forked from LBRYCommunity/lbry-sdk
435 lines
22 KiB
Python
435 lines
22 KiB
Python
import time
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import asyncio
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import binascii
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import logging
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import typing
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from typing import Optional
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from aiohttp.web import Request
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from lbry.error import ResolveError, InvalidStreamDescriptorError, DownloadSDTimeoutError, InsufficientFundsError
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from lbry.error import ResolveTimeoutError, DownloadDataTimeoutError, KeyFeeAboveMaxAllowedError
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from lbry.utils import cache_concurrent
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from lbry.schema.claim import Claim
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from lbry.schema.url import URL
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from lbry.wallet.dewies import dewies_to_lbc
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from lbry.wallet.transaction import Output
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from lbry.file.source_manager import SourceManager
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from lbry.file.source import ManagedDownloadSource
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if typing.TYPE_CHECKING:
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from lbry.conf import Config
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from lbry.extras.daemon.analytics import AnalyticsManager
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from lbry.extras.daemon.storage import SQLiteStorage
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from lbry.wallet import LbryWalletManager
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from lbry.extras.daemon.exchange_rate_manager import ExchangeRateManager
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log = logging.getLogger(__name__)
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def path_or_none(p) -> Optional[str]:
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if not p:
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return
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return binascii.unhexlify(p).decode()
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class FileManager:
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def __init__(self, loop: asyncio.AbstractEventLoop, config: 'Config', wallet_manager: 'LbryWalletManager',
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storage: 'SQLiteStorage', analytics_manager: Optional['AnalyticsManager'] = None):
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self.loop = loop
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self.config = config
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self.wallet_manager = wallet_manager
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self.storage = storage
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self.analytics_manager = analytics_manager
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self.source_managers: typing.Dict[str, SourceManager] = {}
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async def start(self):
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await asyncio.gather(*(source_manager.start() for source_manager in self.source_managers.values()))
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def stop(self):
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while self.source_managers:
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_, source_manager = self.source_managers.popitem()
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source_manager.stop()
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@cache_concurrent
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async def download_from_uri(self, uri, exchange_rate_manager: 'ExchangeRateManager',
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timeout: Optional[float] = None, file_name: Optional[str] = None,
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download_directory: Optional[str] = None,
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save_file: Optional[bool] = None, resolve_timeout: float = 3.0,
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wallet: Optional['Wallet'] = None) -> ManagedDownloadSource:
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wallet = wallet or self.wallet_manager.default_wallet
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timeout = timeout or self.config.download_timeout
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start_time = self.loop.time()
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resolved_time = None
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stream = None
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error = None
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outpoint = None
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if save_file is None:
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save_file = self.config.save_files
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if file_name and not save_file:
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save_file = True
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if save_file:
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download_directory = download_directory or self.config.download_dir
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else:
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download_directory = None
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payment = None
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try:
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# resolve the claim
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if not URL.parse(uri).has_stream:
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raise ResolveError("cannot download a channel claim, specify a /path")
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try:
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resolved_result = await asyncio.wait_for(
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self.wallet_manager.ledger.resolve(wallet.accounts, [uri]),
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resolve_timeout
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)
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except asyncio.TimeoutError:
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raise ResolveTimeoutError(uri)
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except Exception as err:
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if isinstance(err, asyncio.CancelledError):
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raise
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log.exception("Unexpected error resolving stream:")
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raise ResolveError(f"Unexpected error resolving stream: {str(err)}")
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if not resolved_result:
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raise ResolveError(f"Failed to resolve stream at '{uri}'")
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if 'error' in resolved_result:
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raise ResolveError(f"Unexpected error resolving uri for download: {resolved_result['error']}")
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await self.storage.save_claims(
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resolved_result, self.wallet_manager.ledger
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)
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txo = resolved_result[uri]
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claim = txo.claim
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outpoint = f"{txo.tx_ref.id}:{txo.position}"
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resolved_time = self.loop.time() - start_time
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####################
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# update or replace
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####################
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if claim.stream.source.bt_infohash:
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source_manager = self.source_managers['torrent']
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else:
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source_manager = self.source_managers['stream']
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# resume or update an existing stream, if the stream changed: download it and delete the old one after
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existing = self.get_filtered(sd_hash=claim.stream.source.sd_hash)
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if existing and existing[0].claim_id != txo.claim_id:
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raise ResolveError(f"stream for {existing[0].claim_id} collides with existing download {txo.claim_id}")
