update kadmelia lib
This commit is contained in:
Christophe de Carvalho Pereira Martins
Christophe de Carvalho
parent
57077cd3b4
commit
c24a279d2d
|
|
@ -2,4 +2,4 @@
|
|||
Kademlia is a Python implementation of the Kademlia protocol which
|
||||
utilizes the asyncio library.
|
||||
"""
|
||||
__version__ = "1.1"
|
||||
__version__ = "2.0"
|
||||
|
|
|
|||
|
|
@ -1,16 +1,19 @@
|
|||
from collections import Counter
|
||||
import logging
|
||||
|
||||
from .kademlia.node import Node, NodeHeap
|
||||
from .kademlia.utils import gather_dict
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
from .node import Node, NodeHeap
|
||||
from .utils import gather_dict
|
||||
|
||||
|
||||
log = logging.getLogger(__name__) # pylint: disable=invalid-name
|
||||
|
||||
|
||||
# pylint: disable=too-few-public-methods
|
||||
class SpiderCrawl:
|
||||
"""
|
||||
Crawl the network and look for given 160-bit keys.
|
||||
"""
|
||||
|
||||
def __init__(self, protocol, node, peers, ksize, alpha):
|
||||
"""
|
||||
Create a new C{SpiderCrawl}er.
|
||||
|
|
@ -29,7 +32,7 @@ class SpiderCrawl:
|
|||
self.alpha = alpha
|
||||
self.node = node
|
||||
self.nearest = NodeHeap(self.node, self.ksize)
|
||||
self.lastIDsCrawled = []
|
||||
self.last_ids_crawled = []
|
||||
log.info("creating spider with peers: %s", peers)
|
||||
self.nearest.push(peers)
|
||||
|
||||
|
|
@ -38,7 +41,7 @@ class SpiderCrawl:
|
|||
Get either a value or list of nodes.
|
||||
|
||||
Args:
|
||||
rpcmethod: The protocol's callfindValue or callFindNode.
|
||||
rpcmethod: The protocol's callfindValue or call_find_node.
|
||||
|
||||
The process:
|
||||
1. calls find_* to current ALPHA nearest not already queried nodes,
|
||||
|
|
@ -51,18 +54,18 @@ class SpiderCrawl:
|
|||
"""
|
||||
log.info("crawling network with nearest: %s", str(tuple(self.nearest)))
|
||||
count = self.alpha
|
||||
if self.nearest.getIDs() == self.lastIDsCrawled:
|
||||
if self.nearest.get_ids() == self.last_ids_crawled:
|
||||
count = len(self.nearest)
|
||||
self.lastIDsCrawled = self.nearest.getIDs()
|
||||
self.last_ids_crawled = self.nearest.get_ids()
|
||||
|
||||
ds = {}
|
||||
for peer in self.nearest.getUncontacted()[:count]:
|
||||
ds[peer.id] = rpcmethod(peer, self.node)
|
||||
self.nearest.markContacted(peer)
|
||||
found = await gather_dict(ds)
|
||||
return await self._nodesFound(found)
|
||||
dicts = {}
|
||||
for peer in self.nearest.get_uncontacted()[:count]:
|
||||
dicts[peer.id] = rpcmethod(peer, self.node)
|
||||
self.nearest.mark_contacted(peer)
|
||||
found = await gather_dict(dicts)
|
||||
return await self._nodes_found(found)
|
||||
|
||||
async def _nodesFound(self, responses):
|
||||
async def _nodes_found(self, responses):
|
||||
raise NotImplementedError
|
||||
|
||||
|
||||
|
|
@ -71,55 +74,55 @@ class ValueSpiderCrawl(SpiderCrawl):
|
|||
SpiderCrawl.__init__(self, protocol, node, peers, ksize, alpha)
|
||||
# keep track of the single nearest node without value - per
|
||||
# section 2.3 so we can set the key there if found
|
||||
self.nearestWithoutValue = NodeHeap(self.node, 1)
|
||||
self.nearest_without_value = NodeHeap(self.node, 1)
|
||||
|
||||
async def find(self):
|
||||
"""
|
||||
Find either the closest nodes or the value requested.
|
||||
"""
|
||||
return await self._find(self.protocol.callFindValue)
|
||||
return await self._find(self.protocol.call_find_value)
|
||||
|
||||
async def _nodesFound(self, responses):
|
||||
async def _nodes_found(self, responses):
|
||||
"""
|
||||
Handle the result of an iteration in _find.
|
||||
"""
|
||||
toremove = []
|
||||
foundValues = []
|
||||
found_values = []
|
||||
for peerid, response in responses.items():
|
||||
response = RPCFindResponse(response)
|
||||
if not response.happened():
|
||||
toremove.append(peerid)
|
||||
elif response.hasValue():
|
||||
foundValues.append(response.getValue())
|
||||
elif response.has_value():
|
||||
found_values.append(response.get_value())
|
||||
else:
|
||||
peer = self.nearest.getNodeById(peerid)
|
||||
self.nearestWithoutValue.push(peer)
|
||||
self.nearest.push(response.getNodeList())
|
||||
peer = self.nearest.get_node(peerid)
|
||||
self.nearest_without_value.push(peer)
|
||||
self.nearest.push(response.get_node_list())
|
||||
self.nearest.remove(toremove)
|
||||
|
||||
if len(foundValues) > 0:
|
||||
return await self._handleFoundValues(foundValues)
|
||||
if self.nearest.allBeenContacted():
|
||||
if found_values:
|
||||
return await self._handle_found_values(found_values)
|
||||
if self.nearest.have_contacted_all():
|
||||
# not found!
|
||||
return None
|
||||
return await self.find()
|
||||
|
||||
async def _handleFoundValues(self, values):
|
||||
async def _handle_found_values(self, values):
|
||||
"""
|
||||
We got some values! Exciting. But let's make sure
|
||||
they're all the same or freak out a little bit. Also,
|
||||
make sure we tell the nearest node that *didn't* have
|
||||
the value to store it.
