416 lines
15 KiB
Python
416 lines
15 KiB
Python
import enum
|
|
import os
|
|
import re
|
|
import select
|
|
import subprocess
|
|
import threading
|
|
import time
|
|
|
|
from platypush.config import Config
|
|
from platypush.context import get_bus, get_plugin
|
|
from platypush.plugins.media import PlayerState, MediaPlugin
|
|
from platypush.message.event.torrent import TorrentDownloadStartEvent, \
|
|
TorrentDownloadCompletedEvent, TorrentDownloadedMetadataEvent
|
|
|
|
from platypush.plugins import action
|
|
from platypush.utils import find_bins_in_path, find_files_by_ext, \
|
|
is_process_alive, get_ip_or_hostname
|
|
|
|
|
|
class TorrentState(enum.IntEnum):
|
|
IDLE = 1
|
|
DOWNLOADING_METADATA = 2
|
|
DOWNLOADING = 3
|
|
DOWNLOADED = 4
|
|
|
|
|
|
class MediaWebtorrentPlugin(MediaPlugin):
|
|
"""
|
|
Plugin to download and stream videos using webtorrent
|
|
|
|
Requires:
|
|
|
|
* **webtorrent** installed on your system (``npm install -g webtorrent``)
|
|
* **webtorrent-cli** installed on your system (``npm install -g webtorrent-cli``)
|
|
* A media plugin configured for streaming (e.g. media.mplayer, media.vlc, media.mpv or media.omxplayer)
|
|
"""
|
|
|
|
_supported_media_plugins = {'media.mplayer', 'media.omxplayer', 'media.mpv',
|
|
'media.vlc', 'media.webtorrent'}
|
|
|
|
# Download at least 15 MBs before starting streaming
|
|
_download_size_before_streaming = 15 * 2**20
|
|
|
|
_web_stream_ready_timeout = 120
|
|
|
|
def __init__(self, webtorrent_bin=None, webtorrent_port=None, *args,
|
|
**kwargs):
|
|
"""
|
|
media.webtorrent will use the default media player plugin you have
|
|
configured (e.g. mplayer, omxplayer, mpv) to stream the torrent.
|
|
|
|
:param webtorrent_bin: Path to your webtorrent executable. If not set,
|
|
then Platypush will search for the right executable in your PATH
|
|
:type webtorrent_bin: str
|
|
|
|
:param webtorrent_port: Port where the webtorrent will be running
|
|
streaming server will be running (default: 8000)
|
|
:type webtorrent_port: int
|
|
"""
|
|
|
|
super().__init__(*args, **kwargs)
|
|
|
|
self.webtorrent_port = webtorrent_port
|
|
self._webtorrent_process = None
|
|
self._init_webtorrent_bin(webtorrent_bin=webtorrent_bin)
|
|
self._init_media_player()
|
|
self._download_started_event = threading.Event()
|
|
self._torrent_stream_urls = {}
|
|
|
|
def _init_webtorrent_bin(self, webtorrent_bin=None):
|
|
if not webtorrent_bin:
|
|
bin_name = 'webtorrent.exe' if os.name == 'nt' else 'webtorrent'
|
|
bins = find_bins_in_path(bin_name)
|
|
|
|
if not bins:
|
|
raise RuntimeError('Webtorrent executable not specified and ' +
|
|
'not found in your PATH. Make sure that ' +
|
|
'webtorrent is either installed or ' +
|
|
'configured and that both webtorrent and ' +
|
|
'webtorrent-cli are installed')
|
|
|
|
self.webtorrent_bin = bins[0]
|
|
else:
|
|
webtorrent_bin = os.path.expanduser(webtorrent_bin)
|
|
if not (os.path.isfile(webtorrent_bin)
|
|
and (os.name == 'nt' or os.access(webtorrent_bin, os.X_OK))):
|
|
raise RuntimeError('{} is does not exist or is not a valid ' +
|
|
'executable file'.format(webtorrent_bin))
|
|
|
|
self.webtorrent_bin = webtorrent_bin
|
|
|
|
def _init_media_player(self):
|
|
