14.oss上传封装

import axios from "axios";
import { getOssTicket } from "@/pages/mb/constants/API";
// 拿到ticket
const getTicket = function (): any {
  return new Promise((resolve, rejcet) => {
    getOssTicket({}).then(res => {
      resolve(res);
    }).catch(error => {
      rejcet(error);
    })
  })
}
// 上传
export const uploadPhoto = async function (neededObj: any, photos: any,cb:Function) {
  const { file } = neededObj;
  const data = await getTicket();
  if (file) {
    const uuid = getUuid();
    // 取最后一个（最新添加的）
    const fileItem = neededObj.fileList[neededObj.fileList.length - 1];
    const first = fileItem.file.name.lastIndexOf(".");
    const second = fileItem.file.name.length;
    // 取后缀名
    const postf = fileItem.file.name.substring(first, second);
    const filePathName = data.dir + uuid + postf;

    // 拿到上传完阿里云的返回信息
    let uploadRes = await handleMessage(data, filePathName, neededObj.fileList)
    // 这里返回一个promise，让外面调用的时候通过回调知道上传状态，做上传时候的显示交互（遮罩层上传中和关闭时机）
    return new Promise((resolve,reject)=> {
      // 如果状态码是200，说明上传阿里云成功了，然后把上传阿里云的这个路径通过回调函数传出去
      if(uploadRes.status===200){
        cb(filePathName);
        resolve(true)
      }
    })
  }
};
// 组织上传阿里云的数据
const handleMessage = function (needMessage: any, filePathName: any, listArr: any): any {
  let formData = new FormData();
  formData.append("key", filePathName); // OSS的保存路径
  formData.append("policy", needMessage.policy); // 策略
  formData.append("OSSAccessKeyId", needMessage.accessid); // OSS对象的标识
  formData.append("success_action_status", "200"); // 成功返回码
  formData.append("signature", needMessage.signature); // 签名
  formData.append("file", listArr[listArr.length - 1].file); // 图片文件，$(‘input[name="pic"]‘).files[0]
  return new Promise((reslove, rejcet) => {
    axios.post(needMessage.host, formData, {
      headers: {
        ‘x-oss-object-acl‘: ‘private‘
      },
    }).then(res => {
      reslove(res);
    }).catch(err=>{
      rejcet(err)
    })
  })
}
// 拼出不重复的数，为了确保图片不重复，也可以用时间戳
const S4 = function () {
  return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
}
const getUuid = function () {
  return (S4() + S4() + "-" + S4() + "-" + S4() + "-" + S4() + "-" + S4() + S4() + S4());
}