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function makeFileBlob(obj) {
return new Promise(function (resolve, reject) {
var request = indexedDB.open("file_blob_response_worker", 1);
request.onerror = reject;
request.onupgradeneeded = function (evt) {
var db = evt.target.result;
db.onerror = reject;
var objectStore = db.createObjectStore("test", { autoIncrement: true });
var index = objectStore.createIndex("test", "index");
};
request.onsuccess = function (evt) {
var db = evt.target.result;
db.onerror = reject;
var blob = new Blob([JSON.stringify(obj)], { type: "application/json" });
var data = { blob, index: 5 };
objectStore = db.transaction("test", "readwrite").objectStore("test");
objectStore.add(data).onsuccess = function (event) {
var key = event.target.result;
objectStore = db.transaction("test").objectStore("test");
objectStore.get(key).onsuccess = function (event1) {
resolve(event1.target.result.blob);
};
};
};
});
}
self.addEventListener("fetch", function (evt) {
var result = { value: "success" };
evt.respondWith(
makeFileBlob(result).then(function (blob) {
return new Response(blob);
})
);
});