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<title>mod_cache - Apache HTTP Server</title>
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<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>
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<p class="apache">Apache HTTP Server Version 2.2</p>
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<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 2.2</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_cache</h1>
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<p><span>Available Languages: </span><a href="../en/mod/mod_cache.html" title="English"> en </a> |
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<a href="../ja/mod/mod_cache.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_cache.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Content cache keyed to URIs.</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>cache_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_cache.c</td></tr></table>
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<div class="warning">This module should be used with care and
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can be used to circumvent <code class="directive"><a href="../mod/mod_authz_host.html#allow">Allow</a></code> and <code class="directive"><a href="../mod/mod_authz_host.html#deny">Deny</a></code> directives. You
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should not enable caching for any content to which you wish
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to limit access by client host name, address or environment
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<p><code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> implements an <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC 2616</a> compliant HTTP
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content cache that can be used to cache either local or proxied content.
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<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> requires the services of one or more storage
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management modules. Two storage management modules are included in
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the base Apache distribution:</p>
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<dt><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code></dt>
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<dd>implements a disk based storage manager.</dd>
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<dt><code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code></dt>
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<dd>implements a memory based storage manager.
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<code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code> can be configured to operate in two
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modes: caching open file descriptors or caching objects in heap storage.
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<code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code> can be used to cache locally generated content
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or to cache backend server content for <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> when
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configured using <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code>
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(aka <dfn>reverse proxy</dfn>)</dd>
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<p>Content is stored in and retrieved from the cache using URI based keys. Content with
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access protection is not cached.</p>
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<p>Further details, discussion, and examples, are provided in the
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<a href="../caching.html">Caching Guide</a>.</p>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachedefaultexpire">CacheDefaultExpire</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachedisable">CacheDisable</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cacheenable">CacheEnable</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cacheignorecachecontrol">CacheIgnoreCacheControl</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cacheignoreheaders">CacheIgnoreHeaders</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cacheignorenolastmod">CacheIgnoreNoLastMod</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachelastmodifiedfactor">CacheLastModifiedFactor</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachemaxexpire">CacheMaxExpire</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachestorenostore">CacheStoreNoStore</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#cachestoreprivate">CacheStorePrivate</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#related">Related Modules and Directives</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#sampleconf">Sample Configuration</a></li>
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</ul><h3>See also</h3>
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<li><a href="../caching.html">Caching Guide</a></li>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<h2><a name="related" id="related">Related Modules and Directives</a></h2>
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<table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td><ul><li><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code></li><li><code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code></li></ul></td><td><ul><li><code class="directive"><a href="../mod/mod_disk_cache.html#cacheroot">CacheRoot</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachedirlevels">CacheDirLevels</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachedirlength">CacheDirLength</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cacheminfilesize">CacheMinFileSize</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachemaxfilesize">CacheMaxFileSize</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcachesize">MCacheSize</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcachemaxobjectcount">MCacheMaxObjectCount</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcacheminobjectsize">MCacheMinObjectSize</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcachemaxobjectsize">MCacheMaxObjectSize</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcacheremovalalgorithm">MCacheRemovalAlgorithm</a></code></li><li><code class="directive"><a href="../mod/mod_mem_cache.html#mcachemaxstreamingbuffer">MCacheMaxStreamingBuffer</a></code></li></ul></td></tr></table>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<h2><a name="sampleconf" id="sampleconf">Sample Configuration</a></h2>
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<div class="example"><h3>Sample httpd.conf</h3><p><code>
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# Sample Cache Configuration<br />
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LoadModule cache_module modules/mod_cache.so<br />
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<IfModule mod_cache.c><br />
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#LoadModule disk_cache_module modules/mod_disk_cache.so<br />
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# If you want to use mod_disk_cache instead of mod_mem_cache,<br />
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# uncomment the line above and comment out the LoadModule line below.<br />
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<IfModule mod_disk_cache.c><br />
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<span class="indent">
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CacheRoot c:/cacheroot<br />
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CacheEnable disk /<br />
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CacheDirLevels 5<br />
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CacheDirLength 3<br />
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</IfModule> <br />
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LoadModule mem_cache_module modules/mod_mem_cache.so<br />
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<IfModule mod_mem_cache.c><br />
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<span class="indent">
