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cgi.pl
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cgi.pl
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/* $Id$
Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: [email protected]
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2002, University of Amsterdam
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, if you link this library with other files,
compiled with a Free Software compiler, to produce an executable, this
library does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
:- module(cgi,
[ cgi_get_form/1 % -ListOf Name(Value)
]).
:- use_module(library(shlib)).
:- use_foreign_library(foreign(cgi), install_cgi).
/** <module> Simple CGI form
@ingroup swi
Below is a very simple CGI script that prints the passed parameters. To
test it, compile this program using the command below, copy it to your
cgi-bin directory (or make it otherwise known as a CGI-script) and try
the query =|http://myhost.mydomain/cgi-bin/cgidemo?hello=world|=
==
% swipl -o cgidemo --goal=main --toplevel=halt -c cgidemo.pl
==
==
:- use_module(library(cgi)).
main :-
set_stream(current_output, encoding(utf8)),
cgi_get_form(Arguments),
format('Content-type: text/html; charset=UTF-8~n~n', []),
format('<html>~n', []),
format('<head>~n', []),
format('<title>Simple SWI-Prolog CGI script</title>~n', []),
format('</head>~n~n', []),
format('<body>~n', []),
format('<p>', []),
print_args(Arguments),
format('</body>~n</html>~n', []).
print_args([]).
print_args([A0|T]) :-
A0 =.. [Name, Value],
format('<b>~w</b>=<em>~w</em><br>~n', [Name, Value]),
print_args(T).
==
*/
%% cgi_get_form(-Form)
%
% Decodes standard input and the environment variables to obtain a
% list of arguments passed to the CGI script. This predicate both
% deals with the CGI *GET* method as well as the *POST* method. If
% the data cannot be obtained, an existence_error exception is
% raised.
%
% @param Form is a list of Name(Value) terms.