扭曲：如何在初始连接时识别协议，然后委派给适当的协议实现？

扭曲：如何在初始连接时识别协议，然后委派给适当的协议实现？

与其在整个协议实现过程中混合决策逻辑，不如将它放在一个地方。

class DecisionProtocol(Protocol):    def connectionMade(self):        self.state = "undecided"    def makeProgressTowardsDecision(self, bytes):        # Do some stuff, eventually return ProtoA() or ProtoB()    def dataReceived(self, bytes):        if self.state == "undecided": proto, extra = self.makeProgressTowardsDecision(bytes) if proto is not None:     self.state = "decided"     self.decidedonProtocol = proto     self.decidedOnProtocol.makeConnection(self.transport)     if extra:         self.decidedOnProtocol.dataReceived(extra)        else: self.decidedOnProtocol.dataReceived(bytes)    def connectionLost(self, reason):        if self.state == "decided": self.decidedOnProtocol.connectionLost(reason)

最终，您可以用更少的样板实现此目的：http :
//tm.tl/3204/