htb.py 文件源码

def drip(self):
        """Let some of the bucket drain.

        How much of the bucket drains depends on how long it has been
        since I was last called.

        @returns: True if I am now empty.
        @returntype: bool
        """
        if self.parentBucket is not None:
            self.parentBucket.drip()

        if self.rate is None:
            self.content = 0
            return True
        else:
            now = time()
            deltaT = now - self.lastDrip
            self.content = long(max(0, self.content - deltaT * self.rate))
            self.lastDrip = now
            return False