Function fetchWithCache

api/shared/upstream.ts:46–64

(
	url: string,
	cf?: CloudflareCacheOptions,
)

 * upstream failures.
 */
const fetchWithCache = async (
	url: string,
	cf?: CloudflareCacheOptions,
): Promise<Response> => {
	const init = cf ? ({ cf } as RequestInit) : undefined;
	const response = await fetch(url, init);

	if (!response.ok) {
		if (response.status === 404) {
			throw new UpstreamNotFoundError(url);
		}

		throw new HTTPException(502, {
			message: `Bad Gateway. Failed to fetch ${url}: ${response.status}`,
		});
	}

	return response;
};

/** Fetches an upstream binary with asset-specific cache policy. */
const fetchBinaryBytes = async (url: string): Promise<Uint8Array> =>