上傳二進位制檔案修改請求頭：Content-Type: application/octet-stream

<el-upload
     ref="upload"
     drag
     action="#"
     accept=".bin"
     :limit="1"
     :on-remove="remove_bin"
     :on-exceed="handleExceed"
     :on-change="handle_bin_change"
     :auto-upload="false"
    >
     <i class="el-icon-upload"
 
></i>
     <div class="el-upload__text">將檔案拖到此處，或<em>點選上傳</em></div>
     <div class="el-upload__tip" slot="tip">只可上傳一個.bin格式檔案</div>
    </el-upload>

// 超出上傳檔案數目的提示
  handleExceed() {
   return this.$message.warning('只能上傳一個檔案...')
  },
  // 移除檔案
  remove_bin() {
   
 
this.body = ''
   this.headers.type = ''
  },
  // 檔案改變時變化
  handle_bin_change(file, fileList) {this.uploadImgToBase64(file.raw).then(data => {
　  // 此時的 data.result 為 base64 型別資料
    this.body = this.convertImgDataToBlob(data.result) // body 為轉化後的二進位制資料
   })
  },
  // 將.bin轉為base64
  uploadImgToBase64(file) {
   
 
// 核心方法，轉成base64字串形式
   return new Promise((resolve, reject) => {
    const reader = new FileReader()
    reader.readAsDataURL(file)
    reader.onload = function() {
     // 圖片轉base64完成後返回reader物件
     resolve(reader)
    }
    reader.onerror = reject
   })
  },
  // 轉為二進位制
  convertImgDataToBlob(base64Data) {
   var format = 'bin' // 隨自己的檔案型別修改
   var base64 = base64Data
   var code = window.atob(base64.split(',')[1])
   var aBuffer = new window.ArrayBuffer(code.length)
   var uBuffer = new window.Uint8Array(aBuffer)
   for (var i = 0; i < code.length; i++) {
    uBuffer[i] = code.charCodeAt(i) & 0xff
   }
   var blob = null
   try {
    blob = new Blob([uBuffer], {
     type: format,
    })
   } catch (e) {
    window.BlobBuilder =
     window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder
    if (e.name == 'TypeError' && window.BlobBuilder) {
     var bb = new window.BlobBuilder()
     bb.append(uBuffer.buffer)
     blob = bb.getBlob('bin')
    } else if (e.name == 'InvalidStateError') {
     blob = new Blob([aBuffer], {
      type: format,
     })
    } else {
    }
   }
   return blob
  },