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| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
|---|---|---|
| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
| commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
| tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/apache2/manual/mod/mod_cache.html.en | |
| parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) | |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/apache2/manual/mod/mod_cache.html.en')
| -rw-r--r-- | rubbos/app/apache2/manual/mod/mod_cache.html.en | 387 |
1 files changed, 0 insertions, 387 deletions
diff --git a/rubbos/app/apache2/manual/mod/mod_cache.html.en b/rubbos/app/apache2/manual/mod/mod_cache.html.en deleted file mode 100644 index 8be49fbb..00000000 --- a/rubbos/app/apache2/manual/mod/mod_cache.html.en +++ /dev/null @@ -1,387 +0,0 @@ -<?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/">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 Identifier:</a></th><td>cache_module</td></tr> -<tr><th><a href="module-dict.html#SourceFile">Source File:</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="#cacheignoreheaders">CacheIgnoreHeaders</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 storage -manager</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 - manager implemented by <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>. - <var>cache_type</var> <code>disk</code> instructs - <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the disk based storage manager - implemented by <code class="module"><a href="../mod/mod_disk_cache.html">mod_disk_cache</a></code>. - <var>cache_type</var> <code>fd</code> instructs - <code class="module"><a href="../mod/mod_cache.html">mod_cache</a></code> to use the file descriptor cache implemented - by <code class="module"><a href="../mod/mod_mem_cache.html">mod_mem_cache</a></code>.</p> - <p>In the event that the URL space overlaps between different - <code class="directive">CacheEnable</code> directives (as in the example below), - each possible storage manager will be run until the first one that - actually processes the request. The order in which the storage managers are - run is determined by the order of the <code class="directive">CacheEnable</code> - directives in the configuration file.</p> - - <div class="example"><p><code> - CacheEnable mem /manual<br /> - CacheEnable fd /images<br /> - CacheEnable disk /<br /> - </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="CacheForceCompletion" id="CacheForceCompletion">CacheForceCompletion</a> <a name="cacheforcecompletion" id="cacheforcecompletion">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Percentage of document served, after which the server -will complete caching the file even if the request is cancelled.</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheForceCompletion <var>Percentage</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheForceCompletion 60</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>Ordinarily, if a request is cancelled while the response is being - cached and delivered to the client the processing of the response will - stop and the cache entry will be removed. The - <code class="directive">CacheForceCompletion</code> directive specifies a - threshold beyond which the document will continue to be cached to - completion, even if the request is cancelled.</p> - - <p>The threshold is a percentage specified as a value between - <code>1</code> and <code>100</code>. A value of <code>0</code> - specifies that the default be used. A value of <code>100</code> - will only cache documents that are served in their entirety. A value - between 60 and 90 is recommended.</p> - - <div class="example"><p><code> - CacheForceCompletion 80 - </code></p></div> - - <div class="warning"><h3>Note:</h3> - This feature is currently <em>not</em> implemented. - </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="CacheIgnoreCacheControl" id="CacheIgnoreCacheControl">CacheIgnoreCacheControl</a> <a name="cacheignorecachecontrol" id="cacheignorecachecontrol">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Ignore the fact that the client requested the content not be -cached.</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheIgnoreCacheControl On|Off</code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreCacheControl 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>Experimental</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr> -</table> - <p>Ordinarily, documents with no-cache or no-store header values will not be stored in the cache. - The <code class="directive">CacheIgnoreCacheControl</code> directive allows this behavior to be overridden. - <code class="directive">CacheIgnoreCacheControl</code> On tells the server to attempt to cache the document - even if it contains no-cache or no-store header values. Documents requiring authorization will - <em>never</em> be cached.