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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
commite8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch)
treeaa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/docs/manual/mod/mod_setenvif.html.en
parentcc40af334e619bb549038238507407866f774f8f (diff)
upload http
JIRA: BOTTLENECK-10 Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
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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_setenvif - 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="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.0</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_setenvif</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_setenvif.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../ja/mod/mod_setenvif.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_setenvif.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="../tr/mod/mod_setenvif.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Allows the setting of environment variables based
+on characteristics of the request</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>setenvif_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_setenvif.c</td></tr></table>
+<h3>Summary</h3>
+
+
+ <p>The <code class="module"><a href="../mod/mod_setenvif.html">mod_setenvif</a></code> module allows you to set
+ environment variables according to whether different aspects of
+ the request match regular expressions you specify. These
+ environment variables can be used by other parts of the server
+ to make decisions about actions to be taken.</p>
+
+ <p>The directives are considered in the order they appear in
+ the configuration files. So more complex sequences can be used,
+ such as this example, which sets <code>netscape</code> if the
+ browser is mozilla but not MSIE.</p>
+
+<div class="example"><p><code>
+ BrowserMatch ^Mozilla netscape<br />
+ BrowserMatch MSIE !netscape<br />
+</code></p></div>
+</div>
+<div id="quickview"><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#browsermatch">BrowserMatch</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#browsermatchnocase">BrowserMatchNoCase</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#setenvif">SetEnvIf</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#setenvifnocase">SetEnvIfNoCase</a></li>
+</ul>
+<h3>See also</h3>
+<ul class="seealso">
+<li><a href="../env.html">Environment Variables in Apache</a></li>
+</ul></div>
+
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="BrowserMatch" id="BrowserMatch">BrowserMatch</a> <a name="browsermatch" id="browsermatch">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables conditional on HTTP User-Agent
+</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>BrowserMatch <em>regex [!]env-variable</em>[=<em>value</em>]
+[[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
+</table>
+ <p>The <code class="directive">BrowserMatch</code> is a special cases of the
+ <code class="directive"><a href="#setenvif">SetEnvIf</a></code> directive that
+ sets environment variables conditional on the
+ <code>User-Agent</code> HTTP request header. The following two
+ lines have the same effect:</p>
+<div class="example"><p><code>
+ BrowserMatchNoCase Robot is_a_robot<br />
+ SetEnvIfNoCase User-Agent Robot is_a_robot<br />
+</code></p></div>
+
+ <p>Some additional examples:</p>
+<div class="example"><p><code>
+ BrowserMatch ^Mozilla forms jpeg=yes browser=netscape<br />
+ BrowserMatch "^Mozilla/[2-3]" tables agif frames javascript<br />
+ BrowserMatch MSIE !javascript<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="BrowserMatchNoCase" id="BrowserMatchNoCase">BrowserMatchNoCase</a> <a name="browsermatchnocase" id="browsermatchnocase">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables conditional on User-Agent without
+respect to case</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>BrowserMatchNoCase <em>regex [!]env-variable</em>[=<em>value</em>]
+ [[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache 1.2 and
+ above (in Apache 1.2 this directive was found in the
+ now-obsolete mod_browser module)</td></tr>
+</table>
+
+ <p>The <code class="directive">BrowserMatchNoCase</code> directive is
+ semantically identical to the <code class="directive"><a href="#browsermatch">BrowserMatch</a></code> directive.
+ However, it provides for case-insensitive matching. For
+ example:</p>
+<div class="example"><p><code>
+ BrowserMatchNoCase mac platform=macintosh<br />
+ BrowserMatchNoCase win platform=windows<br />
+</code></p></div>
+
+ <p>The <code class="directive">BrowserMatch</code> and
+ <code class="directive">BrowserMatchNoCase</code> directives are special cases of
+ the <code class="directive"><a href="#setenvif">SetEnvIf</a></code> and <code class="directive"><a href="#setenvifnocase">SetEnvIfNoCase</a></code>
+ directives. The following two lines have the same effect:</p>
+<div class="example"><p><code>
+ BrowserMatchNoCase Robot is_a_robot<br />
+ SetEnvIfNoCase User-Agent Robot is_a_robot<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="SetEnvIf" id="SetEnvIf">SetEnvIf</a> <a name="setenvif" id="setenvif">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables based on attributes of the request
+</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnvIf <em>attribute
+ regex [!]env-variable</em>[=<em>value</em>]
+ [[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
+</table>
+ <p>The <code class="directive">SetEnvIf</code> directive defines
+ environment variables based on attributes of the request. The
+ <em>attribute</em> specified in the first argument can be one of three
+ things:</p>
+
+<ol>
+<li>An HTTP request header field (see <a href="http://www.rfc-editor.org/rfc/rfc2616.txt">RFC2616</a>
+ for more information about these); for example: <code>Host</code>,
+ <code>User-Agent</code>, <code>Referer</code>, and
+ <code>Accept-Language</code>. A regular expression may be
+ used to specify a set of request headers.</li>
+
+<li>One of the following aspects of the request:
+ <ul>
+ <li><code>Remote_Host</code> - the hostname (if available) of
+ the client making the request</li>
+
+ <li><code>Remote_Addr</code> - the IP address of the client
+ making the request</li>
+
+ <li><code>Server_Addr</code> - the IP address of the server
+ on which the request was received (only with versions later
+ than 2.0.43)</li>
+
+ <li><code>Request_Method</code> - the name of the method
+ being used (<code>GET</code>, <code>POST</code>, <em>et
+ cetera</em>)</li>
+
+ <li><code>Request_Protocol</code> - the name and version of
+ the protocol with which the request was made (<em>e.g.</em>,
+ "HTTP/0.9", "HTTP/1.1", <em>etc.</em>)</li>
+
+ <li><code>Request_URI</code> - the resource requested on the HTTP
+ request line -- generally the portion of the URL
+ following the scheme and host portion without the query string. See
+ the <code class="directive"><a href="../mod/mod_rewrite.html#rewritecond">RewriteCond</a></code>
+ directive of <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code> for extra information on
+ how to match your query string.</li>
+ </ul>
+</li>
+
+<li>The name of an environment variable in the list of those
+associated with the request. This allows
+<code class="directive">SetEnvIf</code> directives to test against the result
+of prior matches. Only those environment variables defined by earlier
+<code>SetEnvIf[NoCase]</code> directives are available for testing in
+this manner. 'Earlier' means that they were defined at a broader scope
+(such as server-wide) or previously in the current directive's scope.
