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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_mime_magic.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.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_mime_magic.html.en')
| -rw-r--r-- | docs/manual/mod/mod_mime_magic.html.en | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_mime_magic.html.en b/docs/manual/mod/mod_mime_magic.html.en new file mode 100644 index 0000000..25422e8 --- /dev/null +++ b/docs/manual/mod/mod_mime_magic.html.en @@ -0,0 +1,304 @@ +<?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_mime_magic - 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_mime_magic</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_mime_magic.html" title="English"> en </a> | +<a href="../fr/mod/mod_mime_magic.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Determines the MIME type of a file + by looking at a few bytes of its contents</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>mime_magic_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_mime_magic.c</td></tr></table> +<h3>Summary</h3> + + <p>This module determines the <a class="glossarylink" href="../glossary.html#mime-type" title="see glossary">MIME + type</a> of files in the same way the Unix + <code>file(1)</code> command works: it looks at the first few + bytes of the file. It is intended as a "second line of defense" + for cases that <code class="module"><a href="../mod/mod_mime.html">mod_mime</a></code> can't resolve.</p> + + <p>This module is derived from a free version of the + <code>file(1)</code> command for Unix, which uses "magic + numbers" and other hints from a file's contents to figure out + what the contents are. This module is active only if the magic + file is specified by the <code class="directive"><a href="#mimemagicfile">MimeMagicFile</a></code> directive.</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="#format">Format of the Magic File</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#performance">Performance Issues</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#notes">Notes</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#mimemagicfile">MimeMagicFile</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_mime_magic">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_mime_magic">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><a href="#comments_section">Comments</a></li></ul></div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="format" id="format">Format of the Magic File</a></h2> + + <p>The contents of the file are plain ASCII text in 4-5 + columns. Blank lines are allowed but ignored. Commented lines + use a hash mark (<code>#</code>). The remaining lines are parsed for + the following columns:</p> + + <table class="bordered"><tr class="header"><th>Column</th><th>Description</th></tr> +<tr><td>1</td> + <td>byte number to begin checking from<br /> + "<code>></code>" indicates a dependency upon the previous + non-"<code>></code>" line</td></tr> +<tr class="odd"><td>2</td> + <td><p>type of data to match</p> + <table class="bordered"> + + <tr><td><code>byte</code></td> + <td>single character</td></tr> + <tr><td><code>short</code></td> + <td>machine-order 16-bit integer</td></tr> + <tr><td><code>long</code></td> + <td>machine-order 32-bit integer</td></tr> + <tr><td><code>string</code></td> + <td>arbitrary-length string</td></tr> + <tr><td><code>date</code></td> + <td>long integer date (seconds since Unix epoch/1970)</td></tr> + <tr><td><code>beshort</code></td> + <td>big-endian 16-bit integer</td></tr> + <tr><td><code>belong</code></td> + <td>big-endian 32-bit integer</td></tr> + <tr><td><code>bedate</code></td> + <td>big-endian 32-bit integer date</td></tr> + <tr><td><code>leshort</code></td> + <td>little-endian 16-bit integer</td></tr> + <tr><td><code>lelong</code></td> + <td>little-endian 32-bit integer</td></tr> + <tr><td><code>ledate</code></td> + <td>little-endian 32-bit integer date</td></tr> + </table></td></tr> +<tr><td>3</td> + <td>contents of data to match</td></tr> +<tr class="odd"><td>4</td> + <td>MIME type if matched</td></tr> +<tr><td>5</td> + <td>MIME encoding if matched (optional)</td></tr> +</table> + + <p>For example, the following magic file lines would recognize + some audio formats:</p> + + <div class="example"><pre># Sun/NeXT audio data +0 string .snd +>12 belong 1 audio/basic +>12 belong 2 audio/basic +>12 belong 3 audio/basic +>12 belong 4 audio/basic +>12 belong 5 audio/basic +>12 belong 6 audio/basic +>12 belong 7 audio/basic +>12 belong 23 audio/x-adpcm</pre></div> + + <p>Or these would recognize the difference between <code>*.doc</code> + files containing Microsoft Word or FrameMaker documents. (These are + incompatible file formats which use the same file suffix.)</p> + + <div class="example"><pre># Frame +0 string \<MakerFile application/x-frame +0 string \<MIFFile application/x-frame +0 string \<MakerDictionary application/x-frame +0 string \<MakerScreenFon application/x-frame +0 string \<MML application/x-frame +0 string \<Book application/x-frame +0 string \<Maker application/x-frame + +# MS-Word +0 string \376\067\0\043 application/msword +0 string \320\317\021\340\241\261 application/msword +0 string \333\245-\0\0\0 application/msword</pre></div> + + <p>An optional MIME encoding can be included as a fifth column. + For example, this can recognize gzipped files and set the + encoding for them.