forked from LBRYCommunity/lbry-sdk
300 lines
15 KiB
Python
300 lines
15 KiB
Python
import asyncio
|
|
import logging
|
|
import typing
|
|
from typing import Optional
|
|
from aiohttp.web import Request
|
|
from lbry.error import ResolveError, DownloadSDTimeoutError, InsufficientFundsError
|
|
from lbry.error import ResolveTimeoutError, DownloadDataTimeoutError, KeyFeeAboveMaxAllowedError
|
|
from lbry.stream.managed_stream import ManagedStream
|
|
from lbry.torrent.torrent_manager import TorrentSource
|
|
from lbry.utils import cache_concurrent
|
|
from lbry.schema.url import URL
|
|
from lbry.wallet.dewies import dewies_to_lbc
|
|
from lbry.file.source_manager import SourceManager
|
|
from lbry.file.source import ManagedDownloadSource
|
|
if typing.TYPE_CHECKING:
|
|
from lbry.conf import Config
|
|
from lbry.extras.daemon.analytics import AnalyticsManager
|
|
from lbry.extras.daemon.storage import SQLiteStorage
|
|
from lbry.wallet import WalletManager, Output
|
|
from lbry.extras.daemon.exchange_rate_manager import ExchangeRateManager
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class FileManager:
|
|
def __init__(self, loop: asyncio.AbstractEventLoop, config: 'Config', wallet_manager: 'WalletManager',
|
|
storage: 'SQLiteStorage', analytics_manager: Optional['AnalyticsManager'] = None):
|
|
self.loop = loop
|
|
self.config = config
|
|
self.wallet_manager = wallet_manager
|
|
self.storage = storage
|
|
self.analytics_manager = analytics_manager
|
|
self.source_managers: typing.Dict[str, SourceManager] = {}
|
|
self.started = asyncio.Event()
|
|
|
|
@property
|
|
def streams(self):
|
|
return self.source_managers['stream']._sources
|
|
|
|
async def create_stream(self, file_path: str, key: Optional[bytes] = None, **kwargs) -> ManagedDownloadSource:
|
|
if 'stream' in self.source_managers:
|
|
return await self.source_managers['stream'].create(file_path, key, **kwargs)
|
|
raise NotImplementedError
|
|
|
|
async def start(self):
|
|
await asyncio.gather(*(source_manager.start() for source_manager in self.source_managers.values()))
|
|
for manager in self.source_managers.values():
|
|
await manager.started.wait()
|
|
self.started.set()
|
|
|
|
def stop(self):
|
|
for manager in self.source_managers.values():
|
|
# fixme: pop or not?
|
|
manager.stop()
|
|
self.started.clear()
|
|
|
|
@cache_concurrent
|
|
async def download_from_uri(self, uri, exchange_rate_manager: 'ExchangeRateManager',
|
|
timeout: Optional[float] = None, file_name: Optional[str] = None,
|
|
download_directory: Optional[str] = None,
|
|
save_file: Optional[bool] = None, resolve_timeout: float = 3.0,
|
|
wallet: Optional['Wallet'] = None) -> ManagedDownloadSource:
|
|
|
|
wallet = wallet or self.wallet_manager.default_wallet
|
|
timeout = timeout or self.config.download_timeout
|
|
start_time = self.loop.time()
|
|
resolved_time = None
|
|
stream = None
|
|
claim = None
|
|
error = None
|
|
outpoint = None
|
|
if save_file is None:
|
|
save_file = self.config.save_files
|
|
if file_name and not save_file:
|
|
save_file = True
|
|
if save_file:
|
|
download_directory = download_directory or self.config.download_dir
|
|
else:
|
|
download_directory = None
|
|
|
|
payment = None
|
|
try:
|
|
# resolve the claim
|
|
if not URL.parse(uri).has_stream:
|
|
raise ResolveError("cannot download a channel claim, specify a /path")
|
|
try:
|
|
resolved_result = await asyncio.wait_for(
|
|
self.wallet_manager.ledger.resolve(
|
|
wallet.accounts, [uri],
|
|
include_purchase_receipt=True,
|
|
include_is_my_output=True
|
|
), resolve_timeout
|
|
)
|
|
except asyncio.TimeoutError:
|
|
raise ResolveTimeoutError(uri)
|
|
except Exception as err:
|
|
if isinstance(err, asyncio.CancelledError):
|
|
raise
|
|
log.exception("Unexpected error resolving stream:")
|
|
raise ResolveError(f"Unexpected error resolving stream: {str(err)}")
|
|
if 'error' in resolved_result:
|
|
raise ResolveError(f"Unexpected error resolving uri for download: {resolved_result['error']}")
|
|
if not resolved_result or uri not in resolved_result:
|
|
raise ResolveError(f"Failed to resolve stream at '{uri}'")
|
|
txo = resolved_result[uri]
