# DRF接口 + Vue实现下载文件

### 后端：django-drf

```python
# 下载代码

    @action(methods=['get'], detail=False)
    def download(self, request, *args, **kwargs):
        # 1 读取数据库数据
        obj_data = DmModel.objects.all()
        ws = xlwt.Workbook(encoding='utf-8')
        st = ws.add_sheet('sheet1')
        # 写标题行
        st.write(0, 0, 'ID')
        st.write(0, 1, '域名')
        st.write(0, 2, '访问量')
        st.write(0, 3, '跳转地址')
        st.write(0, 4, '域名组')
        st.write(0, 5, '添加时间')
        # 写入数据，从第一行开始
        excel_row = 1
        for obj in obj_data:
            st.write(excel_row, 0, obj.id)
            st.write(excel_row, 1, obj.domain)
            st.write(excel_row, 2, obj.looks)
            st.write(excel_row, 3, obj.rewrite_url)
            st.write(excel_row, 4, obj.group.group_name)
            st.write(excel_row, 5, str(obj.ct_time))
            excel_row += 1

        # 将数据写入io数据流，不用在本地生成excel文件，不然效率就低了
        output = BytesIO()
        ws.save(output)
        output.seek(0)
        # print(sio.getvalue())
        
        # 将excel数据响应回客户端
        response = HttpResponse(output.getvalue(), content_type='application/vnd.ms-excel')
        response['Content-Disposition'] = 'attachment; filename=xx.xls'
        response.write(output.getvalue())

        return response
```

### vue-admin-template

* 页面

```html
    <el-button type="primary" icon="el-icon-plus" @click="onDownload()"></el-button>


    // 导出执行函数
      onDownload() {
        getDmDownload().then(response => {
         var fileURL = window.URL.createObjectURL(new Blob([response]));
         var fileLink = document.createElement('a');
      
         fileLink.href = fileURL;
         fileLink.setAttribute('download', 'xx.xls');
         document.body.appendChild(fileLink);
       
         fileLink.click();
        })
      },
```

* 接口

```js
import request from '@/utils/request'

export function getDmDownload() {
  return request({
    url: '/v1/dm/download/',
    method: 'get',
    responseType: 'blob'
  })
}
```

### 参考： <https://www.cnblogs.com/clschao/articles/14302188.html>


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