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index.html
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<!doctype html>
<html>
<head>
<title>hterm</title>
<script src="hterm_all.js"></script>
</head>
<body>
<div id="terminal" style="position: absolute; top: 0; left: 0; right: 0; bottom: 0;"></div>
<script>
hterm.defaultStorage = new lib.Storage.Memory();
var t = new hterm.Terminal;
t.decorate(document.getElementById("terminal"));
t.installKeyboard();
var ws = new WebSocket(window.location.protocol.replace("http", "ws") + "//" + window.location.host);
ws.binaryType = "arraybuffer";
var td = new TextDecoder;
ws.onmessage = function(m) {
var msg = Array.from(new Uint8Array(m.data));
var response = [];
var output = [];
var recv = "recv";
var send = "send";
for (var i = 0; i < msg.length; i++) {
if (msg[i] === 255) { // IAC
recv += " IAC";
switch (msg[++i]) {
case 241: // NOP
break;
case 242: // Data Mark
break; //
case 243: // Break
break; //
case 244: // Interrupt Process
break; //
case 245: // Abort output
break; //
case 246: // Are You There
break; //
case 247: // Erase character
break; //
case 248: // Erase Line
break; //
case 249: // Go ahead
break; //
case 250: // SB
recv += " SB";
if (msg[++i] === 24 && msg[++i] === 1 && msg[++i] === 255 && msg[++i] === 240) { // TERMINAL-TYPE ECHO
recv += " TERMINAL-TYPE ECHO IAC SE";
response.push(255, 250, 24, 0, 120, 116, 101, 114, 109, 45, 50, 53, 54, 99, 111, 108, 111, 114, 255, 240);
send += " IAC SB TERMINAL-TYPE TRANSMIT-BINARY xterm-256color IAC SE";
} else throw msg[i];
break; //
case 251: // WILL
recv += " WILL " + msg[++i];
break; //
case 252: // WON'T
recv += " WON'T";
break; //
case 253: // DO
recv += " DO";
if (msg[++i] === 24 || msg[i] === 0) { // TERMINAL-TYPE
recv += " TERMINAL-TYPE";
response.push(255, 251, msg[i]);
send += " IAC WILL TERMINAL-TYPE";
} else if (msg[i] === 31) {
recv += " NAWS";
response.push(255, 251, 31, 255, 250, 31, t.io.columnCount >> 8 & 255, t.io.columnCount & 255, t.io.rowCount >> 8 & 255, t.io.rowCount & 255, 255, 240);
send += " IAC WILL NAWS IAC SB NAWS " + t.io.columnCount + " " + t.io.rowCount + " IAC SE";
} else {
recv += " " + msg[i];
response.push(255, 252, msg[i]);
send += " IAC WON'T " + msg[i];
}
break; //
case 254: // DON'T
recv += " DON'T";
break; //
case 255: // IAC
output.push(255);
break;
default: throw msg[i];
}
} else output.push(msg[i]);
}
console.log(msg);
if (msg.length - output.length) console.log(msg.length - output.length + " " + recv);
if (response.length) console.log(response.length + " " + send);
if (response.length > 0) {
var buffer = new Uint8Array(response);
if (ws.readyState === ws.OPEN) ws.send(buffer);
else if (ws.readyState === ws.CONNECTING) ws.addEventListener("open", ws.send.bind(ws, buffer));
}
if (output.length > 0) t.io.print(td.decode(new Uint8Array(output)));
};
var te = new TextEncoder;
t.io.onVTKeystroke = t.io.sendString = function(str) { // weird issues
var buffer = te.encode(str);
if (ws.readyState === ws.OPEN) ws.send(buffer);
else if (ws.readyState === ws.CONNECTING) ws.addEventListener("open", ws.send.bind(ws, buffer));
};
t.io.onTerminalResize = function(columns, rows) {
var buffer = new Uint8Array([255, 250, 31, columns >> 8 & 255, columns & 255, rows >> 8 & 255, rows & 255, 255, 240]);
if (ws.readyState === ws.OPEN) ws.send(buffer);
else if (ws.readyState === ws.CONNECTING) ws.addEventListener("open", ws.send.bind(ws, buffer));
};
</script>
</body>
</html>