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importScripts('sw-helpers.js');
async function getFetchResult(record) {
const response = await record.responseReady.catch(() => null);
if (!response)
return null;
return {
url: response.url,
status: response.status,
type: response.type,
secretHeader: response.headers.get('X-Secret-Header'),
text: await response.text().catch(() => 'error'),
};
}
function handleBackgroundFetchEvent(event) {
event.waitUntil(event.registration.matchAll()
.then(records => {
if (!records)
return [];
if (!records.map)
return [records];
return records;
})
.then(records => Promise.all(
records.map(record => getFetchResult(record))))
.then(results => {
const registrationCopy =
cloneRegistration(event.registration);
sendMessageToDocument({
type: event.type,
eventRegistration: registrationCopy,
results
});
})
.catch(error => {
sendMessageToDocument({
type: event.type,
eventRegistration: {},
results: [],
error: true
});
}));
}
self.addEventListener('backgroundfetchsuccess', handleBackgroundFetchEvent);
self.addEventListener('backgroundfetchfail', handleBackgroundFetchEvent);
self.addEventListener('backgroundfetchabort', handleBackgroundFetchEvent);