+Environment variables will be considered only if there was no match
+among request characteristics and a regular expression was not
+used for the <em>attribute</em>.</li>
+</ol>
+
+<p>The second argument (<em>regex</em>) is a <a href="http://www.pcre.org/">Perl compatible regular expression</a>.
+This is similar to a POSIX.2 egrep-style regular expression.
+If the <em>regex</em> matches against the <em>attribute</em>,
+then the remainder of the arguments are evaluated.</p>
+
+<p>The rest of the arguments give the names of variables to set, and
+optionally values to which they should be set. These take the form
+of</p>
+
+ <ol>
+ <li><code><em>varname</em></code>, or</li>
+
+ <li><code>!<em>varname</em></code>, or</li>
+
+ <li><code><em>varname</em>=<em>value</em></code></li>
+ </ol>
+
+ <p>In the first form, the value will be set to "1". The second
+ will remove the given variable if already defined, and the
+ third will set the variable to the literal value given by
+ <code><em>value</em></code>. Since version 2.0.51 Apache will
+ recognize occurrences of <code>$1</code>..<code>$9</code> within
+ <var>value</var> and replace them by parenthesized subexpressions
+ of <var>regex</var>.</p>
+
+<div class="example"><h3>Example:</h3><p><code>
+
+ SetEnvIf Request_URI "\.gif$" object_is_image=gif<br />
+ SetEnvIf Request_URI "\.jpg$" object_is_image=jpg<br />
+ SetEnvIf Request_URI "\.xbm$" object_is_image=xbm<br />
+ :<br />
+ SetEnvIf Referer www\.mydomain\.com intra_site_referral<br />
+ :<br />
+ SetEnvIf object_is_image xbm XBIT_PROCESSING=1<br />
+ :<br />
+ SetEnvIf ^TS* ^[a-z].* HAVE_TS<br />
+</code></p></div>
+
+ <p>The first three will set the environment variable
+ <code>object_is_image</code> if the request was for an image
+ file, and the fourth sets <code>intra_site_referral</code> if
+ the referring page was somewhere on the
+ <code>www.mydomain.com</code> Web site.</p>
+
+ <p>The last example will set environment variable
+ <code>HAVE_TS</code> if the request contains any headers that
+ begin with "TS" whose values begins with any character in the
+ set [a-z].</p>
+
+<h3>See also</h3>
+<ul>
+<li><a href="../env.html">Environment Variables in Apache</a>,
+for additional examples.
+</li>
+</ul>
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="SetEnvIfNoCase" id="SetEnvIfNoCase">SetEnvIfNoCase</a> <a name="setenvifnocase" id="setenvifnocase">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables based on attributes of the request
+without respect to case</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnvIfNoCase <em>attribute regex
+ [!]env-variable</em>[=<em>value</em>]
+ [[!]<em>env-variable</em>[=<em>value</em>]] ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_setenvif</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache 1.3 and above</td></tr>
+</table>
+
+ <p>The <code class="directive">SetEnvIfNoCase</code> is semantically identical to
+ the <code class="directive"><a href="#setenvif">SetEnvIf</a></code> directive,
+ and differs only in that the regular expression matching is
+ performed in a case-insensitive manner. For example:</p>
+<div class="example"><p><code>
+ SetEnvIfNoCase Host Apache\.Org site=apache
+</code></p></div>
+
+ <p>This will cause the <code>site</code> environment variable
+ to be set to "<code>apache</code>" if the HTTP request header
+ field <code>Host:</code> was included and contained
+ <code>Apache.Org</code>, <code>apache.org</code>, or any other
+ combination.</p>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_setenvif.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../ja/mod/mod_setenvif.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_setenvif.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
+<a href="../tr/mod/mod_setenvif.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</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> \ No newline at end of file