258 lines
11 KiB
Python
258 lines
11 KiB
Python
"""
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Keep track of which LBRY Files are downloading and store their LBRY File specific metadata
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"""
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import os
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import logging
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from twisted.internet import defer, task, reactor
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from twisted.python.failure import Failure
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from lbrynet.core.Error import InvalidStreamDescriptorError
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from lbrynet.reflector.reupload import reflect_stream
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from lbrynet.core.PaymentRateManager import NegotiatedPaymentRateManager
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from lbrynet.file_manager.EncryptedFileDownloader import ManagedEncryptedFileDownloader
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from lbrynet.file_manager.EncryptedFileDownloader import ManagedEncryptedFileDownloaderFactory
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from lbrynet.core.StreamDescriptor import EncryptedFileStreamType, get_sd_info, validate_descriptor
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from lbrynet.cryptstream.client.CryptStreamDownloader import AlreadyStoppedError
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from lbrynet.cryptstream.client.CryptStreamDownloader import CurrentlyStoppingError
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from lbrynet.core.utils import safe_start_looping_call, safe_stop_looping_call
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from lbrynet import conf
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log = logging.getLogger(__name__)
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class EncryptedFileManager(object):
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"""
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Keeps track of currently opened LBRY Files, their options, and
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their LBRY File specific metadata.
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"""
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# when reflecting files, reflect up to this many files at a time
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CONCURRENT_REFLECTS = 5
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def __init__(self, session, sd_identifier):
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self.auto_re_reflect = conf.settings['reflect_uploads']
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self.auto_re_reflect_interval = conf.settings['auto_re_reflect_interval']
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self.session = session
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self.storage = session.storage
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# TODO: why is sd_identifier part of the file manager?
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self.sd_identifier = sd_identifier
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assert sd_identifier
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self.lbry_files = []
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self.lbry_file_reflector = task.LoopingCall(self.reflect_lbry_files)
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@defer.inlineCallbacks
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def setup(self):
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yield self._add_to_sd_identifier()
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d = self._start_lbry_files()
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d.addCallback(lambda _: log.info("Started file manager"))
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def get_lbry_file_status(self, lbry_file):
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return self.session.storage.get_lbry_file_status(lbry_file.rowid)
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def set_lbry_file_data_payment_rate(self, lbry_file, new_rate):
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return self.session.storage(lbry_file.rowid, new_rate)
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def change_lbry_file_status(self, lbry_file, status):
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log.debug("Changing status of %s to %s", lbry_file.stream_hash, status)
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return self.session.storage.change_file_status(lbry_file.rowid, status)
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def get_lbry_file_status_reports(self):
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ds = []
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for lbry_file in self.lbry_files:
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ds.append(lbry_file.status())
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dl = defer.DeferredList(ds)
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def filter_failures(status_reports):
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return [status_report for success, status_report in status_reports if success is True]
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dl.addCallback(filter_failures)
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return dl
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def _add_to_sd_identifier(self):
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downloader_factory = ManagedEncryptedFileDownloaderFactory(self)
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self.sd_identifier.add_stream_downloader_factory(
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EncryptedFileStreamType, downloader_factory)
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def _get_lbry_file(self, rowid, stream_hash, payment_rate_manager, sd_hash, key,
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stream_name, file_name, download_directory, suggested_file_name):
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return ManagedEncryptedFileDownloader(
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rowid,
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stream_hash,
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self.session.peer_finder,
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self.session.rate_limiter,
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self.session.blob_manager,
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self.session.storage,
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self,
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payment_rate_manager,
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self.session.wallet,
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download_directory,
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file_name,
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stream_name=stream_name,
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sd_hash=sd_hash,
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key=key,
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suggested_file_name=suggested_file_name
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)
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@defer.inlineCallbacks
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def _start_lbry_files(self):
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files = yield self.session.storage.get_all_lbry_files()
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b_prm = self.session.base_payment_rate_manager
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payment_rate_manager = NegotiatedPaymentRateManager(b_prm, self.session.blob_tracker)
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log.info("Trying to start %i files", len(files))
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for i, file_info in enumerate(files):
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if len(files) > 500 and i % 500 == 0:
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log.info("Started %i/%i files", i, len(files))
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lbry_file = self._get_lbry_file(
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file_info['row_id'], file_info['stream_hash'], payment_rate_manager, file_info['sd_hash'],
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file_info['key'], file_info['stream_name'], file_info['file_name'], file_info['download_directory'],
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file_info['suggested_file_name']
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)
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yield lbry_file.get_claim_info()
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try:
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# verify the stream is valid (we might have downloaded an invalid stream
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# in the past when the validation check didn't work)
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stream_info = yield get_sd_info(self.storage, file_info['stream_hash'], include_blobs=True)
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validate_descriptor(stream_info)
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except InvalidStreamDescriptorError as err:
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log.warning("Stream for descriptor %s is invalid (%s), cleaning it up",
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lbry_file.sd_hash, err.message)
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yield lbry_file.delete_data()
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yield self.session.storage.delete_stream(lbry_file.stream_hash)
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else:
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try:
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# restore will raise an Exception if status is unknown
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lbry_file.restore(file_info['status'])
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self.storage.content_claim_callbacks[lbry_file.stream_hash] = lbry_file.get_claim_info
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self.lbry_files.append(lbry_file)
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except Exception:
