src/magnet_uri.cpp

   1 /*
   2
   3 Copyright (c) 2007, Arvid Norberg
   4 All rights reserved.
   5
   6 Redistribution and use in source and binary forms, with or without
   7 modification, are permitted provided that the following conditions
   8 are met:
   9
  10     * Redistributions of source code must retain the above copyright
  11       notice, this list of conditions and the following disclaimer.
  12     * Redistributions in binary form must reproduce the above copyright
  13       notice, this list of conditions and the following disclaimer in
  14       the documentation and/or other materials provided with the distribution.
  15     * Neither the name of the author nor the names of its
  16       contributors may be used to endorse or promote products derived
  17       from this software without specific prior written permission.
  18
  19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29 POSSIBILITY OF SUCH DAMAGE.
  30
  31 */
  32
  33 #include "libtorrent/magnet_uri.hpp"
  34 #include "libtorrent/session.hpp"
  35 #include "libtorrent/torrent_handle.hpp"
  36 #include "libtorrent/escape_string.hpp"
  37
  38 #include <string>
  39 #include <sstream>
  40
  41 namespace libtorrent
  42 {
  43         std::string make_magnet_uri(torrent_handle const& handle)
  44         {
  45                 std::stringstream ret;
  46                 if (!handle.is_valid()) return ret.str();
  47
  48                 std::string name = handle.name();
  49
  50                 ret << "magnet:?xt=urn:btih:" << base32encode(
  51                         std::string((char*)handle.info_hash().begin(), 20));
  52                 if (!name.empty())
  53                         ret << "&dn=" << escape_string(name.c_str(), name.length());
  54                 torrent_status st = handle.status();
  55                 if (!st.current_tracker.empty())
  56                 {
  57                         ret << "&tr=" << escape_string(st.current_tracker.c_str()
  58                                 , st.current_tracker.length());
  59                 }
  60                 else
  61                 {
  62                         std::vector<announce_entry> const& tr = handle.trackers();
  63                         if (!tr.empty())
  64                         {
  65                                 ret << "&tr=" << escape_string(tr[0].url.c_str()
  66                                         , tr[0].url.length());
  67                         }
  68                 }
  69                 return ret.str();
  70         }
  71
  72 #ifndef TORRENT_NO_DEPRECATE
  73         torrent_handle add_magnet_uri(session& ses, std::string const& uri
  74                 , fs::path const& save_path
  75                 , storage_mode_t storage_mode
  76                 , bool paused
  77                 , storage_constructor_type sc
  78                 , void* userdata)
  79         {
  80                 std::string name;
  81                 std::string tracker;
  82
  83                 boost::optional<std::string> display_name = url_has_argument(uri, "dn");
  84                 if (display_name) name = unescape_string(display_name->c_str());
  85                 boost::optional<std::string> tracker_string = url_has_argument(uri, "tr");
  86                 if (tracker_string) tracker = unescape_string(tracker_string->c_str());
  87
  88                 boost::optional<std::string> btih = url_has_argument(uri, "xt");
  89                 if (!btih) return torrent_handle();
  90
  91                 if (btih->compare(0, 9, "urn:btih:") != 0) return torrent_handle();
  92
  93                 sha1_hash info_hash(base32decode(btih->substr(9)));
  94
  95                 return ses.add_torrent(tracker.empty() ? 0 : tracker.c_str(), info_hash
  96                         , name.empty() ? 0 : name.c_str(), save_path, entry()
  97                         , storage_mode, paused, sc, userdata);
  98         }
  99 #endif
 100
 101         torrent_handle add_magnet_uri(session& ses, std::string const& uri
 102                 , add_torrent_params p)
 103         {
 104                 std::string name;
 105                 std::string tracker;
 106
 107                 boost::optional<std::string> display_name = url_has_argument(uri, "dn");
 108                 if (display_name) name = unescape_string(display_name->c_str());
 109                 boost::optional<std::string> tracker_string = url_has_argument(uri, "tr");
 110                 if (tracker_string) tracker = unescape_string(tracker_string->c_str());
 111
 112                 boost::optional<std::string> btih = url_has_argument(uri, "xt");
 113                 if (!btih) return torrent_handle();
 114
 115                 if (btih->compare(0, 9, "urn:btih:") != 0) return torrent_handle();
 116
 117                 sha1_hash info_hash(base32decode(btih->substr(9)));
 118
 119                 if (!tracker.empty()) p.tracker_url = tracker.c_str();
 120                 p.info_hash = info_hash;
 121                 if (!name.empty()) p.name = name.c_str();
 122                 return ses.add_torrent(p);
 123         }
 124 }
 125
 126