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): self.finished_deferred = defer.Deferred(None) self.wallet = wallet self.resolved_name = None self.description = None self.key_fee = None self.key_fee_address = None self.name = None self.session = session self.payment_rate_manager = PaymentRateManager(self.session.base_payment_rate_manager) self.loading_metadata_deferred = defer.Deferred() self.lbry_file_manager = lbry_file_manager self.sd_identifier = sd_identifier self.metadata = None self.loading_failed = False self.resolved_name = None self.description = None self.key_fee = None self.key_fee_address = None self.stream_hash = None self.max_key_fee = max_key_fee self.stream_info = None self.stream_info_manager = None self.downloader = None self.pay_key = pay_key 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'] elif 'stream_hash' in json.loads(self.stream_info['value']): self.resolved_name = self.stream_info.get('name', None) self.description = json.loads(self.stream_info['value']).get('description', None) try: if 'key_fee' in json.loads(self.stream_info['value']): self.key_fee = float(json.loads(self.stream_info['value'])['key_fee']) except ValueError: self.key_fee = None self.key_fee_address = json.loads(self.stream_info['value']).get('key_fee_address', None) self.stream_hash = json.loads(self.stream_info['value'])['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 self.finished_deferred.callback(None) else: pass def _get_downloader_for_return(): return defer.succeed(self.downloader) self.loading_metadata_deferred = defer.Deferred(None) self.loading_metadata_deferred.addCallback( lambda _: download_sd_blob(self.session, self.stream_hash, self.payment_rate_manager)) self.loading_metadata_deferred.addCallback(self.sd_identifier.get_metadata_for_sd_blob) self.loading_metadata_deferred.addCallback(self._handle_metadata) self.loading_metadata_deferred.addErrback(self._handle_load_canceled) self.loading_metadata_deferred.addErrback(self._handle_load_failed) if self.pay_key: self.loading_metadata_deferred.addCallback(lambda _: self._pay_key_fee()) self.loading_metadata_deferred.addCallback(lambda _: self._make_downloader()) self.loading_metadata_deferred.addCallback(lambda _: self.downloader.start()) self.loading_metadata_deferred.addErrback(self._handle_download_error) self.loading_metadata_deferred.addCallback(lambda _: _get_downloader_for_return()) self.loading_metadata_deferred.callback(None) return defer.succeed(None) def _pay_key_fee(self): 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) def _handle_load_canceled(self, err): err.trap(defer.CancelledError) self.finished_deferred.callback(None) def _handle_load_failed(self, err): self.loading_failed = True log.error("An exception occurred attempting to load the stream descriptor: %s", err.getTraceback()) print 'Load Failed: ', err.getTraceback() self.finished_deferred.callback(None) def _handle_metadata(self, metadata): self.metadata = metadata self.factory = self.metadata.factories[0] return defer.succeed(None) def _handle_download_error(self, err): if err.check(InsufficientFundsError): print "Download stopped due to insufficient funds." else: print "Autoaddstream: An unexpected error has caused the download to stop: ", err.getTraceback() def _make_downloader(self): def _set_downloader(downloader): self.downloader = downloader print "Downloading", self.stream_hash, "-->", os.path.join(self.downloader.download_directory, self.downloader.file_name) return self.downloader self.downloader = self.factory.make_downloader(self.metadata, [0.5, True], self.payment_rate_manager) self.downloader.addCallback(_set_downloader) return defer.succeed(self.downloader) class FetcherDaemon(object): def __init__(self, session, lbry_file_manager, lbry_file_metadata_manager, wallet, sd_identifier, autofetcher_conf): 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.rpc_conn = self.wallet.get_rpc_conn_x() self.search = None self.first_run = True self.is_running = False 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.rpc_conn.getblockchaininfo() rtn = [] if self.lastbestblock != c: block = self.rpc_conn.getblock(c['bestblockhash']) txids = block['tx'] transactions = [self.rpc_conn.decoderawtransaction(self.rpc_conn.getrawtransaction(t)) for t in txids] for t in transactions: claims = self.rpc_conn.getclaimsfortx(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) self.seen.append(claim) self.lastbestblock = c if len(rtn): return defer.succeed(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)) download.callback(None) return defer.succeed(None) def _looped_search(self): d = defer.Deferred(None) 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')) 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"]