asyncore.py 文件源码

def recv(self, buffer_size):
        try:
            data = self.socket.recv(buffer_size)
            if not data:
                # a closed connection is indicated by signaling
                # a read condition, and having recv() return 0.
                self.handle_close()
                return ''
            else:
                return data
        except socket.error, why:
            # winsock sometimes throws ENOTCONN
            if why.args[0] in _DISCONNECTED:
                self.handle_close()
                return ''
            else:
                raise