Angular 角度2:返回可见光时的未捕获错误
我有以下代码:Angular 角度2:返回可见光时的未捕获错误,angular,observable,Angular,Observable,我有以下代码: import { Injectable } from '@angular/core'; import { Router, CanActivate } from '@angular/router'; import { Angular2TokenService } from 'angular2-token'; import { Observable } from 'rxjs/Observable'; import 'rxjs/add/operator/map'; import 'r
import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { Angular2TokenService } from 'angular2-token';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import 'rxjs/add/operator/catch';
@Injectable()
export class AuthGuard implements CanActivate {
constructor(
private _tokenService: Angular2TokenService,
private router: Router) {}
canActivate():Observable<boolean>|boolean {
return this._tokenService.validateToken().map(res => {
return res.json().success;
});
}
}
从'@angular/core'导入{Injectable};
从'@angular/Router'导入{Router,CanActivate};
从“angular2令牌”导入{Angular2TokenService};
从“rxjs/Observable”导入{Observable};
导入'rxjs/add/operator/map';
导入“rxjs/add/operator/toPromise”;
导入“rxjs/add/operator/catch”;
@可注射()
导出类AuthGuard实现了CanActivate{
建造师(
私人代币服务:Angular2TokenService,
专用路由器:路由器{}
canActivate():可观察的布尔值{
返回此。_tokenService.validateToken().map(res=>{
返回res.json().success;
});
}
}
当我加载经过AuthGuard
的页面时,我得到:
未捕获(承诺中):响应状态:401未授权URL:
401状态是预期的。我不明白的是,当响应为401时,如何简单地让我的
canActivate()
函数返回false
。我如何才能做到这一点?以下是我最终如何处理它的:
import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { Angular2TokenService } from 'angular2-token';
import { Observable } from 'rxjs/Observable';
@Injectable()
export class AuthGuard implements CanActivate {
constructor(
private _tokenService: Angular2TokenService,
private router: Router) {}
canActivate():Observable<boolean>|boolean {
return Observable.create(observer => {
this._tokenService.validateToken().subscribe(res => observer.complete(), err => {
this.router.navigate(['/sign-in']);
observer.next(false);
});
});
}
}
从'@angular/core'导入{Injectable};
从'@angular/Router'导入{Router,CanActivate};
从“angular2令牌”导入{Angular2TokenService};
从“rxjs/Observable”导入{Observable};
@可注射()
导出类AuthGuard实现了CanActivate{
建造师(
私人代币服务:Angular2TokenService,
专用路由器:路由器{}
canActivate():可观察的布尔值{
返回可观察的。创建(观察者=>{
此.u令牌服务.validateToken().subscribe(res=>observer.complete(),err=>{
this.router.navigate(['/登录']);
观察者:下一个(假);
});
});
}
}
重要的是我的subscribe
有两个参数。第一个是成功案例,第二个是错误案例