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.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.data_rate = data_rate
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[1]
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
downloader = self.factory.make_downloader(self.metadata, [self.data_rate, True], self.payment_rate_manager)
downloader.addCallback(_set_downloader)
return 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'))
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"]