lbry-sdk/lbrynet/lbry_file/client/EncryptedFileDownloader.py

201 lines
7.7 KiB
Python
Raw Normal View History

2015-08-20 17:27:15 +02:00
import binascii
from zope.interface import implements
from lbrynet.core.StreamDescriptor import save_sd_info
2015-08-20 17:27:15 +02:00
from lbrynet.cryptstream.client.CryptStreamDownloader import CryptStreamDownloader
from lbrynet.core.client.StreamProgressManager import FullStreamProgressManager
from lbrynet.interfaces import IStreamDownloaderFactory
from lbrynet.lbry_file.client.EncryptedFileMetadataHandler import EncryptedFileMetadataHandler
2015-08-20 17:27:15 +02:00
import os
2017-09-14 21:23:45 +02:00
from twisted.internet import defer, threads
import logging
import traceback
log = logging.getLogger(__name__)
2015-08-20 17:27:15 +02:00
2016-09-27 20:18:16 +02:00
class EncryptedFileDownloader(CryptStreamDownloader):
2015-08-20 17:27:15 +02:00
"""Classes which inherit from this class download LBRY files"""
def __init__(self, stream_hash, peer_finder, rate_limiter, blob_manager,
storage, payment_rate_manager, wallet, key, stream_name, file_name):
2015-08-20 17:27:15 +02:00
CryptStreamDownloader.__init__(self, peer_finder, rate_limiter, blob_manager,
payment_rate_manager, wallet, key, stream_name)
2015-08-20 17:27:15 +02:00
self.stream_hash = stream_hash
self.storage = storage
self.file_name = binascii.unhexlify(os.path.basename(file_name))
2015-08-20 17:27:15 +02:00
self._calculated_total_bytes = None
@defer.inlineCallbacks
def delete_data(self):
crypt_infos = yield self.storage.get_blobs_for_stream(self.stream_hash)
blob_hashes = [b.blob_hash for b in crypt_infos if b.blob_hash]
sd_hash = yield self.storage.get_sd_blob_hash_for_stream(self.stream_hash)
blob_hashes.append(sd_hash)
yield self.blob_manager.delete_blobs(blob_hashes)
def stop(self, err=None):
2015-08-20 17:27:15 +02:00
d = self._close_output()
d.addCallback(lambda _: CryptStreamDownloader.stop(self, err=err))
2015-08-20 17:27:15 +02:00
return d
def _get_progress_manager(self, download_manager):
2016-11-30 21:20:45 +01:00
return FullStreamProgressManager(self._finished_downloading,
self.blob_manager, download_manager)
2015-08-20 17:27:15 +02:00
def _start(self):
d = self._setup_output()
d.addCallback(lambda _: CryptStreamDownloader._start(self))
return d
def _setup_output(self):
pass
def _close_output(self):
pass
def get_total_bytes(self):
d = self.storage.get_blobs_for_stream(self.stream_hash)
def calculate_size(blobs):
return sum([b.length for b in blobs])
d.addCallback(calculate_size)
return d
def get_total_bytes_cached(self):
2015-08-20 17:27:15 +02:00
if self._calculated_total_bytes is None or self._calculated_total_bytes == 0:
if self.download_manager is None:
return 0
else:
self._calculated_total_bytes = self.download_manager.calculate_total_bytes()
return self._calculated_total_bytes
def get_bytes_left_to_output(self):
if self.download_manager is not None:
return self.download_manager.calculate_bytes_left_to_output()
else:
return 0
def get_bytes_left_to_download(self):
if self.download_manager is not None:
return self.download_manager.calculate_bytes_left_to_download()
else:
return 0
def _get_metadata_handler(self, download_manager):
2016-11-30 21:20:45 +01:00
return EncryptedFileMetadataHandler(self.stream_hash,
self.storage, download_manager)
2015-08-20 17:27:15 +02:00
2016-09-27 20:18:16 +02:00
class EncryptedFileDownloaderFactory(object):
2015-08-20 17:27:15 +02:00
implements(IStreamDownloaderFactory)
def __init__(self, peer_finder, rate_limiter, blob_manager, storage, wallet):
2015-08-20 17:27:15 +02:00
self.peer_finder = peer_finder
self.rate_limiter = rate_limiter
self.blob_manager = blob_manager
self.storage = storage
2015-08-20 17:27:15 +02:00
self.wallet = wallet
def can_download(self, sd_validator):
return True
