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-<title>mod_negotiation - Apache HTTP Server</title>
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-<p class="apache">Apache HTTP Server Version 2.3</p>
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<div id="page-content">
<div id="preamble"><h1>Apache Module mod_negotiation</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_negotiation.html" title="English"> en </a> |
+<a href="../fr/mod/mod_negotiation.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_negotiation.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Provides for <a href="../content-negotiation.html">content negotiation</a></td></tr>
<code>type-map</code>) which explicitly lists the files
containing the variants.</li>
- <li>A MultiViews search (enabled by the <code>MultiViews</code>
+ <li>A Multiviews search (enabled by the <code>Multiviews</code>
<code class="directive"><a href="../mod/core.html#options">Options</a></code>), where the server does
an implicit filename pattern match, and choose from amongst the
results.</li>
</ul>
</div>
-<div id="quickview"><h3 class="directives">Directives</h3>
+<div id="quickview"><h3>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#typemaps">Type maps</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#multiviews">Multiviews</a></li>
+</ul><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#cachenegotiateddocs">CacheNegotiatedDocs</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#forcelanguagepriority">ForceLanguagePriority</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#languagepriority">LanguagePriority</a></li>
</ul>
-<h3>Topics</h3>
-<ul id="topics">
-<li><img alt="" src="../images/down.gif" /> <a href="#typemaps">Type maps</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#multiviews">MultiViews</a></li>
-</ul><h3>See also</h3>
+<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_negotiation">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_negotiation">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="directive"><a href="../mod/core.html#options">Options</a></code></li>
<li><code class="module"><a href="../mod/mod_mime.html">mod_mime</a></code></li>
<li><a href="../content-negotiation.html">Content
Negotiation</a></li>
<li><a href="../env.html">Environment Variables</a></li>
-</ul></div>
+<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="typemaps" id="typemaps">Type maps</a></h2>
0.</dd>
<dt><code>qs</code></dt>
- <dd>a floating-point number with a value in the range 0.0
- to 1.0, indicating the relative 'quality' of this variant
+ <dd>a floating-point number with a value in the range 0[.000]
+ to 1[.000], indicating the relative 'quality' of this variant
compared to the other available variants, independent of
the client's capabilities. For example, a jpeg file is
usually of higher source quality than an ascii file if it
<dd>uri of the file containing the variant (of the given
media type, encoded with the given content encoding). These
are interpreted as URLs relative to the map file; they must
- be on the same server (!), and they must refer to files to
+ be on the same server, and they must refer to files to
which the client would be granted access if they were to be
requested directly.</dd>
<dt><code>Body:</code></dt>
- <dd>New in Apache 2.0, the actual content of the resource may
+ <dd>The actual content of the resource may
be included in the type-map file using the Body header. This
header must contain a string that designates a delimiter for
the body content. Then all following lines in the type map
</code></p></div>
</dd>
</dl>
+
+ <p>Consider, for example, a resource called
+ <code>document.html</code> which is available in English, French,
+ and German. The files for each of these are called
+ <code>document.html.en</code>, <code>document.html.fr</code>, and
+ <code>document.html.de</code>, respectively. The type map file will
+ be called <code>document.html.var</code>, and will contain the
+ following:</p>
+
+ <div class="example"><p><code>
+ URI: document.html<br />
+ <br />
+ Content-language: en<br />
+ Content-type: text/html<br />
+ URI: document.html.en<br />
+ <br />
+ Content-language: fr<br />
+ Content-type: text/html<br />
+ URI: document.html.fr<br />
+ <br />
+ Content-language: de<br />
+ Content-type: text/html<br />
+ URI: document.html.de<br />
+ <br />
+
+ </code></p></div>
+
+ <p>All four of these files should be placed in the same directory,
+ and the <code>.var</code> file should be associated with the
+ <code>type-map</code> handler with an <code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code> directive:</p>
+
+ <pre class="prettyprint lang-config">AddHandler type-map .var</pre>
+
+
+ <p>A request for <code>document.html.var</code> in this directory will
+ result in choosing the variant which most closely matches the language preference
+ specified in the user's <code>Accept-Language</code> request
+ header.</p>
+
+ <p>If <code>Multiviews</code> is enabled, and <code class="directive"><a href="../mod/mod_mime.html#multiviewsmatch">MultiviewsMatch</a></code> is set to "handlers" or "any", a request to
+ <code>document.html</code> will discover <code>document.html.var</code> and
+ continue negotiating with the explicit type map.</p>
+
+ <p>Other configuration directives, such as <code class="directive"><a href="../mod/mod_alias.html#alias">Alias</a></code> can be used to map <code>document.html</code> to
+ <code>document.html.var</code>.</p>
+
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
