fix(view): 设置超时后重新发起请求

后台登录页获取极验的接口易超时，影响用户登录体验，因此需要超时后重新发起请求处理

Author: lisgroup

admin/src/utils/request.js

@@ -6,7 +6,9 @@ import { getToken } from '@/utils/auth'
 // 创建axios实例
 const service = axios.create({
   baseURL: process.env.BASE_API, // api 的 base_url
-  timeout: 5000 // 请求超时时间
+  timeout: 5000, // 请求超时时间
+  retry: 3, // 全局的请求次数，请求的间隙
+  retryDelay: 300
 })
 
 // request拦截器
@@ -62,12 +64,39 @@ service.interceptors.response.use(
   },
   error => {
     console.log('err' + error) // for debug
-    Message({
-      message: error.message,
-      type: 'error',
-      duration: 5 * 1000
+    const config = error.config
+    console.log(config)
+    // If config does not exist or the retry option is not set, reject
+    if (!config || !config.retry) return Promise.reject(error)
+
+    // Set the variable for keeping track of the retry count
+    config.__retryCount = config.__retryCount || 0
+
+    // Check if we've maxed out the total number of retries
+    if (config.__retryCount >= config.retry) {
+      // Reject with the error
+      Message({
+        message: error.message,
+        type: 'error',
+        duration: 5 * 1000
+      })
+      return Promise.reject(error)
+    }
+
+    // Increase the retry count
+    config.__retryCount += 1
+
+    // Create new promise to handle exponential backoff
+    const backoff = new Promise(function(resolve) {
+      setTimeout(function() {
+        resolve()
+      }, config.retryDelay || 1)
+    })
+
+    // Return the promise in which recalls axios to retry the request
+    return backoff.then(function() {
+      return axios(config)
     })
-    return Promise.reject(error)
   }
 )