152 lines
6.5 KiB
Python
152 lines
6.5 KiB
Python
import json
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import logging
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import os
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import sys
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from appdirs import user_data_dir
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from datetime import datetime
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from twisted.internet import defer
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from twisted.internet.task import LoopingCall
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from lbrynet.core.Error import InvalidStreamInfoError, InsufficientFundsError
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from lbrynet.core.PaymentRateManager import PaymentRateManager
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from lbrynet.core.StreamDescriptor import download_sd_blob
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from lbrynet.lbryfilemanager.LBRYFileDownloader import ManagedLBRYFileDownloaderFactory
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from lbrynet.conf import DEFAULT_TIMEOUT, LOG_FILE_NAME
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INITIALIZING_CODE = 'initializing'
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DOWNLOAD_METADATA_CODE = 'downloading_metadata'
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DOWNLOAD_TIMEOUT_CODE = 'timeout'
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DOWNLOAD_RUNNING_CODE = 'running'
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DOWNLOAD_STOPPED_CODE = 'stopped'
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STREAM_STAGES = [
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(INITIALIZING_CODE, 'Initializing...'),
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(DOWNLOAD_METADATA_CODE, 'Downloading metadata'),
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(DOWNLOAD_RUNNING_CODE, 'Started stream'),
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(DOWNLOAD_STOPPED_CODE, 'Paused stream'),
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(DOWNLOAD_TIMEOUT_CODE, 'Stream timed out')
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]
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if sys.platform != "darwin":
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log_dir = os.path.join(os.path.expanduser("~"), ".lbrynet")
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else:
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log_dir = user_data_dir("LBRY")
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if not os.path.isdir(log_dir):
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os.mkdir(log_dir)
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lbrynet_log = os.path.join(log_dir, LOG_FILE_NAME)
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log = logging.getLogger(__name__)
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handler = logging.handlers.RotatingFileHandler(lbrynet_log, maxBytes=2097152, backupCount=5)
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log.addHandler(handler)
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log.setLevel(logging.INFO)
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class GetStream(object):
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def __init__(self, sd_identifier, session, wallet, lbry_file_manager, max_key_fee, data_rate=0.5,
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timeout=DEFAULT_TIMEOUT, download_directory=None, file_name=None):
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self.wallet = wallet
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self.resolved_name = None
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self.description = None
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self.key_fee = None
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self.key_fee_address = None
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self.data_rate = data_rate
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self.name = None
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self.file_name = file_name
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self.session = session
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self.payment_rate_manager = PaymentRateManager(self.session.base_payment_rate_manager)
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self.lbry_file_manager = lbry_file_manager
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self.sd_identifier = sd_identifier
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self.stream_hash = None
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self.max_key_fee = max_key_fee
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self.stream_info = None
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self.stream_info_manager = None
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self.d = defer.Deferred(None)
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self.timeout = timeout
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self.timeout_counter = 0
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self.download_directory = download_directory
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self.download_path = None
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self.downloader = None
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self.finished = defer.Deferred()
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self.checker = LoopingCall(self.check_status)
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self.code = STREAM_STAGES[0]
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def check_status(self):
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self.timeout_counter += 1
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if self.download_path:
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self.checker.stop()
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self.finished.callback((self.stream_hash, self.download_path))
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elif self.timeout_counter >= self.timeout:
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log.info("Timeout downloading lbry://%s" % self.resolved_name)
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self.checker.stop()
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self.d.cancel()
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self.code = STREAM_STAGES[4]
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self.finished.callback(False)
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def start(self, stream_info, name):
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self.resolved_name = name
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self.stream_info = stream_info
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if 'sources' in self.stream_info:
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self.stream_hash = self.stream_info['sources']['lbry_sd_hash']
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else:
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raise InvalidStreamInfoError(self.stream_info)
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if 'description' in self.stream_info:
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self.description = self.stream_info['description']
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if 'fee' in self.stream_info:
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if 'LBC' in self.stream_info['fee']:
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self.key_fee = float(self.stream_info['fee']['LBC']['amount'])
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self.key_fee_address = self.stream_info['fee']['LBC']['address']
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else:
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self.key_fee_address = None
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else:
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self.key_fee = None
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self.key_fee_address = None
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if self.key_fee > self.max_key_fee:
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log.info("Key fee %f above limit of %f didn't download lbry://%s" % (self.key_fee, self.max_key_fee, self.resolved_name))
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return defer.fail(None)
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else:
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pass
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def _cause_timeout():
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self.timeout_counter = self.timeout * 2
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def _set_status(x, status):
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log.info("Download lbry://%s status changed to %s" % (self.resolved_name, status))
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self.code = next(s for s in STREAM_STAGES if s[0] == status)
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return x
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self.checker.start(1)
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self.d.addCallback(lambda _: _set_status(None, DOWNLOAD_METADATA_CODE))
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self.d.addCallback(lambda _: download_sd_blob(self.session, self.stream_hash, self.payment_rate_manager))
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self.d.addCallback(self.sd_identifier.get_metadata_for_sd_blob)
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self.d.addCallback(lambda r: _set_status(r, DOWNLOAD_RUNNING_CODE))
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self.d.addCallback(lambda metadata: (next(factory for factory in metadata.factories if isinstance(factory, ManagedLBRYFileDownloaderFactory)),
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metadata))
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self.d.addCallback(lambda (factory, metadata): factory.make_downloader(metadata,
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[self.data_rate, True],
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self.payment_rate_manager,
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download_directory=self.download_directory,
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file_name=self.file_name))
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self.d.addCallbacks(self._start_download, lambda _: _cause_timeout())
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self.d.callback(None)
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return self.finished
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def _start_download(self, downloader):
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def _pay_key_fee():
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if self.key_fee is not None and self.key_fee_address is not None:
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reserved_points = self.wallet.reserve_points(self.key_fee_address, self.key_fee)
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if reserved_points is None:
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return defer.fail(InsufficientFundsError())
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log.info("Key fee: %f --> %s" % (self.key_fee, self.key_fee_address))
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return self.wallet.send_points_to_address(reserved_points, self.key_fee)
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return defer.succeed(None)
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d = _pay_key_fee()
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self.downloader = downloader
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self.download_path = os.path.join(downloader.download_directory, downloader.file_name)
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d.addCallback(lambda _: log.info("Downloading %s --> %s", self.stream_hash, self.downloader.file_name))
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d.addCallback(lambda _: self.downloader.start())
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