58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
/**
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* Serve files from /Users/guto/ufo/processing/* and /Users/guto/ufo/raw/* via
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* /api/static/png/<doc>/<file>, /api/static/crops/<doc>/<page>/<file>, etc.
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*
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* Sandboxed to UFO_ROOT to prevent path traversal.
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*/
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import fs from "node:fs/promises";
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import path from "node:path";
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import { NextResponse } from "next/server";
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import { UFO_ROOT } from "@/lib/wiki";
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const ALLOWED_ROOTS = ["processing", "raw"];
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function mimeFor(ext: string): string {
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switch (ext.toLowerCase()) {
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case ".png": return "image/png";
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case ".jpg":
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case ".jpeg": return "image/jpeg";
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case ".webp": return "image/webp";
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case ".gif": return "image/gif";
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case ".svg": return "image/svg+xml";
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case ".pdf": return "application/pdf";
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case ".txt": return "text/plain; charset=utf-8";
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case ".json": return "application/json";
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case ".mp4": return "video/mp4";
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default: return "application/octet-stream";
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}
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}
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export async function GET(_req: Request, ctx: { params: Promise<{ path: string[] }> }) {
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const { path: parts } = await ctx.params;
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if (!parts || parts.length < 2) {
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return new NextResponse("Bad Request", { status: 400 });
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}
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const root = parts[0];
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if (!ALLOWED_ROOTS.includes(root)) {
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return new NextResponse("Forbidden", { status: 403 });
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}
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const rel = parts.slice(1).join("/");
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const abs = path.resolve(UFO_ROOT, root, rel);
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// Path traversal guard
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const expectedPrefix = path.resolve(UFO_ROOT, root) + path.sep;
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if (!abs.startsWith(expectedPrefix) && abs !== path.resolve(UFO_ROOT, root)) {
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return new NextResponse("Forbidden", { status: 403 });
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}
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try {
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const buf = await fs.readFile(abs);
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const ext = path.extname(abs);
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return new NextResponse(buf, {
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headers: {
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"content-type": mimeFor(ext),
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"cache-control": "public, max-age=3600",
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},
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});
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} catch {
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return new NextResponse("Not Found", { status: 404 });
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}
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}
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