mongoose/examples/json-rpc-over-websocket/web_root/index.html

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2021-11-23 00:45:14 +08:00
<!DOCTYPE html>
<html lang="en">
<body>
<h1>JSON-RPC over Websocket demo</h1>
<input id="url" type="text" placeholder="Type URL" value="ws://localhost:8000/websocket" style="width:20em;" />
<button id="connect">connect</button>
<div style="height: 0.3em;">&nbsp;</div>
<button id="btn1">Calculate 1 + 2</button>
<button id="btn2">Calculate 2 * 3</button>
<div style="margin-top: 1em;">Event log:</div>
<div id="log" style="background: #eee; height: 10em; padding: 0.5em; overflow:auto;"><div>
</body>
<script src="rpc-over-websocket.js"></script>
<script>
var rpc, E = function(id) { return document.getElementById(id); };
var url = E('url'), connect = E('connect'), btn1 = E('btn1'), btn2 = E('btn2'), msglog = E('log');
var enable = function(en) { btn1.disabled = btn2.disabled = !en; url.disabled = en; connect.innerHTML = en ? 'disconnect' : 'connect'; };
var log = text => msglog.innerHTML += text + '<br/>\n';
enable(false);
connect.onclick = function() {
console.log(rpc);
if (rpc) { rpc.close(); rpc = null; return; }
rpc = jsonrpc(url.value,
() => enable(true),
() => enable(false),
msg => log('NOTIFICATION: ' + JSON.stringify(msg)));
};
btn1.onclick = ev => rpc.call('sum', [1, 2]).then(res => log('SUM:' + JSON.stringify(res)));
btn2.onclick = ev => rpc.call('mul', [2, 3]).then(res => log('MUL:' + JSON.stringify(res)));
</script>
</html>