|
|
if isinstance(txo, dict):
|
|
raise ResolveError(f"Failed to resolve stream at '{uri}': {txo}")
|
|
claim = txo.claim
|
|
outpoint = f"{txo.tx_ref.id}:{txo.position}"
|
|
resolved_time = self.loop.time() - start_time
|
|
await self.storage.save_claim_from_output(self.wallet_manager.ledger, txo)
|
|
|
|
####################
|
|
# update or replace
|
|
####################
|
|
|
|
if claim.stream.source.bt_infohash:
|
|
source_manager = self.source_managers['torrent']
|
|
existing = source_manager.get_filtered(bt_infohash=claim.stream.source.bt_infohash)
|
|
else:
|
|
source_manager = self.source_managers['stream']
|
|
existing = source_manager.get_filtered(sd_hash=claim.stream.source.sd_hash)
|
|
|
|
# resume or update an existing stream, if the stream changed: download it and delete the old one after
|
|
to_replace, updated_stream = None, None
|
|
if existing and existing[0].claim_id != txo.claim_id:
|
|
raise ResolveError(f"stream for {existing[0].claim_id} collides with existing download {txo.claim_id}")
|
|
if existing:
|
|
log.info("claim contains a metadata only update to a stream we have")
|
|
if claim.stream.source.bt_infohash:
|
|
await self.storage.save_torrent_content_claim(
|
|
existing[0].identifier, outpoint, existing[0].torrent_length, existing[0].torrent_name
|
|
)
|
|
claim_info = await self.storage.get_content_claim_for_torrent(existing[0].identifier)
|
|
existing[0].set_claim(claim_info, claim)
|
|
else:
|
|
await self.storage.save_content_claim(
|
|
existing[0].stream_hash, outpoint
|
|
)
|
|
await source_manager._update_content_claim(existing[0])
|
|
updated_stream = existing[0]
|
|
else:
|
|
existing_for_claim_id = self.get_filtered(claim_id=txo.claim_id)
|
|
if existing_for_claim_id:
|
|
log.info("claim contains an update to a stream we have, downloading it")
|
|
if save_file and existing_for_claim_id[0].output_file_exists:
|
|
save_file = False
|
|
if not claim.stream.source.bt_infohash:
|
|
existing_for_claim_id[0].downloader.node = source_manager.node
|
|
await existing_for_claim_id[0].start(timeout=timeout, save_now=save_file)
|
|
if not existing_for_claim_id[0].output_file_exists and (
|
|
save_file or file_name or download_directory):
|
|
await existing_for_claim_id[0].save_file(
|
|
file_name=file_name, download_directory=download_directory
|
|
)
|
|
to_replace = existing_for_claim_id[0]
|
|
|
|
# resume or update an existing stream, if the stream changed: download it and delete the old one after
|
|
if updated_stream:
|
|
log.info("already have stream for %s", uri)
|
|
if save_file and updated_stream.output_file_exists:
|
|
save_file = False
|
|
if not claim.stream.source.bt_infohash:
|
|
updated_stream.downloader.node = source_manager.node
|
|
await updated_stream.start(timeout=timeout, save_now=save_file)
|
|
if not updated_stream.output_file_exists and (save_file or file_name or download_directory):
|
|
await updated_stream.save_file(
|
|
file_name=file_name, download_directory=download_directory
|
|
)
|
|
return updated_stream
|
|
|
|
####################
|
|
# pay fee
|
|
####################
|
|
|
|
needs_purchasing = (
|
|
not to_replace and
|
|
not txo.is_my_output and
|
|
txo.has_price and
|
|
not txo.purchase_receipt
|
|
)
|
|
|
|
if needs_purchasing:
|
|
payment = await self.wallet_manager.create_purchase_transaction(
|
|
wallet.accounts, txo, exchange_rate_manager
|
|
)
|
|
|
|
####################
|
|
# make downloader and wait for start
|
|
####################
|
|
|
|
if not claim.stream.source.bt_infohash:
|
|
# fixme: this shouldnt be here
|
|
stream = ManagedStream(
|
|
self.loop, self.config, source_manager.blob_manager, claim.stream.source.sd_hash,
|
|
download_directory, file_name, ManagedStream.STATUS_RUNNING, content_fee=payment,
|
|
analytics_manager=self.analytics_manager
|
|
)
|
|
stream.downloader.node = source_manager.node
|
|
else:
|
|
stream = TorrentSource(
|
|
self.loop, self.config, self.storage, identifier=claim.stream.source.bt_infohash,
|
|
file_name=file_name, download_directory=download_directory or self.config.download_dir,
|
|
status=ManagedStream.STATUS_RUNNING,
|
|
