src/uri.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "config.h"
  21 #include "uri.h"
  22
  23 #include <glib.h>
  24
  25 #include <assert.h>
  26 #include <string.h>
  27
  28 bool uri_has_scheme(const char *uri)
  29 {
  30         return strstr(uri, "://") != NULL;
  31 }
  32
  33 /* suffixes should be ascii only characters */
  34 const char *
  35 uri_get_suffix(const char *uri)
  36 {
  37         const char *suffix = strrchr(g_basename(uri), '.');
  38         if (suffix == NULL)
  39                 return NULL;
  40
  41         ++suffix;
  42
  43         if (strchr(suffix, '/') != NULL)
  44                 return NULL;
  45
  46         return suffix;
  47 }
  48
  49 static const char *
  50 verify_uri_segment(const char *p)
  51 {
  52         const char *q;
  53
  54         unsigned dots = 0;
  55         while (*p == '.')
  56                 ++p;
  57         if (dots <= 2 && (*p == 0 || *p == '/'))
  58                 return NULL;
  59
  60         q = strchr(p + 1, '/');
  61         return q != NULL ? q : "";
  62 }
  63
  64 bool
  65 uri_safe_local(const char *uri)
  66 {
  67         while (true) {
  68                 uri = verify_uri_segment(uri);
  69                 if (uri == NULL)
  70                         return false;
  71
  72                 if (*uri == 0)
  73                         return true;
  74
  75                 assert(*uri == '/');
  76
  77                 ++uri;
  78         }
  79 }
  80
  81 char *
  82 uri_remove_auth(const char *uri)
  83 {
  84         const char *auth, *slash, *at;
  85         char *p;
  86
  87         if (strncmp(uri, "http://", 7) == 0)
  88                 auth = uri + 7;
  89         else if (strncmp(uri, "https://", 8) == 0)
  90                 auth = uri + 8;
  91         else
  92                 /* unrecognized URI */
  93                 return NULL;
  94
  95         slash = strchr(auth, '/');
  96         if (slash == NULL)
  97                 slash = auth + strlen(auth);
  98
  99         at = memchr(auth, '@', slash - auth);
 100         if (at == NULL)
 101                 /* no auth info present, do nothing */
 102                 return NULL;
 103
 104         /* duplicate the full URI and then delete the auth
 105            information */
 106         p = g_strdup(uri);
 107         memmove(p + (auth - uri), p + (at + 1 - uri),
 108                 strlen(at));
 109
 110         return p;
 111 }