websocket-challenge/solution.html at master · DaQuirm/websocket-challenge · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<title>WebSockets</title>
		<script>
			window.addEventListener("load", function() {
				var token = token;

				var task2 = {};

				var socket = new WebSocket("ws://localhost:8080");
				socket.binaryType = "arraybuffer";
				socket.onopen = function() {
					socket.send(JSON.stringify({ msg: "challenge_accepted", name: "DaQuirm" }));
				};

				socket.onmessage = function(evt) {
					if (typeof evt.data == "string") {
						var msg = JSON.parse(evt.data);
						switch (msg.msg) {
							case "auth":
								token = msg.auth_token;
								socket.send(JSON.stringify({ msg: "task_one", auth_token: token }));
								break;
							 case "compute":
							    var result;
							    switch (msg.operator) {
							        case '+':
							            result = msg.operands[0] + msg.operands[1];
							            break;
							        case '-':
							            result = msg.operands[0] - msg.operands[1];
							            break;
							        case '*':
							            result = msg.operands[0] * msg.operands[1];
							            break;
							    }
								socket.send(JSON.stringify({ msg: "task_one_result", auth_token: token, result: result }));
							 	break;
							case "win":
								socket.send(JSON.stringify({ msg: "next", auth_token: token }));
								break;

							case "binary_sum":
								task2 = msg;
								break;
						}
					} else {
					    var result;
					    var arrs = {
					        8: Uint8Array,
					        16: Uint16Array,
					    }
					    var arr = new arrs[task2.bits](evt.data);
					    var sum = 0;
					    for (var i = 0; i < arr.length; i++) {
					        sum += arr[i];
					    }
					    result = sum;
					    socket.send(JSON.stringify({ msg: "task_two_result", auth_token: token, result: result }));
					}
				}
			});
		</script>
	</head>
	<body>

	</body>
</html>