vue+element+oss实现前端分片上传和断点续传

<template>
 <div class="dashboard-editor-container">
 <el-upload
  class="upload-demo"
  action=""
  ref="upload"
  :file-list="fileList"
  :limit="2"
  :on-change="handleChange"
  :on-remove="handleRemove"
  :auto-upload="false"
  accept=""
 >
  <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
  <el-button style="margin-left: 10px;" size="small" type="success" @click="submitForm">上传到服务器</el-button>
  <el-button style="margin-left: 10px;" size="small" type="success" @click="resumeUpload">继续</el-button>
  <el-button style="margin-left: 10px;" size="small" type="success" @click="stopUplosd">暂停</el-button>
  <el-button style="margin-left: 10px;" size="small" type="success" @click="abortMultipartUpload">清除切片</el-button>
 </el-upload>
 <el-progress :percentage="percentage" :status="uploadStatus"></el-progress>
 </div>
</template>
<script>
 let OSS = require('ali-oss') // 引入ali-oss插件
 const client = new OSS({
 region: 'oss-cn-shanghai',//根据那你的Bucket地点来填写
 accessKeyId: 'LTA*********RaXY',//自己账户的accessKeyId
 accessKeySecret: 'uu1************GiS',//自己账户的accessKeySecret
 bucket: 'a******o',//bucket名字
 });
export default {
 data () {
 return {
  fileList:[],
  file: null,
  tempCheckpoint: null, // 用来缓存当前切片内容
  uploadId: '',
  uploadStatus: null, // 进度条上传状态
  percentage: 0, // 进度条百分比
  uploadName: '', //Object所在Bucket的完整路径
 }
 },
 mounted() {
 // window.addEventListener('online', this.resumeUpload);
 },
 methods: {
 // 点击上传至服务器
 submitForm(file) {
  this.multipartUpload();
 },
 // 取消分片上传事件
 async abortMultipartUpload() {
  window.removeEventListener('online', this.resumeUpload)
  const name = this.uploadName; // Object所在Bucket的完整路径。
  const uploadId = this.upload; // 分片上传uploadId。
  const result = await client.abortMultipartUpload(name, uploadId);
  console.log(result, '=======清除切片====');
 },
 // 暂停分片上传。
 stopUplosd () {
  window.removeEventListener('online', this.resumeUpload) // 暂停时清除时间监听
  let result = client.cancel();
  console.log( result, '---------暂停上传-----------')
 },
 // 切片上传
 async multipartUpload () {
  if (!this.file) {
  this.$message.error('请选择文件')
  return
  }
  this.uploadStatus = null
  // console.log("this.uploadStatus",this.file, this.uploadStatus);
  this.percentage = 0
  try {
  //object-name可以自定义为文件名（例如file.txt）或目录（例如abc/test/file.txt）的形式，实现将文件上传至当前Bucket或Bucket下的指定目录。
  let result = await client.multipartUpload(this.file.name, this.file, {
   headers: {
   'Content-Disposition': 'inline',
   'Content-Type': this.file.type //注意：根据图片或者文件的后缀来设置，我试验用的‘.png'的图片，具体为什么下文解释
   },
   progress: (p, checkpoint) => {
   this.tempCheckpoint = checkpoint;
   this.upload = checkpoint.uploadId
   this.uploadName = checkpoint.name
   this.percentage = p * 100
   // console.log(p, checkpoint, this.percentage, '---------uploadId-----------')
   // 断点记录点。浏览器重启后无法直接继续上传，您需要手动触发上传操作。
   },
   meta: { year: 2020, people: 'dev' },
   mime: this.file.type
  });
  console.log(result, this.percentage, 'result= 切片上传完毕=');
  } catch (e) {
  window.addEventListener('online', this.resumeUpload) // 该监听放在断网的异常处理
  // 捕获超时异常。
  if (e.code === 'ConnectionTimeoutError') { // 请求超时异常处理
   this.uploadStatus = 'exception'
   console.log("TimeoutError");
   // do ConnectionTimeoutError operation
  }
  // console.log(e)
  }
 },
 // 恢复上传。
 async resumeUpload () {
  window.removeEventListener('online', this.resumeUpload)
  if (!this.tempCheckpoint) {
  this.$message.error('请先上传')
  return
  }
  this.uploadStatus = null
  try {
  let result = await client.multipartUpload(this.file.name, this.file, {
   headers: {
   'Content-Disposition': 'inline',
   'Content-Type': this.file.type //注意：根据图片或者文件的后缀来设置，我试验用的‘.png'的图片，具体为什么下文解释
   },
   progress: (p, checkpoint) => {
   this.percentage = p * 100
   console.log(p, checkpoint, 'checkpoint----恢复上传的切片信息-------')
   this.tempCheckpoint = checkpoint;
   },
   checkpoint: this.tempCheckpoint,
   meta: { year: 2020, people: 'dev' },
   mime: this.file.type
  })
  console.log(result, 'result-=-=-恢复上传完毕')
  } catch (e) {
  console.log(e, 'e-=-=-');
  }
 },
 // 选择文件发生改变
 handleChange(file, fileList) {
  this.fileList = fileList.filter(row => row.uid == file.uid)
  this.file = file.raw
  // 文件改变时上传
  // this.submitForm(file)
 },
 handleRemove(file, fileList) {
  this.percentage = 0 //进度条置空
  this.fileList = []
 },
 }
}
</script>
<style scoped>
</style>

 const client = new OSS({
 region: 'oss-cn-shanghai',//根据那你的Bucket地点来填写
 accessKeyId: 'LT******XY',//自己账户的accessKeyId
 accessKeySecret: 'uu*********GiS',//自己账户的accessKeySecret
 bucket: 'a******io',//bucket名字
 });

headers: {
   'Content-Disposition': 'inline',
   'Content-Type': this.file.type //注意：根据图片或者文件的后缀来设置，我取得是文件的type，具体为什么下文解释
   },