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if existing:
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log.info("claim contains a metadata only update to a stream we have")
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await self.storage.save_content_claim(
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existing[0].stream_hash, outpoint
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)
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await source_manager._update_content_claim(existing[0])
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return existing[0]
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else:
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existing_for_claim_id = self.get_filtered(claim_id=txo.claim_id)
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if existing_for_claim_id:
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log.info("claim contains an update to a stream we have, downloading it")
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if save_file and existing_for_claim_id[0].output_file_exists:
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save_file = False
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await existing_for_claim_id[0].start(node=self.node, timeout=timeout, save_now=save_file)
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if not existing_for_claim_id[0].output_file_exists and (save_file or file_name or download_directory):
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await existing_for_claim_id[0].save_file(
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file_name=file_name, download_directory=download_directory, node=self.node
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)
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return existing_for_claim_id[0]
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if updated_stream:
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####################
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# pay fee
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####################
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if not to_replace and txo.has_price and not txo.purchase_receipt:
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payment = await manager.create_purchase_transaction(
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wallet.accounts, txo, exchange_rate_manager
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)
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####################
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# make downloader and wait for start
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####################
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stream = ManagedStream(
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self.loop, self.config, self.blob_manager, claim.stream.source.sd_hash, download_directory,
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file_name, ManagedStream.STATUS_RUNNING, content_fee=payment,
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analytics_manager=self.analytics_manager
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)
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log.info("starting download for %s", uri)
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before_download = self.loop.time()
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await stream.start(self.node, timeout)
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stream.set_claim(resolved, claim)
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####################
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# success case: delete to_replace if applicable, broadcast fee payment
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####################
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if to_replace: # delete old stream now that the replacement has started downloading
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await self.delete(to_replace)
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if payment is not None:
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await self.wallet_manager.broadcast_or_release(payment)
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payment = None # to avoid releasing in `finally` later
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log.info("paid fee of %s for %s", dewies_to_lbc(stream.content_fee.outputs[0].amount), uri)
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await self.storage.save_content_fee(stream.stream_hash, stream.content_fee)
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self._sources[stream.sd_hash] = stream
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self.storage.content_claim_callbacks[stream.stream_hash] = lambda: self._update_content_claim(stream)
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await self.storage.save_content_claim(stream.stream_hash, outpoint)
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if save_file:
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await asyncio.wait_for(stream.save_file(node=self.node), timeout - (self.loop.time() - before_download),
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loop=self.loop)
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return stream
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except asyncio.TimeoutError:
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error = DownloadDataTimeoutError(stream.sd_hash)
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raise error
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except Exception as err: # forgive data timeout, don't delete stream
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expected = (DownloadSDTimeoutError, DownloadDataTimeoutError, InsufficientFundsError,
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KeyFeeAboveMaxAllowedError)
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if isinstance(err, expected):
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log.warning("Failed to download %s: %s", uri, str(err))
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elif isinstance(err, asyncio.CancelledError):
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pass
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else:
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log.exception("Unexpected error downloading stream:")
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error = err
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raise
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finally:
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if payment is not None:
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# payment is set to None after broadcasting, if we're here an exception probably happened
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await self.wallet_manager.ledger.release_tx(payment)
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if self.analytics_manager and (error or (stream and (stream.downloader.time_to_descriptor or
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stream.downloader.time_to_first_bytes))):
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server = self.wallet_manager.ledger.network.client.server
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self.loop.create_task(
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self.analytics_manager.send_time_to_first_bytes(
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resolved_time, self.loop.time() - start_time, None if not stream else stream.download_id,
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uri, outpoint,
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None if not stream else len(stream.downloader.blob_downloader.active_connections),
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None if not stream else len(stream.downloader.blob_downloader.scores),
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None if not stream else len(stream.downloader.blob_downloader.connection_failures),
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False if not stream else stream.downloader.added_fixed_peers,
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self.config.fixed_peer_delay if not stream else stream.downloader.fixed_peers_delay,
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None if not stream else stream.sd_hash,
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None if not stream else stream.downloader.time_to_descriptor,
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None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].blob_hash,
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None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].length,
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None if not stream else stream.downloader.time_to_first_bytes,
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None if not error else error.__class__.__name__,
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None if not error else str(error),
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None if not server else f"{server[0]}:{server[1]}"
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)
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)
