254 lines
8.9 KiB
Python
254 lines
8.9 KiB
Python
import asyncio
|
|
import binascii
|
|
import os
|
|
import logging
|
|
import random
|
|
from hashlib import sha1
|
|
from tempfile import mkdtemp
|
|
from typing import Optional
|
|
|
|
import libtorrent
|
|
|
|
|
|
log = logging.getLogger(__name__)
|
|
DEFAULT_FLAGS = ( # fixme: somehow the logic here is inverted?
|
|
libtorrent.add_torrent_params_flags_t.flag_auto_managed
|
|
| libtorrent.add_torrent_params_flags_t.flag_update_subscribe
|
|
)
|
|
|
|
|
|
class TorrentHandle:
|
|
def __init__(self, loop, executor, handle):
|
|
self._loop = loop
|
|
self._executor = executor
|
|
self._handle: libtorrent.torrent_handle = handle
|
|
self.started = asyncio.Event(loop=loop)
|
|
self.finished = asyncio.Event(loop=loop)
|
|
self.metadata_completed = asyncio.Event(loop=loop)
|
|
self.size = 0
|
|
self.total_wanted_done = 0
|
|
self.name = ''
|
|
self.tasks = []
|
|
self.torrent_file: Optional[libtorrent.file_storage] = None
|
|
self._base_path = None
|
|
self._handle.set_sequential_download(1)
|
|
|
|
@property
|
|
def largest_file(self) -> Optional[str]:
|
|
if not self.torrent_file:
|
|
return None
|
|
index = self.largest_file_index
|
|
return os.path.join(self._base_path, self.torrent_file.at(index).path)
|
|
|
|
@property
|
|
def largest_file_index(self):
|
|
largest_size, index = 0, 0
|
|
for file_num in range(self.torrent_file.num_files()):
|
|
if self.torrent_file.file_size(file_num) > largest_size:
|
|
largest_size = self.torrent_file.file_size(file_num)
|
|
index = file_num
|
|
return index
|
|
|
|
def stop_tasks(self):
|
|
while self.tasks:
|
|
self.tasks.pop().cancel()
|
|
|
|
def _show_status(self):
|
|
# fixme: cleanup
|
|
if not self._handle.is_valid():
|
|
return
|
|
status = self._handle.status()
|
|
if status.has_metadata:
|
|
self.size = status.total_wanted
|
|
self.total_wanted_done = status.total_wanted_done
|
|
self.name = status.name
|
|
if not self.metadata_completed.is_set():
|
|
self.metadata_completed.set()
|
|
log.info("Metadata completed for btih:%s - %s", status.info_hash, self.name)
|
|
self.torrent_file = self._handle.get_torrent_info().files()
|
|
self._base_path = status.save_path
|
|
first_piece = self.torrent_file.at(self.largest_file_index).offset
|
|
if not self.started.is_set():
|
|
if self._handle.have_piece(first_piece):
|
|
self.started.set()
|
|
else:
|
|
# prioritize it
|
|
self._handle.set_piece_deadline(first_piece, 100)
|
|
if not status.is_seeding:
|
|
log.debug('%.2f%% complete (down: %.1f kB/s up: %.1f kB/s peers: %d seeds: %d) %s - %s',
|
|
status.progress * 100, status.download_rate / 1000, status.upload_rate / 1000,
|
|
status.num_peers, status.num_seeds, status.state, status.save_path)
|
|
elif not self.finished.is_set():
|
|
self.finished.set()
|
|
log.info("Torrent finished: %s", self.name)
|
|
|
|
async def status_loop(self):
|
|
while True:
|
|
self._show_status()
|
|
if self.finished.is_set():
|
|
break
|
|
await asyncio.sleep(0.1, loop=self._loop)
|
|
|
|
async def pause(self):
|
|
await self._loop.run_in_executor(
|
|
self._executor, self._handle.pause
|
|
)
|
|
|
|
async def resume(self):
|
|
await self._loop.run_in_executor(
|
|
self._executor, lambda: self._handle.resume() # pylint: disable=unnecessary-lambda
|
|
)
|
|
|
|
|
|
class TorrentSession:
|
|
def __init__(self, loop, executor):
|
|
self._loop = loop
|
|
self._executor = executor
|
|
self._session: Optional[libtorrent.session] = None
|
|
self._handles = {}
|
|
self.tasks = []
|
|
self.wait_start = True
|
|
|
|
async def add_fake_torrent(self):
|
|
tmpdir = mkdtemp()
|
|
info, btih = _create_fake_torrent(tmpdir)
|
|
flags = libtorrent.add_torrent_params_flags_t.flag_seed_mode
|
|
handle = self._session.add_torrent({
|
|
'ti': info, 'save_path': tmpdir, 'flags': flags
|
|
})
|
|
self._handles[btih] = TorrentHandle(self._loop, self._executor, handle)
|
|
return btih
|
|
|
|
async def bind(self, interface: str = '0.0.0.0', port: int = 10889):
|
|
settings = {
|
|
'listen_interfaces': f"{interface}:{port}",
|
|
'enable_natpmp': False,
|
|
'enable_upnp': False
|
|
}
|
|
self._session = await self._loop.run_in_executor(
|
|
self._executor, libtorrent.session, settings # pylint: disable=c-extension-no-member
|
|
)
|
|