|
||||
"""
|
||||
valueCounts = Counter(values)
|
||||
if len(valueCounts) != 1:
|
||||
value_counts = Counter(values)
|
||||
if len(value_counts) != 1:
|
||||
log.warning("Got multiple values for key %i: %s",
|
||||
self.node.long_id, str(values))
|
||||
value = valueCounts.most_common(1)[0][0]
|
||||
value = value_counts.most_common(1)[0][0]
|
||||
|
||||
peerToSaveTo = self.nearestWithoutValue.popleft()
|
||||
if peerToSaveTo is not None:
|
||||
await self.protocol.callStore(peerToSaveTo, self.node.id, value)
|
||||
peer = self.nearest_without_value.popleft()
|
||||
if peer:
|
||||
await self.protocol.call_store(peer, self.node.id, value)
|
||||
return value
|
||||
|
||||
|
||||
|
|
@ -128,9 +131,9 @@ class NodeSpiderCrawl(SpiderCrawl):
|
|||
"""
|
||||
Find the closest nodes.
|
||||
"""
|
||||
return await self._find(self.protocol.callFindNode)
|
||||
return await self._find(self.protocol.call_find_node)
|
||||
|
||||
async def _nodesFound(self, responses):
|
||||
async def _nodes_found(self, responses):
|
||||
"""
|
||||
Handle the result of an iteration in _find.
|
||||
"""
|
||||
|
|
@ -140,10 +143,10 @@ class NodeSpiderCrawl(SpiderCrawl):
|
|||
if not response.happened():
|
||||
toremove.append(peerid)
|
||||
else:
|
||||
self.nearest.push(response.getNodeList())
|
||||
self.nearest.push(response.get_node_list())
|
||||
self.nearest.remove(toremove)
|
||||
|
||||
if self.nearest.allBeenContacted():
|
||||
if self.nearest.have_contacted_all():
|
||||
return list(self.nearest)
|
||||
return await self.find()
|
||||
|
||||
|
|
@ -166,13 +169,13 @@ class RPCFindResponse:
|
|||
"""
|
||||
return self.response[0]
|
||||
|
||||
def hasValue(self):
|
||||
def has_value(self):
|
||||
return isinstance(self.response[1], dict)
|
||||
|
||||
def getValue(self):
|
||||
def get_value(self):
|
||||
return self.response[1]['value']
|
||||
|
||||
def getNodeList(self):
|
||||
def get_node_list(self):
|
||||
"""
|
||||
Get the node list in the response. If there's no value, this should
|
||||
be set.
|
||||
|
|
|
|||
|
|
@ -6,16 +6,17 @@ import pickle
|
|||
import asyncio
|
||||
import logging
|
||||
|
||||
from .kademlia.protocol import KademliaProtocol
|
||||
from .kademlia.utils import digest
|
||||
from .kademlia.storage import ForgetfulStorage
|
||||
from .kademlia.node import Node
|
||||
from .kademlia.crawling import ValueSpiderCrawl
|
||||
from .kademlia.crawling import NodeSpiderCrawl
|
||||
from .protocol import KademliaProtocol
|
||||
from .utils import digest
|
||||
from .storage import ForgetfulStorage
|
||||
from .node import Node
|
||||
from .crawling import ValueSpiderCrawl
|
||||
from .crawling import NodeSpiderCrawl
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
log = logging.getLogger(__name__) # pylint: disable=invalid-name
|
||||
|
||||
|
||||
# pylint: disable=too-many-instance-attributes
|
||||
class Server:
|
||||
"""
|
||||
High level view of a node instance. This is the object that should be
|
||||
|
|
@ -57,7 +58,7 @@ class Server:
|
|||
def _create_protocol(self):
|
||||
return self.protocol_class(self.node, self.storage, self.ksize)
|
||||
|
||||
def listen(self, port, interface='0.0.0.0'):
|
||||
async def listen(self, port, interface='0.0.0.0'):
|
||||
"""
|
||||
Start listening on the given port.
|
||||
|
||||
|
|
@ -68,7 +69,7 @@ class Server:
|
|||
local_addr=(interface, port))
|
||||
log.info("Node %i listening on %s:%i",
|
||||
self.node.long_id, interface, port)
|
||||
self.transport, self.protocol = loop.run_until_complete(listen)
|
||||
self.transport, self.protocol = await listen
|
||||
# finally, schedule refreshing table
|
||||
self.refresh_table()
|
||||
|
||||
|
|
@ -83,22 +84,22 @@ class Server:
|
|||
Refresh buckets that haven't had any lookups in the last hour
|
||||
(per section 2.3 of the paper).
