[代码优化](v2.6)：修复 responseType 为 blob 时无法解析后台返回的错误信息

close https://github.com/elunez/eladmin/issues/524

src/utils/request.js

@@ -22,8 +22,6 @@ service.interceptors.request.use(
     return config
   },
   error => {
-    // Do something with request error
-    console.log(error) // for debug
     Promise.reject(error)
   }
 )
@@ -31,17 +29,21 @@ service.interceptors.request.use(
 // response 拦截器
 service.interceptors.response.use(
   response => {
-    const code = response.status
-    if (code < 200 || code > 300) {
-      Notification.error({
-        title: response.message
-      })
-      return Promise.reject('error')
-    } else {
     return response.data
-    }
   },
   error => {
+    // 兼容blob下载出错json提示
+    if (error.response.data instanceof Blob && error.response.data.type.toLowerCase().indexOf('json') !== -1) {
+      const reader = new FileReader()
+      reader.readAsText(error.response.data, 'utf-8')
+      reader.onload = function(e) {
+        const errorMsg = JSON.parse(reader.result).message
+        Notification.error({
+          title: errorMsg,
+          duration: 5000
+        })
+      }
+    } else {
       let code = 0
       try {
         code = error.response.data.status
@@ -54,6 +56,7 @@ service.interceptors.response.use(
           return Promise.reject(error)
         }
       }
+      console.log(code)
       if (code) {
         if (code === 401) {
           store.dispatch('LogOut').then(() => {
@@ -78,6 +81,7 @@ service.interceptors.response.use(
           duration: 5000
         })
       }
+    }
     return Promise.reject(error)
   }
 )