self.tasks.append(self._loop.create_task(self.process_alerts()))
|
|
|
|
def stop(self):
|
|
while self.tasks:
|
|
self.tasks.pop().cancel()
|
|
self._session.save_state()
|
|
self._session.pause()
|
|
self._session.stop_dht()
|
|
self._session.stop_lsd()
|
|
self._session.stop_natpmp()
|
|
self._session.stop_upnp()
|
|
self._session = None
|
|
|
|
def _pop_alerts(self):
|
|
for alert in self._session.pop_alerts():
|
|
log.info("torrent alert: %s", alert)
|
|
|
|
async def process_alerts(self):
|
|
while True:
|
|
await self._loop.run_in_executor(
|
|
self._executor, self._pop_alerts
|
|
)
|
|
await asyncio.sleep(1, loop=self._loop)
|
|
|
|
async def pause(self):
|
|
await self._loop.run_in_executor(
|
|
self._executor, lambda: self._session.save_state() # pylint: disable=unnecessary-lambda
|
|
)
|
|
await self._loop.run_in_executor(
|
|
self._executor, lambda: self._session.pause() # pylint: disable=unnecessary-lambda
|
|
)
|
|
|
|
async def resume(self):
|
|
await self._loop.run_in_executor(
|
|
self._executor, self._session.resume
|
|
)
|
|
|
|
def _add_torrent(self, btih: str, download_directory: Optional[str]):
|
|
params = {'info_hash': binascii.unhexlify(btih.encode()), 'flags': DEFAULT_FLAGS}
|
|
if download_directory:
|
|
params['save_path'] = download_directory
|
|
handle = self._session.add_torrent(params)
|
|
handle.force_dht_announce()
|
|
self._handles[btih] = TorrentHandle(self._loop, self._executor, handle)
|
|
|
|
def full_path(self, btih):
|
|
return self._handles[btih].largest_file
|
|
|
|
async def add_torrent(self, btih, download_path):
|
|
await self._loop.run_in_executor(
|
|
self._executor, self._add_torrent, btih, download_path
|
|
)
|
|
self._handles[btih].tasks.append(self._loop.create_task(self._handles[btih].status_loop()))
|
|
await self._handles[btih].metadata_completed.wait()
|
|
if self.wait_start:
|
|
# fixme: temporary until we add streaming support, otherwise playback fails!
|
|
await self._handles[btih].started.wait()
|
|
|
|
def remove_torrent(self, btih, remove_files=False):
|
|
if btih in self._handles:
|
|
handle = self._handles[btih]
|
|
handle.stop_tasks()
|
|
self._session.remove_torrent(handle._handle, 1 if remove_files else 0)
|
|
self._handles.pop(btih)
|
|
|
|
async def save_file(self, btih, download_directory):
|
|
handle = self._handles[btih]
|
|
await handle.resume()
|
|
|
|
def get_size(self, btih):
|
|
return self._handles[btih].size
|
|
|
|
def get_name(self, btih):
|
|
return self._handles[btih].name
|
|
|
|
def get_downloaded(self, btih):
|
|
return self._handles[btih].total_wanted_done
|
|
|
|
def is_completed(self, btih):
|
|
return self._handles[btih].finished.is_set()
|
|
|
|
|
|
def get_magnet_uri(btih):
|
|
return f"magnet:?xt=urn:btih:{btih}"
|
|
|
|
|
|
def _create_fake_torrent(tmpdir):
|
|
# beware, that's just for testing
|
|
path = os.path.join(tmpdir, 'tmp')
|
|
with open(path, 'wb') as myfile:
|
|
size = myfile.write(bytes([random.randint(0, 255) for _ in range(40)]) * 1024)
|
|
file_storage = libtorrent.file_storage()
|
|
file_storage.add_file('tmp', size)
|
|
t = libtorrent.create_torrent(file_storage, 0, 4 * 1024 * 1024)
|
|
libtorrent.set_piece_hashes(t, tmpdir)
|
|
info = libtorrent.torrent_info(t.generate())
|
|
btih = sha1(info.metadata()).hexdigest()
|
|
return info, btih
|
|
|
|
|
|
async def main():
|
|
if os.path.exists("~/Downloads/ubuntu-18.04.3-live-server-amd64.torrent"):
|
|
os.remove("~/Downloads/ubuntu-18.04.3-live-server-amd64.torrent")
|
|
if os.path.exists("~/Downloads/ubuntu-18.04.3-live-server-amd64.iso"):
|
|
os.remove("~/Downloads/ubuntu-18.04.3-live-server-amd64.iso")
|
|
|
|
btih = "dd8255ecdc7ca55fb0bbf81323d87062db1f6d1c"
|
|
|
|
executor = None
|
|
session = TorrentSession(asyncio.get_event_loop(), executor)
|
|
session2 = TorrentSession(asyncio.get_event_loop(), executor)
|
|
await session.bind('localhost', port=4040)
|
|
await session2.bind('localhost', port=4041)
|
|
btih = await session.add_fake_torrent()
|
|
session2._session.add_dht_node(('localhost', 4040))
|
|
await session2.add_torrent(btih, "/tmp/down")
|
|
while True:
|
|
await asyncio.sleep(100)
|
|
await session.pause()
|
|
executor.shutdown()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
asyncio.run(main())
|