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CacheEnable mem /<br />
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MCacheSize 4096<br />
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MCacheMaxObjectCount 100<br />
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MCacheMinObjectSize 1<br />
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MCacheMaxObjectSize 2048<br />
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</IfModule><br />
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# When acting as a proxy, don't cache the list of security updates<br />
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CacheDisable http://security.update.server/update-list/<br />
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheDefaultExpire" id="CacheDefaultExpire">CacheDefaultExpire</a> <a name="cachedefaultexpire" id="cachedefaultexpire">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The default duration to cache a document when no expiry date is specified.</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDefaultExpire <var>seconds</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheDefaultExpire 3600 (one hour)</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>The <code class="directive">CacheDefaultExpire</code> directive specifies a default time,
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in seconds, to cache a document if neither an expiry date nor last-modified date are provided
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with the document. The value specified with the <code class="directive">CacheMaxExpire</code>
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directive does <em>not</em> override this setting.</p>
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<div class="example"><p><code>
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CacheDefaultExpire 86400
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheDisable" id="CacheDisable">CacheDisable</a> <a name="cachedisable" id="cachedisable">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Disable caching of specified URLs</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDisable <var> url-string</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>The <code class="directive">CacheDisable</code> directive instructs
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<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to <em>not</em> cache urls at or below
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<var>url-string</var>.</p>
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<div class="example"><h3>Example</h3><p><code>
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CacheDisable /local_files
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheEnable" id="CacheEnable">CacheEnable</a> <a name="cacheenable" id="cacheenable">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable caching of specified URLs using a specified storage
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheEnable <var>cache_type</var> <var>url-string</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>The <code class="directive">CacheEnable</code> directive instructs
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<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to cache urls at or below
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<var>url-string</var>. The cache storage manager is specified with the
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<var>cache_type</var> argument. <var>cache_type</var> <code> mem</code>
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instructs <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the memory based storage
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manager implemented by <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>.
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<var>cache_type</var> <code>disk</code> instructs
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<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the disk based storage manager
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implemented by <code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code>.
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<var>cache_type</var> <code>fd</code> instructs
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<code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the file descriptor cache implemented
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by <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>.</p>
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<p>In the event that the URL space overlaps between different
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<code class="directive">CacheEnable</code> directives (as in the example below),
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each possible storage manager will be run until the first one that
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actually processes the request. The order in which the storage managers are
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run is determined by the order of the <code class="directive">CacheEnable</code>
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directives in the configuration file.</p>
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<div class="example"><p><code>
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CacheEnable mem /manual<br />
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CacheEnable fd /images<br />
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CacheEnable disk /<br />
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<p>When acting as a forward proxy server, <var>url-string</var> can
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also be used to specify remote sites and proxy protocols which
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caching should be enabled for.</p>
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<div class="example"><p><code>
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# Cache proxied url's<br />
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CacheEnable disk /<br /><br />
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# Cache FTP-proxied url's<br />
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CacheEnable disk ftp://<br /><br />
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# Cache content from www.apache.org<br />
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CacheEnable disk http://www.apache.org/<br />
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheIgnoreCacheControl" id="CacheIgnoreCacheControl">CacheIgnoreCacheControl</a> <a name="cacheignorecachecontrol" id="cacheignorecachecontrol">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Ignore request to not serve cached content to client</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheIgnoreCacheControl On|Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreCacheControl Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>Ordinarily, requests containing a Cache-Control: no-cache or
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Pragma: no-cache header value will not be served from the cache. The
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<code class="directive">CacheIgnoreCacheControl</code> directive allows this
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behavior to be overridden. <code class="directive">CacheIgnoreCacheControl</code>
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On tells the server to attempt to serve the resource from the cache even
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if the request contains no-cache header values. Resources requiring
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authorization will <em>never</em> be cached.</p>
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<div class="example"><p><code>
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CacheIgnoreCacheControl On
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<div class="warning"><h3>Warning:</h3>
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This directive will allow serving from the cache even if the client has
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requested that the document not be served from the cache. This might
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result in stale content being served.
