forked from LBRYCommunity/lbry-sdk
242 lines
10 KiB
Python
242 lines
10 KiB
Python
import json
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import logging
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import os
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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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log = logging.getLogger(__name__)
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class GetStream(object):
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def __init__(self, sd_identifier, session, wallet, lbry_file_manager, max_key_fee, pay_key=True, data_rate=0.5):
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self.finished_deferred = defer.Deferred(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.name = None
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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.loading_metadata_deferred = defer.Deferred()
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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.metadata = None
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self.loading_failed = False
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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.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.downloader = None
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self.data_rate = data_rate
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self.pay_key = pay_key
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def start(self, stream_info):
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self.stream_info = stream_info
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if 'stream_hash' in self.stream_info.keys():
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self.description = self.stream_info['description']
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if 'key_fee' in self.stream_info.keys():
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self.key_fee = float(self.stream_info['key_fee'])
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if 'key_fee_address' in self.stream_info.keys():
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self.key_fee_address = self.stream_info['key_fee_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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self.stream_hash = self.stream_info['stream_hash']
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elif 'stream_hash' in json.loads(self.stream_info['value']):
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self.resolved_name = self.stream_info.get('name', None)
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self.description = json.loads(self.stream_info['value']).get('description', None)
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try:
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if 'key_fee' in json.loads(self.stream_info['value']):
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self.key_fee = float(json.loads(self.stream_info['value'])['key_fee'])
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except ValueError:
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self.key_fee = None
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self.key_fee_address = json.loads(self.stream_info['value']).get('key_fee_address', None)
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self.stream_hash = json.loads(self.stream_info['value'])['stream_hash']
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else:
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print 'InvalidStreamInfoError'
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raise InvalidStreamInfoError(self.stream_info)
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if self.key_fee > self.max_key_fee:
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if self.pay_key:
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print "Key fee (" + str(self.key_fee) + ") above limit of " + str(
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self.max_key_fee) + ", didn't download lbry://" + str(self.resolved_name)
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return self.finished_deferred.callback(None)
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else:
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pass
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def _get_downloader_for_return():
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return defer.succeed(self.downloader)
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self.loading_metadata_deferred = defer.Deferred(None)
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self.loading_metadata_deferred.addCallback(
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lambda _: download_sd_blob(self.session, self.stream_hash, self.payment_rate_manager))
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self.loading_metadata_deferred.addCallback(self.sd_identifier.get_metadata_for_sd_blob)
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self.loading_metadata_deferred.addCallback(self._handle_metadata)
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self.loading_metadata_deferred.addErrback(self._handle_load_canceled)
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self.loading_metadata_deferred.addErrback(self._handle_load_failed)
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if self.pay_key:
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self.loading_metadata_deferred.addCallback(lambda _: self._pay_key_fee())
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self.loading_metadata_deferred.addCallback(lambda _: self._make_downloader())
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self.loading_metadata_deferred.addCallback(lambda _: self.downloader.start())
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self.loading_metadata_deferred.addErrback(self._handle_download_error)
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self.loading_metadata_deferred.addCallback(lambda _: _get_downloader_for_return())
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self.loading_metadata_deferred.callback(None)
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return defer.succeed(None)
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def _pay_key_fee(self):
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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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print 'Key fee: ' + str(self.key_fee) + ' | ' + str(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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def _handle_load_canceled(self, err):
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err.trap(defer.CancelledError)
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self.finished_deferred.callback(None)
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def _handle_load_failed(self, err):
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self.loading_failed = True
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log.error("An exception occurred attempting to load the stream descriptor: %s", err.getTraceback())
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print 'Load Failed: ', err.getTraceback()
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self.finished_deferred.callback(None)
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def _handle_metadata(self, metadata):
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self.metadata = metadata
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self.factory = self.metadata.factories[0]
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return defer.succeed(None)
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def _handle_download_error(self, err):
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if err.check(InsufficientFundsError):
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print "Download stopped due to insufficient funds."
