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