Websockets

Built on-top of the HTTP protocol as its upgrade feature. Keeps the connection alive until user closes the tab. Allows to have a full duplex channel between server an unlimited number of clients.

Setting up the connection

For the simplicity there is a special JS script (or let's say a tiny framework) framework.js, which contais all necessary functions. Just put the following lines somewhere in your header file


        
            <script type="text/javascript" src="websockets.js"></script>

            <script>

                    WSPSetHost("<?wsphost?>");

            </script>

It will define the default url to the address of your webservera^\[Currency]\264

In the Wolfram's console the message "websocket handshake" should pop up, when you open the webpage.

Send the data to client

There are a few ways, how to do it.

Broadcast to all clients


     
            WebSocketBroadcast[server, expression]

Where the expression field should be WL symbol like


    
            WebSocketBroadcast[server, CustomFunction[Table[i, {i,1,10}], "Hello!"]]

This function will be converted to JSON array including all arguments. On the client's side the corresponding function must be


        
            core.CustomFunction = function(args, env) {

                    console.log(interpretate(args[0]));

                    console.log(args[1]);

            };

Place it somewhere in the footer. It will print all two arguments you senta^\[Currency]\264

If you are sure that the argument will be a string, you can ommit interpretate function, which decodes Mathematica's expressions.

Broadcast to the channel

this section is in the development

Subscribe to the channel

this section is in the development

Send the data to the server

this section is in the development