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- --><title>Environment Variables in Apache - Apache HTTP Server</title><link href="./style/manual.css" type="text/css" rel="stylesheet"/></head><body><blockquote><div align="center"><img src="./images/sub.gif" alt="[APACHE DOCUMENTATION]"/><h3>Apache HTTP Server Version 2.0</h3></div><h1 align="center">Environment Variables in Apache</h1>
+ --><title>Environment Variables in Apache - Apache HTTP Server</title><link href="./style/manual.css" type="text/css" rel="stylesheet"></head><body><blockquote><div align="center"><img src="./images/sub.gif" alt="[APACHE DOCUMENTATION]"><h3>Apache HTTP Server Version 2.0</h3></div><h1 align="center">Environment Variables in Apache</h1>
<p>The Apache HTTP Server provides a mechanism for storing
information in named variables that are called <em>environment
variables</em>. This information can be used to control various
server itself runs, you must use the standard environment
manipulation mechanisms provided by your operating system
shell.</p>
- <ul><li><a href="#setting">Setting Environment Variables</a><ul><li><a href="#basic-manipulation">Basic Environment Manipulation</a></li><li><a href="#conditional">Conditional Per-Request Settings</a></li><li><a href="#unique-identifiers">Unique Identifiers</a></li><li><a href="#standard-cgi">Standard CGI Variables</a></li><li><a href="#caveats">Some Caveats</a></li></ul></li><li><a href="#using">Using Environment Variables</a><ul><li><a href="#cgi-scripts">CGI Scripts</a></li><li><a href="#ssi-pages">SSI Pages</a></li><li><a href="#access-control">Access Control</a></li><li><a href="#logging">Conditional Logging</a></li><li><a href="#response-headers">Conditional Response Headers</a></li><li><a href="#url-rewriting">URL Rewriting</a></li></ul></li><li><a href="#special">Special Purpose Environment Variables</a><ul><li><a href="#downgrade">downgrade-1.0</a></li><li><a href="#force-no-vary">force-no-vary</a></li><li><a href="#force-response">force-response-1.0</a></li><li><a href="#nokeepalive">nokeepalive</a></li><li><a href="#redirect-carefully">redirect-carefully</a></li></ul></li><li><a href="#examples">Examples</a><ul><li><a href="#misbehaving">Changing protocol behavior with misbehaving clients</a></li><li><a href="#no-img-log">Do not log requests for images in the access log</a></li><li><a href="#image-theft">Prevent "Image Theft"</a></li></ul></li></ul><hr
/><h2><a name="setting">Setting Environment Variables</a></h2>
+ <ul><li><a href="#setting">Setting Environment Variables</a><ul><li><a href="#basic-manipulation">Basic Environment Manipulation</a></li><li><a href="#conditional">Conditional Per-Request Settings</a></li><li><a href="#unique-identifiers">Unique Identifiers</a></li><li><a href="#standard-cgi">Standard CGI Variables</a></li><li><a href="#caveats">Some Caveats</a></li></ul></li><li><a href="#using">Using Environment Variables</a><ul><li><a href="#cgi-scripts">CGI Scripts</a></li><li><a href="#ssi-pages">SSI Pages</a></li><li><a href="#access-control">Access Control</a></li><li><a href="#logging">Conditional Logging</a></li><li><a href="#response-headers">Conditional Response Headers</a></li><li><a href="#url-rewriting">URL Rewriting</a></li></ul></li><li><a href="#special">Special Purpose Environment Variables</a><ul><li><a href="#downgrade">downgrade-1.0</a></li><li><a href="#force-no-vary">force-no-vary</a></li><li><a href="#force-response">force-response-1.0</a></li><li><a href="#nokeepalive">nokeepalive</a></li><li><a href="#redirect-carefully">redirect-carefully</a></li></ul></li><li><a href="#examples">Examples</a><ul><li><a href="#misbehaving">Changing protocol behavior with misbehaving clients</a></li><li><a href="#no-img-log">Do not log requests for images in the access log</a></li><li><a href="#image-theft">Prevent "Image Theft"</a></li></ul></li></ul><hr><h2><a name="setting">Setting Environment Variables</a></h2>
- <table border="1"><tr><td valign="top"><strong>Related Modules</strong><br/><br/><code><a href="./mod/mod_env.html">mod_env</a></code><br/><code><a href="./mod/mod_rewrite.html">mod_rewrite</a></code><br/><code><a href="./mod/mod_setenvif.html">mod_setenvif</a></code><br/><code><a href="./mod/mod_unique_id.html">mod_unique_id</a></code><br/></td><td valign="top"><strong>Related Directives</strong><br/><br/><a href="./mod/mod_setenvif.html#browsermatch" class="directive"><code class="directive">BrowserMatch</code></a><br/><a href="./mod/mod_setenvif.html#browsermatchnocase" class="directive"><code class="directive">BrowserMatchNoCase</code></a><br/><a href="./mod/mod_env.html#passenv" class="directive"><code class="directive">PassEnv</code></a><br/><a href="./mod/mod_rewrite.html#rewriterule" class="directive"><code class="directive">RewriteRule</code></a><br/><a href="./mod/mod_env.html#setenv" class="directive"><code class="directive">SetEnv</code></a><br/><a href="./mod/mod_setenvif.html#setenvif" class="directive"><code class="directive">SetEnvIf</code></a><br/><a href="./mod/mod_setenvif.html#setenvifnocase" class="directive"><code class="directive">SetEnvIfNoCase</code></a><br/><a href="./mod/mod_env.html.html#unsetenv" class="directive"><code class="directive">UnsetEnv</code></a><br/></td></tr></table>
