Angular 2 - Routing - CanActivate 与 Observable 一起工作 [英] Angular 2 - Routing - CanActivate work with Observable

问题描述

我有一个实现 CanActivate 的 AuthGuard(用于路由).

I have an AuthGuard (used for routing) that implements CanActivate.

canActivate() {
    return this.loginService.isLoggedIn();
}

我的问题是，CanActivate-result 依赖于 http-get-result - LoginService 返回一个 Observable.

My problem is, that the CanActivate-result depends on a http-get-result - the LoginService returns an Observable.

isLoggedIn():Observable<boolean> {
    return this.http.get(ApiResources.LOGON).map(response => response.ok);
}

我怎样才能将这些结合在一起 - 让 CanActivate 依赖于后端状态?

How can i bring those together - make CanActivate depend on a backend state?

请注意，这个问题来自 2016 年 - 角度/路由器的早期阶段已被使用.

推荐答案

你应该升级@angular/router"到最新.例如3.0.0-alpha.8"

You should upgrade "@angular/router" to the latest . e.g."3.0.0-alpha.8"

修改AuthGuard.ts

@Injectable()
export class AuthGuard implements CanActivate {
    constructor(private loginService: LoginService, private router: Router) {}

    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        return this.loginService
            .isLoggedIn()
            .map((e) => {
                if (e) {
                    return true;
                }
            })
            .catch(() => {
                this.router.navigate(['/login']);
                return Observable.of(false);
            });
    }
}

如果你有任何问题，问我！

If you have any questions, ask me！

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