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else:
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print "Autoaddstream: An unexpected error has caused the download to stop: ", err.getTraceback()
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def _make_downloader(self):
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def _set_downloader(downloader):
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self.downloader = downloader
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print "Downloading", self.stream_hash, "-->", os.path.join(self.downloader.download_directory,
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self.downloader.file_name)
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return self.downloader
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self.downloader = self.factory.make_downloader(self.metadata, [self.data_rate, True], self.payment_rate_manager)
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self.downloader.addCallback(_set_downloader)
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return defer.succeed(self.downloader)
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class FetcherDaemon(object):
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def __init__(self, session, lbry_file_manager, lbry_file_metadata_manager, wallet, sd_identifier, autofetcher_conf):
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self.autofetcher_conf = autofetcher_conf
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self.max_key_fee = 0.0
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self.sd_identifier = sd_identifier
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self.wallet = wallet
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self.session = session
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self.lbry_file_manager = lbry_file_manager
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self.lbry_metadata_manager = lbry_file_metadata_manager
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self.seen = []
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self.lastbestblock = None
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self.rpc_conn = self.wallet.get_rpc_conn_x()
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self.search = None
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self.first_run = True
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self.is_running = False
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self._get_autofetcher_conf()
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def start(self):
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if not self.is_running:
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self.is_running = True
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self.search = LoopingCall(self._looped_search)
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self.search.start(1)
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else:
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print "Autofetcher is already running"
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def stop(self):
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if self.is_running:
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self.search.stop()
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self.is_running = False
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else:
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print "Autofetcher isn't running, there's nothing to stop"
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def check_if_running(self):
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if self.is_running:
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msg = "Autofetcher is running\n"
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msg += "Last block hash: " + str(self.lastbestblock['bestblockhash'])
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else:
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msg = "Autofetcher is not running"
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return msg
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def _get_names(self):
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c = self.rpc_conn.getblockchaininfo()
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rtn = []
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if self.lastbestblock != c:
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block = self.rpc_conn.getblock(c['bestblockhash'])
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txids = block['tx']
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transactions = [self.rpc_conn.decoderawtransaction(self.rpc_conn.getrawtransaction(t)) for t in txids]
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for t in transactions:
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claims = self.rpc_conn.getclaimsfortx(t['txid'])
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# if self.first_run:
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# # claims = self.rpc_conn.getclaimsfortx("96aca2c60efded5806b7336430c5987b9092ffbea9c6ed444e3bf8e008993e11")
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# # claims = self.rpc_conn.getclaimsfortx("cc9c7f5225ecb38877e6ca7574d110b23214ac3556b9d65784065ad3a85b4f74")
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# self.first_run = False
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if claims:
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for claim in claims:
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if claim not in self.seen:
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msg = "[" + str(datetime.now()) + "] New claim | lbry://" + str(claim['name']) + \
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" | stream hash: " + str(json.loads(claim['value'])['stream_hash'])
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print msg
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log.debug(msg)
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rtn.append(claim)
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self.seen.append(claim)
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self.lastbestblock = c
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if len(rtn):
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return defer.succeed(rtn)
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def _download_claims(self, claims):
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if claims:
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for claim in claims:
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download = defer.Deferred()
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stream = GetStream(self.sd_identifier, self.session, self.wallet, self.lbry_file_manager,
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self.max_key_fee, pay_key=False)
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download.addCallback(lambda _: stream.start(claim))
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download.callback(None)
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return defer.succeed(None)
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def _looped_search(self):
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d = defer.Deferred(None)
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d.addCallback(lambda _: self._get_names())
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d.addCallback(self._download_claims)
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d.callback(None)
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def _get_autofetcher_conf(self):
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settings = {"maxkey": "0.0"}
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if os.path.exists(self.autofetcher_conf):
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conf = open(self.autofetcher_conf)
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for l in conf:
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if l.startswith("maxkey="):
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settings["maxkey"] = float(l[7:].rstrip('\n'))
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print "Autofetcher using max key price of", settings["maxkey"], ", to start call start_fetcher()"
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else:
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print "Autofetcher using default max key price of 0.0"
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print "To change this create the file:"
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print str(self.autofetcher_conf)
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print "Example contents of conf file:"
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print "maxkey=1.0"
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self.max_key_fee = settings["maxkey"]
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