angular2:如何在保持重定向网址的同时获取CanLoad保护的完整路径

Question

我使用角2.4版和路由器版"^ 3.4.10".

我正在尝试使用auth guard服务来处理重定向url.

当用户点击url'domain/assignment/3/detail'并且如果用户没有登录,则用户重定向到'domain/login'页面.当用户成功登录系统,然后重定向到用户尝试访问的"domain/assignment/3/detail"前一个URL.

我在分配模块上实现了CanLoad guard.因此,当用户尝试访问url'domain/assignment/3/detail'并且如果用户未登录时,url将存储到authservice(this.authService.redirectUrl)的redirectUrl属性中.

所以问题来自于我的情况.我无法获得用户点击的网址的完整路径.我在CanLoad后卫中获得"任务"而非"任务/ 3 /细节".我怎样才能获得完整路径,以便我可以将用户重定向到CanLoad后卫内的正确路径.

CanLoad:

 canLoad(route: Route): boolean {

            let url = `/${route.path}`; // here i got url path 'assignment' instead 'assignment/3/detail'

            return this.checkLogin(url);
        }

主要路由 app.routes.ts

const routes: Routes = [
{ path: '', redirectTo: 'login', pathMatch: 'full' },
{ path: 'login', component: LoginComponent},
{
    path: 'assignment',
    loadChildren: './assignment/assignment.module#AssignmentModule',
    canLoad: [AuthGuard]
},
{ path: '**', redirectTo: '', pathMatch: 'full' }];

分配路由: assignment-routing.ts

       const assignmentRoutes: Routes = [
        {
            path: '',
            component: AssignmentComponent,
            canActivate: [AuthGuard]
            children: [
                {
                    path: '',
                    canActivateChild: [AuthGuard],
                    children: [
                        {
                            path: ':assignmentId/detail', component: AssignmentDetailComponent,
                            canActivate: [AuthGuard]

                        }
                      ]
                  }]
         }];

AuthGuard:auth-gurad.service.ts

import { Injectable } from '@angular/core';
import {
    CanActivate, Router,
    ActivatedRouteSnapshot,
    RouterStateSnapshot,
    CanActivateChild,
    NavigationExtras,
    CanLoad, Route
} from '@angular/router';
import { AuthService } from './auth.service';

@Injectable()
export class AuthGuard implements CanActivate, CanActivateChild, CanLoad {
    constructor(private authService: AuthService, private router: Router) { }

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
        let url: string = state.url;
        return this.checkLogin(url);
    }

    canActivateChild(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
        return this.canActivate(route, state);
    }

    canLoad(route: Route): boolean {

        let url = `/${route.path}`; // here i got url path 'assignment' instead 'assignment/3/detail'

        return this.checkLogin(url);
    }



     checkLogin(url: string): boolean {
            if (this.authService.isLoggedIn) {
                if(this.authService.redirectUrl!=null){
                    let redirectUrl = this.authService.redirectUrl;
                    this.authService.redirectUrl = null;
                    this.this.router.navigate([redirectUrl]);
                }
                return true;
                }

        // Store the attempted URL for redirecting
        this.authService.redirectUrl = url;

        // Navigate to the login page 
        this.router.navigate(['/login']);

        return false;
    }
}

Answer 1

如果您看一下canLoad方法的签名，则segments可以使用第二个参数来生成url。

canLoad(route: Route, segments: UrlSegment[]): Observable<boolean> | Promise<boolean> | boolean

您可以使用以下代码生成完整路径：

canLoad(route: Route, segments: UrlSegment[]): boolean {

  const fullPath = segments.reduce((path, currentSegment) => {
    return `${path}/${currentSegment.path}`;
  }, '');

  console.log(fullPath);

}

注意：使用此方法，您将获得完整路径，但不会获得任何查询参数。

Answer 2

我有这个完全相同的问题。这些问题相关

• https://github.com/angular/angular/issues/17359
• https://github.com/angular/angular/issues/12411

他们甚至对此都有一个公开的PR，尚未合并

• https://github.com/angular/angular/pull/13127

现在的解决方法似乎是用替换该canLoad方法，在canActivate那里您可以访问完整路径，当然不好的是您正在加载模块

编辑：同样为您分配路由，没有必要canActivate为每个子路由调用。在父路由上定义它后，应对所有子路由应用保护措施。

Answer 3

github问题上的这个回复的解决方法对我来说非常有效。

export class AuthnGuard implements CanLoad {
  constructor(private authnService: AuthnService, private router: Router) { }

  canLoad( ): Observable<boolean> | Promise<boolean> | boolean {
    const navigation = this.router.getCurrentNavigation();
    let url = '/';

    if (navigation) {
      url = navigation.extractedUrl.toString();
    }
    this.authnService.storeRedirectUrl(url);