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cgi.pl
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cgi.pl
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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: [email protected]
WWW: http://www.swi-prolog.org
Copyright (c) 2000-2022, University of Amsterdam
CWI, Amsterdam
SWI-Prolog Solutions b.v.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
:- module(cgi,
[ cgi_get_form/1 % -ListOf Name(Value)
]).
:- use_foreign_library(foreign(cgi)).
/** <module> Read CGI parameters
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.