Madiator2011/lbry-sdk
1
0
Fork 0
forked from LBRYCommunity/lbry-sdk
Code Pull requests Activity

Merge pull request #1857 from lbryio/handle-invalid-data-and-fix-cancel-blob-request

Browse source 
Handle invalid data and fix cancel blob request
This commit is contained in:
Jack Robison 2019-02-04 16:47:35 -05:00 committed by GitHub
parent ad30b7df6d 8883587cc7
commit e141cc9e22
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 28 additions and 25 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
lbrynet/blob_exchange/client.py
View file

@ -2,6 +2,7 @@ import asyncio
import logging
import typing
import binascii
from lbrynet.error import InvalidBlobHashError, InvalidDataError
from lbrynet.blob_exchange.serialization import BlobResponse, BlobRequest
if typing.TYPE_CHECKING:
from lbrynet.blob.blob_file import BlobFile
@ -104,13 +105,16 @@ class BlobExchangeClientProtocol(asyncio.Protocol):
log.debug(msg)
msg = f"downloaded {self.blob.blob_hash[:8]} from {self.peer_address}:{self.peer_port}"
await asyncio.wait_for(self.writer.finished, self.peer_timeout, loop=self.loop)
await self.blob.finished_writing.wait()
log.info(msg)
await self.blob.finished_writing.wait()
return True, True
except asyncio.CancelledError:
return False, True
except asyncio.TimeoutError:
return False, False
except (InvalidBlobHashError, InvalidDataError):
log.warning("invalid blob from %s:%i", self.peer_address, self.peer_port)
return False, False
finally:
await self.close()

47
lbrynet/blob_exchange/downloader.py
View file

@ -29,28 +29,22 @@ class BlobDownloader:
self.ignored: typing.Set['KademliaPeer'] = set()
self.scores: typing.Dict['KademliaPeer', int] = {}
def request_blob_from_peer(self, blob: 'BlobFile', peer: 'KademliaPeer'):
async def _request_blob():
if blob.get_is_verified():
return
try:
success, keep_connection = await request_blob(
self.loop, blob, peer.address, peer.tcp_port, self.config.peer_connect_timeout,
self.config.blob_download_timeout
)
finally:
if peer in self.active_connections:
self.active_connections.pop(peer)
if not keep_connection and peer not in self.ignored:
self.ignored.add(peer)
log.debug("drop peer %s:%i", peer.address, peer.tcp_port)
elif keep_connection:
log.debug("keep peer %s:%i", peer.address, peer.tcp_port)
if success:
self.scores[peer] = self.scores.get(peer, 0) + 2
else:
self.scores[peer] = self.scores.get(peer, 0) - 1
return self.loop.create_task(_request_blob())
async def request_blob_from_peer(self, blob: 'BlobFile', peer: 'KademliaPeer'):
if blob.get_is_verified():
return
success, keep_connection = await request_blob(
self.loop, blob, peer.address, peer.tcp_port, self.config.peer_connect_timeout,
self.config.blob_download_timeout
)
if not keep_connection and peer not in self.ignored:
self.ignored.add(peer)
log.debug("drop peer %s:%i", peer.address, peer.tcp_port)
elif keep_connection:
log.debug("keep peer %s:%i", peer.address, peer.tcp_port)
if success:
self.scores[peer] = self.scores.get(peer, 0) + 2
else:
self.scores[peer] = self.scores.get(peer, 0) - 1
async def new_peer_or_finished(self, blob: 'BlobFile'):
async def get_and_re_add_peers():
@ -77,7 +71,12 @@ class BlobDownloader:
break
if peer not in self.active_connections and peer not in self.ignored:
log.debug("request %s from %s:%i", blob_hash[:8], peer.address, peer.tcp_port)
self.active_connections[peer] = self.request_blob_from_peer(blob, peer)
t = self.loop.create_task(self.request_blob_from_peer(blob, peer))
self.active_connections[peer] = t
t.add_done_callback(
lambda _:
None if peer not in self.active_connections else self.active_connections.pop(peer)
)
await self.new_peer_or_finished(blob)
to_re_add = list(set(filter(lambda peer: peer not in self.ignored, batch)))
to_re_add.sort(key=lambda peer: self.scores.get(peer, 0), reverse=True)
@ -88,7 +87,7 @@ class BlobDownloader:
if task and not task.done():
task.cancel()
await blob.close()
log.info("downloaded %s", blob_hash[:8])
log.debug("downloaded %s", blob_hash[:8])
return blob
except asyncio.CancelledError:
while self.active_connections: