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[IMPROVED] Header construction during republish with existing headers.… #6127

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merged 1 commit into from
Nov 14, 2024
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[IMPROVED] Header construction during republish with existing headers.… #6127

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20 changes: 10 additions & 10 deletions server/stream.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5055,31 +5055,31 @@ func (mset *stream) processJetStreamMsg(subject, reply string, hdr, msg []byte,

// Check for republish.
if republish {
const ht = "NATS/1.0\r\nNats-Stream: %s\r\nNats-Subject: %s\r\nNats-Sequence: %d\r\nNats-Time-Stamp: %s\r\nNats-Last-Sequence: %d\r\n\r\n"
const htho = "NATS/1.0\r\nNats-Stream: %s\r\nNats-Subject: %s\r\nNats-Sequence: %d\r\nNats-Time-Stamp: %s\r\nNats-Last-Sequence: %d\r\nNats-Msg-Size: %d\r\n\r\n"
// When adding to existing headers, will use the fmt.Append version so this skips the headers from above.
const hoff = 10

tsStr := time.Unix(0, ts).UTC().Format(time.RFC3339Nano)
var rpMsg []byte
if len(hdr) == 0 {
const ht = "NATS/1.0\r\nNats-Stream: %s\r\nNats-Subject: %s\r\nNats-Sequence: %d\r\nNats-Time-Stamp: %s\r\nNats-Last-Sequence: %d\r\n\r\n"
const htho = "NATS/1.0\r\nNats-Stream: %s\r\nNats-Subject: %s\r\nNats-Sequence: %d\r\nNats-Time-Stamp: %s\r\nNats-Last-Sequence: %d\r\nNats-Msg-Size: %d\r\n\r\n"
if !thdrsOnly {
hdr = fmt.Appendf(nil, ht, name, subject, seq, tsStr, tlseq)
rpMsg = copyBytes(msg)
} else {
hdr = fmt.Appendf(nil, htho, name, subject, seq, tsStr, tlseq, len(msg))
}
} else {
// Slow path.
hdr = genHeader(hdr, JSStream, name)
hdr = genHeader(hdr, JSSubject, subject)
hdr = genHeader(hdr, JSSequence, strconv.FormatUint(seq, 10))
hdr = genHeader(hdr, JSTimeStamp, tsStr)
hdr = genHeader(hdr, JSLastSequence, strconv.FormatUint(tlseq, 10))
// use hdr[:end:end] to make sure as we add we copy the original hdr.
end := len(hdr) - LEN_CR_LF
if !thdrsOnly {
hdr = fmt.Appendf(hdr[:end:end], ht[hoff:], name, subject, seq, tsStr, tlseq)
rpMsg = copyBytes(msg)
} else {
hdr = genHeader(hdr, JSMsgSize, strconv.Itoa(len(msg)))
hdr = fmt.Appendf(hdr[:end:end], htho[hoff:], name, subject, seq, tsStr, tlseq, len(msg))
}
}
mset.outq.send(newJSPubMsg(tsubj, _EMPTY_, _EMPTY_, copyBytes(hdr), rpMsg, nil, seq))
mset.outq.send(newJSPubMsg(tsubj, _EMPTY_, _EMPTY_, hdr, rpMsg, nil, seq))
}

// Send response here.
Expand Down