self._media_plugin = None
|
|
|
|
for plugin_name in self._supported_media_plugins:
|
|
try:
|
|
if Config.get(plugin_name):
|
|
self._media_plugin = get_plugin(plugin_name)
|
|
break
|
|
except:
|
|
pass
|
|
|
|
if not self._media_plugin:
|
|
raise RuntimeError(('No media player specified and no ' +
|
|
'compatible media plugin configured - ' +
|
|
'supported media plugins: {}').format(
|
|
self._supported_media_plugins))
|
|
|
|
def _read_process_line(self):
|
|
line = self._webtorrent_process.stdout.readline().decode().strip()
|
|
# Strip output of the colors
|
|
return re.sub('\x1b\[(([0-9]+m)|(.{1,2}))', '', line).strip()
|
|
|
|
def _process_monitor(self, resource, download_dir, download_only,
|
|
player_type, player_args):
|
|
def _thread():
|
|
if not self._webtorrent_process:
|
|
return
|
|
|
|
######
|
|
state = TorrentState.IDLE
|
|
bus = get_bus()
|
|
webtorrent_url = None
|
|
output_dir = None
|
|
media_file = None
|
|
|
|
poll = select.poll()
|
|
poll.register(self._webtorrent_process.stdout, select.POLLIN)
|
|
|
|
# First wait for the metadata to be ready and the streaming started
|
|
while True:
|
|
result = poll.poll(0)
|
|
if not result:
|
|
continue
|
|
|
|
if not self._is_process_alive():
|
|
break
|
|
|
|
line = self._read_process_line()
|
|
|
|
if 'fetching torrent metadata from' in line.lower() \
|
|
and state == TorrentState.IDLE:
|
|
# IDLE -> DOWNLOADING_METADATA
|
|
state = TorrentState.DOWNLOADING_METADATA
|
|
bus.post(TorrentDownloadedMetadataEvent(resource=resource))
|
|
elif 'downloading: ' in line.lower() \
|
|
and media_file is None:
|
|
# Find video files in torrent directory
|
|
output_dir = os.path.join(
|
|
download_dir, re.search(
|
|
'downloading: (.+?)$', line, flags=re.IGNORECASE
|
|
).group(1))
|
|
|
|
elif 'server running at: ' in line.lower() \
|
|
and webtorrent_url is None:
|
|
# Streaming started
|
|
webtorrent_url = re.search('server running at: (.+?)$',
|
|
line, flags=re.IGNORECASE).group(1)
|
|
webtorrent_url = webtorrent_url.replace(
|
|
'http://localhost', 'http://' + get_ip_or_hostname())
|
|
|
|
self._torrent_stream_urls[resource] = webtorrent_url
|
|
self._download_started_event.set()
|
|
self.logger.info('Torrent stream started on {}'.format(
|
|
webtorrent_url))
|
|
|
|
if output_dir and not media_file:
|
|
media_files = sorted(find_files_by_ext(
|
|
output_dir, *self._media_plugin.video_extensions))
|
|
|
|
if media_files:
|
|
# TODO support for queueing multiple media
|
|
media_file = os.path.join(output_dir, media_files[0])
|
|
else:
|
|
time.sleep(1) # Wait before the media file is created
|
|
|
|
if state.value <= TorrentState.DOWNLOADING_METADATA.value \
|
|
and media_file and webtorrent_url:
|
|
# DOWNLOADING_METADATA -> DOWNLOADING
|
|
state = TorrentState.DOWNLOADING
|
|
bus.post(TorrentDownloadStartEvent(
|
|
resource=resource, media_file=media_file,
|
|
stream_url=webtorrent_url))
|
|
break
|
|
|
|
if not output_dir:
|
|
raise RuntimeError('Could not download torrent')
|
|
if not download_only and (not media_file or not webtorrent_url):
|
|
if not media_file:
|
|
self.logger.warning(
|
|
'The torrent does not contain any video files')
|
|
else:
|
|
self.logger.warning('WebTorrent could not start streaming')