+ <table border="1"><tr><td valign="top"><strong>Related Modules</strong><br><br><code><a href="./mod/mod_env.html">mod_env</a></code><br><code><a href="./mod/mod_rewrite.html">mod_rewrite</a></code><br><code><a href="./mod/mod_setenvif.html">mod_setenvif</a></code><br><code><a href="./mod/mod_unique_id.html">mod_unique_id</a></code><br></td><td valign="top"><strong>Related Directives</strong><br><br><a href="./mod/mod_setenvif.html#browsermatch" class="directive"><code class="directive">BrowserMatch</code></a><br><a href="./mod/mod_setenvif.html#browsermatchnocase" class="directive"><code class="directive">BrowserMatchNoCase</code></a><br><a href="./mod/mod_env.html#passenv" class="directive"><code class="directive">PassEnv</code></a><br><a href="./mod/mod_rewrite.html#rewriterule" class="directive"><code class="directive">RewriteRule</code></a><br><a href="./mod/mod_env.html#setenv" class="directive"><code class="directive">SetEnv</code></a><br><a href="./mod/mod_setenvif.html#setenvif" class="directive"><code class="directive">SetEnvIf</code></a><br><a href="./mod/mod_setenvif.html#setenvifnocase" class="directive"><code class="directive">SetEnvIfNoCase</code></a><br><a href="./mod/mod_env.html#unsetenv" class="directive"><code class="directive">UnsetEnv</code></a><br></td></tr></table>
<h3><a name="basic-manipulation">Basic Environment Manipulation</a></h3>
<h2><a name="using">Using Environment Variables</a></h2>
- <table border="1"><tr><td valign="top"><strong>Related Modules</strong><br/><br/><code><a href="./mod/mod_access.html">mod_access</a></code><br/><code><a href="./mod/mod_cgi.html">mod_cgi</a></code><br/><code><a href="./mod/mod_headers.html">mod_headers</a></code><br/><code><a href="./mod/mod_include.html">mod_include</a></code><br/><code><a href="./mod/mod_log_config.html">mod_log_config</a></code><br/><code><a href="./mod/mod_rewrite.html">mod_rewrite</a></code><br/></td><td valign="top"><strong>Related Directives</strong><br/><br/><a href="./mod/mod_access.html#allow" class="directive"><code class="directive">Allow</code></a><br/><a href="./mod/mod_log_config.html#customlog" class="directive"><code class="directive">CustomLog</code></a><br/><a href="./mod/mod_access.html#deny" class="directive"><code class="directive">Deny</code></a><br/><a href="./mod/mod_headers.html#header" class="directive"><code class="directive">Header</code></a><br/><a href="./mod/mod_log_config.html#logformat" class="directive"><code class="directive">LogFormat</code></a><br/><a href="./mod/mod_rewrite.html#rewritecond" class="directive"><code class="directive">RewriteCond</code></a><br/><a href="./mod/mod_rewrite.html#rewriterule" class="directive"><code class="directive">RewriteRule</code></a><br/></td></tr></table>
+ <table border="1"><tr><td valign="top"><strong>Related Modules</strong><br><br><code><a href="./mod/mod_access.html">mod_access</a></code><br><code><a href="./mod/mod_cgi.html">mod_cgi</a></code><br><code><a href="./mod/mod_headers.html">mod_headers</a></code><br><code><a href="./mod/mod_include.html">mod_include</a></code><br><code><a href="./mod/mod_log_config.html">mod_log_config</a></code><br><code><a href="./mod/mod_rewrite.html">mod_rewrite</a></code><br></td><td valign="top"><strong>Related Directives</strong><br><br><a href="./mod/mod_access.html#allow" class="directive"><code class="directive">Allow</code></a><br><a href="./mod/mod_log_config.html#customlog" class="directive"><code class="directive">CustomLog</code></a><br><a href="./mod/mod_access.html#deny" class="directive"><code class="directive">Deny</code></a><br><a href="./mod/mod_headers.html#header" class="directive"><code class="directive">Header</code></a><br><a href="./mod/mod_log_config.html#logformat" class="directive"><code class="directive">LogFormat</code></a><br><a href="./mod/mod_rewrite.html#rewritecond" class="directive"><code class="directive">RewriteCond</code></a><br><a href="./mod/mod_rewrite.html#rewriterule" class="directive"><code class="directive">RewriteRule</code></a><br></td></tr></table>
<h3><a name="cgi-scripts">CGI Scripts</a></h3>
ApacheToday tutorial " <a href="http://apachetoday.com/news_story.php3?ltsn=2000-06-14-002-01-PS">
Keeping Your Images from Adorning Other Sites</a>".</p>
- <hr/></blockquote><h3 align="center">Apache HTTP Server Version 2.0</h3><a href="./"><img src="./images/index.gif" alt="Index"/></a><a href="./"><img src="./images/home.gif" alt="Home"/></a></body></html>
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+ <hr></blockquote><h3 align="center">Apache HTTP Server Version 2.0</h3><a href="./"><img src="./images/index.gif" alt="Index"></a><a href="./"><img src="./images/home.gif" alt="Home"></a></body></html>
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