RE: TCPStream / tcpstream question

[Pierre Bacquet]

Pavel,

> -----Message d'origine-----
> De : address@hidden
> [mailto:address@hidden
> la part de Pavel Tsekov
> Envoyé : jeudi 8 novembre 2001 17:39
> À : address@hidden
> Objet : TCPStream / tcpstream question
>
>
> I've read some articles on binary io using stdc++
> streams and most of them advise not to use it if
> possible and if you dont know exactly what you do.
> My question is is the tcpstream class suitable
> for transferring binary data ?

IMHO this is not related to CommonC++ itself but
to underlying TCP sockets.

Because TCP is byte-oriented and not message-oriented
what has been sent in one chunk can be received in 2 chunks
or more at the other end; oppositely, 2 consecutive messages
can be received as one single chunk.

If you want to use binary transfers :
. Either add a end of message marker and loop until you find it.
  This workd provided that the end of message marker can't appear
  in the message itself
. Or prepend the message with a length indicator and once you have
  read the length (2 or 4 bytes) keep on reading until you've read
  exactly length bytes.

Just my 0.02$ worth.

Pierre.