Nestjs busboy接收到文件后出现enoint错误

我正在处理一个遗留项目，其中MP4文件从带有

axios

的React应用程序逐个上传到EC2实例上带有

busboy

的NestJS API。然后，文件被上传到S3存储桶

当AWS S3库尝试加载文件时，有时会出现明显的“随机”错误：

 warn
 module: videoservice
 method: saveTostream
 message: Error on Upload Success callback
 { [Error: ENOENT: no such file or directory, open 'file.mp4'] errno: -2, code: 'ENOENT', syscall: 'open', path: 'file.mp4' }

 (node:26886) UnhandledPromiseRejectionWarning: Error: ENOENT: no such file or directory, open 'file.mp4'
 (node:26886) UnhandledPromiseRejectionwarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catc h(). (rejection id: 20)

以下是片段：

API上载端点

  @Post('upload/:id')
  @ApiOperation({ ... })
  @ApiResponse({ status: 201, type: Video })
  @ApiConsumes('multipart/form-data')
  @ApiImplicitFile({ name: 'file', required: true })
  @ApiCreatedResponse({ type: UploadResponseDto })
  async upload(
    @Decoded() decoded: any,
    @Param('id') videoId: number,
    @Query('fileSize') fileSize :number,
    @Req() req: Request,
    @Res() res: Response,
    @Body() uploadDto: UploadDto,
  ): Promise<any> {
    try {
      const busboy = new Busboy({
        headers: req.headers,
      });

      const data = new Map();
      const writtenFiles = [];
      let upload;

      busboy.on('field', (fieldname, val) => {
        data.set(fieldname, val);
      });

      busboy.on(
        'file',
        async (fieldname, file, filename, encoding, mimetype) => {
          try {
            data.set('filename', filename);
            data.set('mimetype', mimetype);
            data.set('encoding', encoding);

            const filepath = path.join(fieldname + path.extname(filename));
            upload = filepath;

            const writeStream = fs.createWriteStream(filepath);
            file.pipe(writeStream);

            const promise = new Promise((resolve, reject) => {
              file.on('end', () => {
                writeStream.end();
              });
              writeStream.on('finish', resolve);
              writeStream.on('error', reject);
            });
    
            writtenFiles.push(promise);
          } catch (err) {
            this.logger.error(log('busboy on file', err.message));
            return res.status(HttpStatus.INTERNAL_SERVER_ERROR).send({
              statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
              message: err.message,
            });
          }
        },
      );

      busboy.on('error', err => {
        this.logger.warn(log('busboy on error', err.message));
      });

      busboy.on('finish', async () => {
        await Promise.all(writtenFiles);
        res.status(HttpStatus.CREATED).send('OK');

        await this.bucketService.saveStream( // Next snippet
          fs.createReadStream(upload),
          data.get('filename'),
          data.get('mimetype'),
          data.get('fileSize'),
          +data.get('programId'),
          +data.get('videoId')
        );
        return;
        fs.unlinkSync(upload);
      });

      req.pipe(busboy);
    } catch (err) {
      this.logger.error(log('catch', err.message));
      return res.status(HttpStatus.INTERNAL_SERVER_ERROR).send({
        statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
        message: err.message,
      });
    }
  }

在某个时刻，我认为这可能是因为EC2上的临时文件的名称总是相同的：

file.mp4

，当两个文件同时上载时，完成时的第一个文件会删除该文件（

fs.unlinkSync（upload）；

在端点上），而另一个正在进行的进程则没有它，因此，当尝试上载时，此进程将找不到它。但事实并非如此，因为我进行了测试，确保文件一个接一个地上传。但是，我还通过在控制器上更改来确保名称始终不同：

constfilepath=path.join（fieldname+path.extname（filename））

借

constfilepath=path.join（Math.floor（Math.random（）*10000）+path.extname（filename））

但错误仍在发生。发生的另一件奇怪的事情是，在我的机器中，我可以看到（
ls
）上传的文件，但在EC2中却看不到

事实：


EC2:t2.xlarge（大约免费4GB）


操作系统：Ubuntu18


节点版本：10.21.0


平均文件大小：2GB


依赖关系

 "archiver": "^3.1.1",
 "async-busboy": "^0.7.0",
 "aws-sdk": "^2.553.0",
 "axios": "^0.19.0",
 "body-parser": "^1.19.0",
 "busboy": "^0.3.1",



 "archiver": "^3.1.1",
 "async-busboy": "^0.7.0",
 "aws-sdk": "^2.553.0",
 "axios": "^0.19.0",
 "body-parser": "^1.19.0",
 "busboy": "^0.3.1",