</p> - - <div class="example"><p><code> - CacheIgnoreCacheControl On - </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="CacheIgnoreHeaders" id="CacheIgnoreHeaders">CacheIgnoreHeaders</a> <a name="cacheignoreheaders" id="cacheignoreheaders">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Do not store the given HTTP header(s) in the cache. -</td></tr> -<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> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreHeaders None</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>According to RFC 2616, hop-by-hop HTTP headers are not stored in - the cache. The following HTTP headers are hop-by-hop headers and thus - do not get stored in the cache in <em>any</em> case regardless of the - setting of <code class="directive">CacheIgnoreHeaders</code>:</p> - - <ul> - <li><code>Connection</code></li> - <li><code>Keep-Alive</code></li> - <li><code>Proxy-Authenticate</code></li> - <li><code>Proxy-Authorization</code></li> - <li><code>TE</code></li> - <li><code>Trailers</code></li> - <li><code>Transfer-Encoding</code></li> - <li><code>Upgrade</code></li> - </ul> - - <p><code class="directive">CacheIgnoreHeaders</code> specifies additional HTTP - headers that should not to be stored in the cache. For example, it makes - sense in some cases to prevent cookies from being stored in the cache.</p> - - <p><code class="directive">CacheIgnoreHeaders</code> takes a space separated list - of HTTP headers that should not be stored in the cache. If only hop-by-hop - headers not should be stored in the cache (the RFC 2616 compliant - behaviour), <code class="directive">CacheIgnoreHeaders</code> can be set to - <code>None</code>.</p> - - <div class="example"><h3>Example 1</h3><p><code> - CacheIgnoreHeaders Set-Cookie - </code></p></div> - - <div class="example"><h3>Example 2</h3><p><code> - CacheIgnoreHeaders None - </code></p></div> - - <div class="warning"><h3>Warning:</h3> - If headers like <code>Expires</code> which are needed for proper cache - management are not stored due to a - <code class="directive">CacheIgnoreHeaders</code> setting, the behaviour of - mod_cache is undefined. - </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="CacheIgnoreNoLastMod" id="CacheIgnoreNoLastMod">CacheIgnoreNoLastMod</a> <a name="cacheignorenolastmod" id="cacheignorenolastmod">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Ignore the fact that a response has no Last Modified -header.</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheIgnoreNoLastMod On|Off</code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheIgnoreNoLastMod 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>Experimental</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_cache</td></tr> -</table> - <p>Ordinarily, documents without a last-modified date are not cached. - Under some circumstances the last-modified date is removed (during - <code class="module"><a href="../mod/mod_include.html">mod_include</a></code> processing for example) or not provided - at all. The <code class="directive">CacheIgnoreNoLastMod</code> directive - provides a way to specify that documents without last-modified dates - should be considered for caching, even without a last-modified date. - If neither a last-modified date nor an expiry date are provided with - the document then the value specified by the - <code class="directive">CacheDefaultExpire</code> directive will be used to - generate an expiration date.</p> - - <div class="example"><p><code> - CacheIgnoreNoLastMod On - </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="CacheLastModifiedFactor" id="CacheLastModifiedFactor">CacheLastModifiedFactor</a> <a name="cachelastmodifiedfactor" id="cachelastmodifiedfactor">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The factor used to compute an expiry date based on the -LastModified date.</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheLastModifiedFactor <var>float</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheLastModifiedFactor 0.1</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>In the event that a document does not provide an expiry date but does - provide a last-modified date, an expiry date can be calculated based on - the time since the document was last modified. The - <code class="directive">CacheLastModifiedFactor</code> directive specifies a - <var>factor</var> to be used in the generation of this expiry date - according to the following formula: - - <code>expiry-period = time-since-last-modified-date * <var>factor</var> - expiry-date = current-date + expiry-period</code> - - For example, if the document was last modified 10 hours ago, and - <var>factor</var> is 0.1 then the expiry-period will be set to - 10*0.1 = 1 hour. If the current time was 3:00pm then the computed - expiry-date would be 3:00pm + 1hour = 4:00pm. - - If the expiry-period would be longer than that set by - <code class="directive">CacheMaxExpire</code>, then the latter takes - precedence.</p> - - <div class="example"><p><code> - CacheLastModifiedFactor 0.5 - </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="CacheMaxExpire" id="CacheMaxExpire">CacheMaxExpire</a> <a name="cachemaxexpire" id="cachemaxexpire">Directive</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The maximum time in seconds to cache a document</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>CacheMaxExpire <var>seconds</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>CacheMaxExpire 86400 (one day)</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">CacheMaxExpire</code> directive specifies the maximum number of - seconds for which cachable HTTP documents will be retained without checking the origin - server. Thus, documents will be out of date at most this number of seconds. This maximum - value is enforced even if an expiry date was supplied with the document.</p> - - <div class="example"><p><code> - CacheMaxExpire 604800 - </code></p></div> - -</div> -</div> -<div class="bottomlang"> -<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><div id="footer"> -<p class="apache">Copyright 2009 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> -</body></html>
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