Angular 2 authguard相对重定向

Question

有没有办法在authguard中使用相对路径模式重定向？

我试过了

@Injectable()
export class ServerAuthGuard implements CanActivate {
    constructor(private _router: Router,
                private _route: ActivatedRoute) {
    }

    canActivate(route: ActivatedRouteSnapshot): boolean {
        this._router.navigate(['../../servers/'], {relativeTo: this._route});

        return false;
    }
}

它应该重定向/projects/2/servers/71到/projects/2/servers/但它总是将其重定向到/servers(当我在一个组件中做同样的工作时它工作正常).

Answer 1

我用一个小辅助函数解决了这个问题。但这仅在您知道 url 的架构时才有效。

/**
 * ATTENTION: RECURSIVE
 *
 * We are searching for the url "searchString" which comes before
 * the parameter we are really search.
 * E.g. if you have a url like "projects/:projectId/servers/:serverId
 * and you need the :projectId your 'searchString' is 'servers'
 */
function getUrlParameterByChild(searchString: string,
                                route: ActivatedRouteSnapshot,
                                next: boolean = false): string {
    let url: string = route.url[0] ? route.url[0].path : '';

    if (!url && !route.parent) {
        throw new Error('Parameter not found in url');
    }

    if (next) {
        return url;
    }

    return getUrlParameterByChild(searchString, route.parent, url === searchString);
}

用法：

this._router.navigate([
    'projects',
    getUrlParameterByChild('servers', route),
    'servers'
])