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<li><code class="directive"><a href="#cachestoreprivate">CacheStorePrivate</a></code></li>
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<li><code class="directive"><a href="#cachestorenostore">CacheStoreNoStore</a></code></li>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheIgnoreHeaders" id="CacheIgnoreHeaders">CacheIgnoreHeaders</a> <a name="cacheignoreheaders" id="cacheignoreheaders">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Do not store the given HTTP header(s) in the cache.
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheIgnoreHeaders <var>header-string</var> [<var>header-string</var>] ...</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreHeaders None</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>According to RFC 2616, hop-by-hop HTTP headers are not stored in
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the cache. The following HTTP headers are hop-by-hop headers and thus
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do not get stored in the cache in <em>any</em> case regardless of the
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setting of <code class="directive">CacheIgnoreHeaders</code>:</p>
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<li><code>Connection</code></li>
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<li><code>Keep-Alive</code></li>
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<li><code>Proxy-Authenticate</code></li>
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<li><code>Proxy-Authorization</code></li>
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<li><code>TE</code></li>
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<li><code>Trailers</code></li>
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<li><code>Transfer-Encoding</code></li>
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<li><code>Upgrade</code></li>
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<p><code class="directive">CacheIgnoreHeaders</code> specifies additional HTTP
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headers that should not to be stored in the cache. For example, it makes
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sense in some cases to prevent cookies from being stored in the cache.</p>
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<p><code class="directive">CacheIgnoreHeaders</code> takes a space separated list
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of HTTP headers that should not be stored in the cache. If only hop-by-hop
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headers not should be stored in the cache (the RFC 2616 compliant
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behaviour), <code class="directive">CacheIgnoreHeaders</code> can be set to
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<code>None</code>.</p>
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<div class="example"><h3>Example 1</h3><p><code>
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CacheIgnoreHeaders Set-Cookie
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<div class="example"><h3>Example 2</h3><p><code>
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CacheIgnoreHeaders None
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<div class="warning"><h3>Warning:</h3>
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If headers like <code>Expires</code> which are needed for proper cache
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management are not stored due to a
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<code class="directive">CacheIgnoreHeaders</code> setting, the behaviour of
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mod_cache is undefined.
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheIgnoreNoLastMod" id="CacheIgnoreNoLastMod">CacheIgnoreNoLastMod</a> <a name="cacheignorenolastmod" id="cacheignorenolastmod">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Ignore the fact that a response has no Last Modified
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheIgnoreNoLastMod On|Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreNoLastMod Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>Ordinarily, documents without a last-modified date are not cached.
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Under some circumstances the last-modified date is removed (during
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<code class="module"><a href="../mod/mod_include.html">mod_include</a></code> processing for example) or not provided
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at all. The <code class="directive">CacheIgnoreNoLastMod</code> directive
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provides a way to specify that documents without last-modified dates
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should be considered for caching, even without a last-modified date.