</p> + + <div class="example"><pre># gzip (GNU zip, not to be confused with +# [Info-ZIP/PKWARE] zip archiver) + +0 string \037\213 application/octet-stream x-gzip</pre></div> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="performance" id="performance">Performance Issues</a></h2> + <p>This module is not for every system. If your system is barely + keeping up with its load or if you're performing a web server + benchmark, you may not want to enable this because the + processing is not free.</p> + + <p>However, an effort was made to improve the performance of + the original <code>file(1)</code> code to make it fit in a busy web + server. It was designed for a server where there are thousands of users + who publish their own documents. This is probably very common + on intranets. Many times, it's helpful if the server can make + more intelligent decisions about a file's contents than the + file name allows ...even if just to reduce the "why doesn't my + page work" calls when users improperly name their own files. + You have to decide if the extra work suits your + environment.</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="notes" id="notes">Notes</a></h2> + <p>The following notes apply to the <code class="module"><a href="../mod/mod_mime_magic.html">mod_mime_magic</a></code> + module and are included here for compliance with contributors' + copyright restrictions that require their acknowledgment.</p> + + <div class="note"> + <p>mod_mime_magic: MIME type lookup via file magic numbers<br /> + Copyright (c) 1996-1997 Cisco Systems, Inc.</p> + + <p>This software was submitted by Cisco Systems to the Apache Group + in July 1997. Future revisions and derivatives of this source code + must acknowledge Cisco Systems as the original contributor of this + module. All other licensing and usage conditions are those of the + Apache Group.</p> + + <p>Some of this code is derived from the free version of the file + command originally posted to comp.sources.unix. Copyright info for + that program is included below as required.</p> + </div> + + <div class="note"> + <p> - Copyright (c) Ian F. Darwin, 1987. Written by Ian F. Darwin.</p> + + <p>This software is not subject to any license of the American + Telephone and Telegraph Company or of the Regents of the University + of California.</p> + + <p>Permission is granted to anyone to use this software for any + purpose on any computer system, and to alter it and redistribute it + freely, subject to the following restrictions:</p> + + <ol> + <li>The author is not responsible for the consequences of use of + this software, no matter how awful, even if they arise from flaws + in it.</li> + + <li>The origin of this software must not be misrepresented, either + by explicit claim or by omission. Since few users ever read + sources, credits must appear in the documentation.</li> + + <li>Altered versions must be plainly marked as such, and must not + be misrepresented as being the original software. Since few users + ever read sources, credits must appear in the documentation.</li> + + <li>This notice may not be removed or altered.</li> + </ol> + </div> + + <div class="note"> + <p>For compliance with Mr Darwin's terms: this has been very + significantly modified from the free "file" command.</p> + + <ul> + <li>all-in-one file for compilation convenience when moving from + one version of Apache to the next.</li> + + <li>Memory allocation is done through the Apache API's pool + structure.</li> + + <li>All functions have had necessary Apache API request or server + structures passed to them where necessary to call other Apache API + routines. (<em>i.e.</em>, usually for logging, files, or memory + allocation in itself or a called function.)</li> + + <li>struct magic has been converted from an array to a single-ended + linked list because it only grows one record at a time, it's only + accessed sequentially, and the Apache API has no equivalent of + <code>realloc()</code>.</li> + + <li>Functions have been changed to get their parameters from the + server configuration instead of globals. (It should be reentrant + now but has not been tested in a threaded environment.)</li> + + <li>Places where it used to print results to stdout now saves them + in a list where they're used to set the MIME type in the Apache + request record.</li> + + <li>Command-line flags have been removed since they will never be + used here.</li> + </ul> + </div> +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MimeMagicFile" id="MimeMagicFile">MimeMagicFile</a> <a name="mimemagicfile" id="mimemagicfile">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable MIME-type determination based on file contents +using the specified magic file</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MimeMagicFile <var>file-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>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_mime_magic</td></tr> +</table> + <p>The <code class="directive">MimeMagicFile</code> directive can be used to + enable this module, the default file is distributed at + <code>conf/magic</code>. Non-rooted paths are relative to the + <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>. Virtual hosts will use + the same file as the main server unless a more specific setting is + used, in which case the more specific setting overrides the main + server's file.</p> + + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MimeMagicFile conf/magic</pre> +</div> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_mime_magic.html" title="English"> en </a> | +<a href="../fr/mod/mod_mime_magic.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_mime_magic.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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