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self.addEventListener("activate", event => event.waitUntil(self.clients.claim()));
let port;
self.addEventListener("message", event => {
port = event.ports[0];
port.postMessage("connected");
});
self.addEventListener("fetch", event => {
if (event.request.url.endsWith("?sw-upload-fallback")) {
event.waitUntil(event.handled.then(async () => {
const body = event.request.body;
const locked = body.locked;
const { done } = await body.getReader().read();
port.postMessage({ bodyUsed: event.request.bodyUsed, locked, done });
}));
return;
}
if (!event.request.url.endsWith("sw-upload-backpressure")) {
return;
}
event.respondWith(new Promise(resolve => {
port.onmessage = async () => {
await event.request.body.cancel();
resolve(new Response("cancelled"));
};
port.postMessage("ready");
}));
});