import os import asyncio import binascii import logging import random import typing from typing import Optional from aiohttp.web import Request from lbry.error import InvalidStreamDescriptorError from lbry.file.source_manager import SourceManager from lbry.stream.descriptor import StreamDescriptor from lbry.stream.managed_stream import ManagedStream from lbry.file.source import ManagedDownloadSource if typing.TYPE_CHECKING: from lbry.conf import Config from lbry.blob.blob_manager import BlobManager from lbry.dht.node import Node from lbry.wallet.wallet import WalletManager from lbry.wallet.transaction import Transaction from lbry.extras.daemon.analytics import AnalyticsManager from lbry.extras.daemon.storage import SQLiteStorage, StoredContentClaim log = logging.getLogger(__name__) def path_or_none(encoded_path) -> Optional[str]: if not encoded_path: return return binascii.unhexlify(encoded_path).decode() class StreamManager(SourceManager): _sources: typing.Dict[str, ManagedStream] filter_fields = SourceManager.filter_fields filter_fields.update({ 'sd_hash', 'stream_hash', 'full_status', # TODO: remove 'blobs_remaining', 'blobs_in_stream', 'uploading_to_reflector', 'is_fully_reflected' }) def __init__(self, loop: asyncio.AbstractEventLoop, config: 'Config', blob_manager: 'BlobManager', wallet_manager: 'WalletManager', storage: 'SQLiteStorage', node: Optional['Node'], analytics_manager: Optional['AnalyticsManager'] = None): super().__init__(loop, config, storage, analytics_manager) self.blob_manager = blob_manager self.wallet_manager = wallet_manager self.node = node self.resume_saving_task: Optional[asyncio.Task] = None self.re_reflect_task: Optional[asyncio.Task] = None self.update_stream_finished_futs: typing.List[asyncio.Future] = [] self.running_reflector_uploads: typing.Dict[str, asyncio.Task] = {} self.started = asyncio.Event(loop=self.loop) @property def streams(self): return self._sources def add(self, source: ManagedStream): super().add(source) self.storage.content_claim_callbacks[source.stream_hash] = lambda: self._update_content_claim(source) async def _update_content_claim(self, stream: ManagedStream): claim_info = await self.storage.get_content_claim(stream.stream_hash) self._sources.setdefault(stream.sd_hash, stream).set_claim(claim_info, claim_info['value']) async def recover_streams(self, file_infos: typing.List[typing.Dict]): to_restore = [] async def recover_stream(sd_hash: str, stream_hash: str, stream_name: str, suggested_file_name: str, key: str, content_fee: Optional['Transaction']) -> Optional[StreamDescriptor]: sd_blob = self.blob_manager.get_blob(sd_hash) blobs = await self.storage.get_blobs_for_stream(stream_hash) descriptor = await StreamDescriptor.recover( self.blob_manager.blob_dir, sd_blob, stream_hash, stream_name, suggested_file_name, key, blobs ) if not descriptor: return to_restore.append((descriptor, sd_blob, content_fee)) await asyncio.gather(*[ recover_stream( file_info['sd_hash'], file_info['stream_hash'], binascii.unhexlify(file_info['stream_name']).decode(), binascii.unhexlify(file_info['suggested_file_name']).decode(), file_info['key'], file_info['content_fee'] ) for file_info in file_infos ]) if to_restore: await self.storage.recover_streams(to_restore, self.config.download_dir) # if self.blob_manager._save_blobs: # log.info("Recovered %i/%i attempted streams", len(to_restore), len(file_infos)) async def _load_stream(self, rowid: int, sd_hash: str, file_name: Optional[str], download_directory: Optional[str], status: str, claim: Optional['StoredContentClaim'], content_fee: Optional['Transaction'], added_on: Optional[int], fully_reflected: Optional[bool]): try: descriptor = await self.blob_manager.get_stream_descriptor(sd_hash) except InvalidStreamDescriptorError as err: log.warning("Failed to start stream for sd %s - %s", sd_hash, str(err)) return stream = ManagedStream( self.loop, self.config, self.blob_manager, descriptor.sd_hash, download_directory, file_name, status, claim, content_fee=content_fee, rowid=rowid, descriptor=descriptor, analytics_manager=self.analytics_manager, added_on=added_on ) if fully_reflected: stream.fully_reflected.set() self.add(stream) async def initialize_from_database(self): to_recover = [] to_start = [] await self.storage.update_manually_removed_files_since_last_run() for file_info in await self.storage.get_all_lbry_files(): # if the sd blob is not verified, try to reconstruct it from the database # this could either be because the blob files were deleted manually or save_blobs was not true when # the stream was downloaded if not self.blob_manager.is_blob_verified(file_info['sd_hash']): to_recover.append(file_info) to_start.append(file_info) if to_recover: await self.recover_streams(to_recover) log.info("Initializing %i files", len(to_start)) to_resume_saving = [] add_stream_tasks = [] for file_info in to_start: file_name = path_or_none(file_info['file_name']) download_directory = path_or_none(file_info['download_directory']) if file_name and download_directory and not file_info['saved_file'] and file_info['status'] == 