feat: show login error message; add request timeout & network guard; silence NavigationDuplicated

src/view/login/login.vue

@@ -47,7 +47,8 @@
         'getUserInfo'
       ]),
       handleSubmit({username, password}) {
-        var ip = returnCitySN["cip"]
+        // returnCitySN 由 index.html 引用的第三方脚本定义，可能加载失败，需兜底
+        var ip = (typeof returnCitySN !== 'undefined' && returnCitySN) ? returnCitySN["cip"] : ''
         this.$refs.loginForm.loading = true
         this.handleLogin({username, password, ip}).then(res => {
           setTimeout(() => {
@@ -56,7 +57,14 @@
               name: this.$config.homeName
             })
           }, 400)
-
+        }).catch(err => {
+          // 登录失败 / 后端不可用 / 请求超时统一在此提示，并复位按钮 loading
+          this.$refs.loginForm.loading = false
+          let msg = (err && err.message) ? err.message : ''
+          if (!msg || msg.indexOf('Network Error') > -1 || msg.indexOf('timeout') > -1 || msg.indexOf('ECONNABORTED') > -1) {
+            msg = '网络异常或服务不可用，请稍后重试'
+          }
+          this.$Message.error(msg)
         })
       }
     }