|
||||
"""
|
||||
ds = []
|
||||
for node_id in self.protocol.getRefreshIDs():
|
||||
results = []
|
||||
for node_id in self.protocol.get_refresh_ids():
|
||||
node = Node(node_id)
|
||||
nearest = self.protocol.router.findNeighbors(node, self.alpha)
|
||||
nearest = self.protocol.router.find_neighbors(node, self.alpha)
|
||||
spider = NodeSpiderCrawl(self.protocol, node, nearest,
|
||||
self.ksize, self.alpha)
|
||||
ds.append(spider.find())
|
||||
results.append(spider.find())
|
||||
|
||||
# do our crawling
|
||||
await asyncio.gather(*ds)
|
||||
await asyncio.gather(*results)
|
||||
|
||||
# now republish keys older than one hour
|
||||
for dkey, value in self.storage.iteritemsOlderThan(3600):
|
||||
for dkey, value in self.storage.iter_older_than(3600):
|
||||
await self.set_digest(dkey, value)
|
||||
|
||||
def bootstrappableNeighbors(self):
|
||||
def bootstrappable_neighbors(self):
|
||||
"""
|
||||
Get a :class:`list` of (ip, port) :class:`tuple` pairs suitable for
|
||||
use as an argument to the bootstrap method.
|
||||
|
|
@ -108,7 +109,7 @@ class Server:
|
|||
storing them if this server is going down for a while. When it comes
|
||||
back up, the list of nodes can be used to bootstrap.
|
||||
"""
|
||||
neighbors = self.protocol.router.findNeighbors(self.node)
|
||||
neighbors = self.protocol.router.find_neighbors(self.node)
|
||||
return [tuple(n)[-2:] for n in neighbors]
|
||||
|
||||
async def bootstrap(self, addrs):
|
||||
|
|
@ -145,8 +146,8 @@ class Server:
|
|||
if self.storage.get(dkey) is not None:
|
||||
return self.storage.get(dkey)
|
||||
node = Node(dkey)
|
||||
nearest = self.protocol.router.findNeighbors(node)
|
||||
if len(nearest) == 0:
|
||||
nearest = self.protocol.router.find_neighbors(node)
|
||||
if not nearest:
|
||||
log.warning("There are no known neighbors to get key %s", key)
|
||||
return None
|
||||
spider = ValueSpiderCrawl(self.protocol, node, nearest,
|
||||
|
|
@ -172,8 +173,8 @@ class Server:
|
|||
"""
|
||||
node = Node(dkey)
|
||||
|
||||
nearest = self.protocol.router.findNeighbors(node)
|
||||
if len(nearest) == 0:
|
||||
nearest = self.protocol.router.find_neighbors(node)
|
||||
if not nearest:
|
||||
log.warning("There are no known neighbors to set key %s",
|
||||
dkey.hex())
|
||||
return False
|
||||
|
|
@ -184,14 +185,14 @@ class Server:
|
|||
log.info("setting '%s' on %s", dkey.hex(), list(map(str, nodes)))
|
||||
|
||||
# if this node is close too, then store here as well
|
||||
biggest = max([n.distanceTo(node) for n in nodes])
|
||||
if self.node.distanceTo(node) < biggest:
|
||||
biggest = max([n.distance_to(node) for n in nodes])
|
||||
if self.node.distance_to(node) < biggest:
|
||||
self.storage[dkey] = value
|
||||
ds = [self.protocol.callStore(n, dkey, value) for n in nodes]
|
||||
results = [self.protocol.call_store(n, dkey, value) for n in nodes]
|
||||
# return true only if at least one store call succeeded
|
||||
return any(await asyncio.gather(*ds))
|
||||
return any(await asyncio.gather(*results))
|
||||
|
||||
def saveState(self, fname):
|
||||
def save_state(self, fname):
|
||||
"""
|
||||
Save the state of this node (the alpha/ksize/id/immediate neighbors)
|
||||
to a cache file with the given fname.
|
||||
|
|
@ -201,29 +202,29 @@ class Server:
|
|||
'ksize': self.ksize,
|
||||
'alpha': self.alpha,
|
||||
'id': self.node.id,
|
||||
'neighbors': self.bootstrappableNeighbors()
|
||||
'neighbors': self.bootstrappable_neighbors()
|
||||
}
|
||||
if len(data['neighbors']) == 0:
|
||||
if not data['neighbors']:
|
||||
log.warning("No known neighbors, so not writing to cache.")
|
||||
return
|
||||
with open(fname, 'wb') as f:
|
||||
pickle.dump(data, f)
|
||||
with open(fname, 'wb') as file:
|
||||
pickle.dump(data, file)
|
||||
|
||||
@classmethod
|
||||
def loadState(self, fname):
|
||||
def load_state(cls, fname):
|
||||
"""
|
||||
Load the state of this node (the alpha/ksize/id/immediate neighbors)
|
||||
from a cache file with the given fname.
|
||||
"""
|
||||
log.info("Loading state from %s", fname)
|
||||
with open(fname, 'rb') as f:
|
||||
data = pickle.load(f)
|
||||
s = Server(data['ksize'], data['alpha'], data['id'])
|
||||
if len(data['neighbors']) > 0:
|
||||
s.bootstrap(data['neighbors'])
|
||||
return s
|
||||
with open(fname, 'rb') as file:
|
||||
data = pickle.load(file)
|
||||
svr = Server(data['ksize'], data['alpha'], data['id'])
|
||||
if data['neighbors']:
|
||||
svr.bootstrap(data['neighbors'])
|
||||
return svr
|
||||
|
||||
def saveStateRegularly(self, fname, frequency=600):
|
||||
def save_state_regularly(self, fname, frequency=600):
|
||||
"""
|
||||
Save the state of node with a given regularity to the given
|
||||
filename.
|
||||
|
|
@ -233,10 +234,10 @@ class Server:
|
|||
frequency: Frequency in seconds that the state should be saved.