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log.warning("Failed to start %i", file_info.get('rowid'))
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log.info("Started %i lbry files", len(self.lbry_files))
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if self.auto_re_reflect is True:
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safe_start_looping_call(self.lbry_file_reflector, self.auto_re_reflect_interval)
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@defer.inlineCallbacks
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def _stop_lbry_file(self, lbry_file):
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def wait_for_finished(lbry_file, count=2):
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if count or lbry_file.saving_status is not False:
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return task.deferLater(reactor, 1, self._stop_lbry_file, lbry_file,
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count=count - 1)
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try:
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yield lbry_file.stop(change_status=False)
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self.lbry_files.remove(lbry_file)
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except CurrentlyStoppingError:
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yield wait_for_finished(lbry_file)
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except AlreadyStoppedError:
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pass
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finally:
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defer.returnValue(None)
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def _stop_lbry_files(self):
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log.info("Stopping %i lbry files", len(self.lbry_files))
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lbry_files = self.lbry_files
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for lbry_file in lbry_files:
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yield self._stop_lbry_file(lbry_file)
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@defer.inlineCallbacks
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def add_published_file(self, stream_hash, sd_hash, download_directory, payment_rate_manager, blob_data_rate):
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status = ManagedEncryptedFileDownloader.STATUS_FINISHED
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stream_metadata = yield get_sd_info(self.session.storage, stream_hash, include_blobs=False)
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key = stream_metadata['key']
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stream_name = stream_metadata['stream_name']
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file_name = stream_metadata['suggested_file_name']
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rowid = yield self.storage.save_published_file(
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stream_hash, file_name, download_directory, blob_data_rate, status
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)
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lbry_file = self._get_lbry_file(
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rowid, stream_hash, payment_rate_manager, sd_hash, key, stream_name, file_name, download_directory,
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stream_metadata['suggested_file_name']
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)
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lbry_file.restore(status)
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yield lbry_file.get_claim_info()
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self.storage.content_claim_callbacks[stream_hash] = lbry_file.get_claim_info
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self.lbry_files.append(lbry_file)
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defer.returnValue(lbry_file)
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@defer.inlineCallbacks
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def add_downloaded_file(self, stream_hash, sd_hash, download_directory, payment_rate_manager=None,
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blob_data_rate=None, status=None, file_name=None):
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status = status or ManagedEncryptedFileDownloader.STATUS_STOPPED
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payment_rate_manager = payment_rate_manager or self.session.payment_rate_manager
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blob_data_rate = blob_data_rate or payment_rate_manager.min_blob_data_payment_rate
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stream_metadata = yield get_sd_info(self.session.storage, stream_hash, include_blobs=False)
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key = stream_metadata['key']
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stream_name = stream_metadata['stream_name']
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file_name = file_name or stream_metadata['suggested_file_name']
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# when we save the file we'll atomic touch the nearest file to the suggested file name
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# that doesn't yet exist in the download directory
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rowid = yield self.storage.save_downloaded_file(
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stream_hash, os.path.basename(file_name.decode('hex')).encode('hex'), download_directory, blob_data_rate
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)
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file_name = yield self.session.storage.get_filename_for_rowid(rowid)
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lbry_file = self._get_lbry_file(
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rowid, stream_hash, payment_rate_manager, sd_hash, key, stream_name, file_name, download_directory,
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stream_metadata['suggested_file_name']
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)
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lbry_file.restore(status)
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yield lbry_file.get_claim_info(include_supports=False)
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self.storage.content_claim_callbacks[stream_hash] = lbry_file.get_claim_info
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self.lbry_files.append(lbry_file)
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defer.returnValue(lbry_file)
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@defer.inlineCallbacks
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def delete_lbry_file(self, lbry_file, delete_file=False):
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if lbry_file not in self.lbry_files:
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raise ValueError("Could not find that LBRY file")
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def wait_for_finished(count=2):
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if count <= 0 or lbry_file.saving_status is False:
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return True
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else:
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return task.deferLater(reactor, 1, wait_for_finished, count=count - 1)
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full_path = os.path.join(lbry_file.download_directory, lbry_file.file_name)
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try:
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yield lbry_file.stop()
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except (AlreadyStoppedError, CurrentlyStoppingError):
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yield wait_for_finished()
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self.lbry_files.remove(lbry_file)
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if lbry_file.stream_hash in self.storage.content_claim_callbacks:
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del self.storage.content_claim_callbacks[lbry_file.stream_hash]
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yield lbry_file.delete_data()
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yield self.session.storage.delete_stream(lbry_file.stream_hash)
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if delete_file and os.path.isfile(full_path):
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os.remove(full_path)
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defer.returnValue(True)
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def toggle_lbry_file_running(self, lbry_file):
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"""Toggle whether a stream reader is currently running"""
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for l in self.lbry_files:
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if l == lbry_file:
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return l.toggle_running()
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return defer.fail(Failure(ValueError("Could not find that LBRY file")))
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@defer.inlineCallbacks
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def reflect_lbry_files(self):
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sem = defer.DeferredSemaphore(self.CONCURRENT_REFLECTS)
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ds = []
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for lbry_file in self.lbry_files:
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ds.append(sem.run(reflect_stream, lbry_file))
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yield defer.DeferredList(ds)
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@defer.inlineCallbacks
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def stop(self):
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safe_stop_looping_call(self.lbry_file_reflector)
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yield defer.DeferredList(list(self._stop_lbry_files()))
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log.info("Stopped encrypted file manager")
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defer.returnValue(True)
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