282 lines
13 KiB
Python
282 lines
13 KiB
Python
import os
|
|
import asyncio
|
|
import typing
|
|
import binascii
|
|
import logging
|
|
import random
|
|
from lbrynet.stream.downloader import StreamDownloader
|
|
from lbrynet.stream.managed_stream import ManagedStream
|
|
from lbrynet.schema.claim import ClaimDict
|
|
from lbrynet.extras.daemon.storage import StoredStreamClaim, lbc_to_dewies
|
|
if typing.TYPE_CHECKING:
|
|
from lbrynet.blob.blob_manager import BlobFileManager
|
|
from lbrynet.dht.peer import KademliaPeer
|
|
from lbrynet.dht.node import Node
|
|
from lbrynet.extras.daemon.storage import SQLiteStorage
|
|
from lbrynet.extras.wallet import LbryWalletManager
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
filter_fields = [
|
|
'status',
|
|
'file_name',
|
|
'sd_hash',
|
|
'stream_hash',
|
|
'claim_name',
|
|
'claim_height',
|
|
'claim_id',
|
|
'outpoint',
|
|
'txid',
|
|
'nout',
|
|
'channel_claim_id',
|
|
'channel_name',
|
|
'full_status'
|
|
]
|
|
|
|
comparison_operators = {
|
|
'eq': lambda a, b: a == b,
|
|
'ne': lambda a, b: a != b,
|
|
'g': lambda a, b: a > b,
|
|
'l': lambda a, b: a < b,
|
|
'ge': lambda a, b: a >= b,
|
|
'le': lambda a, b: a <= b,
|
|
}
|
|
|
|
|
|
class StreamManager:
|
|
def __init__(self, loop: asyncio.BaseEventLoop, blob_manager: 'BlobFileManager', wallet: 'LbryWalletManager',
|
|
storage: 'SQLiteStorage', node: typing.Optional['Node'], peer_timeout: float,
|
|
peer_connect_timeout: float, fixed_peers: typing.Optional[typing.List['KademliaPeer']] = None,
|
|
reflector_servers: typing.Optional[typing.List[typing.Tuple[str, int]]] = None):
|
|
self.loop = loop
|
|
self.blob_manager = blob_manager
|
|
self.wallet = wallet
|
|
self.storage = storage
|
|
self.node = node
|
|
self.peer_timeout = peer_timeout
|
|
self.peer_connect_timeout = peer_connect_timeout
|
|
self.streams: typing.Set[ManagedStream] = set()
|
|
self.starting_streams: typing.Dict[str, asyncio.Future] = {}
|
|
self.resume_downloading_task: asyncio.Task = None
|
|
self.update_stream_finished_futs: typing.List[asyncio.Future] = []
|
|
self.fixed_peers = fixed_peers
|
|
self.reflector_servers = reflector_servers
|
|
|
|
async def load_streams_from_database(self):
|
|
infos = await self.storage.get_all_lbry_files()
|
|
for file_info in infos:
|
|
sd_blob = self.blob_manager.get_blob(file_info['sd_hash'])
|
|
if sd_blob.get_is_verified():
|
|
descriptor = await self.blob_manager.get_stream_descriptor(sd_blob.blob_hash)
|
|
downloader = StreamDownloader(
|
|
self.loop, self.blob_manager, descriptor.sd_hash, self.peer_timeout,
|
|
self.peer_connect_timeout, binascii.unhexlify(file_info['download_directory']).decode(),
|
|
binascii.unhexlify(file_info['file_name']).decode(), self.fixed_peers
|
|
)
|
|
stream = ManagedStream(
|
|
self.loop, self.blob_manager, descriptor,
|
|
binascii.unhexlify(file_info['download_directory']).decode(),
|
|
binascii.unhexlify(file_info['file_name']).decode(),
|
|
downloader, file_info['status'], file_info['claim']
|
|
)
|
|
self.streams.add(stream)
|
|
|
|
async def resume(self):
|
|
if not self.node:
|
|
log.warning("no DHT node given, cannot resume downloads")
|
|
return
|
|
await self.node.joined.wait()
|
|
resumed = 0
|
|
for stream in self.streams:
|
|
if stream.status == ManagedStream.STATUS_RUNNING:
|
|
resumed += 1
|
|
stream.downloader.download(self.node)
|
|
self.wait_for_stream_finished(stream)
|
|
if resumed:
|
|
log.info("resuming %i downloads", resumed)
|
|
|
|
async def reflect_streams(self):
|
|
streams = list(self.streams)
|
|
batch = []
|
|
while streams:
|
|
stream = streams.pop()
|
|
if not stream.fully_reflected.is_set():
|
|
host, port = random.choice(self.reflector_servers)
|
|
batch.append(stream.upload_to_reflector(host, port))
|
|
if len(batch) >= 10:
|
|
await asyncio.gather(*batch)
|
|
batch = []
|
|
if batch:
|
|
await asyncio.gather(*batch)
|
|
|
|
async def start(self):
|
|
await self.load_streams_from_database()
|
|
self.resume_downloading_task = self.loop.create_task(self.resume())
|
|
|
|
async def stop(self):
|
|
if self.resume_downloading_task and not self.resume_downloading_task.done():
|
|
self.resume_downloading_task.cancel()
|
|
while self.streams:
|
|
stream = self.streams.pop()
|
|
await stream.stop_download()
|
|
while self.update_stream_finished_futs:
|
|
self.update_stream_finished_futs.pop().cancel()
|
|
|
|
async def create_stream(self, file_path: str, key: typing.Optional[bytes] = None,
|
|
iv_generator: typing.Optional[typing.Generator[bytes, None, None]] = None) -> ManagedStream:
|
|
stream = await ManagedStream.create(self.loop, self.blob_manager, file_path, key, iv_generator)
|
|
self.streams.add(stream)
|
|
if self.reflector_servers:
|
|
host, port = random.choice(self.reflector_servers)
|
|
self.loop.create_task(stream.upload_to_reflector(host, port))
|
|
return stream
|
|
|
|
async def delete_stream(self, stream: ManagedStream, delete_file: typing.Optional[bool] = False):
|
|
await stream.stop_download()
|
|
self.streams.remove(stream)
|
|
await self.storage.delete_stream(stream.descriptor)
|
|
|
|
blob_hashes = [stream.sd_hash]
|
|
for blob_info in stream.descriptor.blobs[:-1]:
|
|
blob_hashes.append(blob_info.blob_hash)
|
|
for blob_hash in blob_hashes:
|
|
blob = self.blob_manager.get_blob(blob_hash)
|
|
if blob.get_is_verified():
|
|
await blob.delete()
|
|
|
|
if delete_file:
|
|
path = os.path.join(stream.download_directory, stream.file_name)
|
|
if os.path.isfile(path):
|
|
os.remove(path)
|
|
|
|
def wait_for_stream_finished(self, stream: ManagedStream):
|
|
async def _wait_for_stream_finished():
|
|
if stream.downloader and stream.running:
|
|
try:
|
|
await stream.downloader.stream_finished_event.wait()
|
|
stream.update_status(ManagedStream.STATUS_FINISHED)
|
|
except asyncio.CancelledError:
|
|
pass
|
|
task = self.loop.create_task(_wait_for_stream_finished())
|
|
self.update_stream_finished_futs.append(task)
|
|
task.add_done_callback(
|
|
lambda _: None if task not in self.update_stream_finished_futs else
|
|
self.update_stream_finished_futs.remove(task)
|
|
)
|
|
|
|
async def _download_stream_from_claim(self, node: 'Node', download_directory: str, claim_info: typing.Dict,
|
|
file_name: typing.Optional[str] = None, data_rate: typing.Optional[int] = 0,
|
|
sd_blob_timeout: typing.Optional[float] = 60
|
|
) -> typing.Optional[ManagedStream]:
|
|
|
|
claim = ClaimDict.load_dict(claim_info['value'])
|
|
downloader = StreamDownloader(self.loop, self.blob_manager, claim.source_hash.decode(), self.peer_timeout,
|
|
self.peer_connect_timeout, download_directory, file_name, self.fixed_peers)
|
|
try:
|
|
downloader.download(node)
|
|
await asyncio.wait_for(downloader.got_descriptor.wait(), sd_blob_timeout)
|
|
log.info("got descriptor %s for %s", claim.source_hash.decode(), claim_info['name'])
|
|
except (asyncio.TimeoutError, asyncio.CancelledError):
|
|
log.info("stream timeout")
|
|
await downloader.stop()
|
|
log.info("stopped stream")
|
|
return
|
|
if not await self.blob_manager.storage.stream_exists(downloader.sd_hash):
|
|
await self.blob_manager.storage.store_stream(downloader.sd_blob, downloader.descriptor)
|
|
if not await self.blob_manager.storage.file_exists(downloader.sd_hash):
|
|
await self.blob_manager.storage.save_downloaded_file(
|
|
downloader.descriptor.stream_hash, os.path.basename(downloader.output_path), download_directory,
|
|
data_rate
|
|
)
|
|
await self.blob_manager.storage.save_content_claim(
|
|
downloader.descriptor.stream_hash, f"{claim_info['txid']}:{claim_info['nout']}"
|
|
)
|
|
|