|
||||
By default, 10 minutes.
|
||||
"""
|
||||
self.saveState(fname)
|
||||
self.save_state(fname)
|
||||
loop = asyncio.get_event_loop()
|
||||
self.save_state_loop = loop.call_later(frequency,
|
||||
self.saveStateRegularly,
|
||||
self.save_state_regularly,
|
||||
fname,
|
||||
frequency)
|
||||
|
||||
|
|
@ -246,13 +247,11 @@ def check_dht_value_type(value):
|
|||
Checks to see if the type of the value is a valid type for
|
||||
placing in the dht.
|
||||
"""
|
||||
typeset = set(
|
||||
[
|
||||
int,
|
||||
float,
|
||||
bool,
|
||||
str,
|
||||
bytes,
|
||||
]
|
||||
)
|
||||
return type(value) in typeset
|
||||
typeset = [
|
||||
int,
|
||||
float,
|
||||
bool,
|
||||
str,
|
||||
bytes
|
||||
]
|
||||
return type(value) in typeset # pylint: disable=unidiomatic-typecheck
|
||||
|
|
|
|||
|
|
@ -4,15 +4,15 @@ import heapq
|
|||
|
||||
class Node:
|
||||
def __init__(self, node_id, ip=None, port=None):
|
||||
self.id = node_id
|
||||
self.ip = ip
|
||||
self.id = node_id # pylint: disable=invalid-name
|
||||
self.ip = ip # pylint: disable=invalid-name
|
||||
self.port = port
|
||||
self.long_id = int(node_id.hex(), 16)
|
||||
|
||||
def sameHomeAs(self, node):
|
||||
def same_home_as(self, node):
|
||||
return self.ip == node.ip and self.port == node.port
|
||||
|
||||
def distanceTo(self, node):
|
||||
def distance_to(self, node):
|
||||
"""
|
||||
Get the distance between this node and another.
|
||||
"""
|
||||
|
|
@ -47,7 +47,7 @@ class NodeHeap:
|
|||
self.contacted = set()
|
||||
self.maxsize = maxsize
|
||||
|
||||
def remove(self, peerIDs):
|
||||
def remove(self, peers):
|
||||
"""
|
||||
Remove a list of peer ids from this heap. Note that while this
|
||||
heap retains a constant visible size (based on the iterator), it's
|
||||
|
|
@ -55,34 +55,32 @@ class NodeHeap:
|
|||
removal of nodes may not change the visible size as previously added
|
||||
nodes suddenly become visible.
|
||||
"""
|
||||
peerIDs = set(peerIDs)
|
||||
if len(peerIDs) == 0:
|
||||
peers = set(peers)
|
||||
if not peers:
|
||||
return
|
||||
nheap = []
|
||||
for distance, node in self.heap:
|
||||
if node.id not in peerIDs:
|
||||
if node.id not in peers:
|
||||
heapq.heappush(nheap, (distance, node))
|
||||
self.heap = nheap
|
||||
|
||||
def getNodeById(self, node_id):
|
||||
def get_node(self, node_id):
|
||||
for _, node in self.heap:
|
||||
if node.id == node_id:
|
||||
return node
|
||||
return None
|
||||
|
||||
def allBeenContacted(self):
|
||||
return len(self.getUncontacted()) == 0
|
||||
def have_contacted_all(self):
|
||||
return len(self.get_uncontacted()) == 0
|
||||
|
||||
def getIDs(self):
|
||||
def get_ids(self):
|
||||
return [n.id for n in self]
|
||||
|
||||
def markContacted(self, node):
|
||||
def mark_contacted(self, node):
|
||||
self.contacted.add(node.id)
|
||||
|
||||
def popleft(self):
|
||||
if len(self) > 0:
|
||||
return heapq.heappop(self.heap)[1]
|
||||
return None
|
||||
return heapq.heappop(self.heap)[1] if self else None
|
||||
|
||||
def push(self, nodes):
|
||||
"""
|
||||
|
|
@ -95,7 +93,7 @@ class NodeHeap:
|
|||
|
||||
for node in nodes:
|
||||
if node not in self:
|
||||
distance = self.node.distanceTo(node)
|
||||
distance = self.node.distance_to(node)
|
||||
heapq.heappush(self.heap, (distance, node))
|
||||
|
||||
def __len__(self):
|
||||
|
|
@ -106,10 +104,10 @@ class NodeHeap:
|
|||
return iter(map(itemgetter(1), nodes))
|
||||
|
||||
def __contains__(self, node):
|
||||
for _, n in self.heap:
|
||||
if node.id == n.id:
|
||||
for _, other in self.heap:
|
||||
if node.id == other.id:
|
||||
return True
|
||||
return False
|
||||
|
||||
def getUncontacted(self):
|
||||
def get_uncontacted(self):
|
||||
return [n for n in self if n.id not in self.contacted]
|
||||
|
|
|
|||
|
|
@ -4,41 +4,41 @@ import logging
|
|||
|
||||
from rpcudp.protocol import RPCProtocol
|
||||
|
||||
from .kademlia.node import Node
|
||||
from .kademlia.routing import RoutingTable
|
||||
from .kademlia.utils import digest
|
||||
from .node import Node
|
||||
from .routing import RoutingTable
|
||||
from .utils import digest
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
log = logging.getLogger(__name__) # pylint: disable=invalid-name
|
||||
|
||||
|
||||
class KademliaProtocol(RPCProtocol):
|
||||
def __init__(self, sourceNode, storage, ksize):
|
||||
def __init__(self, source_node, storage, ksize):
|
||||
RPCProtocol.__init__(self)
|
||||
self.router = RoutingTable(self, ksize, sourceNode)
|
||||
self.router = RoutingTable(self, ksize, source_node)
|
||||
self.storage = storage
|
||||
self.sourceNode = sourceNode
|
||||
self.source_node = source_node
|
||||
|
||||
def getRefreshIDs(self):
|
||||
def get_refresh_ids(self):
|
||||
"""
|
||||
Get ids to search for to keep old buckets up to date.
