src/routes/api/proxy/+server.ts


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export const GET = async ({ url }) => {
	const response = await fetch(url.searchParams.get('url') as string);
	const contentType = response.headers.get('content-type') as string;

	if (contentType.includes('application/json')) {
		return Response.json(await response.json(), {
			headers: { 'Content-Type': 'application/json' }
		});
	} else if (contentType.includes('text/html') || contentType.includes('text/plain')) {
		return new Response(await response.text(), {
			headers: { 'Content-Type': contentType }
		});
	} else {
		return new Response(await response.blob(), {
			headers: { 'Content-Type': contentType }
		});
	}
};