39 lines
1.3 KiB
TypeScript
39 lines
1.3 KiB
TypeScript
import { join } from "node:path";
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const PUBLIC_DIR = join(import.meta.dir, "..", "public");
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const MIME: Record<string, string> = {
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".html": "text/html; charset=utf-8",
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".css": "text/css; charset=utf-8",
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".js": "text/javascript; charset=utf-8",
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".json": "application/json",
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".svg": "image/svg+xml",
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".png": "image/png",
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".ico": "image/x-icon",
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};
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export async function serveStatic(req: Request, url: URL): Promise<Response> {
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if (req.method !== "GET" && req.method !== "HEAD") {
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return new Response("not found", { status: 404 });
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}
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let path = decodeURIComponent(url.pathname);
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if (path === "/") path = "/index.html";
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// block traversal
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if (path.includes("..") || path.includes("\0")) return new Response("not found", { status: 404 });
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const file = Bun.file(join(PUBLIC_DIR, path));
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if (!(await file.exists())) {
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// SPA fallback for non-API routes
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if (!path.startsWith("/api/")) {
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return new Response(Bun.file(join(PUBLIC_DIR, "index.html")));
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}
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return new Response("not found", { status: 404 });
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}
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const ext = path.slice(path.lastIndexOf("."));
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return new Response(file, {
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headers: {
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"Content-Type": MIME[ext] ?? "application/octet-stream",
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"Cache-Control": path === "/index.html" ? "no-cache" : "public, max-age=3600",
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},
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});
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}
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