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@jvns

jvns/gotty.js Secret

Created Jan 15, 2021
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(function() {
var httpsEnabled = window.location.protocol == "https:";
var args = window.location.search;
var url = (httpsEnabled ? 'wss://' : 'ws://') + window.location.host + window.location.pathname + 'ws';
var protocols = ["gotty"];
var autoReconnect = -1;
var openWs = function() {
var ws = new WebSocket(url, protocols);
var term;
var pingTimer;
ws.onopen = function(event) {
ws.send(JSON.stringify({ Arguments: args, AuthToken: gotty_auth_token,}));
pingTimer = setInterval(sendPing, 30 * 1000, ws);
hterm.defaultStorage = new lib.Storage.Memory();
term = new hterm.Terminal();
if (setPrefs) { // julia: added this to set terminal colors
setPrefs(term)
}
term.getPrefs().set("send-encoding", "raw");
term.onTerminalReady = function() {
var io = term.io.push();
io.onVTKeystroke = function(str) {
ws.send("0" + str);
};
io.sendString = io.onVTKeystroke;
io.onTerminalResize = function(columns, rows) {
ws.send(
"2" + JSON.stringify(
{
columns: columns,
rows: rows,
}
)
)
};
term.installKeyboard();
};
term.decorate(document.getElementById("terminal"));
};
ws.onmessage = function(event) {
data = event.data.slice(1);
switch(event.data[0]) {
case '0':
term.io.writeUTF8(window.atob(data));
break;
case '1':
// pong
break;
case '2':
term.setWindowTitle(data);
break;
case '3':
preferences = JSON.parse(data);
Object.keys(preferences).forEach(function(key) {
console.log("Setting " + key + ": " + preferences[key]);
term.getPrefs().set(key, preferences[key]);
});
break;
case '4':
autoReconnect = JSON.parse(data);
console.log("Enabling reconnect: " + autoReconnect + " seconds")
break;
}
};
ws.onclose = function(event) {
if (term) {
term.uninstallKeyboard();
term.io.showOverlay("Connection Closed", null);
}
clearInterval(pingTimer);
if (autoReconnect > 0) {
setTimeout(openWs, autoReconnect * 1000);
}
};
}
var sendPing = function(ws) {
ws.send("1");
}
openWs();
})()
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