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<link title="Get" rel="Chapter" href="Get.html"><title>Ocamlnet 4 Reference Manual : Netcgi_fcgi</title>
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<h1>Module <a href="type_Netcgi_fcgi.html">Netcgi_fcgi</a></h1>
<pre><span id="MODULENetcgi_fcgi"><span class="keyword">module</span> Netcgi_fcgi</span>: <code class="code">sig</code> <a href="Netcgi_fcgi.html">..</a> <code class="code">end</code></pre><div class="info module top">
<div class="info-desc">
<p>FastCGI connector.</p>
<p><b>Remark:</b> This connector does not allow requests to be multiplexed
(and let it know to the web server via FCGI_MPXS_CONNS=0).
Multiplexing requests is seldom done by
<a href="http://www.fastcgi.com">FastCGI modules</a> and is even sometimes
impossible because of bugs in them. Moreover, multiplexing is
mostly useful if concurrent requests are handled by different
threads while this library use a single thread to process all
requests coming on a given connection. If the need is felt (speak
out!), a multithreaded connector can be built on the side of this
one.</p>
</div>
</div>
<hr width="100%">
<pre><span id="TYPEcgi"><span class="keyword">class type</span> <a href="Netcgi_fcgi.cgi-c.html">cgi</a></span> = <code class="code">object</code> <a href="Netcgi_fcgi.cgi-c.html">..</a> <code class="code">end</code></pre><div class="info">
<p>The usual <a href="Netcgi.cgi-c.html"><code class="code">Netcgi.cgi</code></a> class with FCGI specific methods.</p>
</div>
<pre><span id="VALrun"><span class="keyword">val</span> run</span> : <code class="type">?config:<a href="Netcgi.html#TYPEconfig">Netcgi.config</a> -><br> ?allow:(Unix.sockaddr -> bool) -><br> ?output_type:<a href="Netcgi.html#TYPEoutput_type">Netcgi.output_type</a> -><br> ?arg_store:<a href="Netcgi.html#TYPEarg_store">Netcgi.arg_store</a> -><br> ?exn_handler:<a href="Netcgi.html#TYPEexn_handler">Netcgi.exn_handler</a> -><br> ?socket:Unix.file_descr -><br> ?sockaddr:Unix.sockaddr -> ?port:int -> (<a href="Netcgi_fcgi.cgi-c.html">cgi</a> -> unit) -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">run f</code> register the function <code class="code">f</code> as a main function of the
script. Each call to the script will execute <code class="code">f cgi</code>. The code
outside <code class="code">f</code> will be executed only once (when the script is
loaded into memory) which allows to cache database connections,
etc.</p>
</div>
</div>
<div class="param_info"><code class="code">config</code> : Default: <a href="Netcgi.html#VALdefault_config"><code class="code">Netcgi.default_config</code></a></div>
<div class="param_info"><code class="code">allow</code> : Tells whether a connection from the socket is allowed.
Default: Use the comma separated list given in the
environment variable FCGI_WEB_SERVER_ADDRS or allow all
if it does not exist.</div>
<div class="param_info"><code class="code">output_type</code> : Default: <code class="code">`Direct ""</code></div>
<div class="param_info"><code class="code">arg_store</code> : Default: <code class="code">`Automatic</code> for all arguments.</div>
<div class="param_info"><code class="code">exn_handler</code> : See <a href="Netcgi.html#TYPEexn_handler"><code class="code">Netcgi.exn_handler</code></a>. Default: delegate
all exceptions to the default handler.</div>
<div class="param_info"><code class="code">socket</code> : is a listening socket to use. Overrides <code class="code">sockaddr</code>
and <code class="code">port</code>.</div>
<div class="param_info"><code class="code">sockaddr</code> : tells on what socket to contact the script. If
not specified, the script expects to be launched by the web
server and to communicate with it through stdin. For external
scripts (launched independently of the web server and possibly
on a different machine), set <code class="code">sockaddr</code> to the address the web
server needs to connect to to talk to the script (this address
must also be specified in the web server config file).</div>
<div class="param_info"><code class="code">port</code> : alternative way to specify <code class="code">sockaddr</code> listening to
localhost <b>only</b>. If you would like your FastCGI program to
be accessed from a different machine, use <code class="code">sockaddr</code> instead.
Your application should be ready handle SIGUSR1, used to
resquest a "graceful" process shutdown, and SIGTERM to request a
quick shutdown.</div>
<pre><span id="VALhandle_request"><span class="keyword">val</span> handle_request</span> : <code class="type"><a href="Netcgi.html#TYPEconfig">Netcgi.config</a> -><br> <a href="Netcgi.html#TYPEoutput_type">Netcgi.output_type</a> -><br> <a href="Netcgi.html#TYPEarg_store">Netcgi.arg_store</a> -><br> <a href="Netcgi.html#TYPEexn_handler">Netcgi.exn_handler</a> -><br> (<a href="Netcgi_fcgi.cgi-c.html">cgi</a> -> unit) -><br> max_conns:int -><br> log:(string -> unit) option -> Unix.file_descr -> <a href="Netcgi.html#TYPEconnection_directive">Netcgi.connection_directive</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">handle_request config output_type arg_store eh f ~max_conns
~log fd</code>: This is a lower-level interface that processes
exactly one request arriving on the existing connection <code class="code">fd</code>.</p>
<p><code class="code">max_conns</code> is passed to the FCGI client and indicates how many
connections this server can process in parallel.</p>
<p><code class="code">log</code> is the error logger function or <code class="code">None</code>, in which case
errors are passed through to the FCGI client.</p>
<p>The other arguments are just like for <code class="code">run</code>.</p>
<p>The return value indicates whether the connection can be kept
open or must be closed.</p>
</div>
</div>
<pre><span id="VALhandle_connection"><span class="keyword">val</span> handle_connection</span> : <code class="type"><a href="Netcgi.html#TYPEconfig">Netcgi.config</a> -><br> <a href="Netcgi.html#TYPEoutput_type">Netcgi.output_type</a> -><br> <a href="Netcgi.html#TYPEarg_store">Netcgi.arg_store</a> -><br> <a href="Netcgi.html#TYPEexn_handler">Netcgi.exn_handler</a> -><br> (<a href="Netcgi_fcgi.cgi-c.html">cgi</a> -> unit) -><br> max_conns:int -> one_shot:bool -> Unix.file_descr -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">handle_connection config output_type arg_store eh f ~max_conns
~one_shot fd</code>: This is a lower-level interface that processes
exactly one connection <code class="code">fd</code>. The descriptor is closed (even on
error).</p>
<p><code class="code">max_conns</code> is passed to the FCGI client and indicates how many
connections this server can process in parallel.</p>
<p><code class="code">one_shot</code>: if true, only one request is processed over this
connection, overriding any indication by the web server.</p>
<p>The other arguments are just like for <code class="code">run</code>.</p>
</div>
</div>
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