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.error import InvalidStreamURLError 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 try: if not URL.parse(uri).has_stream: raise InvalidStreamURLError(uri) except ValueError: raise InvalidStreamURLError(uri) 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: 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) elif claim.stream.source.sd_hash: source_manager = self.source_managers['stream'] existing = source_manager.get_filtered(sd_hash=claim.stream.source.sd_hash) else: raise ResolveError(f"There is nothing to download at {uri} - Source is unknown or unset") # 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)) return stream except asyncio.TimeoutError: error = DownloadDataTimeoutError(stream.sd_hash) raise error except (Exception, asyncio.CancelledError) as err: # forgive data timeout, don't delete stream expected = (DownloadSDTimeoutError, DownloadDataTimeoutError, InsufficientFundsError, KeyFeeAboveMaxAllowedError, ResolveError, InvalidStreamURLError) 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)