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/* example5.c --- Example TLD checking.
* Copyright (C) 2004-2016 Simon Josefsson
*
* This file is part of GNU Libidn.
*
* 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 3 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Get stringprep_locale_charset, etc. */
#include <stringprep.h>
/* Get idna_to_ascii_8z, etc. */
#include <idna.h>
/* Get tld_check_4z. */
#include <tld.h>
/*
* Compiling using libtool and pkg-config is recommended:
*
* $ libtool cc -o example5 example5.c `pkg-config --cflags --libs libidn`
* $ ./example5
* Input domain encoded as `UTF-8': fooß.no
* Read string (length 8): 66 6f 6f c3 9f 2e 6e 6f
* ToASCII string (length 8): fooss.no
* ToUnicode string: U+0066 U+006f U+006f U+0073 U+0073 U+002e U+006e U+006f
* Domain accepted by TLD check
*
* $ ./example5
* Input domain encoded as `UTF-8': gr€€n.no
* Read string (length 12): 67 72 e2 82 ac e2 82 ac 6e 2e 6e 6f
* ToASCII string (length 16): xn--grn-l50aa.no
* ToUnicode string: U+0067 U+0072 U+20ac U+20ac U+006e U+002e U+006e U+006f
* Domain rejected by TLD check, Unicode position 2
*
*/
int
main (void)
{
char buf[BUFSIZ];
char *p;
uint32_t *r;
int rc;
size_t errpos, i;
printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
fflush (stdout);
if (!fgets (buf, BUFSIZ, stdin))
perror ("fgets");
buf[strlen (buf) - 1] = '\0';
printf ("Read string (length %ld): ", (long int) strlen (buf));
for (i = 0; i < strlen (buf); i++)
printf ("%02x ", (unsigned) buf[i] & 0xFF);
printf ("\n");
p = stringprep_locale_to_utf8 (buf);
if (p)
{
strcpy (buf, p);
free (p);
}
else
printf ("Could not convert string to UTF-8, continuing anyway...\n");
rc = idna_to_ascii_8z (buf, &p, 0);
if (rc != IDNA_SUCCESS)
{
printf ("idna_to_ascii_8z failed (%d): %s\n", rc, idna_strerror (rc));
return 2;
}
printf ("ToASCII string (length %ld): %s\n", (long int) strlen (p), p);
rc = idna_to_unicode_8z4z (p, &r, 0);
free (p);
if (rc != IDNA_SUCCESS)
{
printf ("idna_to_unicode_8z4z failed (%d): %s\n",
rc, idna_strerror (rc));
return 2;
}
printf ("ToUnicode string: ");
for (i = 0; r[i]; i++)
printf ("U+%04x ", r[i]);
printf ("\n");
rc = tld_check_4z (r, &errpos, NULL);
free (r);
if (rc == TLD_INVALID)
{
printf ("Domain rejected by TLD check, Unicode position %ld\n", (long int) errpos);
return 1;
}
else if (rc != TLD_SUCCESS)
{
printf ("tld_check_4z() failed (%d): %s\n", rc, tld_strerror (rc));
return 2;
}
printf ("Domain accepted by TLD check\n");
return 0;
}