void Cdlg_make_torrent::OnSave()
{
if (!UpdateData())
return;
m_name.TrimRight(" ");
m_tracker.TrimRight(" ");
CFileDialog dlg(false, "torrent", m_name + ".torrent", OFN_ENABLESIZING | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST, "Torrents|*.torrent|", this);
if (IDOK != dlg.DoModal())
return;
CWaitCursor wc;
AfxGetApp()->WriteProfileString(m_strRegStore, "tracker", m_tracker);
AfxGetApp()->WriteProfileString(m_strRegStore, "trackers", m_trackers);
AfxGetApp()->WriteProfileInt(m_strRegStore, "use_merkle", m_use_merkle);
int cb_piece = 1 << 20;
if (!m_use_merkle)
{
long long cb_total = 0;
for (t_map::const_iterator i = m_map.begin(); i != m_map.end(); i++)
cb_total += i->second.size;
cb_piece = 256 << 10;
while (cb_total / cb_piece > 4 << 10)
cb_piece <<= 1;
}
typedef std::set<std::string> t_set;
t_set set;
for (t_map::const_iterator i = m_map.begin(); i != m_map.end(); i++)
set.insert(i->second.name);
Cbvalue files;
std::string pieces;
Cvirtual_binary d;
byte* w = d.write_start(cb_piece);
for (t_set::const_iterator i = set.begin(); i != set.end(); i++)
{
int f = open(i->c_str(), _O_BINARY | _O_RDONLY);
if (!f)
continue;
long long cb_f = 0;
std::string merkle_hash;
int cb_d;
if (m_use_merkle)
{
typedef std::map<int, std::string> t_map;
t_map map;
char d[1025];
while (cb_d = read(f, d + 1, 1024))
{
if (cb_d < 0)
break;
*d = 0;
std::string h = Csha1(const_memory_range(d, cb_d + 1)).read();
*d = 1;
int i;
for (i = 0; map.find(i) != map.end(); i++)
{
memcpy(d + 1, map.find(i)->second.c_str(), 20);
memcpy(d + 21, h.c_str(), 20);
h = Csha1(const_memory_range(d, 41)).read();
map.erase(i);
}
map[i] = h;
cb_f += cb_d;
}
*d = 1;
while (map.size() > 1)
{
memcpy(d + 21, map.begin()->second.c_str(), 20);
map.erase(map.begin());
memcpy(d + 1, map.begin()->second.c_str(), 20);
map.erase(map.begin());
map[0] = Csha1(const_memory_range(d, 41)).read();
}
if (!map.empty())
merkle_hash = map.begin()->second;
}
else
{
while (cb_d = read(f, w, d.end() - w))
{
if (cb_d < 0)
break;
w += cb_d;
if (w == d.end())
{
pieces += Csha1(const_memory_range(d, w - d)).read();
w = d.data_edit();
}
cb_f += cb_d;
}
}
close(f);
files.l(merkle_hash.empty()
? Cbvalue().d(bts_length, cb_f).d(bts_path, Cbvalue().l(base_name(*i)))
: Cbvalue().d(bts_merkle_hash, merkle_hash).d(bts_length, cb_f).d(bts_path, Cbvalue().l(base_name(*i))));
}
if (w != d)
pieces += Csha1(const_memory_range(d, w - d)).read();
Cbvalue info;
info.d(bts_piece_length, cb_piece);
if (!pieces.empty())
info.d(bts_pieces, pieces);
if (m_map.size() == 1)
{
if (m_use_merkle)
info.d(bts_merkle_hash, files.l().front()[bts_merkle_hash]);
info.d(bts_length, files.l().front()[bts_length]);
info.d(bts_name, files.l().front()[bts_path].l().front());
}
else
{
info.d(bts_files, files);
info.d(bts_name, static_cast<std::string>(m_name));
}
Cbvalue torrent;
torrent.d(bts_announce, static_cast<std::string>(m_tracker));
if (!m_trackers.IsEmpty())
torrent.d(bts_announce_list, parse_trackers(static_cast<std::string>(m_trackers)));
torrent.d(bts_info, info);
Cvirtual_binary s = torrent.read();
if (m_use_merkle)
s = gzip(s);
