vue3.0上传图片到oss并回显

oss封装

import axios from 'axios'
export default function () {
  async function uploadAlioss(event, jj) {
    let file;
    if (jj === 1) {
      file = event
    } else {
      file = event.target.files[0];
    }
    let sing = await getOssSign()
    console.log(sing, "=====")
    const formData = new FormData();
    const suffix = get_suffix(file.name);
    const g_object_name = sing.dir + random_string(10) + suffix;
    formData.append("key", g_object_name);
    formData.append("OSSAccessKeyId", sing.accessid);
    formData.append("policy", sing.policy);
    formData.append("signature", sing.signature);
    // 上传成功返回的状态码，不设置则是204
    formData.append("success_action_status", "200"); 
    formData.append("file", file); // 一定在最后
    console.log(sing.host)
    return new Promise(async (resolve, reject) => {
      await axios.post(sing.host, formData)
        .then((res) => {
          console.log(res)
          console.log(sing.host + "/" + g_object_name);
          resolve(sing.host + "/" + g_object_name);
        })
        .catch((error) => {
          reject(error);
        });
    });
  }

  async function getOssSign() {
    return new Promise(async (resolve) => {
      await axios.get(
        "url" // 获取服务端签名的URL
      ).then((res) => {
        resolve(res.data)
        console.log(resolve(res.data))
      })
    })
  }

  function random_string(len) {
    len = len || 32;
    var chars = "ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678";
    var maxPos = chars.length;
    var pwd = "";
    for (let i = 0; i < len; i++) {
      pwd += chars.charAt(Math.floor(Math.random() * maxPos));
    }
    return pwd;
  }

  function get_suffix(filename) {
    let pos = filename.lastIndexOf(".");
    let suffix = "";
    if (pos != -1) {
      suffix = filename.substring(pos);
    }
    return suffix;
  }
  return {
    uploadAlioss,
    getOssSign,
    random_string,
    get_suffix
  }
}

vue代码

import alios from "@/mixins/alios";

<input
  type="file"
  name="上传图片"
  id="collocationfiles"
  @change="uploadImage($event)"
  accept="image/*"
/>

setup() {
    // 上传图片
    const uploadPublic = alios ()
    const uploadImage = (event,) => {
      console.log(event)
      var files = document.getElementById('files').files;
      //这里做图片大小限制   
      const isLt2M = files[0].size / 1024 / 1024 < 20 
      uploadPublic.uploadAlioss(event).then((res) => {
        // 上传成功
        console.log(res,)
      });
    };
    return {
        uploadImage 
    }
}