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Module Netcgi_apache


module Netcgi_apache: sig .. end
Netcgi Apache "mod" connector.

See the Netcgi_mod.setup section at the end of this file to know how to configure Apache.


module Apache: sig .. end
Interface to Apache API.
module Handler: sig .. end
Registering Apache handlers.
class type cgi = object .. end
The usual cgi class with an additional method to access Apache specificities.
val run : ?config:Netcgi.config ->
?output_type:Netcgi.output_type ->
?arg_store:Netcgi.arg_store ->
?exn_handler:Netcgi.exn_handler -> (cgi -> unit) -> unit
run f register the function f as a main function of the script. Each call to the script will execute f cgi. The code outside f will be executed only once (when the script is loaded into memory) which allows to cache database connections, etc. (The code stays in memory unless you restart the server or the file changes on disk.)
config : Default: Netcgi.default_config
output_type : Default: `Direct ""
arg_store : Default: `Automatic for all arguments.
exn_handler : See Netcgi.exn_handler. Default: delegate all exceptions to the default handler.

Setup

Apache 1.3

You need to put in an Apache configuration file (we recommend /etc/apache/conf.d/netcgi_apache.conf) the following lines:

    LoadModule netcgi_module /usr/lib/apache/1.3/mod_netcgi_apache.so
    NetcgiLoad pcre/pcre.cma
    NetcgiLoad netsys/netsys.cma
    NetcgiLoad netstring/netstring.cma
    NetcgiLoad str.cma
    NetcgiLoad netcgi2/netcgi.cma
    NetcgiLoad netcgi2-apache/netcgi_apache.cma
   

Apache 2.2 or later

You need to put in an Apache configuration file (we recommend /etc/apache2/mods-available/netcgi_apache.load) the following line:

    LoadModule netcgi_module /usr/lib/apache2/modules/mod_netcgi_apache.so
    NetcgiLoad pcre/pcre.cma
    NetcgiLoad netsys/netsys.cma
    NetcgiLoad netstring/netstring.cma
    NetcgiLoad str.cma
    NetcgiLoad netcgi2/netcgi.cma
    NetcgiLoad netcgi2-apache/netcgi_apache.cma
   
and make a symbolic link from /etc/apache2/mods-enabled/ to it to actually enable it. Subsequent configuration is recommended to be in /etc/apache2/mods-available/netcgi_apache.conf (also to be linked to /etc/apache2/mods-enabled/).

Loading libraries

If your scripts depend on other libraries, you need to load them using NetcgiLoad. More specifically, if your library is x.cma and is in the subdirectory y of standard OCaml directory (given by `ocamlc -where`), use

    NetcgiLoad y/x.cma
   
If x.cma is not in a subdirectory of `ocamlc -where`, you need to specify the full path.

Installing scripts

You need also to tell Apache how to detect whether a script is to be handled by netcgi_apache, either by putting them in a special directory (here /caml-bin/):

    Alias /caml-bin/ /path/to/your/scripts/
    <Location /caml-bin>
      SetHandler ocaml-bytecode
      NetcgiHandler Netcgi_apache.bytecode
      Options ExecCGI
      Allow from all
    </Location>
   
or by distinguishing them by their extension (here .cma):
    NetcgiHandler Netcgi_apache.bytecode
    AddHandler ocaml-bytecode .cma
   

Compiling scripts

If your script reside in the file x.ml, compile it to x.cmo or x.cma. If your script depends on other libraries, you may either load them with NetcgiLoad (see above) or include them in x.cma. You need not include the netcgi_apache.cma, netcgi.cma, netstring.cma, netsys.cma, or pcre.cma modules as these are already loaded into Apache (see above).

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