87 lines
2.1 KiB
TypeScript
87 lines
2.1 KiB
TypeScript
// eslint-disable-next-line no-restricted-globals
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const cacheApi = self.caches;
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export enum Type {
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Text,
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Blob,
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Json,
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}
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export async function fetch(cacheName: string, key: string, type: Type) {
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if (!cacheApi) {
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return undefined;
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}
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try {
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const request = new Request(key);
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const cache = await cacheApi.open(cacheName);
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const response = await cache.match(request);
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if (!response) {
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return undefined;
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}
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switch (type) {
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case Type.Text:
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return await response.text();
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case Type.Blob: {
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const blob = await response.blob();
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// Safari does not return correct Content-Type header for webp images.
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if (key.substr(0, 7) === 'sticker') {
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return new Blob([blob], { type: 'image/webp' });
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}
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// iOS Safari fails to preserve `type` in cache
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if (!blob.type) {
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const contentType = response.headers.get('Content-Type');
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if (contentType) {
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return new Blob([blob], { type: contentType });
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}
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}
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return blob;
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}
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case Type.Json:
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return await response.json();
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default:
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return undefined;
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}
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} catch (err) {
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// eslint-disable-next-line no-console
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console.warn(err);
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return undefined;
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}
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}
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export async function save(cacheName: string, key: string, data: AnyLiteral | Blob | string) {
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if (!cacheApi) {
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return undefined;
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}
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try {
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const cacheData = typeof data === 'string' || data instanceof Blob ? data : JSON.stringify(data);
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const request = new Request(key);
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const response = new Response(cacheData);
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const cache = await cacheApi.open(cacheName);
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return await cache.put(request, response);
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} catch (err) {
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// eslint-disable-next-line no-console
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console.warn(err);
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return undefined;
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}
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}
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export async function clear(cacheName: string) {
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try {
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if (!cacheApi) {
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return undefined;
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}
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return await cacheApi.delete(cacheName);
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} catch (err) {
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// eslint-disable-next-line no-console
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console.warn(err);
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return undefined;
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}
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}
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