前端上传阿里云后解析文件，获取宽高时长等信息传给后端

export function fileHandle(ossInfo, response, file, type) {
  let path = `http://${ossInfo.data.bucket}.oss-cn-shenzhen.aliyuncs.com/${response.name}`  //文件线上地址
  let visit_screen_shot = path + '?x-oss-process=video/snapshot,t_1000,f_jpg,w_0,h_0'  //阿里云文件截图
  let url = URL.createObjectURL(file.file);
  let audioElement = new Audio(url);
  let img = new Image()

  return new Promise(resolve => {
    if (type == 1) {
      audioElement.addEventListener("loadedmetadata",()=> {
        // 获取上传的视频的宽高
        let video = document.createElement("video");
        video.src = url;
        video.onloadedmetadata = ()=> {
          URL.revokeObjectURL(url);  //释放当前视频对象
          response.visit_screen_shot = visit_screen_shot
          response.visit_path = path
          response.video = response.name
          response.width = video.videoWidth
          response.height = video.videoHeight
          response.duration = audioElement.duration;
          //获取成功后返回结果
          resolve(response)
        };
      });
    }else {
      img.src = path
      img.onload = ()=> {
        response.visit_screen_shot = path
        response.path = response.name
        response.width = img.width
        response.height = img.height
        resolve(response)
      };
    }
  }).catch(error=> {
    console.log(error);
  })
}