[zeromq-dev] Support multipart with SNDMORE and RCVMORE?

[Pieter Hintjens]

Hi,

If you want to send a file, you need some kind of staging protocol
that will let you send in chunks.

This thread may help you:

http://www.mail-archive.com/zeromq-dev@lists.zeromq.org/msg09064.html

-Pieter

On Sat, May 26, 2012 at 5:19 PM, zhiguo zhao <zhaozg at gmail.com> wrote:
> Hi, all.
>
>      Please consider below items.
>      I.
>             If is a short msg, It can be handle in one time with zmq_send
> and zmq_recv, This will match 80%.
>     2.
>            If to process a long message,(may be 1G size) and result is
> short,(just like do a message digest), client can send more times with
> SNDMORE, and server will reply only onces to get result,  2 plus 1 with
> match 98%.
>
>          CLIENT       -----------------------------------   SERVER
>         send(msg_p1, MORE)      ->                           recv
>
>  digest(msg_p1)
>         send(msg_p2, MORE)      ->                           recv
>
>  digest(msg_p2)
>         send(msg_pn)      ->                                        recv
>
>   mdvalue = digest_result(msg_pn)
>             recv                             <----
> send(mdvalue)
>    3.
>           If to process a long message and result is long too, just think
> that do  3des-cbc encrypt a big file, It make me fool, I can't find a
> solution.
>
>          CLIENT       -----------------------------------   SERVER
>         send(msg_p1, MORE)      ->                           recv
>
>  encrypt(msg_p1) as part1
>                   ?                            <-
> send(e_msg_p1,[MORE])    will failed.
>
>         send(msg_p2, MORE)      ->                           recv
>
>        any advice to help me handle this.
>
>  Thanks.
>
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