|
|
|
|
# Keep downloading but don't start the player
|
|
try: self._webtorrent_process.wait()
|
|
except: pass
|
|
return
|
|
|
|
player = None
|
|
|
|
if not download_only:
|
|
# Wait until we have enough chunks to start the player
|
|
while True:
|
|
result = poll.poll(0)
|
|
if not result:
|
|
continue
|
|
|
|
if not self._is_process_alive():
|
|
break
|
|
|
|
try:
|
|
if os.path.getsize(media_file) > \
|
|
self._download_size_before_streaming:
|
|
break
|
|
except FileNotFoundError:
|
|
continue
|
|
|
|
player = get_plugin('media.' + player_type) if player_type \
|
|
else self._media_plugin
|
|
|
|
media = media_file if player.is_local() else webtorrent_url
|
|
|
|
self.logger.info(
|
|
'Starting playback of {} to {} through {}'.format(
|
|
media_file, player.__class__.__name__,
|
|
webtorrent_url))
|
|
|
|
subfile = self.get_subtitles(media)
|
|
if subfile:
|
|
player_args['subtitles'] = subfile
|
|
|
|
player.play(media, **player_args)
|
|
self.logger.info('Waiting for player to terminate')
|
|
|
|
self._wait_for_player(player)
|
|
self.logger.info('Torrent player terminated')
|
|
bus.post(TorrentDownloadCompletedEvent(resource=resource,
|
|
output_dir=output_dir,
|
|
media_file=media_file))
|
|
|
|
try: self.quit()
|
|
except: pass
|
|
self.logger.info('WebTorrent process terminated')
|
|
|
|
return _thread
|
|
|
|
def _wait_for_player(self, player):
|
|
stop_evt = None
|
|
|
|
if player:
|
|
media_cls = player.__class__.__name__
|
|
|
|
if media_cls == 'MediaMplayerPlugin':
|
|
stop_evt = player._mplayer_stopped_event
|
|
elif media_cls == 'MediaMpvPlugin' or media_cls == 'MediaVlcPlugin':
|
|
stop_evt = threading.Event()
|
|
|
|
def stop_callback():
|
|
stop_evt.set()
|
|
player.on_stop(stop_callback)
|
|
elif media_cls == 'MediaOmxplayerPlugin':
|
|
stop_evt = threading.Event()
|
|
|
|
def stop_callback():
|
|
stop_evt.set()
|
|
player.add_handler('stop', stop_callback)
|
|
|
|
if stop_evt:
|
|
stop_evt.wait()
|
|
else:
|
|
# Fallback: wait for the webtorrent process to terminate
|
|
self._webtorrent_process.wait()
|
|
|
|
def _get_torrent_download_dir(self):
|
|
if self._media_plugin.download_dir:
|
|
return self._media_plugin.download_dir
|
|
else:
|
|
d = os.path.join(os.path.expanduser('~'), 'Downloads')
|
|
os.makedirs(d, exist_ok=True)
|
|
return d
|
|
|
|
def get_subtitles(self, filepath):
|
|
try:
|
|
plugin = get_plugin('media.subtitles')
|
|
if not plugin or not plugin.languages:
|
|
return
|
|
|
|
subs = plugin.get_subtitles(filepath).output
|
|
if not subs:
|
|
return
|
|
|
|
sub = plugin.download_subtitles(subs[0]['SubDownloadLink'],
|
|
filepath).output
|
|
|
|
if sub:
|
|
return sub['filename']
|
|
except Exception as e:
|
|
self.logger.warning('Could not get subtitles for {}: {}'.format(
|
|
filepath, str(e)))
|
|
|
|
@action
|
|
def play(self, resource, player=None, download_only=False, **player_args):
|
|
"""
|
|
Download and stream a torrent
|
|
|
|
:param resource: Play a resource, as a magnet link, torrent URL or
|
|
torrent file path
|
|
:type resource: str
|
|
|
|
:param player: If set, use this plugin type as a player for the
|
|
torrent. Supported types: 'mplayer', 'vlc', 'omxplayer', 'chromecast', 'mpv'.
