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/* $Id: cgi.c,v 1.3 2002/02/01 15:47:00 jan Exp $
Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: jan@swi.psy.uva.nl
WWW: http://www.swi-prolog.org
Copyright (C): 1985-2002, University of Amsterdam
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "form.h"
#include <SWI-Prolog.h>
#include <string.h>
#include <stdlib.h>
#include "clib.h"
static int
isinteger(const char *s, long *val, int len)
{ char *e;
if ( len < 0 )
len = strlen(s);
if ( len == 0 )
return FALSE;
*val = strtol(s, &e, 10);
if ( e == s+len )
return TRUE;
return FALSE;
}
static int
isfloat(const char *s, double *val, int len)
{ char *e;
if ( len < 0 )
len = strlen(s);
if ( len == 0 )
return FALSE;
*val = strtod(s, &e);
if ( e == s+len )
return TRUE;
return FALSE;
}
static int
add_to_form(const char *name, const char *value, void *closure)
{ term_t head = PL_new_term_ref();
term_t tail = (term_t) closure;
term_t val = PL_new_term_ref();
long vl;
double vf;
if ( isinteger(value, &vl, strlen(value)) )
PL_put_integer(val, vl);
else if ( isfloat(value, &vf, strlen(value)) )
PL_put_float(val, vf);
else
PL_put_atom_chars(val, value);
if ( !PL_unify_list(tail, head, tail) ||
!PL_unify_term(head,
PL_FUNCTOR, PL_new_functor(PL_new_atom(name), 1),
PL_TERM, val) )
return FALSE;
return TRUE;
}
static int
mp_add_to_form(const char *name, const char *value, int len,
const char *file, void *closure)
{ term_t head = PL_new_term_ref();
term_t tail = (term_t) closure;
term_t val = PL_new_term_ref();
long vl;
double vf;
if ( isinteger(value, &vl, len) )
PL_put_integer(val, vl);
else if ( isfloat(value, &vf, len) )
PL_put_float(val, vf);
else
PL_put_atom_nchars(val, len, value);
if ( !PL_unify_list(tail, head, tail) ||
!PL_unify_term(head,
PL_FUNCTOR, PL_new_functor(PL_new_atom(name), 1),
PL_TERM, val) )
return FALSE;
return TRUE;
}
static foreign_t
pl_cgi_get_form(term_t form)
{ int len;
char *data = get_raw_form_data(&len);
term_t list = PL_copy_term_ref(form);
char *ct, *boundary;
if ( !data )
{ term_t ctx = PL_new_term_ref();
PL_put_nil(ctx);
return pl_error("cgi_get_form", 1, "no data?",
ERR_EXISTENCE, "cgi_form", ctx);
}
if ( (ct = getenv("CONTENT_TYPE")) &&
(boundary = strstr(ct, "boundary=")) )
{ boundary = strchr(boundary, '=')+1;
break_multipart(data, len, boundary, mp_add_to_form, (void *)list);
} else
{ break_form_argument(data, add_to_form, (void *)list);
}
return PL_unify_nil(list);
}
install_t
install_cgi()
{ PL_register_foreign("cgi_get_form", 1, pl_cgi_get_form, 0);
}
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