lbry-sdk/lbrynet/lbry_file/client/EncryptedFileMetadataHandler.py
Lex Berezhny 5520d518b5
DHT py3 compatibility, mostly commenting out implements() and fixing imports
cryptstream py3 support, mostly commenting out implements()
lbry_file py3 support, mostly commenting out implements()
file_manager py3 support, mostly commenting out implements()
core py3 support, mostly commenting out implements() and fixing imports
2018-08-24 11:37:25 -04:00

43 lines
1.5 KiB
Python

import logging
from zope.interface import implements
from twisted.internet import defer
from lbrynet.interfaces import IMetadataHandler
log = logging.getLogger(__name__)
class EncryptedFileMetadataHandler(object):
#implements(IMetadataHandler)
def __init__(self, stream_hash, storage, download_manager):
self.stream_hash = stream_hash
self.storage = storage
self.download_manager = download_manager
self._final_blob_num = None
######### IMetadataHandler #########
@defer.inlineCallbacks
def get_initial_blobs(self):
blob_infos = yield self.storage.get_blobs_for_stream(self.stream_hash)
formatted_infos = self._format_initial_blobs_for_download_manager(blob_infos)
defer.returnValue(formatted_infos)
def final_blob_num(self):
return self._final_blob_num
######### internal calls #########
def _format_initial_blobs_for_download_manager(self, blob_infos):
infos = []
for i, crypt_blob in enumerate(blob_infos):
if crypt_blob.blob_hash is not None and crypt_blob.length:
infos.append(crypt_blob)
else:
if i != len(blob_infos) - 1:
raise Exception("Invalid stream terminator: %i of %i" %
(i, len(blob_infos) - 1))
log.debug("Setting _final_blob_num to %s", str(crypt_blob.blob_num - 1))
self._final_blob_num = crypt_blob.blob_num - 1
return infos