CrossBrowdy - Basic tutorial

Networking

WebSockets

Here is an example of WebSockets management (through the SockJS client library):


	//Tries to starts a connection to the WebSockets (SockJS) server:
	var websocket = CB_Net.Sockets.SockJS.listen
	(
		//Defines the server address:
		"http://WebSockets_server_URL:port/example",
		
		//Defines the handler for the "onOpen" event (optional):
		function webSocketsOnOpen(evt)
		{
			CB_console("The 'onOpen' event was fired!");
			CB_console(websocket.transport); //Shows the "transport".
		},
		
		//Defines the handler for the "onClose" event (optional):
		function webSocketsOnClose(evt)
		{
			CB_console("The 'onClose' event was fired! Reason: " + evt.reason);
		},
		
		//Defines the handler for the "onMessage" event (optional):
		function webSocketsOnMessage(evt)
		{
			CB_console("The 'onMessage' event was fired! Data received: " + evt.data);
		},
		
		//Defines the handler for the "onError" event (optional):
		function webSocketsOnError(evt)
		{
			CB_console("The 'onError' event was fired!");
			CB_console(evt); //Prints whole event object.
		},
		
		//Other parameters (internal usage recommended):
		undefined, //options
		undefined //protocols
	);

	//Tries to send a message to the server (if 'websocket' is not provided, it will use the last one created (stored in 'CB_Net.Sockets.SockJS.websocketLast'):
	CB_Net.Sockets.SockJS.send
	(
		//Message to send:
		"Hello, WebSockets! This is a test...",
		
		//WebSockets object to use (optional):
		websocket, //If not provided, it will use the last one created (stored in 'CB_Net.Sockets.SockJS.websocketLast').
		
		//Defines a handler for the "onError" event (optional):
		function(evt) { CB_console("Failed to send the message!"); CB_console(evt); } //Prints the event object.
	);
	
	//Tries to close the connection:
	CB_Net.Sockets.SockJS.close
	(
		//WebSockets object to use (optional):
		websocket, //If not provided, it will use the last one created (stored in 'CB_Net.Sockets.SockJS.websocketLast').
		
		//Defines a handler for the "onError" event (optional):
		function(evt) { CB_console("Failed to close the connection!"); CB_console(evt); } //Prints the event object.
	);
To get more information about the usage of this feature, read the SockJS client library documentation.

Check the API documentation to read more about the CB_Net, the CB_Net.Sockets and the CB_Net.Sockets.SockJS static classes.

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CrossBrowdy by Joan Alba Maldonado