'running': to_resume_saving.append((file_name, download_directory, file_info['sd_hash'])) add_stream_tasks.append(self.loop.create_task(self._load_stream( file_info['rowid'], file_info['sd_hash'], file_name, download_directory, file_info['status'], file_info['claim'], file_info['content_fee'], file_info['added_on'], file_info['fully_reflected'] ))) if add_stream_tasks: await asyncio.gather(*add_stream_tasks, loop=self.loop) log.info("Started stream manager with %i files", len(self._sources)) if not self.node: log.info("no DHT node given, resuming downloads trusting that we can contact reflector") if to_resume_saving: log.info("Resuming saving %i files", len(to_resume_saving)) self.resume_saving_task = asyncio.ensure_future(asyncio.gather( *(self._sources[sd_hash].save_file(file_name, download_directory) for (file_name, download_directory, sd_hash) in to_resume_saving), loop=self.loop )) async def reflect_streams(self): try: return await self._reflact_streams() except asyncio.CancelledError: raise except Exception: log.exception("reflector task encountered an unexpected error!") async def _reflact_streams(self): # todo: those debug statements are temporary for #2987 - remove them if its closed while True: if self.config.reflect_streams and self.config.reflector_servers: log.debug("collecting streams to reflect") sd_hashes = await self.storage.get_streams_to_re_reflect() sd_hashes = [sd for sd in sd_hashes if sd in self._sources] batch = [] while sd_hashes: stream = self.streams[sd_hashes.pop()] if self.blob_manager.is_blob_verified(stream.sd_hash) and stream.blobs_completed and \ stream.sd_hash not in self.running_reflector_uploads and not \ stream.fully_reflected.is_set(): batch.append(self.reflect_stream(stream)) if len(batch) >= self.config.concurrent_reflector_uploads: log.debug("waiting for batch of %s reflecting streams", len(batch)) await asyncio.gather(*batch, loop=self.loop) log.debug("done processing %s streams", len(batch)) batch = [] if batch: log.debug("waiting for batch of %s reflecting streams", len(batch)) await asyncio.gather(*batch, loop=self.loop) log.debug("done processing %s streams", len(batch)) await asyncio.sleep(300, loop=self.loop) async def start(self): await super().start() self.re_reflect_task = self.loop.create_task(self.reflect_streams()) def stop(self): super().stop() if self.resume_saving_task and not self.resume_saving_task.done(): self.resume_saving_task.cancel() if self.re_reflect_task and not self.re_reflect_task.done(): self.re_reflect_task.cancel() while self.update_stream_finished_futs: self.update_stream_finished_futs.pop().cancel() while self.running_reflector_uploads: _, t = self.running_reflector_uploads.popitem() t.cancel() self.started.clear() log.info("finished stopping the stream manager") def reflect_stream(self, stream: ManagedStream, server: Optional[str] = None, port: Optional[int] = None) -> asyncio.Task: if not server or not port: server, port = random.choice(self.config.reflector_servers) if stream.sd_hash in self.running_reflector_uploads: return self.running_reflector_uploads[stream.sd_hash] task = self.loop.create_task(stream.upload_to_reflector(server, port)) self.running_reflector_uploads[stream.sd_hash] = task task.add_done_callback( lambda _: None if stream.sd_hash not in self.running_reflector_uploads else self.running_reflector_uploads.pop(stream.sd_hash) ) return task async def create(self, file_path: str, key: Optional[bytes] = None, iv_generator: Optional[typing.Generator[bytes, None, None]] = None) -> ManagedStream: descriptor = await StreamDescriptor.create_stream( self.loop, self.blob_manager.blob_dir, file_path, key=key, iv_generator=iv_generator, blob_completed_callback=self.blob_manager.blob_completed ) await self.storage.store_stream( self.blob_manager.get_blob(descriptor.sd_hash), descriptor ) row_id = await self.storage.save_published_file( descriptor.stream_hash, os.path.basename(file_path), os.path.dirname(file_path), 0 ) stream = ManagedStream( self.loop, self.config, self.blob_manager, descriptor.sd_hash, os.path.dirname(file_path), os.path.basename(file_path), status=ManagedDownloadSource.STATUS_FINISHED, rowid=row_id, descriptor=descriptor ) self.streams[stream.sd_hash] = stream self.storage.content_claim_callbacks[stream.stream_hash] = lambda: self._update_content_claim(stream) if self.config.reflect_streams and self.config.reflector_servers: self.reflect_stream(stream) return stream async def delete(self, source: ManagedDownloadSource, delete_file: Optional[bool] = False): if not isinstance(source, ManagedStream): return if source.identifier in self.running_reflector_uploads: self.running_reflector_uploads[source.identifier].cancel() source.stop_tasks() if source.identifier in self.streams: del self.streams[source.identifier] blob_hashes = [source.identifier] + [b.blob_hash for b in source.descriptor.blobs[:-1]] await self.blob_manager.delete_blobs(blob_hashes, delete_from_db=False) await self.storage.delete_stream(source.descriptor) if delete_file and source.output_file_exists: os.remove(source.full_path) async def stream_partial_content(self, request: Request, sd_hash: str): stream = self._sources[sd_hash] if not stream.downloader.node: stream.downloader.node = self.node return await stream.stream_file(request)