[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
     return config
   },
   },
   error => {
   error => {
-    // Do something with request error
-    console.log(error) // for debug
     Promise.reject(error)
     Promise.reject(error)
   }
   }
 )
 )
@@ -31,52 +29,58 @@ service.interceptors.request.use(
 // response 拦截器
 // response 拦截器
 service.interceptors.response.use(
 service.interceptors.response.use(
   response => {
   response => {
-    const code = response.status
-    if (code < 200 || code > 300) {
-      Notification.error({
-        title: response.message
-      })
-      return Promise.reject('error')
-    } else {
-      return response.data
-    }
+    return response.data
   },
   },
   error => {
   error => {
-    let code = 0
-    try {
-      code = error.response.data.status
-    } catch (e) {
-      if (error.toString().indexOf('Error: timeout') !== -1) {
+    // 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({
         Notification.error({
-          title: '网络请求超时',
+          title: errorMsg,
           duration: 5000
           duration: 5000
         })
         })
-        return Promise.reject(error)
       }
       }
-    }
-    if (code) {
-      if (code === 401) {
-        store.dispatch('LogOut').then(() => {
-          // 用户登录界面提示
-          Cookies.set('point', 401)
-          location.reload()
-        })
-      } else if (code === 403) {
-        router.push({ path: '/401' })
-      } else {
-        const errorMsg = error.response.data.message
-        if (errorMsg !== undefined) {
+    } else {
+      let code = 0
+      try {
+        code = error.response.data.status
+      } catch (e) {
+        if (error.toString().indexOf('Error: timeout') !== -1) {
           Notification.error({
           Notification.error({
-            title: errorMsg,
+            title: '网络请求超时',
             duration: 5000
             duration: 5000
           })
           })
+          return Promise.reject(error)
         }
         }
       }
       }
-    } else {
-      Notification.error({
-        title: '接口请求失败',
-        duration: 5000
-      })
+      console.log(code)
+      if (code) {
+        if (code === 401) {
+          store.dispatch('LogOut').then(() => {
+            // 用户登录界面提示
+            Cookies.set('point', 401)
+            location.reload()
+          })
+        } else if (code === 403) {
+          router.push({ path: '/401' })
+        } else {
+          const errorMsg = error.response.data.message
+          if (errorMsg !== undefined) {
+            Notification.error({
+              title: errorMsg,
+              duration: 5000
+            })
+          }
+        }
+      } else {
+        Notification.error({
+          title: '接口请求失败',
+          duration: 5000
+        })
+      }
     }
     }
     return Promise.reject(error)
     return Promise.reject(error)
   }
   }