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Handle redirected requests correctly in service worker

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This commit is contained in:
Pavel Djundik 2019-03-21 11:22:01 +02:00
parent 92098286e7
commit 2c85f61e62
1 changed files with 25 additions and 1 deletions
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26
client/service-worker.js
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@ -47,9 +47,33 @@ async function putInCache(request, response) {
await cache.put(request, response);
}
async function cleanRedirect(response) {
// Not all browsers support the Response.body stream, so fall back
// to reading the entire body into memory as a blob.
const bodyPromise = "body" in response ?
Promise.resolve(response.body) :
response.blob();
const body = await bodyPromise;
// new Response() is happy when passed either a stream or a Blob.
return new Response(body, {
headers: response.headers,
status: response.status,
statusText: response.statusText,
});
}
async function networkOrCache(event) {
try {
const response = await fetch(event.request, {cache: "no-cache"});
let response = await fetch(event.request, {
cache: "no-cache",
redirect: "follow",
});
if (response.redirected) {
response = await cleanRedirect(response.clone());
}
if (response.ok) {
event.waitUntil(putInCache(event.request, response));