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butcem/src/app/api/files/[id]/route.ts
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import type { NextRequest } from "next/server";
import { readAttachmentForUser } from "@/features/attachments/service";
import { getCurrentUser } from "@/lib/dal";
/**
* GET /api/files/:id[?v=thumb][&indir=1] — oturum ve hane yetkisi kontrol edilerek ek dosyayı
* servis eder. Erişim yoksa (başka hane, gizli hesap, silinmiş kayıt) 404: varlık sızdırılmaz.
*/
export async function GET(request: NextRequest, ctx: RouteContext<"/api/files/[id]">) {
const user = await getCurrentUser();
if (!user) return new Response(null, { status: 401 });
const { id } = await ctx.params;
const params = request.nextUrl.searchParams;
const file = await readAttachmentForUser(
user.id,
id,
params.get("v") === "thumb" ? "thumb" : "full",
);
if (!file) return new Response(null, { status: 404 });
const disposition = params.get("indir") === "1" ? "attachment" : "inline";
const fallbackName = file.mimeType === "application/pdf" ? "belge.pdf" : "gorsel.webp";
const name = toServedName(file.name || fallbackName, file.mimeType);
return new Response(new Uint8Array(file.bytes), {
headers: {
"Content-Type": file.mimeType,
"Content-Length": String(file.bytes.length),
"Content-Disposition": `${disposition}; filename="${asciiName(name)}"; filename*=UTF-8''${encodeURIComponent(name)}`,
// Yalnızca kullanıcının tarayıcısında; paylaşılan önbelleklere girmez.
"Cache-Control": "private, max-age=3600",
"X-Content-Type-Options": "nosniff",
},
});
}
/** Görseller WebP'ye çevrildiği için indirilen adın uzantısı içerikle uyumlu olsun. */
function toServedName(name: string, mimeType: string): string {
const ext = mimeType === "application/pdf" ? ".pdf" : ".webp";
return name.replace(/\.[a-z0-9]{1,5}$/i, "") + ext;
}
function asciiName(name: string): string {
return (
name
.normalize("NFKD")
.replace(/[^\x20-\x7e]/g, "")
.replace(/["\\]/g, "") || "dosya"
);
}