Hi,
> El 28-02-2017, a las 14:27, Benoit St-Jean via Pharo-users
> <pharo-users@lists.pharo.org> escribió:
>
>
> De: Benoit St-Jean <bstj...@yahoo.com>
> Asunto: Socket, network, testing and coding
> Fecha: 28 de febrero de 2017, 14:27:58 CLST
> Para: Any question about pharo is welcome <pharo-users@lists.pharo.org>
> Responder a: Benoit St-Jean <bstj...@yahoo.com>
>
>
> Hi guys,
>
> Quick question regarding sockets and testing.
>
> I'm trying to implement a simple communication protocol to exchange data
> (strings) between 2 images and I was wondering what was the easiest way to
> test/develop my code? I want to be able to do something similar to a chat
> client between 2 images where none of those 2 images acts as a server. So
> data can originate from any of those 2 images and both images have to
> "listen" to each other. Besides, both images would have to transmit/receive
> on the same port.
>
> 1) Is this possible (the way I want to do/test it)?
Yes, you can test it.
> 2) How do I simulate something like this on a *single* machine running those
> 2 images?
Something like this:
| listener clientSocket serverSocket |
listener := Socket newTCP.
[ listener listenOn: 0 backlogSize: 4.
clientSocket := Socket newTCP.
clientSocket connectTo: #[127 0 0 1] port: listener localPort.
clientSocket waitForConnectionFor: 1.
serverSocket := listener waitForAcceptFor: 1. ]
ensure: [ listener destroy ].
since then you have client and server socket. You can call it clientOne,
clientTwo.
> 3) Do I need to have one of those 2 images act as a "server” ?
At least one image has to serve as a server (listen to connections). Maybe you
could use a discovery service protocol. I do not have any experience about it.
> 4) Any helpful tip and/or interesting link to propose?
> 5) Can you think of any simple code or example I could look at to understand
> what I need to do?
There is a Trantor project where you could learn from:
http://smalltalkhub.com/#!/~EvanDonahue/Trantor
<http://smalltalkhub.com/#!/~EvanDonahue/Trantor>
You can check an example here: TRNLog exampleOpenChatWithUserIdUsingTrantor
But you are going to be more interested in testing: TrantorNodeTest
Download it using:
Gofer it
smalltalkhubUser: 'EvanDonahue' project: 'Trantor';
configuration;
loadBleedingEdge.
And maybe Zinc (part of the Pharo image) has also good test examples.
Cheers,
Juraj
>
> -----------------
> Benoît St-Jean
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