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             <p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
         <p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_proxy_scgi.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_proxy_scgi</h1>
 <div class="toplang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_scgi.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../ja/mod/mod_proxy_scgi.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a></p>
 </div>
 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>SCGI gateway module for <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 <tr><th><a href="module-dict.html#ModuleIdentifier">Module&#160;Identifier:</a></th><td>proxy_scgi_module</td></tr>
 <tr><th><a href="module-dict.html#SourceFile">Source&#160;File:</a></th><td>mod_proxy_scgi.c</td></tr>
 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.2.14 and later</td></tr></table>
 <h3>Summary</h3>

     <p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides support for the
     <a href="http://python.ca/scgi/protocol.txt">SCGI protocol, version
     1</a>.</p>

     <p>Thus, in order to get the ability of handling the SCGI protocol,
     <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code> have to
     be present in the server.</p>

     <div class="warning"><h3>Warning</h3>
       <p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
       servers are dangerous both to your network and to the Internet at
       large.</p>
     </div>
 </div>
 <div id="quickview"><h3>Topics</h3>
 <ul id="topics">
 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
 </ul><h3 class="directives">Directives</h3>
 <ul id="toc">
 <li><img alt="" src="../images/down.gif" /> <a href="#proxyscgiinternalredirect">ProxySCGIInternalRedirect</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#proxyscgisendfile">ProxySCGISendfile</a></li>
 </ul>
 <h3>See also</h3>
 <ul class="seealso">
 <li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
 <li><code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li>
 </ul><ul class="seealso"><li><a href="#comments_section">Comments</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="examples" id="examples">Examples</a></h2>
     <p>Remember, in order to make the following examples work, you have to
     enable <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code>.</p>

     <div class="example"><h3>Simple gateway</h3><p><code>
       ProxyPass /scgi-bin/ scgi://localhost:4000/
     </code></p></div>

     <p>The balanced gateway needs <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> in
     addition to the already mentioned proxy modules.</p>

     <div class="example"><h3>Balanced gateway</h3><p><code>
     ProxyPass /scgi-bin/ balancer://somecluster/<br />
     &lt;Proxy balancer://somecluster/&gt;<br />
     <span class="indent">
         BalancerMember scgi://localhost:4000/<br />
         BalancerMember scgi://localhost:4001/<br />
     </span>
     &lt;/Proxy&gt;
     </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="ProxySCGIInternalRedirect" id="ProxySCGIInternalRedirect">ProxySCGIInternalRedirect</a> <a name="proxyscgiinternalredirect" id="proxyscgiinternalredirect">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable or disable internal redirect responses from the
 backend</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxySCGIInternalRedirect On|Off</code></td></tr>
 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxySCGIInternalRedirect On</code></td></tr>
 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_scgi</td></tr>
 </table>
     <p>The <code class="directive">ProxySCGIInternalRedirect</code> enables the backend
     to internally redirect the gateway to a different URL. This feature
     origins in <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, which internally redirects the
     response, if the response status is <code>OK</code> (<code>200</code>) and
     the response contains a <code>Location</code> header and its value starts
     with a slash (<code>/</code>). This value is interpreted as a new local
     URL the apache internally redirects to.</p>

     <p><code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code> does the same as
     <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code> in this regard, except that you can turn off the
     feature.</p>

     <div class="example"><h3>Example</h3><p><code>
     ProxySCGIInternalRedirect Off
     </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="ProxySCGISendfile" id="ProxySCGISendfile">ProxySCGISendfile</a> <a name="proxyscgisendfile" id="proxyscgisendfile">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable evaluation of <var>X-Sendfile</var> pseudo response
 header</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxySCGISendfile On|Off|<var>Headername</var></code></td></tr>
 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxySCGISendfile Off</code></td></tr>
 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_scgi</td></tr>
 </table>
     <p>The <code class="directive">ProxySCGISendfile</code> directive enables the
     SCGI backend to let files serve directly by the gateway. This is useful
     performance purposes -- the httpd can use <code>sendfile</code> or other
     optimizations, which are not possible if the file comes over the backend
     socket.</p>
     <p>The <code class="directive">ProxySCGISendfile</code> argument determines the
     gateway behaviour:</p>
     <dl>
     <dt><code>Off</code></dt>
     <dd>No special handling takes place.</dd>

     <dt><code>On</code></dt>
     <dd>The gateway looks for a backend response header called
     <code>X-Sendfile</code> and interprets the value as filename to serve. The
     header is removed from the final response headers. This is equivalent to
     <code>ProxySCGISendfile X-Sendfile</code>.</dd>

     <dt>anything else</dt>
     <dd>Similar to <code>On</code>, but instead of the hardcoded header name
     the argument is applied as header name.</dd>
     </dl>

     <div class="example"><h3>Example</h3><p><code>
     # Use the default header (X-Sendfile)<br />
     ProxySCGISendfile On<br />
     <br />
     # Use a different header<br />
     ProxySCGISendfile X-Send-Static
     </code></p></div>

