Esempio n. 1
0
func readMPUB(r io.Reader, tmp []byte, topic *nsqd.Topic, maxMessageSize int64, traceEnable bool) ([]*nsqd.Message, []*bytes.Buffer, error) {
	numMessages, err := readLen(r, tmp)
	if err != nil {
		return nil, nil, protocol.NewFatalClientErr(err, "E_BAD_BODY", "MPUB failed to read message count")
	}

	if numMessages <= 0 {
		return nil, nil, protocol.NewFatalClientErr(err, "E_BAD_BODY",
			fmt.Sprintf("MPUB invalid message count %d", numMessages))
	}

	messages := make([]*nsqd.Message, 0, numMessages)
	buffers := make([]*bytes.Buffer, 0, numMessages)
	for i := int32(0); i < numMessages; i++ {
		messageSize, err := readLen(r, tmp)
		if err != nil {
			return nil, buffers, protocol.NewFatalClientErr(err, "E_BAD_MESSAGE",
				fmt.Sprintf("MPUB failed to read message(%d) body size", i))
		}

		if messageSize <= 0 {
			return nil, buffers, protocol.NewFatalClientErr(nil, "E_BAD_MESSAGE",
				fmt.Sprintf("MPUB invalid message(%d) body size %d", i, messageSize))
		}

		if int64(messageSize) > maxMessageSize {
			return nil, buffers, protocol.NewFatalClientErr(nil, "E_BAD_MESSAGE",
				fmt.Sprintf("MPUB message too big %d > %d", messageSize, maxMessageSize))
		}

		b := topic.BufferPoolGet(int(messageSize))
		buffers = append(buffers, b)
		_, err = io.CopyN(b, r, int64(messageSize))
		if err != nil {
			return nil, buffers, protocol.NewFatalClientErr(err, "E_BAD_MESSAGE", "MPUB failed to read message body")
		}
		msgBody := b.Bytes()[:messageSize]

		traceID := uint64(0)
		var realBody []byte
		if traceEnable {
			if messageSize <= nsqd.MsgTraceIDLength {
				return nil, buffers, protocol.NewFatalClientErr(nil, "E_BAD_MESSAGE",
					fmt.Sprintf("MPUB invalid message(%d) body size %d for tracing", i, messageSize))
			}
			traceID = binary.BigEndian.Uint64(msgBody[:nsqd.MsgTraceIDLength])
			realBody = msgBody[nsqd.MsgTraceIDLength:]
		} else {
			realBody = msgBody
		}
		msg := nsqd.NewMessage(0, realBody)
		msg.TraceID = traceID
		messages = append(messages, msg)
		topic.GetDetailStats().UpdateTopicMsgStats(int64(len(realBody)), 0)
	}

	return messages, buffers, nil
}