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Fix the JS error "EventSource is not defined" caused by some non-standard browsers (#20584) (#20663)

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This commit is contained in:
wxiaoguang
2022-08-04 19:20:54 +08:00
committed by GitHub
parent 76accb51ed
commit 5ce8fdbc37
3 changed files with 66 additions and 55 deletions
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37
web_src/js/features/notification.js
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@@ -47,14 +47,24 @@ export function initNotificationCount() {
return;
}
if (notificationSettings.EventSourceUpdateTime > 0 && !!window.EventSource && window.SharedWorker) {
let usingPeriodicPoller = false;
const startPeriodicPoller = (timeout, lastCount) => {
if (timeout <= 0 || !Number.isFinite(timeout)) return;
usingPeriodicPoller = true;
lastCount = lastCount ?? notificationCount.text();
setTimeout(async () => {
await updateNotificationCountWithCallback(startPeriodicPoller, timeout, lastCount);
}, timeout);
};
if (notificationSettings.EventSourceUpdateTime > 0 && window.EventSource && window.SharedWorker) {
// Try to connect to the event source via the shared worker first
const worker = new SharedWorker(`${__webpack_public_path__}js/eventsource.sharedworker.js`, 'notification-worker');
worker.addEventListener('error', (event) => {
console.error(event);
console.error('worker error', event);
});
worker.port.addEventListener('messageerror', () => {
console.error('Unable to deserialize message');
console.error('unable to deserialize message');
});
worker.port.postMessage({
type: 'start',
@@ -62,13 +72,16 @@ export function initNotificationCount() {
});
worker.port.addEventListener('message', (event) => {
if (!event.data || !event.data.type) {
console.error(event);
console.error('unknown worker message event', event);
return;
}
if (event.data.type === 'notification-count') {
const _promise = receiveUpdateCount(event.data);
} else if (event.data.type === 'no-event-source') {
// browser doesn't support EventSource, falling back to periodic poller
if (!usingPeriodicPoller) startPeriodicPoller(notificationSettings.MinTimeout);
} else if (event.data.type === 'error') {
console.error(event.data);
console.error('worker port event error', event.data);
} else if (event.data.type === 'logout') {
if (event.data.data !== 'here') {
return;
@@ -86,7 +99,7 @@ export function initNotificationCount() {
}
});
worker.port.addEventListener('error', (e) => {
console.error(e);
console.error('worker port error', e);
});
worker.port.start();
window.addEventListener('beforeunload', () => {
@@ -99,17 +112,7 @@ export function initNotificationCount() {
return;
}
if (notificationSettings.MinTimeout <= 0) {
return;
}
const fn = (timeout, lastCount) => {
setTimeout(() => {
const _promise = updateNotificationCountWithCallback(fn, timeout, lastCount);
}, timeout);
};
fn(notificationSettings.MinTimeout, notificationCount.text());
startPeriodicPoller(notificationSettings.MinTimeout);
}
async function updateNotificationCountWithCallback(callback, timeout, lastCount) {