9]+)"> + Redirect permanent "http://example.com/errors/%{env:MATCH_NUMBER}.html" +</LocationMatch></pre> + + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="RedirectMatch" id="RedirectMatch">RedirectMatch</a> <a name="redirectmatch" id="redirectmatch">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sends an external redirect based on a regular expression match +of the current URL</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RedirectMatch [<var>status</var>] <var>regex</var> +<var>URL</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>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_alias</td></tr> +</table> + <p>This directive is equivalent to <code class="directive"><a href="#redirect">Redirect</a></code>, but makes use of + <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expressions</a>, + instead of simple prefix matching. The + supplied regular expression is matched against the URL-path, and + if it matches, the server will substitute any parenthesized + matches into the given string and use it as a filename. For + example, to redirect all GIF files to like-named JPEG files on + another server, one might use:</p> + + <pre class="prettyprint lang-config">RedirectMatch "(.*)\.gif$" "http://other.example.com$1.jpg"</pre> + + + <p>The considerations related to the difference between + <code class="directive"><a href="#alias">Alias</a></code> and + <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> + also apply to the difference between + <code class="directive"><a href="#redirect">Redirect</a></code> and + <code class="directive"><a href="#redirectmatch">RedirectMatch</a></code>. + See <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> for + details.</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="RedirectPermanent" id="RedirectPermanent">RedirectPermanent</a> <a name="redirectpermanent" id="redirectpermanent">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sends an external permanent redirect asking the client to fetch +a different URL</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RedirectPermanent <var>URL-path</var> <var>URL</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>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_alias</td></tr> +</table> + <p>This directive makes the client know that the Redirect is + permanent (status 301). Exactly equivalent to <code>Redirect + permanent</code>.</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="RedirectTemp" id="RedirectTemp">RedirectTemp</a> <a name="redirecttemp" id="redirecttemp">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sends an external temporary redirect asking the client to fetch +a different URL</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RedirectTemp <var>URL-path</var> <var>URL</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>Base</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_alias</td></tr> +</table> + <p>This directive makes the client know that the Redirect is + only temporary (status 302). Exactly equivalent to + <code>Redirect temp</code>.</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="ScriptAlias" id="ScriptAlias">ScriptAlias</a> <a name="scriptalias" id="scriptalias">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maps a URL to a filesystem location and designates the +target as a CGI script</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptAlias [<var>URL-path</var>] +<var>file-path</var>|<var>directory-path</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_alias</td></tr> +</table> + <p>The <code class="directive">ScriptAlias</code> directive has the same + behavior as the <code class="directive"><a href="#alias">Alias</a></code> + directive, except that in addition it marks the target directory + as containing CGI scripts that will be processed by <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>'s cgi-script handler. URLs with a case-sensitive + (%-decoded) path beginning with <var>URL-path</var> will be mapped + to scripts beginning with the second argument, which is a full + pathname in the local filesystem.</p> + + <pre class="prettyprint lang-config">ScriptAlias "/cgi-bin/" "/web/cgi-bin/"</pre> + + + <p>A request for <code>http://example.com/cgi-bin/foo</code> would cause the + server to run the script <code>/web/cgi-bin/foo</code>. This configuration + is essentially equivalent to:</p> + <pre class="prettyprint lang-config">Alias "/cgi-bin/" "/web/cgi-bin/" +<Location "/cgi-bin"> + SetHandler cgi-script + Options +ExecCGI +</Location></pre> + + + <p><code class="directive">ScriptAlias</code> can also be used in conjunction with + a script or handler you have. For example:</p> + + <pre class="prettyprint lang-config">ScriptAlias "/cgi-bin/" "/web/cgi-handler.pl"</pre> + + + <p>In this scenario all files requested in <code>/cgi-bin/</code> will be + handled by the file you have configured, this allows you to use your own custom + handler. You may want to use this as a wrapper for CGI so that you can add + content, or some other bespoke action.</p> + + <div class="warning">It is safer to avoid placing CGI scripts under the + <code class="directive"><a href="../mod/core.html#documentroot">DocumentRoot</a></code> in order to + avoid accidentally revealing their source code if the + configuration is ever changed. The + <code class="directive">ScriptAlias</code> makes this easy by mapping a + URL and designating CGI scripts at the same time. If you do + choose to place your CGI scripts in a directory already + accessible from the web, do not use + <code class="directive">ScriptAlias</code>. Instead, use <code class="directive"><a href="../mod/core.html#directory"><Directory></a></code>, <code class="directive"><a href="../mod/core.html#sethandler">SetHandler</a></code>, and <code class="directive"><a href="../mod/core.html#options">Options</a></code> as in: + <pre class="prettyprint lang-config"><Directory "/usr/local/apache2/htdocs/cgi-bin"> + SetHandler cgi-script + Options ExecCGI +</Directory></pre> + + This is necessary since multiple <var>URL-paths</var> can map + to the same filesystem location, potentially bypassing the + <code class="directive">ScriptAlias</code> and revealing the source code + of the CGI scripts if they are not restricted by a + <code class="directive"><a href="../mod/core.html#directory">Directory</a></code> section.</div> + + <p>If the <code class="directive">ScriptAlias</code> directive is used within + a <code class="directive"><a href="../mod/core.html#location"><Location></a></code> + or <code class="directive"><a href="../mod/core.html#locationmatch"><LocationMatch></a></code> + section with the URL-path omitted, then the URL parameter will be + interpreted using <a href="../expr.html">expression syntax</a>.<br /> + This syntax is available in Apache 2.4.19 and later.</p> + + <pre class="prettyprint lang-config"><Location "/cgi-bin"> + ScriptAlias "/web/cgi-bin/" +</Location> +<LocationMatch "/cgi-bin/errors/(?<NUMBER>[0-9]+)"> + ScriptAlias "/web/cgi-bin/errors/%{env:MATCH_NUMBER}.cgi" +</LocationMatch></pre> + + + +<h3>See also</h3> +<ul> +<li><a href="../howto/cgi.html">CGI Tutorial</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="ScriptAliasMatch" id="ScriptAliasMatch">ScriptAliasMatch</a> <a name="scriptaliasmatch" id="scriptaliasmatch">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maps a URL to a filesystem location using a regular expression +and designates the target as a CGI script</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ScriptAliasMatch <var>regex</var> +<var>file-path</var>|<var>directory-path</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</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_alias</td></tr> +</table> + <p>This directive is equivalent to <code class="directive"><a href="#scriptalias">ScriptAlias</a></code>, but makes use of + <a class="glossarylink" href="../glossary.html#regex" title="see glossary">regular expressions</a>, + instead of simple prefix matching. The + supplied regular expression is matched against the URL-path, + and if it matches, the server will substitute any parenthesized + matches into the given string and use it as a filename. For + example, to activate the standard <code>/cgi-bin</code>, one + might use:</p> + + <pre class="prettyprint lang-config">ScriptAliasMatch "^/cgi-bin(.*)" "/usr/local/apache/cgi-bin$1"</pre> + + + <p>As for AliasMatch, the full range of <a class="glossarylink" href="../glossary.html#rexex" title="see glossary">regular + expression</a> power is available. + For example, it is possible to construct an alias with case-insensitive + matching of the URL-path:</p> + + <pre class="prettyprint lang-config">ScriptAliasMatch "(?i)^/cgi-bin(.*)" "/usr/local/apache/cgi-bin$1"</pre> + + + <p>The considerations related to the difference between + <code class="directive"><a href="#alias">Alias</a></code> and + <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> + also apply to the difference between + <code class="directive"><a href="#scriptalias">ScriptAlias</a></code> and + <code class="directive"><a href="#scriptaliasmatch">ScriptAliasMatch</a></code>. + See <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> for + details.</p> + + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_alias.html" title="English"> en </a> | +<a href="../fr/mod/mod_alias.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | +<a href="../ja/mod/mod_alias.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/mod/mod_alias.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="../tr/mod/mod_alias.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </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. 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