examples/example5.c

   1 /* example5.c --- Example TLD checking.
   2  * Copyright (C) 2004  Simon Josefsson
   3  *
   4  * This file is part of GNU Libidn.
   5  *
   6  * GNU Libidn is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * GNU Libidn is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with GNU Libidn; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 /* Get stringprep_locale_charset, etc. */
  27 #include <stringprep.h>
  28
  29 /* Get idna_to_ascii_8z, etc. */
  30 #include <idna.h>
  31
  32 /* Get tld_check_4z. */
  33 #include <tld.h>
  34
  35 /*
  36  * Compiling using libtool and pkg-config is recommended:
  37  *
  38  * $ libtool cc -o example5 example5.c `pkg-config --cflags --libs libidn`
  39  * $ ./example5
  40  * Input domain encoded as `UTF-8': fooß.no
  41  * Read string (length 8): 66 6f 6f c3 9f 2e 6e 6f
  42  * ToASCII string (length 8): fooss.no
  43  * ToUnicode string: U+0066 U+006f U+006f U+0073 U+0073 U+002e U+006e U+006f
  44  * Domain accepted by TLD check
  45  *
  46  * $ ./example5
  47  * Input domain encoded as `UTF-8': gr€€n.no
  48  * Read string (length 12): 67 72 e2 82 ac e2 82 ac 6e 2e 6e 6f
  49  * ToASCII string (length 16): xn--grn-l50aa.no
  50  * ToUnicode string: U+0067 U+0072 U+20ac U+20ac U+006e U+002e U+006e U+006f
  51  * Domain rejected by TLD check, Unicode position 2
  52  *
  53  */
  54
  55 int
  56 main (int argc, char *argv[])
  57 {
  58   char buf[BUFSIZ];
  59   char *p;
  60   uint32_t *r;
  61   int rc;
  62   size_t errpos, i;
  63
  64   printf ("Input domain encoded as `%s': ", stringprep_locale_charset ());
  65   fflush (stdout);
  66   fgets (buf, BUFSIZ, stdin);
  67   buf[strlen (buf) - 1] = '\0';
  68
  69   printf ("Read string (length %d): ", strlen (buf));
  70   for (i = 0; i < strlen (buf); i++)
  71     printf ("%02x ", buf[i] & 0xFF);
  72   printf ("\n");
  73
  74   p = stringprep_locale_to_utf8 (buf);
  75   if (p)
  76     {
  77       strcpy (buf, p);
  78       free (p);
  79     }
  80   else
  81     printf ("Could not convert string to UTF-8, continuing anyway...\n");
  82
  83   rc = idna_to_ascii_8z (buf, &p, 0);
  84   if (rc != IDNA_SUCCESS)
  85     {
  86       printf ("idna_to_ascii_8z failed (%d)...\n", rc);
  87       return 2;
  88     }
  89
  90   printf ("ToASCII string (length %d): %s\n", strlen (p), p);
  91
  92   rc = idna_to_unicode_8z4z (p, &r, 0);
  93   free (p);
  94   if (rc != IDNA_SUCCESS)
  95     {
  96       printf ("idna_to_unicode_8z4z failed (%d)...\n", rc);
  97       return 2;
  98     }
  99
 100   printf ("ToUnicode string: ");
 101   for (i = 0; r[i]; i++)
 102     printf ("U+%04x ", r[i]);
 103   printf ("\n");
 104
 105   rc = tld_check_4z (r, &errpos, NULL);
 106   free (r);
 107   if (rc == TLD_INVALID)
 108     {
 109       printf ("Domain rejected by TLD check, Unicode position %d\n", errpos);
 110       return 1;
 111     }
 112   else if (rc != TLD_SUCCESS)
 113     {
 114       printf ("tld_check_4z() failed... %d\n", rc);
 115       return 2;
 116     }
 117
 118   printf ("Domain accepted by TLD check\n");
 119
 120   return 0;
 121 }