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path: root/app/api/dolce/download/route.ts
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import { NextRequest, NextResponse } from "next/server";
import { downloadDolceFile, downloadLocalFile } from "@/lib/dolce-v2/actions";

export async function POST(request: NextRequest) {
  try {
    const body = await request.json();
    const { fileId, userId, fileName } = body;

    if (!fileId || !userId || !fileName) {
      return NextResponse.json(
        { error: "필수 파라미터가 누락되었습니다" },
        { status: 400 }
      );
    }

    console.log("[DOLCE Download API] 요청:", { fileId, userId, fileName });

    // 로컬 파일 다운로드 처리
    if (String(fileId).startsWith("LOCAL_")) {
        const { buffer, fileName: localFileName } = await downloadLocalFile(fileId);
        
        return new NextResponse(buffer, {
          headers: {
            "Content-Type": "application/octet-stream",
            "Content-Disposition": `attachment; filename*=UTF-8''${encodeURIComponent(localFileName)}`,
            "Content-Length": buffer.byteLength.toString(),
          },
        });
    }

    // DOLCE API를 통해 파일 다운로드
    const { blob, fileName: downloadFileName } = await downloadDolceFile({
      fileId,
      userId,
      fileName,
    });

    // ArrayBuffer로 변환하여 Response 생성
    const arrayBuffer = await blob.arrayBuffer();
    
    return new NextResponse(arrayBuffer, {
      headers: {
        "Content-Type": "application/octet-stream",
        "Content-Disposition": `attachment; filename*=UTF-8''${encodeURIComponent(downloadFileName)}`,
        "Content-Length": arrayBuffer.byteLength.toString(),
      },
    });
  } catch (error) {
    console.error("파일 다운로드 API 오류:", error);
    return NextResponse.json(
      { error: error instanceof Error ? error.message : "파일 다운로드 중 오류가 발생했습니다" },
      { status: 500 }
    );
  }
}