下载失败bug

src/utils/request.js

@@ -37,6 +37,8 @@ service.interceptors.response.use(
     const errorMsg = response.data.message
     if (response.data.code === 200) {
       return response.data.data
+    } else if (response.data instanceof Blob) {
+      return response.data
     } else {
       Message.error({
         message: errorMsg,