使用axios获取接口返回二进制流进行文件下载

1、当接口返回值类型是'application/json'时，处理报错信息

1 if (response.data.type && response.data.type == 'application/json') {
2           let reader = new FileReader();
3           // 处理load事件。该事件在读取操作完成时触发
4           reader.onload = e => {
5             let res = JSON.parse(e.target.result);
6             _this.$message({ message: `${res.msg}`, type: "error", showClose: true     })
7           };
8           reader.readAsText(response.data);
9   }

2、当接口返回是二进制流时，处理：

let blob = new Blob([response.data], {
            type: `application/x-download`
})  
let href = window.URL.createObjectURL(blob)
         
let name = response.headers['content-disposition'].split(";")[1];
          
let fileName = name.split("=")[1];
          
let downloadElement = document.createElement('a')
          
downloadElement.href = href
          
downloadElement.download = decodeURI(fileName)
         
 document.body.appendChild(downloadElement)
          
downloadElement.click()
          
document.body.removeChild(downloadElement) // 下载完成除元素

3、完整代码