server.py

from twisted.internet.protocol import Protocol, Factory
class StrokeEcho(Protocol):
    def __init__(self, factory):
        self.factory = factory

    def connectionMade(self):
        print self
        self.factory.echoers.append(self)

    def dataReceived(self, data):
        print "Data:",data
        print "Connected clients:",self.factory.echoers
        for echoer in self.factory.echoers:
            if not self:
                print "sent data to:",echoer
                echoer.transport.write(data)

    def connectionLost(self, reason):
        self.factory.echoers.remove(self)

class StrokeEchoFactory(Factory):
    def __init__(self):
        self.echoers = []

    def buildProtocol(self, addr):
        return StrokeEcho(self)



2016-04-06 20:53:58+0530 [-] <stroke_protocol.StrokeEcho instance at 0x0000000004FD32C8>
2016-04-06 20:54:15+0530 [-] <stroke_protocol.StrokeEcho instance at 0x000000000504CFC8>
2016-04-06 20:54:19+0530 [-] Data: [{"color": "#ffffff", "width": 2, "points": [298.0, 383.0, 298.0, 382.00000000000006, 298.0, 367.0, 298.0, 355.0, 298.0, 330.0, 298.0, 307.0, 298.0, 297.0, 298.0, 280.00000000000006, 298.0, 270.0, 298.0, 256.0, 300.0, 251.0, 300.0, 245.0, 300.0, 242.00000000000003, 300.0, 238.99999999999997, 300.0, 237.0, 300.0, 235.99999999999997, 301.0, 235.99999999999997, 301.0, 235.00000000000003]}]
2016-04-06 20:54:19+0530 [-] Connected clients: [<stroke_protocol.StrokeEcho instance at 0x0000000004FD32C8>, <stroke_protocol.StrokeEcho instance at 0x000000000504CFC8>]