add file download

src/app/api/download/[id]/route.ts

@@ -0,0 +1,51 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getSessionData } from '@/app/actions/session';
+import { API_BASE_URL } from '@/app/actions/definitions';
+
+export async function GET(
+	request: NextRequest,
+	{ params }: { params: Promise<{ id: string }> }
+) {
+	try {
+		const token = await getSessionData('token');
+
+		if (!token) {
+			return NextResponse.json(
+				{ error: 'need authorization' },
+				{ status: 401 }
+			);
+		}
+
+		const { id } = await params;
+
+		const response = await fetch(`${API_BASE_URL}/api/v1/files/download/${id}`, {
+			method: 'GET',
+			headers: {
+				"Authorization": token
+			}
+		});
+
+		if (!response.ok) {
+			throw new Error(`backend error: ${response.status}`);
+		}
+
+		const fileBlob = await response.blob();
+		const headers = new Headers(response.headers);
+
+		return new NextResponse(fileBlob, {
+			status: 200,
+			headers: {
+				'Content-Type': headers.get('content-type') || 'application/octet-stream',
+				'Content-Disposition': headers.get('content-disposition') || `attachment; filename="file-${id}"`,
+				'Content-Length': headers.get('content-length') || String(fileBlob.size),
+			},
+		});
+
+	} catch (error) {
+		console.error('download error:', error);
+		return NextResponse.json(
+			{ error: 'download file error' },
+			{ status: 500 }
+		);
+	}
+}