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<div id="page-content"><div id="preamble"><h1>Apache模块 mod_imagemap</h1>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="module">
<tr><th><a href="module-dict.html#Description">说明</a></th><td>处理服务器端图像映射</td></tr>
<tr><th><a href="module-dict.html#Status">状态</a></th><td>基本(B)</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">模块名</a></th><td>imagemap_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">源文件</a></th><td>mod_imagemap.c</td></tr>
</table>
<h3>概述</h3>
<p>This module processes <code>.map</code> files, thereby
replacing the functionality of the <code>imagemap</code> CGI
program. Any directory or document type configured to use the
handler <code>imap-file</code> (using either
<code class="directive"><a href="../mod/mod_mime.html#addhandler">AddHandler</a></code>或<code class="directive"><a href="../mod/core.html#sethandler">SetHandler</a></code>)
will be processed by this module.</p>
<p>The following directive will activate files ending with
<code>.map</code> as imagemap files:</p>
<div class="example"><p><code>AddHandler imap-file map</code></p></div>
<p>Note that the following is still supported:</p>
<div class="example"><p><code>AddType application/x-httpd-imap map</code></p></div>
<p>However, we are trying to phase out "magic MIME types" so we
are deprecating this method.</p>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="features" id="features">New Features</a></h2>
<p>The imagemap module adds some new features that were not
possible with previously distributed imagemap programs.</p>
<ul>
<li>URL references relative to the Referer: information.</li>
<li>Default <code><base></code> assignment through a new map
directive <code>base</code>.</li>
<li>No need for <code>imagemap.conf</code> file.</li>
<li>Point references.</li>
<li>Configurable generation of imagemap menus.</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="imapfile" id="imapfile">Imagemap File</a></h2>
<p>The lines in the imagemap files can have one of several
formats:</p>
<div class="example"><p><code>
directive value [<var>x</var>, <var>y</var> ...]<br />
directive value "<var>Menu text</var>" [<var>x</var>, <var>y</var>
...]<br />
directive value <var>x</var>, <var>y</var> ... "<var>Menu text</var>"
</code></p></div>
<p>The directive is one of <code>base</code>, <code>default</code>, <code>poly</code>, <code>circle</code>, <code>rect</code>, or <code>point</code>. The value is an
absolute or relative URL, or one of the special values listed
below. The coordinates are <code><var>x</var>, <var>y</var></code>
pairs separated by whitespace. The quoted text is used as the text of
the link if a imagemap menu is generated. Lines beginning with '#' are
comments.</p>
<h3><a name="imapfile.directives" id="imapfile.directives">Imagemap File Directives</a></h3>
<p>There are six directives allowed in the imagemap file. The
directives can come in any order, but are processed in the
order they are found in the imagemap file.</p>
<dl>
<dt><code>base</code> Directive</dt>
<dd><p>Has the effect of <code><base href="<var>value</var>">
</code>. The non-absolute URLs of the map-file are taken relative
to this value. The <code>base</code> directive overrides
<code class="directive"><a href="#imapbase">ImapBase</a></code> as set in a
<code>.htaccess</code> file or in the server configuration files.
In the absence of an <code class="directive">ImapBase</code> configuration
directive, <code>base</code> defaults to
<code>http://server_name/</code>.</p>
<p><code>base_uri</code> is synonymous with <code>base</code>.
Note that a trailing slash on the URL is significant.</p></dd>
<dt><code>default</code> Directive</dt>
<dd>The action taken if the coordinates given do not fit any
of the <code>poly</code>, <code>circle</code>或<code>rect</code> directives, and there are no
<code>point</code> directives. Defaults to <code>nocontent</code>
in the absence of an <code class="directive"><a href="#imapdefault">ImapDefault</a></code> configuration setting, causing a status
code of <code>204 No Content</code> to be returned. The client
should keep the same page displayed.</dd>
<dt><code>poly</code> Directive</dt>
<dd>Takes three to one-hundred points, and is obeyed if the
user selected coordinates fall within the polygon defined by
these points.</dd>
<dt><code>circle</code></dt>
<dd>Takes the center coordinates of a circle and a point on
the circle. Is obeyed if the user selected point is with the
circle.</dd>
<dt><code>rect</code> Directive</dt>
<dd>Takes the coordinates of two opposing corners of a
rectangle. Obeyed if the point selected is within this
rectangle.</dd>
<dt><code>point</code> Directive</dt>
<dd>Takes a single point. The point directive closest to the
user selected point is obeyed if no other directives are
satisfied. Note that <code>default</code> will not be
followed if a <code>point</code> directive is present and
valid coordinates are given.</dd>
</dl>
<h3><a name="imapfile.values" id="imapfile.values">Values</a></h3>
<p>The values for each of the directives can any of the following:</p>
<dl>
<dt>a URL</dt>
<dd><p>The URL can be relative or absolute URL. Relative URLs
can contain '..' syntax and will be resolved relative to the
<code>base</code> value.</p>
<p><code>base</code> itself will not resolved according to the
current value. A statement <code>base mailto:</code> will
work properly, though.</p></dd>
<dt><code>map</code></dt>
<dd>Equivalent to the URL of the imagemap file itself. No
coordinates are sent with this, so a menu will be generated
unless <code class="directive"><a href="#imapmenu">ImapMenu</a></code> is set to
<code>none</code>.</dd>
<dt><code>menu</code></dt>
<dd>Synonymous with <code>map</code>.</dd>
<dt><code>referer</code></dt>
<dd>Equivalent to the URL of the referring document. Defaults
to <code>http://servername/</code> if no <code>Referer:</code>
header was present.</dd>
<dt><code>nocontent</code></dt>
<dd>Sends a status code of <code>204 No Content</code>,
telling the client to keep the same page displayed. Valid for
all but <code>base</code>.</dd>
<dt><code>error</code></dt>
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