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<title>Using CGI - Configure - H2O - the optimized HTTP/2 server</title>
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<a href="configure.html">Configure</a> >
Using CGI
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<p>
Starting from version 1.7, H2O comes with a FastCGI-to-CGI gateway (<code>fastcgi-cgi</code>), which can be found under <code>share/h2o</code> directory of the installation path.
The gateway can be used for running CGI scripts through the FastCGI handler.
</p>
<p>
The example below maps <code>.cgi</code> files to be executed by the gateway.
It is also possible to run CGI scripts under different privileges by specifying the <code>user</code> attribute of the directive.
</p>
<div class="example">
<div class="caption">Example. Execute <code>.cgi</code> files using FastCGI-to-CGI gateway</div>
<pre><code>file.custom-handler:
extension: .cgi
fastcgi.spawn:
command: "exec $H2O_ROOT/share/h2o/fastcgi-cgi"
</code></pre>
</div>
The gateway also provides options to for tuning the behavior. A full list of options can be obtained by running the gateway directly with <code>--help</code> option.
<div class="example">
<div class="caption">Example. Output of <code>share/h2o/fastcgi-cgi --help</code></div>
<pre><code>$ share/h2o/fastcgi-cgi --help
Usage:
share/h2o/fastcgi-cgi [options]
Options:
--listen=sockfn path to the UNIX socket. If specified, the program will
create a UNIX socket at given path replacing the existing
file (should it exist). If not, file descriptor zero (0)
will be used as the UNIX socket for accepting new
connections.
--max-workers=nnn maximum number of CGI processes (default: unlimited)
--pass-authz if set, preserves HTTP_AUTHORIZATION parameter
</code></pre>
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