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async def stream_partial_content(self, request: Request, sd_hash: str):
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return await self._sources[sd_hash].stream_file(request, self.node)
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def get_filtered(self, sort_by: Optional[str] = None, reverse: Optional[bool] = False,
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comparison: Optional[str] = None, **search_by) -> typing.List[ManagedDownloadSource]:
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"""
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Get a list of filtered and sorted ManagedStream objects
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:param sort_by: field to sort by
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:param reverse: reverse sorting
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:param comparison: comparison operator used for filtering
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:param search_by: fields and values to filter by
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"""
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if sort_by and sort_by not in self.filter_fields:
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raise ValueError(f"'{sort_by}' is not a valid field to sort by")
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if comparison and comparison not in comparison_operators:
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raise ValueError(f"'{comparison}' is not a valid comparison")
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if 'full_status' in search_by:
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del search_by['full_status']
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for search in search_by.keys():
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if search not in self.filter_fields:
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raise ValueError(f"'{search}' is not a valid search operation")
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if search_by:
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comparison = comparison or 'eq'
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sources = []
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for stream in self._sources.values():
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for search, val in search_by.items():
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if comparison_operators[comparison](getattr(stream, search), val):
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sources.append(stream)
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break
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else:
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sources = list(self._sources.values())
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if sort_by:
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sources.sort(key=lambda s: getattr(s, sort_by))
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if reverse:
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sources.reverse()
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return sources
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# @cache_concurrent
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# async def download_from_uri(self, uri, exchange_rate_manager: 'ExchangeRateManager',
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# timeout: Optional[float] = None, file_name: Optional[str] = None,
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# download_directory: Optional[str] = None,
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# save_file: Optional[bool] = None, resolve_timeout: float = 3.0,
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# wallet: Optional['Wallet'] = None) -> ManagedDownloadSource:
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# wallet = wallet or self.wallet_manager.default_wallet
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# timeout = timeout or self.config.download_timeout
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# start_time = self.loop.time()
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# resolved_time = None
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# stream = None
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# txo: Optional[Output] = None
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# error = None
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# outpoint = None
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# if save_file is None:
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# save_file = self.config.save_files
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# if file_name and not save_file:
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# save_file = True
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# if save_file:
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# download_directory = download_directory or self.config.download_dir
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# else:
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# download_directory = None
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#
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# payment = None
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# try:
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# # resolve the claim
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# if not URL.parse(uri).has_stream:
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# raise ResolveError("cannot download a channel claim, specify a /path")
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# try:
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# response = await asyncio.wait_for(
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# self.wallet_manager.ledger.resolve(wallet.accounts, [uri]),
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# resolve_timeout
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# )
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# resolved_result = {}
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# for url, txo in response.items():
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# if isinstance(txo, Output):
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# tx_height = txo.tx_ref.height
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# best_height = self.wallet_manager.ledger.headers.height
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# resolved_result[url] = {
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# 'name': txo.claim_name,
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# 'value': txo.claim,
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# 'protobuf': binascii.hexlify(txo.claim.to_bytes()),
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# 'claim_id': txo.claim_id,
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# 'txid': txo.tx_ref.id,
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# 'nout': txo.position,
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# 'amount': dewies_to_lbc(txo.amount),
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# 'effective_amount': txo.meta.get('effective_amount', 0),
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# 'height': tx_height,
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# 'confirmations': (best_height + 1) - tx_height if tx_height > 0 else tx_height,
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# 'claim_sequence': -1,
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# 'address': txo.get_address(self.wallet_manager.ledger),
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# 'valid_at_height': txo.meta.get('activation_height', None),
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# 'timestamp': self.wallet_manager.ledger.headers[tx_height]['timestamp'],
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# 'supports': []
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# }
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# else:
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# resolved_result[url] = txo
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# except asyncio.TimeoutError:
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# raise ResolveTimeoutError(uri)
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# except Exception as err:
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# if isinstance(err, asyncio.CancelledError):
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# raise
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# log.exception("Unexpected error resolving stream:")
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# raise ResolveError(f"Unexpected error resolving stream: {str(err)}")
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# await self.storage.save_claims_for_resolve([
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# value for value in resolved_result.values() if 'error' not in value
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# ])
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#
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# resolved = resolved_result.get(uri, {})
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# resolved = resolved if 'value' in resolved else resolved.get('claim')
