Nestjs 上传文件到七牛云

$ npm install qiniu

import * as url from 'url';
import * as qiniu from 'qiniu';

  @Post('upload')
  @UseInterceptors(FileInterceptor('file'))
  async uploadIcon(@UploadedFile() file: Express.Multer.File) {
    // get token
    const mac = new qiniu.auth.digest.Mac(process.env.qn_ak, process.env.qn_sk);
    const putPolicy = new qiniu.rs.PutPolicy({
      scope: process.env.qn_scope,
    });
    const uploadToken = putPolicy.uploadToken(mac);
    
    // uoload
    const formUploader = new qiniu.form_up.FormUploader(
      new qiniu.conf.Config({
        zone: qiniu.zone.Zone_z2,
      }),
    );

    return new Promise((_res, _rej) => {
      formUploader.put(
        uploadToken,
        `${Date.now()}-${file.originalname}`,
        file.buffer,
        new qiniu.form_up.PutExtra(),
        function (respErr, respBody, respInfo) {
          if (respErr) {
            console.error(respErr);
            throw new InternalServerErrorException(respErr.message);
          }

          if (respInfo.statusCode == 200) {
            _res({
              url: new url.URL(respBody.key, process.env.qn_host).href,
            });
          } else {
            console.error(respInfo.statusCode, respBody);
            throw new InternalServerErrorException(respInfo);
          }
        },
      );
    });
  }