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 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): 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 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'] else: print 'InvalidStreamInfoError' raise InvalidStreamInfoError(self.stream_info) if self.key_fee > self.max_key_fee: if self.pay_key: print "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 d = defer.Deferred(None) d.addCallback(lambda _: download_sd_blob(self.session, self.stream_hash, self.payment_rate_manager)) d.addCallback(self.sd_identifier.get_metadata_for_sd_blob) d.addCallback(lambda metadata: metadata.factories[1].make_downloader(metadata, [self.data_rate, True], self.payment_rate_manager)) d.addErrback(lambda err: err.trap(defer.CancelledError)) d.addErrback(lambda err: log.error("An exception occurred attempting to load the stream descriptor: %s", err.getTraceback())) d.addCallback(self._start_download) d.callback(None) return 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()) print '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() print "Downloading", self.stream_hash, "-->", os.path.join(downloader.download_directory, downloader.file_name) 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) else: print "Autofetcher is already running" def stop(self): if self.is_running: self.search.stop() self.is_running = False else: print "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['bestblockhash']) else: msg = "Autofetcher is not running" return msg def _get_names(self): c = self.wallet.get_blockchain_info() rtn = [] if self.lastbestblock != c: block = self.wallet.get_block(c['bestblockhash']) txids = block['tx'] transactions = [self.wallet.get_tx(t) for t in txids] for t in transactions: claims = self.wallet.get_claims_for_tx(t['txid']) # if self.first_run: # # claims = self.rpc_conn.getclaimsfortx("96aca2c60efded5806b7336430c5987b9092ffbea9c6ed444e3bf8e008993e11") # # claims = self.rpc_conn.getclaimsfortx("cc9c7f5225ecb38877e6ca7574d110b23214ac3556b9d65784065ad3a85b4f74") # self.first_run = False 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']) print msg log.debug(msg) rtn.append([claim['name'], t['txid']]) self.seen.append(claim) else: if self.verbose: print "[" + str(datetime.now()) + "] No claims in block", c['bestblockhash'] self.lastbestblock = c if len(rtn): return defer.DeferredList([self.wallet.get_stream_info_for_name(name, txid=t) for name, t in rtn]) def _download_claims(self, claims): if claims: for claim in claims: download = defer.Deferred() stream = GetStream(self.sd_identifier, self.session, self.wallet, self.lbry_file_manager, self.max_key_fee, pay_key=False) download.addCallback(lambda _: stream.start(claim[1])) download.callback(None) return defer.succeed(None) def _looped_search(self): d = defer.Deferred() d.addCallback(lambda _: self._get_names()) d.addCallback(self._download_claims) d.callback(None) 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')) print "Autofetcher using max key price of", settings["maxkey"], ", to start call start_fetcher()" else: print "Autofetcher using default max key price of 0.0" print "To change this create the file:" print str(self.autofetcher_conf) print "Example contents of conf file:" print "maxkey=1.0" self.max_key_fee = settings["maxkey"]