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23 changes: 21 additions & 2 deletions template.html
Original file line number Diff line number Diff line change
Expand Up @@ -643,7 +643,11 @@
const noop = () => null;
let cloudHost = {CLOUD_HOST};
let ws;
let connectionAttempts = 0;
let queuedData = {};
window.queuedData = queuedData;
function openConnection() {
connectionAttempts++;
try {
ws = new WebSocket(cloudHost);
} catch (err) {
Expand All @@ -667,13 +671,28 @@
function sendData(data) {
data.user = DESIRED_USERNAME;
data.project_id = PROJECT_ID;
ws.send(JSON.stringify(data) + '\n');
// https://github.com/LLK/scratch-gui/blob/develop/src/lib/cloud-provider.js#L141-L148
if (ws && ws.readyState === WebSocket.OPEN) {
ws.send(JSON.stringify(data) + '\n');
} else {
// This way, multiple changes to the same variable only are changed once
queuedData[`${data.method}:${data.name}`] = data;
}
}
function onOpen() {
connectionAttempts = 1;
sendData({method: 'handshake'});
// https://github.com/LLK/scratch-gui/blob/develop/src/lib/cloud-provider.js#L79-L85
for (const data of Object.values(queuedData)) {
ws.send(JSON.stringify(data) + '\n');
}
queuedData = [];
}
function onClose() {
setTimeout(openConnection, 500);
// https://github.com/LLK/scratch-gui/blob/develop/src/lib/cloud-provider.js#L90-L100
const randomizedTimeout = Math.random() * (Math.pow(2, Math.min(connectionAttempts, 5)) - 1) * 1000;
setTimeout(openConnection, randomizedTimeout);
console.log(`Reconnecting in ${(randomizedTimeout / 1000).toFixed(1)}s (attempt #${connectionAttempts})`);
}
% special-cloud %
function postError(err) {
Expand Down