|
||||
"""
|
||||
ids = []
|
||||
for bucket in self.router.getLonelyBuckets():
|
||||
for bucket in self.router.lonely_buckets():
|
||||
rid = random.randint(*bucket.range).to_bytes(20, byteorder='big')
|
||||
ids.append(rid)
|
||||
return ids
|
||||
|
||||
def rpc_stun(self, sender):
|
||||
def rpc_stun(self, sender): # pylint: disable=no-self-use
|
||||
return sender
|
||||
|
||||
def rpc_ping(self, sender, nodeid):
|
||||
source = Node(nodeid, sender[0], sender[1])
|
||||
self.welcomeIfNewNode(source)
|
||||
return self.sourceNode.id
|
||||
self.welcome_if_new(source)
|
||||
return self.source_node.id
|
||||
|
||||
def rpc_store(self, sender, nodeid, key, value):
|
||||
source = Node(nodeid, sender[0], sender[1])
|
||||
self.welcomeIfNewNode(source)
|
||||
self.welcome_if_new(source)
|
||||
log.debug("got a store request from %s, storing '%s'='%s'",
|
||||
sender, key.hex(), value)
|
||||
self.storage[key] = value
|
||||
|
|
@ -48,42 +48,42 @@ class KademliaProtocol(RPCProtocol):
|
|||
log.info("finding neighbors of %i in local table",
|
||||
int(nodeid.hex(), 16))
|
||||
source = Node(nodeid, sender[0], sender[1])
|
||||
self.welcomeIfNewNode(source)
|
||||
self.welcome_if_new(source)
|
||||
node = Node(key)
|
||||
neighbors = self.router.findNeighbors(node, exclude=source)
|
||||
neighbors = self.router.find_neighbors(node, exclude=source)
|
||||
return list(map(tuple, neighbors))
|
||||
|
||||
def rpc_find_value(self, sender, nodeid, key):
|
||||
source = Node(nodeid, sender[0], sender[1])
|
||||
self.welcomeIfNewNode(source)
|
||||
self.welcome_if_new(source)
|
||||
value = self.storage.get(key, None)
|
||||
if value is None:
|
||||
return self.rpc_find_node(sender, nodeid, key)
|
||||
return {'value': value}
|
||||
|
||||
async def callFindNode(self, nodeToAsk, nodeToFind):
|
||||
address = (nodeToAsk.ip, nodeToAsk.port)
|
||||
result = await self.find_node(address, self.sourceNode.id,
|
||||
nodeToFind.id)
|
||||
return self.handleCallResponse(result, nodeToAsk)
|
||||
async def call_find_node(self, node_to_ask, node_to_find):
|
||||
address = (node_to_ask.ip, node_to_ask.port)
|
||||
result = await self.find_node(address, self.source_node.id,
|
||||
node_to_find.id)
|
||||
return self.handle_call_response(result, node_to_ask)
|
||||
|
||||
async def callFindValue(self, nodeToAsk, nodeToFind):
|
||||
address = (nodeToAsk.ip, nodeToAsk.port)
|
||||
result = await self.find_value(address, self.sourceNode.id,
|
||||
nodeToFind.id)
|
||||
return self.handleCallResponse(result, nodeToAsk)
|
||||
async def call_find_value(self, node_to_ask, node_to_find):
|
||||
address = (node_to_ask.ip, node_to_ask.port)
|
||||
result = await self.find_value(address, self.source_node.id,
|
||||
node_to_find.id)
|
||||
return self.handle_call_response(result, node_to_ask)
|
||||
|
||||
async def callPing(self, nodeToAsk):
|
||||
address = (nodeToAsk.ip, nodeToAsk.port)
|
||||
result = await self.ping(address, self.sourceNode.id)
|
||||
return self.handleCallResponse(result, nodeToAsk)
|
||||
async def call_ping(self, node_to_ask):
|
||||
address = (node_to_ask.ip, node_to_ask.port)
|
||||
result = await self.ping(address, self.source_node.id)
|
||||
return self.handle_call_response(result, node_to_ask)
|
||||
|
||||
async def callStore(self, nodeToAsk, key, value):
|
||||
address = (nodeToAsk.ip, nodeToAsk.port)
|
||||
result = await self.store(address, self.sourceNode.id, key, value)
|
||||
return self.handleCallResponse(result, nodeToAsk)
|
||||
async def call_store(self, node_to_ask, key, value):
|
||||
address = (node_to_ask.ip, node_to_ask.port)
|
||||
result = await self.store(address, self.source_node.id, key, value)
|
||||
return self.handle_call_response(result, node_to_ask)
|
||||
|
||||
def welcomeIfNewNode(self, node):
|
||||
def welcome_if_new(self, node):
|
||||
"""
|
||||
Given a new node, send it all the keys/values it should be storing,
|
||||
then add it to the routing table.
