ioloop.py 文件源码

def recv(self, buffer_size):
        try:
            data = self.socket.recv(buffer_size)
        except socket.error as err:
            debug("call: recv(), err: %s" % err, inst=self)
            if err.errno in _ERRNOS_DISCONNECTED:
                self.handle_close()
                return b''
            elif err.errno in _ERRNOS_RETRY:
                raise RetryError
            else:
                raise
        else:
            if not data:
                # a closed connection is indicated by signaling
                # a read condition, and having recv() return 0.
                self.handle_close()
                return b''
            else:
                return data