def sendRequest(self, method, args):
# make message
# send it
msg = {TID: chr(self.mtid), TYP: REQ, REQ: method, ARG: args}
self.mtid = (self.mtid + 1) % 256
s = bencode(msg)
d = Deferred()
self.tids[msg[TID]] = d
self.call_later(self.timeOut, KRPC_TIMEOUT, (msg[TID], ))
self.call_later(self._send, 0, (s, d))
return d
def findNode(self, id, callback, errback=None):
""" returns the contact info for node, or the k closest nodes, from the global table """
# get K nodes out of local table/cache, or the node we want
nodes = self.table.findNodes(id, invalid=True)
l = [x for x in nodes if x.invalid]
if len(l) > 4:
nodes = sample(l, 4) + self.table.findNodes(id, invalid=False)[:4]
d = Deferred()
if errback:
d.addCallbacks(callback, errback)
else:
d.addCallback(callback)
if len(nodes) == 1 and nodes[0].id == id:
d.callback(nodes)
else:
# create our search state
state = FindNode(self, id, d.callback, self.rawserver.add_task)
self.rawserver.external_add_task(state.goWithNodes, 0, (nodes, ))
