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import { NextRequest, NextResponse } from 'next/server';
import { mkdir, writeFile, appendFile } from 'fs/promises';
import path from 'path';
import crypto from 'crypto';
export async function POST(request: NextRequest) {
try {
const formData = await request.formData();
const chunk = formData.get('chunk') as File;
const filename = formData.get('filename') as string;
const chunkIndex = parseInt(formData.get('chunkIndex') as string);
const totalChunks = parseInt(formData.get('totalChunks') as string);
const fileId = formData.get('fileId') as string;
if (!chunk || !filename || isNaN(chunkIndex) || isNaN(totalChunks) || !fileId) {
return NextResponse.json({ success: false, error: '필수 매개변수가 누락되었습니다' }, { status: 400 });
}
// 임시 디렉토리 생성
const tempDir = path.join(process.cwd(), 'temp', fileId);
await mkdir(tempDir, { recursive: true });
// 청크 파일 저장
const chunkPath = path.join(tempDir, `chunk-${chunkIndex}`);
const buffer = Buffer.from(await chunk.arrayBuffer());
await writeFile(chunkPath, buffer);
// 마지막 청크인 경우 모든 청크를 합쳐 최종 파일 생성
if (chunkIndex === totalChunks - 1) {
const uploadDir = path.join(process.cwd(), "public", "basicContract", "template");
await mkdir(uploadDir, { recursive: true });
// 파일명 생성
const timestamp = Date.now();
const randomHash = crypto.createHash('md5')
.update(`${filename}-${timestamp}`)
.digest('hex')
.substring(0, 8);
const hashedFileName = `${timestamp}-${randomHash}${path.extname(filename)}`;
const finalPath = path.join(uploadDir, hashedFileName);
// 모든 청크 병합
await writeFile(finalPath, Buffer.alloc(0)); // 빈 파일 생성
for (let i = 0; i < totalChunks; i++) {
const chunkData = await require('fs/promises').readFile(path.join(tempDir, `chunk-${i}`));
await appendFile(finalPath, chunkData);
}
// 임시 파일 정리 (비동기로 처리)
require('fs/promises').rm(tempDir, { recursive: true, force: true })
.catch((e: unknown) => console.error('청크 정리 오류:', e));
return NextResponse.json({
success: true,
fileName: filename,
filePath: `/basicContract/template/${hashedFileName}`
});
}
return NextResponse.json({
success: true,
chunkIndex,
message: `청크 ${chunkIndex + 1}/${totalChunks} 업로드 완료`
});
} catch (error) {
console.error('청크 업로드 오류:', error);
return NextResponse.json({ success: false, error: '서버 오류' }, { status: 500 });
}
}
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