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
}