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<title>core － Apache 2.2 中文版参考手册</title>
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<p class="menu"><a href="../mod/index.html">模块索引</a> | <a href="../mod/directives.html">指令索引</a> | <a href="../faq/index.html">常见问题</a> | <a href="../glossary.html">词汇表</a> | <a href="../sitemap.html">站点导航</a></p><p class="apache">Apache HTTP Server 版本2.2</p><img alt="" src="../images/feather.gif" /></div>
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<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/">文档</a> > <a href="../index.html">版本2.2</a> > <a href="./index.html">模块</a></div>
<div id="translation-info"> <a href="../translator_announcement.html#thanks">致谢</a> | 本篇译者：<a href="mailto:csfrank@citiz.net">金步国</a> | 本页最后更新：2006年1月20日 | <a href="../translator_announcement.html#last_new">获取最新版本</a> | <a href="http://lamp.linux.gov.cn/Apache/ApacheMenu/index.html">电信镜象</a> | <a href="http://www.dogdoghome.com/lamp/Apache/ApacheMenu/index.html">网通镜象</a> | <a href="http://lamp.haloso.net/Apache/ApacheMenu/index.html">教育网镜象</a></div>
<div id="page-content"><div id="preamble"><h1>Apache核心(Core)特性</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>Apache HTTP服务器核心提供的功能，始终有效</td></tr>
<tr><th><a href="module-dict.html#Status">状态</a></th><td>核心(C)</td></tr>
</table>
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<div class="directive-section"><h2><a name="AcceptFilter" id="AcceptFilter">AcceptFilter</a> <a name="acceptfilter" id="acceptfilter">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>根据协议类型对监听Socket进行优化</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>AcceptFilter <var>protocol</var> <var>accept_filter</var></code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>核心(C)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>core</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">兼容性</a></th><td>仅在 Apache 2.1.5 以后的版本中可用</td></tr>
</table>
<p>这个指令使得操作系统根据协议类型对监听socket进行特别的优化。其基本前提是内核在数据接受完毕或一个完整的HTTP请求缓冲完成前不向服务器进程发送socket 。目前仅支持<a href="http://www.freebsd.org/cgi/man.cgi?query=accept_filter&sektion=9">FreeBSD的接收过滤器(Accept Filter)</a>和Linux的更原始的(more primitive)<code>TCP_DEFER_ACCEPT</code> 。</p>
<p>FreeBSD上的默认值是：</p>
<div class="example"><p><code>
AcceptFilter http httpready <br />
AcceptFilter https dataready
</code></p></div>
<p><code>httpready</code>接收过滤器(Accept Filter)在内核级别缓冲整个HTTP请求。一旦一个请求体被完整接收，内核将把它发送给服务器。参见<a href="http://www.freebsd.org/cgi/man.cgi?query=accf_http&sektion=9">accf_http(9)</a>手册页以获得更详细的信息。因为HTTPS请求已经被加密了，所以只使用了<a href="http://www.freebsd.org/cgi/man.cgi?query=accf_data&sektion=9">accf_data(9)</a>过滤器。</p>
<p>Linux上的默认值是：</p>
<div class="example"><p><code>
AcceptFilter http data <br />
AcceptFilter https data
</code></p></div>
<p>Linux的<code>TCP_DEFER_ACCEPT</code>并不支持对http请求进行缓冲。除<code>none</code>之外的任何值都将在监听程序上启用<code>TCP_DEFER_ACCEPT</code> 。参见<a href="http://homepages.cwi.nl/~aeb/linux/man2html/man7/tcp.7.html">tcp(7)</a>手册页以获得更多详情。</p>
<p>使用<code>none</code>将会为那个协议禁用接收过滤器(accept filter)。这对于像<code>nntp</code>这样需要服务器先发送数据的协议很有用处：</p>
<div class="example"><p><code>AcceptFilter nttp none</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="AcceptPathInfo" id="AcceptPathInfo">AcceptPathInfo</a> <a name="acceptpathinfo" id="acceptpathinfo">指令</a></h2>
<table border="1" cellpadding="0" cellspacing="0" bordercolor="#AAAAAA" class="directive">
<tr><th><a href="directive-dict.html#Description">说明</a></th><td>是否接受附带多余路径名信息的请求</td></tr>
<tr><th><a href="directive-dict.html#Syntax">语法</a></th><td><code>AcceptPathInfo On|Off|Default</code></td></tr>
<tr><th><a href="directive-dict.html#Default">默认值</a></th><td><code>AcceptPathInfo Default</code></td></tr>
<tr><th><a href="directive-dict.html#Context">作用域</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
<tr><th><a href="directive-dict.html#Override">覆盖项</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">状态</a></th><td>核心(C)</td></tr>
<tr><th><a href="directive-dict.html#Module">模块</a></th><td>core</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">兼容性</a></th><td>仅在 Apache 2.0.30 及以后的版本中可用</td></tr>
</table>
<p>此指令决定是否接受在实际文件名(或实际目录中一个不存在的文件)后跟随多余路径名信息的请求。这个多余的路径名信息可以当作<code>PATH_INFO</code>环境变量传递给脚本。</p>
<p>比如说，假设<code>/test/</code>所指向的目录下只包括一个文件：<code>here.html</code> ，那么对<code>/test/here.html/more</code>和<code>/test/nothere.html/more</code>的请求都会将<code>PATH_INFO</code>环境变量设为"<code>/more</code>"。</p>
<p><code class="directive">AcceptPathInfo</code>指令的取值范围：</p>
<dl>
<dt><code>Off</code></dt><dd>仅当一个请求映射到一个真实存在的路径时，才会被接受。这样，如上述<code>/test/here.html/more</code>这样在真实文件名后跟随一个路径名的请求将会返回一个"404 NOT FOUND"错误。</dd>
<dt><code>On</code></dt><dd>只要前导路径可以映射到一个真实存在的文件，就可以接受该请求。这样，只要上述<code>/test/here.html</code>能够映射到一个有效的文件，那么对<code>/test/here.html/more</code>的请求就会被接收。</dd>
<dt><code>Default</code></dt><dd>是否接收附带多余路径名信息的请求由其对应的<a href="../handler.html">处理器</a>来决定。对应普通文本的核心处理器默认会拒绝<code>PATH_INFO</code> 。而用于伺服脚本的处理器，比如<a href="mod_cgi.html">cgi-script</a>和<a href="mod_isapi.html">isapi-isa</a>，默认会接受<code>PATH_INFO</code> 。</dd>
</dl>
<p><code>AcceptPathInfo</code>指令存在的首要目的就是允许您覆盖处理器关于是否接受<code>PATH_INFO</code>的默认设置。这种覆盖是很必要的。比如说，当您使用了类似<a href="mod_include.html">INCLUDES</a>这样的<a href="../filter.html">过滤器</a>来根据<code>PATH_INFO</code>产生内容时。核心处理器通常会拒绝这样的请求，而您就可以用下述的配置使这样的脚本成为可能：</p>
<div class="example"><p><code>
<Files "mypaths.shtml"><br />
<span class="indent">
Options +Includes<br />
SetOutputFilter INCLUDES<br />
AcceptPathInfo On<br />
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资源评论
stop_arrogent2011-11-04谢谢啊，很有用的帮助文档- luck6562012-12-27还行，实用
YuanHongs2013-08-07很好的帮助文档
