[Lazarus] ZeroMQ Bindings

silvioprog silvioprog at gmail.com
Tue Aug 23 18:40:13 CEST 2016


On Tue, Aug 23, 2016 at 1:26 PM, silvioprog <silvioprog at gmail.com> wrote:

> On Tue, Aug 23, 2016 at 1:15 PM, silvioprog <silvioprog at gmail.com> wrote:
>
>> On Tue, Aug 23, 2016 at 1:07 PM, Sandro Cumerlato <
>> sandro.cumerlato at gmail.com> wrote:
>>
>>> Maybe other side is not written in Free Pascal, I guess.
>>>
>>
>> Indeed.
>>
>>
>>> BTW: I got ZeroMQ TCP working (look at the attachments), IPC not yet :-(
>>
>>
>> I'm going to try it here with TEncoding, just a moment ...
>>
>
> Done. Please check the attached file: first, compile and run the myserver,
> after, compile and run the myclient. When you run the client it will print
> '0' and server will print a lot of 'hello world' message in the terminal. I
> noticed it creates a socket called 'localscp'.
>
> I'm not sure about zmq because it is very new for me.
>

A possible way to print the 'hello world' message for each client.

=== begin code ===

const
  BUF_SIZE = 1024 * 1000;
var
  context: pointer;
  responder: pointer;
  buf: TBytes;
  recv: Integer;
begin
  while True do
  begin
    context := zmq_ctx_new;
    responder := zmq_socket(context, ZMQ_REP);
    zmq_bind(responder, 'ipc://localscp');
    SetLength(buf, BUF_SIZE);
    while True do
    begin
      recv := zmq_recv(responder, buf[0], BUF_SIZE, 0);
      if recv < 1 then
        Break;
      if recv > BUF_SIZE then
        SetLength(buf, recv);
    end;
    WriteLn(TEncoding.UTF8.GetString(buf));
  end;
end

=== end code ===

Sorry for the weird code, it is just a test, I would need time to read and
understand zmq.

-- 
Silvio Cl├ęcio
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