|
stored_claim = StoredStreamClaim(
|
|
downloader.descriptor.stream_hash, f"{claim_info['txid']}:{claim_info['nout']}", claim_info['claim_id'],
|
|
claim_info['name'], claim_info['amount'], claim_info['height'], claim_info['hex'],
|
|
claim.certificate_id, claim_info['address'], claim_info['claim_sequence'],
|
|
claim_info.get('channel_name')
|
|
)
|
|
stream = ManagedStream(self.loop, self.blob_manager, downloader.descriptor, download_directory,
|
|
os.path.basename(downloader.output_path), downloader, ManagedStream.STATUS_RUNNING,
|
|
stored_claim)
|
|
self.streams.add(stream)
|
|
try:
|
|
await stream.downloader.wrote_bytes_event.wait()
|
|
self.wait_for_stream_finished(stream)
|
|
return stream
|
|
except asyncio.CancelledError:
|
|
await downloader.stop()
|
|
|
|
async def download_stream_from_claim(self, node: 'Node', download_directory: str, claim_info: typing.Dict,
|
|
file_name: typing.Optional[str] = None,
|
|
sd_blob_timeout: typing.Optional[float] = 60,
|
|
fee_amount: typing.Optional[float] = 0.0,
|
|
fee_address: typing.Optional[str] = None) -> typing.Optional[ManagedStream]:
|
|
log.info("get lbry://%s#%s", claim_info['name'], claim_info['claim_id'])
|
|
claim = ClaimDict.load_dict(claim_info['value'])
|
|
if fee_address and fee_amount:
|
|
if fee_amount > await self.wallet.default_account.get_balance():
|
|
raise Exception("not enough funds")
|
|
sd_hash = claim.source_hash.decode()
|
|
if sd_hash in self.starting_streams:
|
|
return await self.starting_streams[sd_hash]
|
|
already_started = tuple(filter(lambda s: s.descriptor.sd_hash == sd_hash, self.streams))
|
|
if already_started:
|
|
return already_started[0]
|
|
|
|
self.starting_streams[sd_hash] = asyncio.Future(loop=self.loop)
|
|
stream_task = self.loop.create_task(
|
|
self._download_stream_from_claim(node, download_directory, claim_info, file_name, 0, sd_blob_timeout)
|
|
)
|
|
try:
|
|
await asyncio.wait_for(stream_task, sd_blob_timeout)
|
|
stream = await stream_task
|
|
self.starting_streams[sd_hash].set_result(stream)
|
|
if fee_address and fee_amount:
|
|
await self.wallet.send_amount_to_address(lbc_to_dewies(str(fee_amount)), fee_address.encode('latin1'))
|
|
return stream
|
|
except (asyncio.TimeoutError, asyncio.CancelledError):
|
|
return
|
|
finally:
|
|
if sd_hash in self.starting_streams:
|
|
del self.starting_streams[sd_hash]
|
|
log.info("returned from get lbry://%s#%s", claim_info['name'], claim_info['claim_id'])
|
|
|
|
def get_filtered_streams(self, sort_by: typing.Optional[str] = None, reverse: typing.Optional[bool] = False,
|
|
comparison: typing.Optional[str] = None,
|
|
**search_by) -> typing.List[ManagedStream]:
|
|
"""
|
|
Get a list of filtered and sorted ManagedStream objects
|
|
|
|
:param sort_by: field to sort by
|
|
:param reverse: reverse sorting
|
|
:param comparison: comparison operator used for filtering
|
|
:param search_by: fields and values to filter by
|
|
"""
|
|
if sort_by and sort_by not in filter_fields:
|
|
raise ValueError(f"'{sort_by}' is not a valid field to sort by")
|
|
if comparison and comparison not in comparison_operators:
|
|
raise ValueError(f"'{comparison}' is not a valid comparison")
|
|
for search in search_by.keys():
|
|
if search not in filter_fields:
|
|
raise ValueError(f"'{search}' is not a valid search operation")
|
|
if search_by:
|
|
comparison = comparison or 'eq'
|
|
streams = []
|
|
for stream in self.streams:
|
|
for search, val in search_by.items():
|
|
if search == 'full_status':
|
|
continue
|
|
if comparison_operators[comparison](getattr(stream, search), val):
|
|
streams.append(stream)
|
|
break
|
|
else:
|
|
streams = list(self.streams)
|
|
if sort_by:
|
|
streams.sort(key=lambda s: getattr(s, sort_by))
|
|
if reverse:
|
|
streams.reverse()
|
|
return streams
|