|
||||
|
|
@ -97,32 +97,32 @@ class KademliaProtocol(RPCProtocol):
|
|||
is closer than the closest in that list, then store the key/value
|
||||
on the new node (per section 2.5 of the paper)
|
||||
"""
|
||||
if not self.router.isNewNode(node):
|
||||
if not self.router.is_new_node(node):
|
||||
return
|
||||
|
||||
log.info("never seen %s before, adding to router", node)
|
||||
for key, value in self.storage.items():
|
||||
for key, value in self.storage:
|
||||
keynode = Node(digest(key))
|
||||
neighbors = self.router.findNeighbors(keynode)
|
||||
if len(neighbors) > 0:
|
||||
last = neighbors[-1].distanceTo(keynode)
|
||||
newNodeClose = node.distanceTo(keynode) < last
|
||||
first = neighbors[0].distanceTo(keynode)
|
||||
thisNodeClosest = self.sourceNode.distanceTo(keynode) < first
|
||||
if len(neighbors) == 0 or (newNodeClose and thisNodeClosest):
|
||||
asyncio.ensure_future(self.callStore(node, key, value))
|
||||
self.router.addContact(node)
|
||||
neighbors = self.router.find_neighbors(keynode)
|
||||
if neighbors:
|
||||
last = neighbors[-1].distance_to(keynode)
|
||||
new_node_close = node.distance_to(keynode) < last
|
||||
first = neighbors[0].distance_to(keynode)
|
||||
this_closest = self.source_node.distance_to(keynode) < first
|
||||
if not neighbors or (new_node_close and this_closest):
|
||||
asyncio.ensure_future(self.call_store(node, key, value))
|
||||
self.router.add_contact(node)
|
||||
|
||||
def handleCallResponse(self, result, node):
|
||||
def handle_call_response(self, result, node):
|
||||
"""
|
||||
If we get a response, add the node to the routing table. If
|
||||
we get no response, make sure it's removed from the routing table.
|
||||
"""
|
||||
if not result[0]:
|
||||
log.warning("no response from %s, removing from router", node)
|
||||
self.router.removeContact(node)
|
||||
self.router.remove_contact(node)
|
||||
return result
|
||||
|
||||
log.info("got successful response from %s", node)
|
||||
self.welcomeIfNewNode(node)
|
||||
self.welcome_if_new(node)
|
||||
return result
|
||||
|
|
|
|||
|
|
@ -4,22 +4,21 @@ import operator
|
|||
import asyncio
|
||||
|
||||
from collections import OrderedDict
|
||||
|
||||
from .kademlia.utils import OrderedSet, sharedPrefix, bytesToBitString
|
||||
from .utils import OrderedSet, shared_prefix, bytes_to_bit_string
|
||||
|
||||
|
||||
class KBucket:
|
||||
def __init__(self, rangeLower, rangeUpper, ksize):
|
||||
self.range = (rangeLower, rangeUpper)
|
||||
self.nodes = OrderedDict()
|
||||
self.replacementNodes = OrderedSet()
|
||||
self.touchLastUpdated()
|
||||
self.replacement_nodes = OrderedSet()
|
||||
self.touch_last_updated()
|
||||
self.ksize = ksize
|
||||
|
||||
def touchLastUpdated(self):
|
||||
self.lastUpdated = time.monotonic()
|
||||
def touch_last_updated(self):
|
||||
self.last_updated = time.monotonic()
|
||||
|
||||
def getNodes(self):
|
||||
def get_nodes(self):
|
||||
return list(self.nodes.values())
|
||||
|
||||
def split(self):
|
||||
|
|
@ -31,23 +30,23 @@ class KBucket:
|
|||
bucket.nodes[node.id] = node
|
||||
return (one, two)
|
||||
|
||||
def removeNode(self, node):
|
||||
def remove_node(self, node):
|
||||
if node.id not in self.nodes:
|
||||
return
|
||||
|
||||
# delete node, and see if we can add a replacement
|
||||
del self.nodes[node.id]
|
||||
if len(self.replacementNodes) > 0:
|
||||
newnode = self.replacementNodes.pop()
|
||||
if self.replacement_nodes:
|
||||
newnode = self.replacement_nodes.pop()
|
||||
self.nodes[newnode.id] = newnode
|
||||
|
||||
def hasInRange(self, node):
|
||||
def has_in_range(self, node):
|
||||
return self.range[0] <= node.long_id <= self.range[1]
|
||||
|
||||
def isNewNode(self, node):
|
||||
def is_new_node(self, node):
|
||||
return node.id not in self.nodes
|
||||
|
||||
def addNode(self, node):
|
||||
def add_node(self, node):
|
||||
"""
|
||||
Add a C{Node} to the C{KBucket}. Return True if successful,
|
||||
False if the bucket is full.
