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Angular4.x通过路由守卫进行路由重定向步骤详解

2020-11-27 来源:小奈知识网

这次给大家带来Angular4.x通过路由守卫进行路由重定向步骤详解,Angular4.x通过路由守卫进行路由重定向的注意事项有哪些,下面就是实战案例,一起来看一下。

需求:

最近在做一个网上商城的项目,技术用的是Angular4.x。有一个很常见的需求是:用户在点击“我的”按钮时读取cookie,如果有数据,则跳转到个人信息页面,否则跳转到注册或登录页面

解决

在这里通过Angular的路由守卫来实现该功能。

1. 配置路由信息

const routes = [
 { path: 'home', component: HomeComponent },
 { path: 'product', component: ProductComponent },
 { path: 'register', component: RegisterComponent },
 { path: 'my', component: MyComponent },
 { path: 'login', component: LoginComponent, canActivate: [RouteguardService] },//canActivate就是路由守卫
 { path: '', redirectTo: '/home', pathMatch: 'full' }
]

2. 路由守卫条件(RouteguardService.ts)

import { Injectable, Inject } from "@angular/core";
import { DOCUMENT } from "@angular/common";
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router, NavigationStart } from "@angular/router";
import userModel from "./user.model";
@Injectable()
export class RouteguardService implements CanActivate {
 constructor(private router: Router, @Inject(DOCUMENT) private document: any) {
 }
 canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
 // this.setCookie("userId", "18734132326", 10);
 //读取cookie
 var cookies = this.document.cookie.split(";");
 var userInfo = { userId: "", pw: "" };
 if (cookies.length > 0) {
 for (var cookie of cookies) {
 if (cookie.indexOf("userId=") > -1) {
 userModel.accout = cookie.split("=")[0];
 userModel.password = cookie.split("=")[1];
 userModel.isLogin = false;
 }
 }
 }
 //获取当前路由配置信息
 var path = route.routeConfig.path;
 if (path == "login") {
 if (!userModel.isLogin) {
 //读取cookie如果没有用户信息,则跳转到当前登录页
 return true;
 } else {
 //如果已经登录了则跳转到个人信息页面,下面语句是通过ts进行路由导航的
 this.router.navigate(['product'])
 }
 }
 }
 setCookie(cname, cvalue, exdays) {
 var d = new Date();
 d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
 var expires = "expires=" + d.toUTCString();
 document.cookie = cname + "=" + cvalue + "; " + expires;
 }
}

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