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If neither a last-modified date nor an expiry date are provided with
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the document then the value specified by the
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<code class="directive">CacheDefaultExpire</code> directive will be used to
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generate an expiration date.</p>
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<div class="example"><p><code>
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CacheIgnoreNoLastMod On
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheLastModifiedFactor" id="CacheLastModifiedFactor">CacheLastModifiedFactor</a> <a name="cachelastmodifiedfactor" id="cachelastmodifiedfactor">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The factor used to compute an expiry date based on the
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LastModified date.</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheLastModifiedFactor <var>float</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheLastModifiedFactor 0.1</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>In the event that a document does not provide an expiry date but does
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provide a last-modified date, an expiry date can be calculated based on
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the time since the document was last modified. The
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<code class="directive">CacheLastModifiedFactor</code> directive specifies a
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<var>factor</var> to be used in the generation of this expiry date
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according to the following formula:
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<code>expiry-period = time-since-last-modified-date * <var>factor</var>
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expiry-date = current-date + expiry-period</code>
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For example, if the document was last modified 10 hours ago, and
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<var>factor</var> is 0.1 then the expiry-period will be set to
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10*0.1 = 1 hour. If the current time was 3:00pm then the computed
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expiry-date would be 3:00pm + 1hour = 4:00pm.
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If the expiry-period would be longer than that set by
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<code class="directive">CacheMaxExpire</code>, then the latter takes
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<div class="example"><p><code>
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CacheLastModifiedFactor 0.5
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheMaxExpire" id="CacheMaxExpire">CacheMaxExpire</a> <a name="cachemaxexpire" id="cachemaxexpire">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The maximum time in seconds to cache a document</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheMaxExpire <var>seconds</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheMaxExpire 86400 (one day)</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>The <code class="directive">CacheMaxExpire</code> directive specifies the maximum number of
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seconds for which cachable HTTP documents will be retained without checking the origin
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server. Thus, documents will be out of date at most this number of seconds. This maximum
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value is enforced even if an expiry date was supplied with the document.</p>
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<div class="example"><p><code>
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CacheMaxExpire 604800
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheStoreNoStore" id="CacheStoreNoStore">CacheStoreNoStore</a> <a name="cachestorenostore" id="cachestorenostore">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Attempt to cache requests or responses that have been marked as no-store.</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheStoreNoStore On|Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheStoreNoStore Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>Ordinarily, requests or responses with Cache-Control: no-store header
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values will not be stored in the cache. The
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<code class="directive">CacheStoreNoCache</code> directive allows this
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behavior to be overridden. <code class="directive">CacheStoreNoCache</code> On
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tells the server to attempt to cache the resource even if it contains
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no-store header values. Resources requiring authorization will
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<em>never</em> be cached.</p>
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<div class="example"><p><code>
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<div class="warning"><h3>Warning:</h3>
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As described in RFC 2616, the no-store directive is intended to
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"prevent the inadvertent release or retention of sensitive information
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(for example, on backup tapes)." Enabling this option could store
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sensitive information in the cache. You are hereby warned.
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<li><code class="directive"><a href="#cacheignorecachecontrol">CacheIgnoreCacheControl</a></code></li>
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<li><code class="directive"><a href="#cachestoreprivate">CacheStorePrivate</a></code></li>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="CacheStorePrivate" id="CacheStorePrivate">CacheStorePrivate</a> <a name="cachestoreprivate" id="cachestoreprivate">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Attempt to cache responses that the server has marked as private</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheStorePrivate On|Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheStorePrivate Off</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr>
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<p>Ordinarily, responses with Cache-Control: private header values will not
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be stored in the cache. The <code class="directive">CacheStorePrivate</code>
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directive allows this behavior to be overridden.
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<code class="directive">CacheStorePrivate</code> On
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tells the server to attempt to cache the resource even if it contains
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private header values. Resources requiring authorization will
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<em>never</em> be cached.</p>
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<div class="example"><p><code>
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<div class="warning"><h3>Warning:</h3>
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This directive will allow caching even if the upstream server has
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requested that the resource not be cached. This directive is only
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ideal for a 'private' cache.
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<li><code class="directive"><a href="#cacheignorecachecontrol">CacheIgnoreCacheControl</a></code></li>
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<li><code class="directive"><a href="#cachestorenostore">CacheStoreNoStore</a></code></li>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_cache.html" title="English"> en </a> |
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<a href="../ja/mod/mod_cache.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_cache.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</div><div id="footer">
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<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>
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<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>
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