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# if not resolved:
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# raise ResolveError(f"Failed to resolve stream at '{uri}'")
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# if 'error' in resolved:
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# raise ResolveError(f"error resolving stream: {resolved['error']}")
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# txo = response[uri]
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#
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# claim = Claim.from_bytes(binascii.unhexlify(resolved['protobuf']))
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# outpoint = f"{resolved['txid']}:{resolved['nout']}"
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# resolved_time = self.loop.time() - start_time
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#
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# # resume or update an existing stream, if the stream changed: download it and delete the old one after
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# updated_stream, to_replace = await self._check_update_or_replace(outpoint, resolved['claim_id'], claim)
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# if updated_stream:
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# log.info("already have stream for %s", uri)
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# if save_file and updated_stream.output_file_exists:
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# save_file = False
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# await updated_stream.start(node=self.node, timeout=timeout, save_now=save_file)
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# if not updated_stream.output_file_exists and (save_file or file_name or download_directory):
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# await updated_stream.save_file(
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# file_name=file_name, download_directory=download_directory, node=self.node
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# )
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# return updated_stream
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#
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# if not to_replace and txo.has_price and not txo.purchase_receipt:
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# payment = await manager.create_purchase_transaction(
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# wallet.accounts, txo, exchange_rate_manager
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# )
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#
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# stream = ManagedStream(
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# self.loop, self.config, self.blob_manager, claim.stream.source.sd_hash, download_directory,
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# file_name, ManagedStream.STATUS_RUNNING, content_fee=payment,
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# analytics_manager=self.analytics_manager
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# )
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# log.info("starting download for %s", uri)
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#
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# before_download = self.loop.time()
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# await stream.start(self.node, timeout)
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# stream.set_claim(resolved, claim)
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# if to_replace: # delete old stream now that the replacement has started downloading
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# await self.delete(to_replace)
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#
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# if payment is not None:
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# await manager.broadcast_or_release(payment)
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# payment = None # to avoid releasing in `finally` later
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# log.info("paid fee of %s for %s", dewies_to_lbc(stream.content_fee.outputs[0].amount), uri)
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# await self.storage.save_content_fee(stream.stream_hash, stream.content_fee)
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#
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# self._sources[stream.sd_hash] = stream
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# self.storage.content_claim_callbacks[stream.stream_hash] = lambda: self._update_content_claim(stream)
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# await self.storage.save_content_claim(stream.stream_hash, outpoint)
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# if save_file:
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# await asyncio.wait_for(stream.save_file(node=self.node), timeout - (self.loop.time() - before_download),
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# loop=self.loop)
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# return stream
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# except asyncio.TimeoutError:
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# error = DownloadDataTimeoutError(stream.sd_hash)
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# raise error
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# except Exception as err: # forgive data timeout, don't delete stream
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# expected = (DownloadSDTimeoutError, DownloadDataTimeoutError, InsufficientFundsError,
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# KeyFeeAboveMaxAllowedError)
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# if isinstance(err, expected):
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# log.warning("Failed to download %s: %s", uri, str(err))
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# elif isinstance(err, asyncio.CancelledError):
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# pass
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# else:
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# log.exception("Unexpected error downloading stream:")
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# error = err
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# raise
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# finally:
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# if payment is not None:
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# # payment is set to None after broadcasting, if we're here an exception probably happened
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# await manager.ledger.release_tx(payment)
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# if self.analytics_manager and (error or (stream and (stream.downloader.time_to_descriptor or
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# stream.downloader.time_to_first_bytes))):
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# server = self.wallet_manager.ledger.network.client.server
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# self.loop.create_task(
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# self.analytics_manager.send_time_to_first_bytes(
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# resolved_time, self.loop.time() - start_time, None if not stream else stream.download_id,
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# uri, outpoint,
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# None if not stream else len(stream.downloader.blob_downloader.active_connections),
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# None if not stream else len(stream.downloader.blob_downloader.scores),
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# None if not stream else len(stream.downloader.blob_downloader.connection_failures),
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# False if not stream else stream.downloader.added_fixed_peers,
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# self.config.fixed_peer_delay if not stream else stream.downloader.fixed_peers_delay,
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# None if not stream else stream.sd_hash,
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# None if not stream else stream.downloader.time_to_descriptor,
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# None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].blob_hash,
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# None if not (stream and stream.descriptor) else stream.descriptor.blobs[0].length,
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# None if not stream else stream.downloader.time_to_first_bytes,
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# None if not error else error.__class__.__name__,
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# None if not error else str(error),
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# None if not server else f"{server[0]}:{server[1]}"
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# )
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# )
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