fix:细微调整defHttp请求

 /**
  * custom http request
  */
-function DefHttp() {
+function createAxios(options) {
   /**
    * 创建实例
    */
   const instance = axios.create({
-    baseURL: DefHttp.baseURL,
-    timeout: DefHttp.timeout,
+    baseURL: options.baseURL,
+    timeout: options.timeout,
     headers: {
       "content-type": "application/json; charset=UTF-8",
-      "X-Authorization": "Bearer " + DefHttp.token,
+      "X-Authorization": "Bearer " + options.token,
     },
   });
   /**
@@ -18,17 +18,14 @@ function DefHttp() {
    */
   instance.interceptors.response.use(
     function (response) {
-      return response;
+      return response.data;
     },
     function (error) {
       if (error.response.status == 401) {
-        alert(error.response.data.message);
+        layer.alert('登录超时,请重新登录');
       }
       return Promise.reject(error);
     }
   );
   return instance;
 }
-DefHttp.timeout = 10 * 1000;
-DefHttp.token = "";
-DefHttp.baseURL = "/api/";