|
|
If not set, then the default configured media plugin will be used.
|
|
:type player: str
|
|
|
|
:param player_args: Any arguments to pass to the player plugin's
|
|
play() method
|
|
:type player_args: dict
|
|
|
|
:param download_only: If false then it will start streaming the torrent on the local player once the
|
|
download starts, otherwise it will just download it (default: false)
|
|
:type download_only: bool
|
|
"""
|
|
|
|
if self._webtorrent_process:
|
|
try:
|
|
self.quit()
|
|
except Exception as e:
|
|
self.logger.debug('Failed to quit the previous instance: {}'.
|
|
format(str(e)))
|
|
|
|
download_dir = self._get_torrent_download_dir()
|
|
webtorrent_args = [self.webtorrent_bin, 'download', '-o', download_dir]
|
|
|
|
if self.webtorrent_port:
|
|
webtorrent_args += ['-p', self.webtorrent_port]
|
|
webtorrent_args += [resource]
|
|
|
|
self._download_started_event.clear()
|
|
self._webtorrent_process = subprocess.Popen(webtorrent_args,
|
|
stdout=subprocess.PIPE)
|
|
|
|
threading.Thread(target=self._process_monitor(
|
|
resource=resource, download_dir=download_dir,
|
|
player_type=player, player_args=player_args,
|
|
download_only=download_only)).start()
|
|
|
|
stream_url = None
|
|
player_ready_wait_start = time.time()
|
|
|
|
while not stream_url:
|
|
triggered = self._download_started_event.wait(
|
|
self._web_stream_ready_timeout)
|
|
|
|
if not triggered or time.time() - player_ready_wait_start >= \
|
|
self._web_stream_ready_timeout:
|
|
break
|
|
|
|
stream_url = self._torrent_stream_urls.get(resource)
|
|
|
|
if not stream_url:
|
|
return (None, ('The webtorrent process hasn\'t started ' +
|
|
'streaming after {} seconds').format(
|
|
self._web_stream_ready_timeout))
|
|
|
|
return {'resource': resource, 'url': stream_url}
|
|
|
|
@action
|
|
def download(self, resource, **kwargs):
|
|
return self.play(resource, download_only=True)
|
|
|
|
@action
|
|
def stop(self):
|
|
""" Stop the playback """
|
|
return self.quit()
|
|
|
|
@action
|
|
def quit(self):
|
|
""" Quit the player """
|
|
if self._is_process_alive():
|
|
self._webtorrent_process.terminate()
|
|
self._webtorrent_process.wait()
|
|
try: self._webtorrent_process.kill()
|
|
except: pass
|
|
|
|
self._webtorrent_process = None
|
|
|
|
@action
|
|
def load(self, resource, **kwargs):
|
|
"""
|
|
Load a torrent resource in the player.
|
|
"""
|
|
return self.play(resource)
|
|
|
|
def _is_process_alive(self):
|
|
return is_process_alive(self._webtorrent_process.pid) \
|
|
if self._webtorrent_process else False
|
|
|
|
@action
|
|
def status(self):
|
|
"""
|
|
Get the current player state.
|
|
|
|
:returns: A dictionary containing the current state.
|
|
|
|
Example::
|
|
|
|
output = {
|
|
"state": "play" # or "stop" or "pause"
|
|
}
|
|
"""
|
|
|
|
return {'state': self._media_plugin.status().get('state', PlayerState.STOP.value)}
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|