base64 转文件上传

// 将base64转换为blob
    dataURLtoBlob (dataurl) {
      let arr = dataurl.split(',')
      let mime = arr[0].match(/:(.*?);/)[1]
      let bstr = atob(arr[1]) // .replace(/%0A|\s/g, '')
      console.info('-----------123---------')
      let n = bstr.length
      let u8arr = new Uint8Array(n)
      while (n--) {
        u8arr[n] = bstr.charCodeAt(n)
      }
      return new Blob([u8arr], { type: mime })
    },
    // 将blob转换为file
    blobToFile (theBlob, fileName) {
      theBlob.lastModifiedDate = new Date()
      theBlob.name = fileName
      return theBlob
    },
    getBase64Mock () {
      return {
        'base64': 'data:image/png;base64,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',
        'key': '202172395245566',
        'fileName': '66' + Math.random() + '.jpg'
      }
    },
    base64UpFile (ctx, next) {
      let base64Arr = [this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock(),
        this.getBase64Mock()
      ]
      ctx.base64Arr = base64Arr
      ctx.index = 0

      base64Arr.forEach(item => {
        let formData = new FormData()
        let blob = this.dataURLtoBlob(item.base64)
        let file = this.blobToFile(blob, item.fileName)
        formData.append('file', file, item.fileName)

        this.$Spin2.show('图片上传中')
        axios.request({
          method: 'post',
          url: '/processFile/fileUpload',
          data: formData
        }).then(res => {
          return res.data
        }).then(res => {
          // console.info('axios res', res)

          const params = {
            reportingId: this.params.reportingId,
            typeCode: this.typeCode1,
            name: item.fileName,
            url: res.data.split('-')[0]
          }
          this.$api('/process-api/file/saveOne', params).then(res => {
            this.$Spin2.hide()
            if (res && res.status === 20) {
              // this.$Message.success('上传成功')
              ctx.index = ctx.index + 1
              next()
            }
          })
        })
      })
    },
    flushTree (ctx, next) {
      if (ctx.index === ctx.base64Arr.length) {
        this.$Message.success('上传成功')
        this.$refs.part1.init()
      }
    },
    base64ToFileHandle () {
      const ac = this.$getAc()
      ac.use(this.base64UpFile)
      ac.use(this.flushTree)
      ac.run()
    },