纯前端实现: 切片上传 断点续传断点续传需要在切上上传的基础上实现

前端之前上传OSS,无需后端提供接口。先上完整代码,直接复制,将new OSS里的参数修改成自己公司OSS相关信息后可用,如遇问题,请继续往下看。

oss官方文档

代码允许所需环境:vue + element + ali-oss

  • 代码实现
<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>

如果相关依赖已经安装完毕,但是上述代码操作时仍有报错,请检查以下问题

  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
  });
  • 上述信息放在前端会存在安全问题,如在项目中使用尽量由后端接口提供。或使用STS临时授权。demo中没有,请自行探索。

vue+element+oss实现前端分片上传和断点续传-LMLPHP

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
          },

上述代码只是demo,代码以实现功能为主,并不严谨,请自行完善。如对各位有所帮助,请推荐,谢谢各位!。

以上就是全部内容,如有疑问,敬请留言!如有问题,请指出,谢谢~~

03-29 12:56