Function getDownloadAsset

api/worker/src/features/cdn/handler.ts:251–333

(
	c: Context<AppEnv>,
	id: string,
)

};

export const getDownloadAsset = async (
	c: Context<AppEnv>,
	id: string,
): Promise<Response> => {
	const metadata = await getFontById(c, id);
	if (!metadata) {
		throw notFound('Not Found. Font does not exist.');
	}

	const axes = metadata.variable || undefined;
	const [staticVersions, variableVersions] = await Promise.all([
		getPublishedVersions(id, false),
		axes ? getPublishedVersions(id, true) : undefined,
	]);
	const staticVersion =
		staticVersions.length > 0
			? resolveVersionTag('latest', staticVersions)
			: undefined;
	const variableVersion = variableVersions?.length
		? resolveVersionTag('latest', variableVersions)
		: undefined;
	const versions = staticVersion
		? { staticVersion, variableVersion }
		: variableVersion
			? { variableVersion }
			: undefined;
	if (!versions) {
		throw notFound(
			'Unable to resolve download: no published versions available',
		);
	}
	const downloadKey = getDownloadKey(
		id,
		versions.staticVersion,
		versions.variableVersion,
	);
	const readDownload = () =>
		getStoredBinaryObject(c, downloadKey, c.req.raw.headers);
	const respond = (asset: StoredBinaryAsset) =>
		respondWithBinary(asset, {
			cachePolicy: {
				...CACHE_POLICIES.floating,
				'Cache-Control': 'public, no-cache',
			},
			contentType: 'zip',
			filename: `${id}.zip`,
		});

	const existing = await readDownload();
	if (existing) {
		return respond(existing);
	}

	const build = await startDownloadBuild(c, {
		mode: 'download',
		...versions,
		metadata,
	});