s.save(static_cast<std::string>(dlg.GetPathName()));
m_torrent_fname = dlg.GetPathName();
EndDialog(IDOK);
}
int main(int argc, char* argv[])
{
time_t t = time(NULL);
if (argc < 2)
{
std::cerr << "Usage: " << argv[0] << " <file> <tracker> [--v1]" << std::endl;
return 1;
}
std::string tracker = argc >= 3 ? argv[2] : "udp://localhost:2710";
bool use_merkle = argc >= 4 ? strcmp(argv[3], "--v1") : true; // set to false for a non-merkle torrent
insert(argv[1]);
// use 1 mbyte pieces by default
int cb_piece = 1 << 20;
if (!use_merkle)
{
// find optimal piece size for a non-merkle torrent
long long cb_total = 0;
for (t_map::const_iterator i = g_map.begin(); i != g_map.end(); i++)
cb_total += i->second.size;
cb_piece = 256 << 10;
while (cb_total / cb_piece > 4 << 10)
cb_piece <<= 1;
}
Cbvalue files;
std::string pieces;
Cvirtual_binary d;
byte* w = d.write_start(cb_piece);
for (t_map::const_iterator i = g_map.begin(); i != g_map.end(); i++)
{
int f = open(i->second.name.c_str(), O_BINARY | O_RDONLY);
if (!f)
continue;
long long cb_f = 0;
std::string merkle_hash;
int cb_d;
if (use_merkle)
{
// calculate merkle root hash as explained in XBT Make Merkle Tree.cpp
typedef std::map<int, std::string> t_map;
t_map map;
char d[1025];
while (cb_d = read(f, d + 1, 1024))
{
if (cb_d < 0)
break;
*d = 0;
std::string h = Csha1(const_memory_range(d, cb_d + 1)).read();
*d = 1;
int i;
for (i = 0; map.find(i) != map.end(); i++)
{
memcpy(d + 1, map.find(i)->second.c_str(), 20);
memcpy(d + 21, h.c_str(), 20);
h = Csha1(const_memory_range(d, 41)).read();
map.erase(i);
}
map[i] = h;
cb_f += cb_d;
}
*d = 1;
while (map.size() > 1)
{
memcpy(d + 21, map.begin()->second.c_str(), 20);
map.erase(map.begin());
memcpy(d + 1, map.begin()->second.c_str(), 20);
map.erase(map.begin());
map[0] = Csha1(const_memory_range(d, 41)).read();
}
if (!map.empty())
merkle_hash = map.begin()->second;
}
else
{
// calculate piece hashes
while (cb_d = read(f, w, d.data_end() - w))
{
if (cb_d < 0)
break;
w += cb_d;
if (w == d.data_end())
{
pieces += Csha1(const_memory_range(d, w - d)).read();
w = d.data_edit();
}
cb_f += cb_d;
}
}
close(f);
// add file to files key
files.l(merkle_hash.empty()
? Cbvalue().d(bts_length, cb_f).d(bts_path, Cbvalue().l(base_name(i->second.name)))
: Cbvalue().d(bts_merkle_hash, merkle_hash).d(bts_length, cb_f).d(bts_path, Cbvalue().l(base_name(i->second.name))));
}
if (w != d)
pieces += Csha1(const_memory_range(d, w - d)).read();
Cbvalue info;
info.d(bts_piece_length, cb_piece);
if (!pieces.empty())
info.d(bts_pieces, pieces);
if (g_map.size() == 1)
{
// single-file torrent
if (use_merkle)
info.d(bts_merkle_hash, files.l().front().d(bts_merkle_hash));
info.d(bts_length, files.l().front().d(bts_length));
info.d(bts_name, files.l().front().d(bts_path).l().front());
}
else
{
// multi-file torrent
info.d(bts_files, files);
info.d(bts_name, g_name);
}
Cbvalue torrent;
torrent.d(bts_announce, tracker);
torrent.d(bts_info, info);
Cvirtual_binary s = torrent.read();
if (use_merkle)
s = gzip(s);
s.save(g_name + ".torrent");
std::cout << time(NULL) - t << " s" << std::endl;
return 0;
}
