fumadocs-openapi/dist/server/proxy.js

Generate MDX docs for your OpenAPI spec

//#region src/server/proxy.ts
const keys = [
	"GET",
	"POST",
	"PUT",
	"DELETE",
	"PATCH",
	"HEAD"
];
function createProxy(options = {}) {
	const { allowedOrigins, allowedUrls, filterRequest = (req) => {
		return !allowedUrls || allowedUrls.some((item) => req.url.startsWith(item));
	}, overrides } = options;
	const handlers = {};
	async function handler(req) {
		const url = new URL(req.url).searchParams.get("url");
		if (!url) return Response.json("[Proxy] A `url` query parameter is required for proxy url", { status: 400 });
		const parsedUrl = URL.parse(url);
		if (!parsedUrl) return Response.json("[Proxy] Invalid `url` parameter value.", { status: 400 });
		if (allowedOrigins && !allowedOrigins.includes(parsedUrl.origin)) return Response.json(`[Proxy] The origin "${parsedUrl.origin}" is not allowed.`, { status: 400 });
		const contentLength = req.headers.get("content-length");
		const hasBody = contentLength && parseInt(contentLength) > 0;
		let proxied = new Request(parsedUrl, {
			method: req.method,
			cache: "no-cache",
			headers: req.headers,
			body: hasBody && [
				"POST",
				"PUT",
				"PATCH",
				"DELETE"
			].includes(req.method.toUpperCase()) ? await req.arrayBuffer() : void 0
		});
		if (overrides?.request) proxied = overrides.request(proxied);
		if (!filterRequest(proxied)) return Response.json("[Proxy] The proxied request is not allowed", { status: 403 });
		proxied.headers.forEach((_value, originalKey) => {
			if (originalKey.toLowerCase() === "origin") proxied.headers.delete(originalKey);
		});
		let res = await fetch(proxied).catch((e) => new Error(e.toString()));
		if (res instanceof Error) return Response.json(`[Proxy] Failed to proxy request: ${res.message}`, { status: 500 });
		if (overrides?.response) res = overrides.response(res);
		const headers = new Headers(res.headers);
		headers.forEach((_value, originalKey) => {
			if (originalKey.toLowerCase().startsWith("access-control-")) headers.delete(originalKey);
		});
		headers.set("X-Forwarded-Host", res.url);
		return new Response(res.body, {
			status: res.status,
			statusText: res.statusText,
			headers
		});
	}
	for (const key of keys) handlers[key] = handler;
	return handlers;
}

//#endregion
export { createProxy };
//# sourceMappingURL=proxy.js.map