TCP Socket Client Example

[Laeeth Isharc via Digitalmars-d]

On Friday, 14 August 2015 at 14:06:03 UTC, Kingsley wrote:
> Hi
>
> Does anyone have some examples of making a client socket 
> connection to a host on a port and parsing the incoming data in 
> some kind of loop.
>
> --K

Nanomsg might be one option if you control the host - by one of 
the main authors of Zeromq.  He decided to rewrite in C and it 
addresses some architectural flaws of Zeromq.  (At least one 
smart guy in London D community agrees it's better).

http://www.infoq.com/news/2012/03/Crossroads-IO
http://nanomsg.org/

Nanomsg itself is at an early stage, and I think the author has a 
lot on his plate (if I recall right he is now at Google) so 
progress isn't as fast as one would like.

But it's usable, and I have some primitive D bindings/wrapper 
here.  Nanomsg seems stable enough for me, and one or two 
glitches in bindings/wrappers but I am using them for my stuff.  
I know that if nanomsg ends up being a disaster I can always 
switch to zeromq, which is similar enough to do so easily.


https://github.com/Laeeth/d-nanomsg.git

D written for C style bindings for pipeline here:

int node0 (string xurl)
{
   int sock = nn_socket (AF_SP, NN_PULL);
   auto url=xurl.toStringz;
   assert(sock >= 0);
   assert(nn_bind (sock, url) >= 0);
   while (1)
     {
       char* buf = cast(char*)0;
       int bytes = nn_recv (sock, &buf, NN_MSG, 0);
       assert (bytes >= 0);
       writefln("NODE0: RECEIVED %s bytes: \"%s\"", 
bytes,to!string(buf));
       nn_freemsg (buf);
     }
     return 0;
}