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<?xml version="1.0" encoding="ISO-8859-1"?><!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><!-- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --><title>mod_cache - Apache HTTP Server</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 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="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></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-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module mod_cache</h1><div class="toplang"><p><span>Available Languages: </span><a href="../en/mod/mod_cache.html" title="English"> en </a> |<a href="../ko/mod/mod_cache.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p></div><table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Content cache keyed to URIs.</td></tr><tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr><tr><th><a href="module-dict.html#ModuleIdentifier">Module營dentifier:</a></th><td>cache_module</td></tr><tr><th><a href="module-dict.html#SourceFile">Source燜ile:</a></th><td>mod_cache.c</td></tr></table><h3>Summary</h3> <div class="warning"> This module is experimental. Documentation is still under development... </div> <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 content cache that can be used to cache either local or proxied content. <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> requires the services of one or more storage management modules. Two storage management modules are included in the base Apache distribution:</p> <dl> <dt><code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code></dt> <dd>implements a disk based storage manager.</dd> <dt><code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code></dt> <dd>implements a memory based storage manager. <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code> can be configured to operate in two modes: caching open file descriptors or caching objects in heap storage. <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code> can be used to cache locally generated content or to cache backend server content for <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> when configured using <code class="directive"><a href="../mod/mod_proxy.html#proxypass">ProxyPass</a></code> (aka <dfn>reverse proxy</dfn>)</dd> </dl> <p>Content is stored in and retrieved from the cache using URI based keys. Content with access protection is not cached.</p></div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#cachedefaultexpire">CacheDefaultExpire</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cachedisable">CacheDisable</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cacheenable">CacheEnable</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cacheforcecompletion">CacheForceCompletion</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cacheignorecachecontrol">CacheIgnoreCacheControl</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cacheignorenolastmod">CacheIgnoreNoLastMod</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cachelastmodifiedfactor">CacheLastModifiedFactor</a></li><li><img alt="" src="../images/down.gif" /> <a href="#cachemaxexpire">CacheMaxExpire</a></li></ul><h3>Topics</h3><ul id="topics"><li><img alt="" src="../images/down.gif" /> <a href="#related">Related Modules and Directives</a></li><li><img alt="" src="../images/down.gif" /> <a href="#sampleconf">Sample Configuration</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="related" id="related">Related Modules and Directives</a></h2> <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#cachesize">CacheSize</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachegcinterval">CacheGcInterval</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#cacheexpirycheck">CacheExpiryCheck</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_disk_cache.html#cachetimemargin">CacheTimeMargin</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachegcdaily">CacheGcDaily</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachegcunused">CacheGcUnused</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachegcclean">CacheGcClean</a></code></li><li><code class="directive"><a href="../mod/mod_disk_cache.html#cachegcmemusage">CacheGcMemUsage</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></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="section"><h2><a name="sampleconf" id="sampleconf">Sample Configuration</a></h2> <div class="example"><h3>Sample httpd.conf</h3><p><code> #<br /> # Sample Cache Configuration<br /> #<br /> LoadModule cache_module modules/mod_cache.so<br /> <br /> <IfModule mod_cache.c><br /> <span class="indent"> #LoadModule disk_cache_module modules/mod_disk_cache.so<br /> <IfModule mod_disk_cache.c><br /> <span class="indent"> CacheRoot c:/cacheroot<br /> CacheSize 256<br /> CacheEnable disk /<br /> CacheDirLevels 5<br /> CacheDirLength 3<br /> </span> </IfModule> <br /> <br /> LoadModule mem_cache_module modules/mod_mem_cache.so<br /> <IfModule mod_mem_cache.c><br /> <span class="indent"> CacheEnable mem /<br /> MCacheSize 4096<br /> MCacheMaxObjectCount 100<br /> MCacheMinObjectSize 1<br /> MCacheMaxObjectSize 2048<br /> </span> </IfModule><br /> </span> </IfModule> </code></p></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="CacheDefaultExpire" id="CacheDefaultExpire">CacheDefaultExpire</a> <a name="cachedefaultexpire" id="cachedefaultexpire">Directive</a></h2><table class="directive"><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><tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDefaultExpire <var>seconds</var></code></td></tr><tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheDefaultExpire 3600 (one hour)</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>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr></table> <p>The <code class="directive">CacheDefaultExpire</code> directive specifies a default time, in seconds, to cache a document if neither an expiry date nor last-modified date are provided with the document. The value specified with the <code class="directive">CacheMaxExpire</code> directive does <em>not</em> override this setting.</p> <div class="example"><p><code> CacheDefaultExpire 86400 </code></p></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="CacheDisable" id="CacheDisable">CacheDisable</a> <a name="cachedisable" id="cachedisable">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Disable caching of specified URLs</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheDisable <var> url-string</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>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr></table> <p>The <code class="directive">CacheDisable</code> directive instructs <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to <em>not</em> cache urls at or below <var>url-string</var>.</p> <div class="example"><h3>Example</h3><p><code> CacheDisable /local_files </code></p></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="CacheEnable" id="CacheEnable">CacheEnable</a> <a name="cacheenable" id="cacheenable">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable caching of specified URLs using a specified storagemanager</td></tr><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><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>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr></table> <p>The <code class="directive">CacheEnable</code> directive instructs <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to cache urls at or below <var>url-string</var>. The cache storage manager is specified with the <var>cache_type</var> argument. <var>cache_type</var> <code> mem</code> instructs <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the memory based storage⌨️ 快捷键说明
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