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fix refreshing peers in the datastore

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Jack Robison 2019-05-17 09:12:00 -04:00
parent 079c81f298
commit 6ecc22f2c7
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4 changed files with 71 additions and 65 deletions
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80
lbrynet/dht/protocol/data_store.py
View file

@ -9,68 +9,62 @@ if typing.TYPE_CHECKING:
class DictDataStore:
def __init__(self, loop: asyncio.BaseEventLoop, peer_manager: 'PeerManager'):
# Dictionary format:
# { <key>: [<contact>, <value>, <lastPublished>, <originallyPublished> <original_publisher_id>] }
self._data_store: typing.Dict[bytes,
typing.List[typing.Tuple['KademliaPeer', bytes, float, float, bytes]]] = {}
self._get_time = loop.time
# { <key>: [(<contact>, <age>), ...] }
self._data_store: typing.Dict[bytes, typing.List[typing.Tuple['KademliaPeer', float]]] = {}
self.loop = loop
self._peer_manager = peer_manager
self.completed_blobs: typing.Set[str] = set()
def filter_bad_and_expired_peers(self, key: bytes) -> typing.List['KademliaPeer']:
def removed_expired_peers(self):
now = self.loop.time()
keys = list(self._data_store.keys())
for key in keys:
to_remove = []
for (peer, ts) in self._data_store[key]:
if ts + constants.data_expiration < now or self._peer_manager.peer_is_good(peer) is False:
to_remove.append((peer, ts))
for item in to_remove:
self._data_store[key].remove(item)
if not self._data_store[key]:
del self._data_store[key]
def filter_bad_and_expired_peers(self, key: bytes) -> typing.Iterator['KademliaPeer']:
"""
Returns only non-expired and unknown/good peers
"""
peers = []
for peer in map(lambda p: p[0],
filter(lambda peer: self._get_time() - peer[3] < constants.data_expiration,
self._data_store[key])):
for peer in self.filter_expired_peers(key):
if self._peer_manager.peer_is_good(peer) is not False:
peers.append(peer)
return peers
yield peer
def filter_expired_peers(self, key: bytes) -> typing.List['KademliaPeer']:
def filter_expired_peers(self, key: bytes) -> typing.Iterator['KademliaPeer']:
"""
Returns only non-expired peers
"""
return list(
map(
lambda p: p[0],
filter(lambda peer: self._get_time() - peer[3] < constants.data_expiration, self._data_store[key])
)
)
def removed_expired_peers(self):
expired_keys = []
for key in self._data_store.keys():
unexpired_peers = self.filter_expired_peers(key)
if not unexpired_peers:
expired_keys.append(key)
else:
self._data_store[key] = [x for x in self._data_store[key] if x[0] in unexpired_peers]
for key in expired_keys:
del self._data_store[key]
now = self.loop.time()
for (peer, ts) in self._data_store.get(key, []):
if ts + constants.data_expiration > now:
yield peer
def has_peers_for_blob(self, key: bytes) -> bool:
return key in self._data_store and len(self.filter_bad_and_expired_peers(key)) > 0
return key in self._data_store
def add_peer_to_blob(self, contact: 'KademliaPeer', key: bytes, compact_address: bytes, last_published: int,
originally_published: int, original_publisher_id: bytes) -> None:
def add_peer_to_blob(self, contact: 'KademliaPeer', key: bytes) -> None:
now = self.loop.time()
if key in self._data_store:
if compact_address not in map(lambda store_tuple: store_tuple[1], self._data_store[key]):
self._data_store[key].append(
(contact, compact_address, last_published, originally_published, original_publisher_id)
)
current = list(filter(lambda x: x[0] == contact, self._data_store[key]))
if len(current):
self._data_store[key][self._data_store[key].index(current[0])] = contact, now
else:
self._data_store[key].append((contact, now))
else:
self._data_store[key] = [(contact, compact_address, last_published, originally_published,
original_publisher_id)]
self._data_store[key] = [(contact, now)]
def get_peers_for_blob(self, key: bytes) -> typing.List['KademliaPeer']:
return [] if key not in self._data_store else [peer for peer in self.filter_bad_and_expired_peers(key)]
return list(self.filter_bad_and_expired_peers(key))
def get_storing_contacts(self) -> typing.List['KademliaPeer']:
peers = set()
for key in self._data_store:
for values in self._data_store[key]:
if values[0] not in peers:
peers.add(values[0])
for key, stored in self._data_store.items():
peers.update(set(map(lambda tup: tup[0], stored)))
return list(peers)