 </div>
 </div>
 <div class="bottomlang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_proxy_scgi.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../ja/mod/mod_proxy_scgi.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a></p>
 </div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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	<p class="apache">Apache HTTP Server Version 2.2</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 2.2</a> > <a href="./">Modules</a></div>
	<div id="page-content">
	<div class="retired"><h4>Please note</h4>
	<p>This document refers to the <strong>2.2</strong> version of Apache httpd, which is no longer maintained. The active release is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p>
	<p>You may follow <a href="http://httpd.apache.org/docs/current/mod/mod_proxy_scgi.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Apache Module mod_proxy_scgi</h1>
	<div class="toplang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_scgi.html" title="English"> en </a> \|
	<a href="../ja/mod/mod_proxy_scgi.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
	</div>
	<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>SCGI gateway module for <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
	<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
	<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_scgi_module</td></tr>
	<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_scgi.c</td></tr>
	<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.2.14 and later</td></tr></table>
	<h3>Summary</h3>

	<p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>. It provides support for the
	<a href="http://python.ca/scgi/protocol.txt">SCGI protocol, version
	1</a>.</p>

	<p>Thus, in order to get the ability of handling the SCGI protocol,
	<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code> have to
	be present in the server.</p>

	<div class="warning"><h3>Warning</h3>
	<p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
	servers are dangerous both to your network and to the Internet at
	large.</p>
	</div>
	</div>
	<div id="quickview"><h3>Topics</h3>
	<ul id="topics">
	<li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
	</ul><h3 class="directives">Directives</h3>
	<ul id="toc">
	<li><img alt="" src="../images/down.gif" /> <a href="#proxyscgiinternalredirect">ProxySCGIInternalRedirect</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#proxyscgisendfile">ProxySCGISendfile</a></li>
	</ul>
	<h3>See also</h3>
	<ul class="seealso">
	<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
	<li><code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code></li>
	</ul><ul class="seealso"><li><a href="#comments_section">Comments</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="examples" id="examples">Examples</a></h2>
	<p>Remember, in order to make the following examples work, you have to
	enable <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code> and <code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code>.</p>

	<div class="example"><h3>Simple gateway</h3><p><code>
	ProxyPass /scgi-bin/ scgi://localhost:4000/
	</code></p></div>

	<p>The balanced gateway needs <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code> in
	addition to the already mentioned proxy modules.</p>

	<div class="example"><h3>Balanced gateway</h3><p><code>
	ProxyPass /scgi-bin/ balancer://somecluster/<br />
	<Proxy balancer://somecluster/><br />
	<span class="indent">
	BalancerMember scgi://localhost:4000/<br />
	BalancerMember scgi://localhost:4001/<br />
	</span>
	</Proxy>
	</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="ProxySCGIInternalRedirect" id="ProxySCGIInternalRedirect">ProxySCGIInternalRedirect</a> <a name="proxyscgiinternalredirect" id="proxyscgiinternalredirect">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable or disable internal redirect responses from the
	backend</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxySCGIInternalRedirect On\|Off</code></td></tr>
	<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxySCGIInternalRedirect On</code></td></tr>
	<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
	<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_scgi</td></tr>
	</table>
	<p>The <code class="directive">ProxySCGIInternalRedirect</code> enables the backend
	to internally redirect the gateway to a different URL. This feature
	origins in <code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code>, which internally redirects the
	response, if the response status is <code>OK</code> (<code>200</code>) and
	the response contains a <code>Location</code> header and its value starts
	with a slash (<code>/</code>). This value is interpreted as a new local
	URL the apache internally redirects to.</p>

	<p><code class="module"><a href="../mod/mod_proxy_scgi.html">mod_proxy_scgi</a></code> does the same as
	<code class="module"><a href="../mod/mod_cgi.html">mod_cgi</a></code> in this regard, except that you can turn off the
	feature.</p>

	<div class="example"><h3>Example</h3><p><code>
	ProxySCGIInternalRedirect Off
	</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="ProxySCGISendfile" id="ProxySCGISendfile">ProxySCGISendfile</a> <a name="proxyscgisendfile" id="proxyscgisendfile">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable evaluation of <var>X-Sendfile</var> pseudo response
	header</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxySCGISendfile On\|Off\|<var>Headername</var></code></td></tr>
	<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>ProxySCGISendfile Off</code></td></tr>
	<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
	<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_scgi</td></tr>
	</table>
	<p>The <code class="directive">ProxySCGISendfile</code> directive enables the
	SCGI backend to let files serve directly by the gateway. This is useful
	performance purposes -- the httpd can use <code>sendfile</code> or other
	optimizations, which are not possible if the file comes over the backend
	socket.</p>
	<p>The <code class="directive">ProxySCGISendfile</code> argument determines the
	gateway behaviour:</p>
	<dl>
	<dt><code>Off</code></dt>
	<dd>No special handling takes place.</dd>

	<dt><code>On</code></dt>
	<dd>The gateway looks for a backend response header called
	<code>X-Sendfile</code> and interprets the value as filename to serve. The
	header is removed from the final response headers. This is equivalent to
	<code>ProxySCGISendfile X-Sendfile</code>.</dd>

	<dt>anything else</dt>
	<dd>Similar to <code>On</code>, but instead of the hardcoded header name
	the argument is applied as header name.</dd>
	</dl>

	<div class="example"><h3>Example</h3><p><code>
	# Use the default header (X-Sendfile)<br />
	ProxySCGISendfile On<br />
	<br />
	# Use a different header<br />
	ProxySCGISendfile X-Send-Static
	</code></p></div>

	</div>
	</div>
	<div class="bottomlang">
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