|
||||
|
|
@ -61,14 +60,14 @@ class KBucket:
|
|||
elif len(self) < self.ksize:
|
||||
self.nodes[node.id] = node
|
||||
else:
|
||||
self.replacementNodes.push(node)
|
||||
self.replacement_nodes.push(node)
|
||||
return False
|
||||
return True
|
||||
|
||||
def depth(self):
|
||||
vals = self.nodes.values()
|
||||
sp = sharedPrefix([bytesToBitString(n.id) for n in vals])
|
||||
return len(sp)
|
||||
sprefix = shared_prefix([bytes_to_bit_string(n.id) for n in vals])
|
||||
return len(sprefix)
|
||||
|
||||
def head(self):
|
||||
return list(self.nodes.values())[0]
|
||||
|
|
@ -82,11 +81,11 @@ class KBucket:
|
|||
|
||||
class TableTraverser:
|
||||
def __init__(self, table, startNode):
|
||||
index = table.getBucketFor(startNode)
|
||||
table.buckets[index].touchLastUpdated()
|
||||
self.currentNodes = table.buckets[index].getNodes()
|
||||
self.leftBuckets = table.buckets[:index]
|
||||
self.rightBuckets = table.buckets[(index + 1):]
|
||||
index = table.get_bucket_for(startNode)
|
||||
table.buckets[index].touch_last_updated()
|
||||
self.current_nodes = table.buckets[index].get_nodes()
|
||||
self.left_buckets = table.buckets[:index]
|
||||
self.right_buckets = table.buckets[(index + 1):]
|
||||
self.left = True
|
||||
|
||||
def __iter__(self):
|
||||
|
|
@ -96,16 +95,16 @@ class TableTraverser:
|
|||
"""
|
||||
Pop an item from the left subtree, then right, then left, etc.
|
||||
"""
|
||||
if len(self.currentNodes) > 0:
|
||||
return self.currentNodes.pop()
|
||||
if self.current_nodes:
|
||||
return self.current_nodes.pop()
|
||||
|
||||
if self.left and len(self.leftBuckets) > 0:
|
||||
self.currentNodes = self.leftBuckets.pop().getNodes()
|
||||
if self.left and self.left_buckets:
|
||||
self.current_nodes = self.left_buckets.pop().get_nodes()
|
||||
self.left = False
|
||||
return next(self)
|
||||
|
||||
if len(self.rightBuckets) > 0:
|
||||
self.currentNodes = self.rightBuckets.pop(0).getNodes()
|
||||
if self.right_buckets:
|
||||
self.current_nodes = self.right_buckets.pop(0).get_nodes()
|
||||
self.left = True
|
||||
return next(self)
|
||||
|
||||
|
|
@ -127,58 +126,60 @@ class RoutingTable:
|
|||
def flush(self):
|
||||
self.buckets = [KBucket(0, 2 ** 160, self.ksize)]
|
||||
|
||||
def splitBucket(self, index):
|
||||
def split_bucket(self, index):
|
||||
one, two = self.buckets[index].split()
|
||||
self.buckets[index] = one
|
||||
self.buckets.insert(index + 1, two)
|
||||
|
||||
def getLonelyBuckets(self):
|
||||
def lonely_buckets(self):
|
||||
"""
|
||||
Get all of the buckets that haven't been updated in over
|
||||
an hour.
|
||||
"""
|
||||
hrago = time.monotonic() - 3600
|
||||
return [b for b in self.buckets if b.lastUpdated < hrago]
|
||||
return [b for b in self.buckets if b.last_updated < hrago]
|
||||
|
||||
def removeContact(self, node):
|
||||
index = self.getBucketFor(node)
|
||||
self.buckets[index].removeNode(node)
|
||||
def remove_contact(self, node):
|
||||
index = self.get_bucket_for(node)
|
||||
self.buckets[index].remove_node(node)
|
||||
|
||||
def isNewNode(self, node):
|
||||
index = self.getBucketFor(node)
|
||||
return self.buckets[index].isNewNode(node)
|
||||
def is_new_node(self, node):
|
||||
index = self.get_bucket_for(node)
|
||||
return self.buckets[index].is_new_node(node)
|
||||
|
||||
def addContact(self, node):
|
||||
index = self.getBucketFor(node)
|
||||
def add_contact(self, node):
|
||||
index = self.get_bucket_for(node)
|
||||
bucket = self.buckets[index]
|
||||
|
||||
# this will succeed unless the bucket is full
|
||||
if bucket.addNode(node):
|
||||
if bucket.add_node(node):
|
||||
return
|
||||
|
||||
# Per section 4.2 of paper, split if the bucket has the node
|
||||
# in its range or if the depth is not congruent to 0 mod 5
|
||||
if bucket.hasInRange(self.node) or bucket.depth() % 5 != 0:
|
||||
self.splitBucket(index)
|
||||
self.addContact(node)
|
||||
if bucket.has_in_range(self.node) or bucket.depth() % 5 != 0:
|
||||
self.split_bucket(index)
|
||||
self.add_contact(node)
|
||||
else:
|
||||
asyncio.ensure_future(self.protocol.callPing(bucket.head()))
|
||||
asyncio.ensure_future(self.protocol.call_ping(bucket.head()))
|
||||
|
||||
def getBucketFor(self, node):
|
||||
def get_bucket_for(self, node):
|
||||
"""
|
||||
Get the index of the bucket that the given node would fall into.
|
||||
"""
|
||||
for index, bucket in enumerate(self.buckets):
|
||||
if node.long_id < bucket.range[1]:
|
||||
return index
|
||||
# we should never be here, but make linter happy
|
||||
return None
|
||||
|
||||
def findNeighbors(self, node, k=None, exclude=None):
|
||||
def find_neighbors(self, node, k=None, exclude=None):
|
||||
k = k or self.ksize
|
||||
nodes = []
|
||||
for neighbor in TableTraverser(self, node):
|
||||
notexcluded = exclude is None or not neighbor.sameHomeAs(exclude)
|
||||
notexcluded = exclude is None or not neighbor.same_home_as(exclude)
|
||||
if neighbor.id != node.id and notexcluded:
|
||||
heapq.heappush(nodes, (node.distanceTo(neighbor), neighbor))
|
||||
heapq.heappush(nodes, (node.distance_to(neighbor), neighbor))
|
||||
if len(nodes) == k:
|
||||
break
|
||||
|
||||
|
|
|
|||
|
|
@ -2,44 +2,45 @@ import time
|
|||
from itertools import takewhile
|
||||
import operator
|
||||
from collections import OrderedDict
|
||||
from abc import abstractmethod, ABC
|
||||
|
||||
|
||||
class IStorage:
|
||||
class IStorage(ABC):
|
||||
"""
|
||||
Local storage for this node.