24
lbrynet/dht/protocol/protocol.py
View file

@ -45,19 +45,19 @@ class KademliaRPC:
def ping():
return b'pong'
def store(self, rpc_contact: 'KademliaPeer', blob_hash: bytes, token: bytes, port: int,
original_publisher_id: bytes, age: int) -> bytes:
if original_publisher_id is None:
original_publisher_id = rpc_contact.node_id
def store(self, rpc_contact: 'KademliaPeer', blob_hash: bytes, token: bytes, port: int) -> bytes:
if len(blob_hash) != constants.hash_bits // 8:
raise ValueError(f"invalid length of blob hash: {len(blob_hash)}")
if not 0 < port < 65535:
raise ValueError(f"invalid tcp port: {port}")
rpc_contact.update_tcp_port(port)
if self.loop.time() - self.protocol.started_listening_time < constants.token_secret_refresh_interval:
pass
elif not self.verify_token(token, rpc_contact.compact_ip()):
raise ValueError("Invalid token")
now = int(self.loop.time())
originally_published = now - age
if not self.verify_token(token, rpc_contact.compact_ip()):
if self.loop.time() - self.protocol.started_listening_time < constants.token_secret_refresh_interval:
pass
else:
raise ValueError("Invalid token")
self.protocol.data_store.add_peer_to_blob(
rpc_contact, blob_hash, rpc_contact.compact_address_tcp(), now, originally_published, original_publisher_id
rpc_contact, blob_hash
)
return b'OK'
@ -416,7 +416,7 @@ class KademliaProtocol(DatagramProtocol):
result = self.node_rpc.ping()
elif method == b'store':
blob_hash, token, port, original_publisher_id, age = a
result = self.node_rpc.store(sender_contact, blob_hash, token, port, original_publisher_id, age)
result = self.node_rpc.store(sender_contact, blob_hash, token, port)
elif method == b'findNode':
key, = a
result = self.node_rpc.find_node(sender_contact, key)

30
tests/unit/dht/protocol/test_data_store.py
View file

@ -16,10 +16,22 @@ class DataStoreTests(TestCase):
peer = self.peer_manager.get_kademlia_peer(node_id, address, udp_port)
peer.update_tcp_port(tcp_port)
before = self.data_store.get_peers_for_blob(blob)
self.data_store.add_peer_to_blob(peer, blob, peer.compact_address_tcp(), 0, 0, peer.node_id)
self.data_store.add_peer_to_blob(peer, blob)
self.assertListEqual(before + [peer], self.data_store.get_peers_for_blob(blob))
return peer
def test_refresh_peer_to_blob(self):
blob = b'f' * 48
self.assertListEqual([], self.data_store.get_peers_for_blob(blob))
peer = self._test_add_peer_to_blob(blob=blob, node_id=b'a' * 48, address='1.2.3.4')
self.assertTrue(self.data_store.has_peers_for_blob(blob))
self.assertEqual(len(self.data_store.get_peers_for_blob(blob)), 1)
self.assertEqual(self.data_store._data_store[blob][0][1], 0)
self.loop.time = lambda: 100.0
self.assertEqual(self.data_store._data_store[blob][0][1], 0)
self.data_store.add_peer_to_blob(peer, blob)
self.assertEqual(self.data_store._data_store[blob][0][1], 100)
def test_add_peer_to_blob(self, blob=b'f' * 48, peers=None):
peers = peers or [
(b'a' * 48, '1.2.3.4'),
@ -67,8 +79,8 @@ class DataStoreTests(TestCase):
self.assertEqual(len(self.data_store.get_storing_contacts()), len(peers))
# expire the first peer from blob1
first = self.data_store._data_store[blob1][0]
self.data_store._data_store[blob1][0] = (first[0], first[1], first[2], -86401, first[4])
first = self.data_store._data_store[blob1][0][0]
self.data_store._data_store[blob1][0] = (first, -86401)
self.assertEqual(len(self.data_store.get_storing_contacts()), len(peers))
self.data_store.removed_expired_peers()
self.assertEqual(len(self.data_store.get_peers_for_blob(blob1)), len(peers) - 1)
@ -76,18 +88,18 @@ class DataStoreTests(TestCase):
self.assertEqual(len(self.data_store.get_storing_contacts()), len(peers))
# expire the first peer from blob2
first = self.data_store._data_store[blob2][0]
self.data_store._data_store[blob2][0] = (first[0], first[1], first[2], -86401, first[4])
first = self.data_store._data_store[blob2][0][0]
self.data_store._data_store[blob2][0] = (first, -86401)
self.data_store.removed_expired_peers()
self.assertEqual(len(self.data_store.get_peers_for_blob(blob1)), len(peers) - 1)
self.assertEqual(len(self.data_store.get_peers_for_blob(blob2)), len(peers) - 1)
self.assertEqual(len(self.data_store.get_storing_contacts()), len(peers) - 1)
# expire the second and third peers from blob1
first = self.data_store._data_store[blob2][0]
self.data_store._data_store[blob1][0] = (first[0], first[1], first[2], -86401, first[4])
second = self.data_store._data_store[blob2][1]
self.data_store._data_store[blob1][1] = (second[0], second[1], second[2], -86401, second[4])
first = self.data_store._data_store[blob2][0][0]
self.data_store._data_store[blob1][0] = (first, -86401)
second = self.data_store._data_store[blob2][1][0]
self.data_store._data_store[blob1][1] = (second, -86401)
self.data_store.removed_expired_peers()
self.assertEqual(len(self.data_store.get_peers_for_blob(blob1)), 0)
self.assertEqual(len(self.data_store.get_peers_for_blob(blob2)), len(peers) - 1)

2
tests/unit/stream/test_managed_stream.py
View file

@ -72,7 +72,7 @@ class TestManagedStream(BlobExchangeTestBase):
self.assertTrue(self.stream._running.is_set())
await asyncio.sleep(0.5, loop=self.loop)
self.assertTrue(self.stream._running.is_set())
await asyncio.sleep(0.6, loop=self.loop)
await asyncio.sleep(2, loop=self.loop)
self.assertEqual(self.stream.status, "finished")
self.assertFalse(self.stream._running.is_set())