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<div id="preamble"><h1>Apache Module mod_alias</h1>
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<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&nbsp;Identifier:</a></th><td>alias_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source&nbsp;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">&lt;Location&gt;</a></code>
    or <code class="directive"><a href="../mod/core.html#locationmatch">&lt;LocationMatch&gt;</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"><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="#aliaspreservepath">AliasPreservePath</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="#redirectrelative">RedirectRelative</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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_alias">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;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>
</ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="section">
<h2 id="order">Order of Processing <a title="Permanent link" href="#order" class="permalink">&para;</a></h2>

    <p>Aliases and Redirects occurring in different contexts are processed
    like other directives according to standard <a href="../sections.html#merging">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">&lt;VirtualHost&gt;</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">&lt;Location&gt;</a></code>
    or <code class="directive"><a href="../mod/core.html#locationmatch">&lt;LocationMatch&gt;</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 id="alias"><span id="Alias">Alias</span> Directive <a title="Permanent link" href="#alias" class="permalink">&para;</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</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">&lt;Directory&gt;</a></code> sections which
    cover the <em>destination</em> of aliases.  Aliasing occurs before
    <code class="directive"><a href="../mod/core.html#directory">&lt;Directory&gt;</a></code> sections
    are checked, so only the destination of aliases are affected.
    (Note however <code class="directive"><a href="../mod/core.html#location">&lt;Location&gt;</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"
&lt;Directory "/ftp/pub/image"&gt;
    Require all granted
&lt;/Directory&gt;</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">&lt;Location&gt;</a></code>
    or <code class="directive"><a href="../mod/core.html#locationmatch">&lt;LocationMatch&gt;</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">&lt;Location "/image"&gt;
    Alias "/ftp/pub/image"
&lt;/Location&gt;
&lt;LocationMatch "/error/(?&lt;NUMBER&gt;[0-9]+)"&gt;
    Alias "/usr/local/apache/errors/%{env:MATCH_NUMBER}.html"
&lt;/LocationMatch&gt;</pre>


    <p>Note that when the <code class="directive">AliasPreservePath</code>
    directive is on, the full path is mapped to the destination. When
    the directive is off, all URLs are mapped to the single target
    URL.</p>

    <pre class="prettyprint lang-config"># /files/foo and /files/bar mapped to /ftp/pub/files/foo and /ftp/pub/files/bar
&lt;Location "/files"&gt;
    AliasPreservePath on
    Alias "/ftp/pub/files"
&lt;/Location&gt;
# /errors/foo and /errors/bar mapped to /var/www/errors.html
&lt;Location "/errors"&gt;
    AliasPreservePath off
    Alias "/var/www/errors.html"
&lt;/Location&gt;</pre>



</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="directive-section"><h2 id="aliasmatch"><span id="AliasMatch">AliasMatch</span> Directive <a title="Permanent link" href="#aliasmatch" class="permalink">&para;</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">AliasMatch</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">AliasMatch</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">AliasMatch</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">AliasMatch</code>
    where <code class="directive"><a href="#alias">Alias</a></code> would
    work.  <code class="directive">AliasMatch</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 id="aliaspreservepath"><span id="AliasPreservePath">AliasPreservePath</span> Directive <a title="Permanent link" href="#aliaspreservepath" class="permalink">&para;</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Map the full path after the alias in a location.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AliasPreservePath OFF|ON</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AliasPreservePath 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_alias</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.58 and later</td></tr>
</table>
    <p>When using the two parameter version of the
    <code class="directive">Alias</code> directive, the full path after the alias
    is preserved. When using the one parameter version of the
    <code class="directive">Alias</code> directive inside a
    <code class="directive">Location</code> directive, the full path is dropped,
    and all URLs are mapped to the target expression.</p>

    <p>To make the one parameter version of the
    <code class="directive">Alias</code> directive preserve paths in the same way
    that the two parameter version of the <code class="directive">Alias</code>
    directive, enable this setting.</p>


</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="directive-section"><h2 id="redirect"><span id="Redirect">Redirect</span> Directive <a title="Permanent link" href="#redirect" class="permalink">&para;</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&amp;a=42</code>,
    it will be redirected to
    <code>http://foo2.example.com/service/foo.pl?q=23&amp;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">&lt;Location&gt;</a></code>
    or <code class="directive"><a href="../mod/core.html#locationmatch">&lt;LocationMatch&gt;</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">&lt;Location "/one"&gt;
    Redirect permanent "http://example.com/two"
&lt;/Location&gt;
&lt;Location "/three"&gt;
    Redirect 303 "http://example.com/other"
&lt;/Location&gt;
&lt;LocationMatch "/error/(?&lt;NUMBER&gt;[0-9]+)"&gt;
    Redirect permanent "http://example.com/errors/%{env:MATCH_NUMBER}.html"
&lt;/LocationMatch&gt;</pre>



</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="directive-section"><h2 id="redirectmatch"><span id="RedirectMatch">RedirectMatch</span> Directive <a title="Permanent link" href="#redirectmatch" class="permalink">&para;</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">RedirectMatch</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 id="redirectpermanent"><span id="RedirectPermanent">RedirectPermanent</span> Directive <a title="Permanent link" href="#redirectpermanent" class="permalink">&para;</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 id="redirectrelative"><span id="RedirectRelative">RedirectRelative</span> Directive <a title="Permanent link" href="#redirectrelative" class="permalink">&para;</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allows relative redirect targets.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RedirectRelative On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>RedirectRelative 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_alias</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>2.4.58 and later</td></tr>
</table>
    <p>By default, if the target URL of a <code class="directive"><a href="#redirect">Redirect</a></code>
    directive is a relative URL beginning with a '/' character, the server 
    converts it to an absolute URL before responding to the client. By
    setting <code class="directive">RedirectRelative</code> to the value "On",
    the relative URL is presented to the client directly.</p>


</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif"></a></div>
<div class="directive-section"><h2 id="redirecttemp"><span id="RedirectTemp">RedirectTemp</span> Directive <a title="Permanent link" href="#redirecttemp" class="permalink">&para;</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 id="scriptalias"><span id="ScriptAlias">ScriptAlias</span> Directive <a title="Permanent link" href="#scriptalias" class="permalink">&para;</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/"
&lt;Location "/cgi-bin"&gt;
    SetHandler cgi-script
    Options +ExecCGI
&lt;/Location&gt;</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">&lt;Directory&gt;</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">&lt;Directory "/usr/local/apache2/htdocs/cgi-bin"&gt;
    SetHandler cgi-script
    Options ExecCGI
&lt;/Directory&gt;</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">&lt;Location&gt;</a></code>
    or <code class="directive"><a href="../mod/core.html#locationmatch">&lt;LocationMatch&gt;</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">&lt;Location "/cgi-bin"&gt;
    ScriptAlias "/web/cgi-bin/"
&lt;/Location&gt;
&lt;LocationMatch "/cgi-bin/errors/(?&lt;NUMBER&gt;[0-9]+)"&gt;
    ScriptAlias "/web/cgi-bin/errors/%{env:MATCH_NUMBER}.cgi"
&lt;/LocationMatch&gt;</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 id="scriptaliasmatch"><span id="ScriptAliasMatch">ScriptAliasMatch</span> Directive <a title="Permanent link" href="#scriptaliasmatch" class="permalink">&para;</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">ScriptAliasMatch</code>.
    See <code class="directive"><a href="#aliasmatch">AliasMatch</a></code> for
    details.</p>


</div>
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