analytics_manager=self.analytics_manager,
|
|
torrent_session=source_manager.torrent_session
|
|
)
|
|
log.info("starting download for %s", uri)
|
|
|
|
before_download = self.loop.time()
|
|
await stream.start(timeout, save_file)
|
|
|
|
####################
|
|
# success case: delete to_replace if applicable, broadcast fee payment
|
|
####################
|
|
|
|
if to_replace: # delete old stream now that the replacement has started downloading
|
|
await source_manager.delete(to_replace)
|
|
|
|
if payment is not None:
|
|
await self.wallet_manager.broadcast_or_release(payment)
|
|
payment = None # to avoid releasing in `finally` later
|
|
log.info("paid fee of %s for %s", dewies_to_lbc(stream.content_fee.outputs[0].amount), uri)
|
|
await self.storage.save_content_fee(stream.stream_hash, stream.content_fee)
|
|
|
|
source_manager.add(stream)
|
|
|
|
if not claim.stream.source.bt_infohash:
|
|
await self.storage.save_content_claim(stream.stream_hash, outpoint)
|
|
else:
|
|
await self.storage.save_torrent_content_claim(
|
|
stream.identifier, outpoint, stream.torrent_length, stream.torrent_name
|
|
)
|
|
claim_info = await self.storage.get_content_claim_for_torrent(stream.identifier)
|
|
stream.set_claim(claim_info, claim)
|
|
if save_file:
|
|
await asyncio.wait_for(stream.save_file(), timeout - (self.loop.time() - before_download),
|
|
loop=self.loop)
|
|
return stream
|
|
except asyncio.TimeoutError:
|
|
error = DownloadDataTimeoutError(stream.sd_hash)
|
|
raise error
|
|
except Exception as err: # forgive data timeout, don't delete stream
|
|
expected = (DownloadSDTimeoutError, DownloadDataTimeoutError, InsufficientFundsError,
|
|
KeyFeeAboveMaxAllowedError)
|
|
if isinstance(err, expected):
|
|
log.warning("Failed to download %s: %s", uri, str(err))
|
|
elif isinstance(err, asyncio.CancelledError):
|
|
pass
|
|
else:
|
|
log.exception("Unexpected error downloading stream:")
|
|
error = err
|
|
raise
|
|
finally:
|
|
if payment is not None:
|
|
# payment is set to None after broadcasting, if we're here an exception probably happened
|
|
await self.wallet_manager.ledger.release_tx(payment)
|
|
if self.analytics_manager and claim and claim.stream.source.bt_infohash:
|
|
# TODO: analytics for torrents
|
|
pass
|
|
elif self.analytics_manager and (error or (stream and (stream.downloader.time_to_descriptor or
|
|
stream.downloader.time_to_first_bytes))):
|
|
server = self.wallet_manager.ledger.network.client.server
|
|
self.loop.create_task(
|
|
self.analytics_manager.send_time_to_first_bytes(
|
|
resolved_time, self.loop.time() - start_time, None if not stream else stream.download_id,
|
|
uri, outpoint,
|
|
None if not stream else len(stream.downloader.blob_downloader.active_connections),
|
|
None if not stream else len(stream.downloader.blob_downloader.scores),
|
|
None if not stream else len(stream.downloader.blob_downloader.connection_failures),
|
|
False if not stream else stream.downloader.added_fixed_peers,
|
|
self.config.fixed_peer_delay if not stream else stream.downloader.fixed_peers_delay,
|
|
None if not stream else stream.sd_hash,
|
|
None if not stream else stream.downloader.time_to_descriptor,
|
|
None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].blob_hash,
|
|
None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].length,
|
|
None if not stream else stream.downloader.time_to_first_bytes,
|
|
None if not error else error.__class__.__name__,
|
|
None if not error else str(error),
|
|
None if not server else f"{server[0]}:{server[1]}"
|
|
)
|
|
)
|
|
|
|
async def stream_partial_content(self, request: Request, sd_hash: str):
|
|
return await self.source_managers['stream'].stream_partial_content(request, sd_hash)
|
|
|
|
def get_filtered(self, *args, **kwargs) -> typing.List[ManagedDownloadSource]:
|
|
"""
|
|
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
|
|
"""
|
|
return sum((manager.get_filtered(*args, **kwargs) for manager in self.source_managers.values()), [])
|
|
|
|
async def delete(self, source: ManagedDownloadSource, delete_file=False):
|
|
for manager in self.source_managers.values():
|
|
await manager.delete(source, delete_file)
|