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, ))