-<h2><a name="multiviews" id="multiviews">MultiViews</a></h2>
- <p>A MultiViews search is enabled by the <code>MultiViews</code>
+<h2><a name="multiviews" id="multiviews">Multiviews</a></h2>
+ <p>A Multiviews search is enabled by the <code>Multiviews</code>
<code class="directive"><a href="../mod/core.html#options">Options</a></code>. If the server receives a
request for <code>/some/dir/foo</code> and
<code>/some/dir/foo</code> does <em>not</em> exist, then the
of them by name. It then chooses the best match to the client's
requirements, and returns that document.</p>
- <p>The <code class="directive"><a href="../mod/mod_mime.html#multiviewsmatch">MultiViewsMatch</a></code>
+ <p>The <code class="directive"><a href="../mod/mod_mime.html#multiviewsmatch">MultiviewsMatch</a></code>
directive configures whether Apache will consider files
that do not have content negotiation meta-information assigned
to them when choosing files.</p>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="CacheNegotiatedDocs" id="CacheNegotiatedDocs">CacheNegotiatedDocs</a> <a name="cachenegotiateddocs" id="cachenegotiateddocs">Directive</a></h2>
<table class="directive">
-<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allows content-negotiated documents to be
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allows content-negotiated documents to be
cached by proxy servers</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheNegotiatedDocs On|Off</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheNegotiatedDocs Off</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_negotiation</td></tr>
-<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>The syntax changed in version 2.0.</td></tr>
</table>
<p>If set, this directive allows content-negotiated documents
to be cached by proxy servers. This could mean that clients
the caching of negotiated documents, and this directive has no
effect in responses to HTTP/1.1 requests.</p>
- <p>Prior to version 2.0,
- <code class="directive">CacheNegotiatedDocs</code> did not take an
- argument; it was turned on by the presence of the directive by
- itself.</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="ForceLanguagePriority" id="ForceLanguagePriority">ForceLanguagePriority</a> <a name="forcelanguagepriority" id="forcelanguagepriority">Directive</a></h2>
<table class="directive">
-<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Action to take if a single acceptable document is not
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Action to take if a single acceptable document is not
found</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ForceLanguagePriority None|Prefer|Fallback [Prefer|Fallback]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ForceLanguagePriority Prefer</code></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_negotiation</td></tr>
-<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.0.30 and later</td></tr>
</table>
<p>The <code class="directive">ForceLanguagePriority</code> directive uses
the given <code class="directive"><a href="#languagepriority">LanguagePriority</a></code> to satisfy
- negotation where the server could otherwise not return a single
+ negotiation where the server could otherwise not return a single
matching document.</p>
<p><code>ForceLanguagePriority Prefer</code> uses
(equally acceptable) then the first matching variant, <code>en</code>,
will be served.</p>
- <div class="example"><p><code>
- LanguagePriority en fr de<br />
- ForceLanguagePriority Prefer
- </code></p></div>
+ <pre class="prettyprint lang-config">LanguagePriority en fr de
+ForceLanguagePriority Prefer</pre>
+
<p><code>ForceLanguagePriority Fallback</code> uses
<code class="directive"><a href="#languagepriority">LanguagePriority</a></code> to
language response, but such a variant isn't found, then the first
variant from the <code class="directive"><a href="#languagepriority">LanguagePriority</a></code> list below will be served.</p>
- <div class="example"><p><code>
- LanguagePriority en fr de<br />
- ForceLanguagePriority Fallback
- </code></p></div>
+ <pre class="prettyprint lang-config">LanguagePriority en fr de
+ForceLanguagePriority Fallback</pre>
+
<p>Both options, <code>Prefer</code> and <code>Fallback</code>, may be
specified, so either the first matching variant from <code class="directive"><a href="#languagepriority">LanguagePriority</a></code> will be served if
</table>
<p>The <code class="directive">LanguagePriority</code> sets the precedence
of language variants for the case where the client does not
- express a preference, when handling a MultiViews request. The list
+ express a preference, when handling a Multiviews request. The list
of <var>MIME-lang</var> are in order of decreasing preference.</p>
- <div class="example"><h3>Example:</h3><p><code>
- LanguagePriority en fr de
- </code></p></div>
+ <pre class="prettyprint lang-config">LanguagePriority en fr de</pre>
+
<p>For a request for <code>foo.html</code>, where
<code>foo.html.fr</code> and <code>foo.html.de</code> both
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_negotiation.html" title="English"> en </a> |
+<a href="../fr/mod/mod_negotiation.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
<a href="../ja/mod/mod_negotiation.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
-</div><div id="footer">
-<p class="apache">Copyright 2006 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>
+</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 again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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