import json import logging import os from datetime import datetime from twisted.internet import defer from twisted.internet.task import LoopingCall from lbrynet.core.Error import InvalidStreamInfoError, InsufficientFundsError from lbrynet.core.PaymentRateManager import PaymentRateManager from lbrynet.core.StreamDescriptor import download_sd_blob from lbrynet.lbryfilemanager.LBRYFileDownloader import ManagedLBRYFileDownloaderFactory from lbrynet.conf import DEFAULT_TIMEOUT log = logging.getLogger(__name__) class GetStream(object): def __init__(self, sd_identifier, session, wallet, lbry_file_manager, max_key_fee, pay_key=True, data_rate=0.5, timeout=DEFAULT_TIMEOUT): self.wallet = wallet self.resolved_name = None self.description = None self.key_fee = None self.key_fee_address = None self.data_rate = data_rate self.pay_key = pay_key self.name = None 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_path = None self.checker = LoopingCall(self.check_status) def check_status(self): self.timeout_counter += 1 if self.download_path and os.path.isfile(self.download_path): self.checker.stop() return defer.succeed(True) elif self.timeout_counter >= self.timeout: log.info("Timeout downloading " + str(self.stream_info)) self.checker.stop() self.d.cancel() def start(self, stream_info): self.stream_info = stream_info if 'stream_hash' in self.stream_info.keys(): self.description = self.stream_info['description'] if 'key_fee' in self.stream_info.keys(): self.key_fee = float(self.stream_info['key_fee']) if 'key_fee_address' in self.stream_info.keys(): self.key_fee_address = self.stream_info['key_fee_address'] else: self.key_fee_address = None else: self.key_fee = None self.key_fee_address = None self.stream_hash = self.stream_info['stream_hash'] if isinstance(self.stream_hash, dict): self.stream_hash = self.stream_hash['sd_hash'] else: log.error("InvalidStreamInfoError in autofetcher: ", stream_info) raise InvalidStreamInfoError(self.stream_info) if self.key_fee > self.max_key_fee: if self.pay_key: log.info("Key fee (" + str(self.key_fee) + ") above limit of " + str( self.max_key_fee) + ", didn't download lbry://" + str(self.resolved_name)) return defer.fail(None) else: pass self.checker.start(1) 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 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)) self.d.addErrback(lambda err: err.trap(defer.CancelledError)) self.d.addErrback(lambda err: log.error("An exception occurred attempting to load the stream descriptor: %s", err.getTraceback())) self.d.addCallback(self._start_download) self.d.callback(None) return self.d def _start_download(self, downloader): def _pay_key_fee(): if self.key_fee is not None and self.key_fee_address is not None: reserved_points = self.wallet.reserve_points(self.key_fee_address, self.key_fee) if reserved_points is None: return defer.fail(InsufficientFundsError()) log.info("Key fee: " + str(self.key_fee) + " | " + str(self.key_fee_address)) return self.wallet.send_points_to_address(reserved_points, self.key_fee) return defer.succeed(None) if self.pay_key: d = _pay_key_fee() else: d = defer.Deferred() downloader.start() self.download_path = os.path.join(downloader.download_directory, downloader.file_name) d.addCallback(lambda _: log.info("Downloading " + str(self.stream_hash) + " --> " + str(self.download_path))) return d class FetcherDaemon(object): def __init__(self, session, lbry_file_manager, lbry_file_metadata_manager, wallet, sd_identifier, autofetcher_conf, verbose=False): self.autofetcher_conf = autofetcher_conf self.max_key_fee = 0.0 self.sd_identifier = sd_identifier self.wallet = wallet self.session = session self.lbry_file_manager = lbry_file_manager self.lbry_metadata_manager = lbry_file_metadata_manager self.seen = [] self.lastbestblock = None self.search = None self.first_run = True self.is_running = False self.verbose = verbose self._get_autofetcher_conf() def start(self): if not self.is_running: self.is_running = True self.search = LoopingCall(self._looped_search) self.search.start(1) log.info("Starting autofetcher") else: log.info("Autofetcher is already running") def stop(self): if self.is_running: self.search.stop() self.is_running = False else: log.info("Autofetcher isn't running, there's nothing to stop") def check_if_running(self): if self.is_running: msg = "Autofetcher is running\n" msg += "Last block hash: " + str(self.lastbestblock) else: msg = "Autofetcher is not running" return msg def _get_names(self): d = self.wallet.get_best_blockhash() d.addCallback(lambda blockhash: get_new_streams(blockhash) if blockhash != self.lastbestblock else []) def get_new_streams(blockhash): self.lastbestblock = blockhash d = self.wallet.get_block(blockhash) d.addCallback(lambda block: get_new_streams_in_txes(block['tx'], blockhash)) return d def get_new_streams_in_txes(txids, blockhash): ds = [] for t in txids: d = self.wallet.get_claims_from_tx(t) d.addCallback(get_new_streams_in_tx, t, blockhash) ds.append(d) d = defer.DeferredList(ds, consumeErrors=True) d.addCallback(lambda result: [r[1] for r in result if r[0]]) d.addCallback(lambda stream_lists: [stream for streams in stream_lists for stream in streams]) return d def get_new_streams_in_tx(claims, t, blockhash): rtn = [] if claims: for claim in claims: if claim not in self.seen: msg = "[" + str(datetime.now()) + "] New claim | lbry://" + str(claim['name']) + \ " | stream hash: " + str(json.loads(claim['value'])['stream_hash']) log.info(msg) if self.verbose: print msg rtn.append((claim['name'], t)) self.seen.append(claim) else: if self.verbose: print "[" + str(datetime.now()) + "] No claims in block", blockhash return rtn d.addCallback(lambda streams: defer.DeferredList( [self.wallet.get_stream_info_from_txid(name, t) for name, t in streams])) return d def _download_claims(self, claims): if claims: for claim in claims: stream = GetStream(self.sd_identifier, self.session, self.wallet, self.lbry_file_manager, self.max_key_fee, pay_key=False) stream.start(claim[1]) return defer.succeed(None) def _looped_search(self): d = self._get_names() d.addCallback(self._download_claims) return d def _get_autofetcher_conf(self): settings = {"maxkey": "0.0"} if os.path.exists(self.autofetcher_conf): conf = open(self.autofetcher_conf) for l in conf: if l.startswith("maxkey="): settings["maxkey"] = float(l[7:].rstrip('\n')) conf.close() else: conf = open(self.autofetcher_conf, "w") conf.write("maxkey=10.0") conf.close() settings["maxkey"] = 10.0 log.info("No autofetcher conf file found, making one with max key fee of 10.0") self.max_key_fee = settings["maxkey"]