|
||||
IStorage implementations of get must return the same type as put in by set
|
||||
"""
|
||||
|
||||
@abstractmethod
|
||||
def __setitem__(self, key, value):
|
||||
"""
|
||||
Set a key to the given value.
|
||||
"""
|
||||
raise NotImplementedError
|
||||
|
||||
@abstractmethod
|
||||
def __getitem__(self, key):
|
||||
"""
|
||||
Get the given key. If item doesn't exist, raises C{KeyError}
|
||||
"""
|
||||
raise NotImplementedError
|
||||
|
||||
@abstractmethod
|
||||
def get(self, key, default=None):
|
||||
"""
|
||||
Get given key. If not found, return default.
|
||||
"""
|
||||
raise NotImplementedError
|
||||
|
||||
def iteritemsOlderThan(self, secondsOld):
|
||||
@abstractmethod
|
||||
def iter_older_than(self, seconds_old):
|
||||
"""
|
||||
Return the an iterator over (key, value) tuples for items older
|
||||
than the given secondsOld.
|
||||
"""
|
||||
raise NotImplementedError
|
||||
|
||||
@abstractmethod
|
||||
def __iter__(self):
|
||||
"""
|
||||
Get the iterator for this storage, should yield tuple of (key, value)
|
||||
"""
|
||||
raise NotImplementedError
|
||||
|
||||
|
||||
class ForgetfulStorage(IStorage):
|
||||
|
|
@ -57,7 +58,7 @@ class ForgetfulStorage(IStorage):
|
|||
self.cull()
|
||||
|
||||
def cull(self):
|
||||
for _, _ in self.iteritemsOlderThan(self.ttl):
|
||||
for _, _ in self.iter_older_than(self.ttl):
|
||||
self.data.popitem(last=False)
|
||||
|
||||
def get(self, key, default=None):
|
||||
|
|
@ -70,27 +71,23 @@ class ForgetfulStorage(IStorage):
|
|||
self.cull()
|
||||
return self.data[key][1]
|
||||
|
||||
def __iter__(self):
|
||||
self.cull()
|
||||
return iter(self.data)
|
||||
|
||||
def __repr__(self):
|
||||
self.cull()
|
||||
return repr(self.data)
|
||||
|
||||
def iteritemsOlderThan(self, secondsOld):
|
||||
minBirthday = time.monotonic() - secondsOld
|
||||
zipped = self._tripleIterable()
|
||||
matches = takewhile(lambda r: minBirthday >= r[1], zipped)
|
||||
def iter_older_than(self, seconds_old):
|
||||
min_birthday = time.monotonic() - seconds_old
|
||||
zipped = self._triple_iter()
|
||||
matches = takewhile(lambda r: min_birthday >= r[1], zipped)
|
||||
return list(map(operator.itemgetter(0, 2), matches))
|
||||
|
||||
def _tripleIterable(self):
|
||||
def _triple_iter(self):
|
||||
ikeys = self.data.keys()
|
||||
ibirthday = map(operator.itemgetter(0), self.data.values())
|
||||
ivalues = map(operator.itemgetter(1), self.data.values())
|
||||
return zip(ikeys, ibirthday, ivalues)
|
||||
|
||||
def items(self):
|
||||
def __iter__(self):
|
||||
self.cull()
|
||||
ikeys = self.data.keys()
|
||||
ivalues = map(operator.itemgetter(1), self.data.values())
|
||||
|
|
|
|||
|
|
@ -6,16 +6,16 @@ import operator
|
|||
import asyncio
|
||||
|
||||
|
||||
async def gather_dict(d):
|
||||
cors = list(d.values())
|
||||
async def gather_dict(dic):
|
||||
cors = list(dic.values())
|
||||
results = await asyncio.gather(*cors)
|
||||
return dict(zip(d.keys(), results))
|
||||
return dict(zip(dic.keys(), results))
|
||||
|
||||
|
||||
def digest(s):
|
||||
if not isinstance(s, bytes):
|
||||
s = str(s).encode('utf8')
|
||||
return hashlib.sha1(s).digest()
|
||||
def digest(string):
|
||||
if not isinstance(string, bytes):
|
||||
string = str(string).encode('utf8')
|
||||
return hashlib.sha1(string).digest()
|
||||
|
||||
|
||||
class OrderedSet(list):
|
||||
|
|
@ -34,7 +34,7 @@ class OrderedSet(list):
|
|||
self.append(thing)
|
||||
|
||||
|
||||
def sharedPrefix(args):
|
||||
def shared_prefix(args):
|
||||
"""
|
||||
Find the shared prefix between the strings.
|
||||
|
||||
|
|
@ -52,6 +52,6 @@ def sharedPrefix(args):
|
|||
return args[0][:i]
|
||||
|
||||
|
||||
def bytesToBitString(bites):
|
||||
def bytes_to_bit_string(bites):
|
||||
bits = [bin(bite)[2:].rjust(8, '0') for bite in bites]
|
||||
return "".join(bits)
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user