send JSON data to Unity from Node.js

Question

I asked this question on the official forum but I guess I don't have enough rep there to be taken seriously :O

I'm using Unity3D free.

Has anyone used https://www.assetstore.unity3d.com/en/#!/content/21721 with success? This plugin actually came the closest to working (I also tried this and this but they don't work for me).

I contacted the author but haven't got a reply yet, so was wondering if someone had made this work?

(edit: I would like to point out that I don't mind buying some other plugin if you have used it and found it easy/useful to communicate with your Node.js server via SocketIO - so please recommend)

Concretely, here's my problem with it: I cant find a way to send JSON data to Unity from Node.js as it keeps getting an error.

I tried numerous ways, and this is one of them:

io.on('connection', function(socket){
    console.log('a user connected');
    var data ='{"email":"[e-mail]","pass":"1234"}';
    var dataJson = JSON.stringify(data);

    console.dir(dataJson);
    socket.emit('newResults', dataJson);
    console.log('server emited newResults');

    socket.on('fromClient', function(data){
        console.log("got msg from client");
        console.dir(data);
    });

    socket.on('disconnect', function(){
        console.log('user disconnected');
    });
});

In Unity3D I use the following function to intercept this:

public void HandleNewResults(SocketIOEvent e){
    Debug.Log(string.Format("[name: {0}, data: {1}]", e.name, e.data));
    Debug.Log (new JSONObject (e.data));
}

but it crashes (it catches the error signal) at this point with (when debugging is turned on) this message:

SocketComm:TestError(SocketIOEvent) (at Assets/_Scripts/SocketComm.cs:58)
SocketIO.SocketIOComponent:EmitEvent(SocketIOEvent) (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:400)
SocketIO.SocketIOComponent:EmitEvent(String) (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:392)
SocketIO.SocketIOComponent:OnError(Object, ErrorEventArgs) (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:382)
WebSocketSharp.Ext:Emit(EventHandler`1, Object, ErrorEventArgs) (at Assets/SocketIO/WebsocketSharp/Ext.cs:992)
WebSocketSharp.WebSocket:error(String) (at Assets/SocketIO/WebsocketSharp/WebSocket.cs:1011)
WebSocketSharp.WebSocket:Send(String) (at Assets/SocketIO/WebsocketSharp/WebSocket.cs:1912)
SocketIO.SocketIOComponent:EmitPacket(Packet) (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:309)
SocketIO.SocketIOComponent:EmitClose() (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:299)
SocketIO.SocketIOComponent:Close() (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:184)
SocketIO.SocketIOComponent:OnApplicationQuit() (at Assets/SocketIO/Scripts/SocketIO/SocketIOComponent.cs:164)

Can you please shed some light on how to aproach this problem?

Answer 1

I used such code:

socket.emit('event_name', {"email":"[e-mail]","pass":"1234"});

I do not know if it right. The function in unity is:

public void TestBoop (SocketIOEvent e)
        {
                Debug.Log ("[SocketIO] Boop received: " + e.name + "--" + e.data);
                );
        }

And output is:

[SocketIO] Boop received: boop--{"email":"[e-mail]","pass":"1234"}

Perhaps it does't right at all but the result at least comes to unity

Answer 2

I'm using Unity3D free.

But SocketIO needs Unity Pro. If you want to use native .NET sockets.

Unity Pro is required in order to build using .NET sockets. You may use a replacement package if you don't want to use native sockets.

You can use Good ol' Sockets.It's usable for sockets.

Answer 3

Make these changes:

    io.on('connection', function(socket){
    console.log('a user connected');
    var data ='{"email":"[e-mail]","pass":"1234"}';
    var dataJson = JSON.stringify(data);

    console.dir(dataJson);
    console.log('server emited newResults');

    socket.on('beep', function(){
        socket.emit('boop', {'boop': dataJson});
        console.log("got msg from client");
        console.dir(data);
    });
    socket.on('disconnect', function(){
        console.log('user disconnected');
    });
});

this is will work.