nowwa-system/vue-admin-template-master/src/permission.js

import router from "./router";
import store from "./store";
import NProgress from "nprogress"; // progress bar
import "nprogress/nprogress.css"; // progress bar style
import { getToken } from "@/utils/auth"; // get token from cookie
import getPageTitle from "@/utils/get-page-title";

NProgress.configure({ showSpinner: false }); // NProgress Configuration

const whiteList = ["/login"]; // no redirect whitelist

router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start();

  // set page title
  document.title = getPageTitle(to.meta.title);

  // determine whether the user has logged in
  const hasToken = getToken();
  console.log(hasToken);

  if (!!hasToken && typeof hasToken == "string") {
    if (to.path === "/login") {
      // if is logged in, redirect to the home page
      next({ path: "/" });
      NProgress.done();
    } else {
      const hasRoles = store.getters.roles && store.getters.roles.length > 0;
      if (hasRoles) {
        next();
      } else {
        const roles = await store.dispatch("user/setroles");
        store.dispatch("GenerateRoutes", { roles }).then(() => {
          // 生成可访问的路由表
          router.options.routes = store.getters.addRouters;
          router.addRoutes(store.getters.addRouters); // 动态添加可访问路由表
          next({ ...to, replace: true }); // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
        });
      }

      // next()
      // const hasGetUserInfo = store.getters.name
      // if (hasGetUserInfo) {
      //   next()
      // } else {
      //   try {
      //     // get user info
      //     await store.dispatch('user/getInfo')

      //     next()
      //   } catch (error) {
      //     // remove token and go to login page to re-login
      //     await store.dispatch('user/resetToken')
      //     Message.error(error || 'Has Error')
      //     next(`/login?redirect=${to.path}`)
      //     NProgress.done()
      //   }
      // }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next();
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`);
      NProgress.done();
    }
  }
});

router.afterEach(() => {
  // finish progress bar
  NProgress.done();
});