Network and communications questions
dsc at swcp.com
Wed Feb 4 19:20:24 CST 2004
On Wednesday, February 4, 2004, at 05:58 PM, Brent Anderson wrote:
> I am writing a group of programs designed to communicate with each
> other over a network and wanted to know specifics on the best way to
> have one program send and receive over a network connection, how to
> set it up in Revolution, and any other tips and commands that I can't
> seem to find in the documentation. Another question I have is how
> Revolution communicates over a network in the first place (does it use
> peer to peer or does it need a computer to act as a server, or some
> other form of connection?)
At the sockets level (low), you do not need to have a server, but you
might want to design around one, especially if firewalls might be
involved. This level is TCP/IP UDP and TCP. UDP is an "unreliable"
message protocol. TCP is a connection oriented "reliable" byte-stream
I have a very simple remote send over UDP library that will work for
small commands at a low rate. The command protocol you set up should
send confirmations. If sockets is too low level, I can send you that,
if I can find it. Most of the source code consists of caveats in the
However, at the higher levels you might use an http server and have all
apps communicate with that. I know there is some level of SOAP
available. I think Andre Garzia has tinkered with an alternate RPC
protocol over http.
I don't know the status of libIPC; Jan could say better.
Alex Rice has a Rendezvous external should you need it in getting into
If this is a simple network communications requirement, I'd start with
UDP sockets, datagrams. Look at Transcript dictionary entries for
'open socket' 'close socket' 'write to socket' 'accept' 'read from
socket' and related messages.
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