2015-08-20 17:27:15 +02:00
2017-02-14 20:18:42 +01:00
def make_downloader(self, metadata, options, payment_rate_manager, **kwargs):
assert len(options) == 1
data_rate = options[0]
2017-02-14 18:32:04 +01:00
payment_rate_manager.min_blob_data_payment_rate = data_rate
2015-08-20 17:27:15 +02:00
def save_source_if_blob(stream_hash):
return defer.succeed(metadata.source_blob_hash)
2015-08-20 17:27:15 +02:00
def create_downloader(stream_hash):
downloader = self._make_downloader(stream_hash, payment_rate_manager,
metadata.validator.raw_info)
return defer.succeed(downloader)
2015-08-20 17:27:15 +02:00
d = save_sd_info(self.blob_manager, metadata.source_blob_hash, metadata.validator.raw_info)
d.addCallback(save_source_if_blob)
2015-08-20 17:27:15 +02:00
d.addCallback(create_downloader)
return d
def _make_downloader(self, stream_hash, payment_rate_manager, stream_info):
2015-08-20 17:27:15 +02:00
pass
2016-09-27 20:18:16 +02:00
class EncryptedFileSaver(EncryptedFileDownloader):
def __init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, storage, payment_rate_manager, wallet,
download_directory, key, stream_name, file_name):
EncryptedFileDownloader.__init__(self, stream_hash, peer_finder, rate_limiter,
blob_manager, storage, payment_rate_manager,
wallet, key, stream_name, file_name)
self.download_directory = binascii.unhexlify(download_directory)
self.file_written_to = os.path.join(self.download_directory, binascii.unhexlify(file_name))
2015-08-20 17:27:15 +02:00
self.file_handle = None
def __str__(self):
return str(self.file_written_to)
def stop(self, err=None):
2016-09-27 20:18:16 +02:00
d = EncryptedFileDownloader.stop(self, err=err)
2015-08-20 17:27:15 +02:00
return d
def _get_progress_manager(self, download_manager):
2016-11-30 21:20:45 +01:00
return FullStreamProgressManager(self._finished_downloading,
self.blob_manager,
download_manager)
2015-08-20 17:27:15 +02:00
def _setup_output(self):
def open_file():
if self.file_handle is None:
file_written_to = os.path.join(self.download_directory, self.file_name)
try:
self.file_handle = open(file_written_to, 'wb')
self.file_written_to = file_written_to
except IOError:
log.error(traceback.format_exc())
2016-11-30 21:20:45 +01:00
raise ValueError(
"Failed to open %s. Make sure you have permission to save files to that"
" location." % file_written_to
)
2015-08-20 17:27:15 +02:00
return threads.deferToThread(open_file)
def _close_output(self):
self.file_handle, file_handle = None, self.file_handle
def close_file():
if file_handle is not None:
name = file_handle.name
file_handle.close()
if self.completed is False:
os.remove(name)
return threads.deferToThread(close_file)
def _get_write_func(self):
def write_func(data):
if self.stopped is False and self.file_handle is not None:
self.file_handle.write(data)
return write_func
2016-09-27 20:18:16 +02:00
class EncryptedFileSaverFactory(EncryptedFileDownloaderFactory):
def __init__(self, peer_finder, rate_limiter, blob_manager, storage, wallet, download_directory):
EncryptedFileDownloaderFactory.__init__(self, peer_finder, rate_limiter, blob_manager, storage, wallet)
self.download_directory = binascii.hexlify(download_directory)
2015-08-20 17:27:15 +02:00
def _make_downloader(self, stream_hash, payment_rate_manager, stream_info):
2018-01-05 03:28:09 +01:00
stream_name = stream_info.raw_info['stream_name']
key = stream_info.raw_info['key']
2018-01-05 03:28:09 +01:00
suggested_file_name = stream_info.raw_info['suggested_file_name']
return EncryptedFileSaver(
stream_hash, self.peer_finder, self.rate_limiter, self.blob_manager, self.storage, payment_rate_manager,
self.wallet, self.download_directory, key=key, stream_name=stream_name, file_name=suggested_file_name
)
2015-08-20 17:27:15 +02:00
@staticmethod
def get_description():
2015-08-20 17:27:15 +02:00
return "Save"