61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
import { existsSync } from "node:fs";
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import { readFile } 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 { MEDIA_ROOT, resolveMediaPath } from "@/lib/media-storage";
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const ALLOWED_EXT = [".png", ".jpg", ".jpeg", ".gif", ".webp", ".svg", ".bmp"];
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export async function GET(
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_request: Request,
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{ params }: { params: Promise<{ path: string[] }> },
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) {
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const { path: segments } = await params;
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const name = segments.join("/");
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// Prevent path traversal
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if (name.includes("..") || name.includes("\\")) {
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return new NextResponse("Forbidden", { status: 403 });
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}
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const ext = path.extname(name).toLowerCase();
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if (!ALLOWED_EXT.includes(ext)) {
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return new NextResponse("Forbidden", { status: 403 });
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}
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const baseDir = MEDIA_ROOT;
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const filePath = resolveMediaPath(name);
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if (!filePath.startsWith(baseDir + path.sep)) {
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return new NextResponse("Forbidden", { status: 403 });
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}
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// eslint-disable-next-line security/detect-non-literal-fs-filename
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if (!existsSync(filePath)) {
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return new NextResponse("Not found", { status: 404 });
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}
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// eslint-disable-next-line security/detect-non-literal-fs-filename
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const bytes = await readFile(filePath);
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const mime: Record<string, string> = {
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".png": "image/png",
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".jpg": "image/jpeg",
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".jpeg": "image/jpeg",
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".gif": "image/gif",
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".webp": "image/webp",
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".svg": "image/svg+xml",
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".bmp": "image/bmp",
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};
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return new NextResponse(bytes, {
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headers: {
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// eslint-disable-next-line security/detect-object-injection -- ext validated against ALLOWED_EXT
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"Content-Type": mime[ext] ?? "application/octet-stream",
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"X-Content-Type-Options": "nosniff",
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...(ext === ".svg"
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? {
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"Content-Security-Policy":
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"sandbox; default-src 'none'; style-src 'unsafe-inline'",
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}
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: {}),
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"Cache-Control": "public, max-age=3600, must-revalidate",
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},
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});
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}
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