在阅读了有关http客户端错误处理的有关角度的文档后,我仍然不明白为什么我没有使用以下代码从服务器捕获401错误:
export class interceptor implements HttpInterceptor {
intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
console.log('this log is printed on the console!');
return next.handle(request).do(() => (err: any) => {
console.log('this log isn't');
if (err instanceof HttpErrorResponse) {
if (err.status === 401) {
console.log('nor this one!');
}
}
});
}
}
在控制台日志上,我也得到了:
zone.js:2969 GET http://localhost:8080/test 401 ()
core.js:1449 ERROR HttpErrorResponse {headers: HttpHeaders, status: 401, statusText: "OK", url: "http://localhost:8080/test", ok: false, …}
答案 0 :(得分:3)
您应该使用catchError
return next.handle(request)
.pipe(catchError(err => {
if (err instanceof HttpErrorResponse) {
if (err.status === 401) {
console.log('this should print your error!', err.error);
}
}
}));
答案 1 :(得分:1)
您必须将参数值传递给流的do函数,而不是在其中创建新函数:
return next.handle(request)
.do((err: any) => {
console.log('this log isn't');
if (err instanceof HttpErrorResponse) {
if (err.status === 401) {
console.log('nor this one!');
}
}
});
答案 2 :(得分:1)
它是最重要的,但是Angular的机会处理错误比拦截器更好。 您可以实现自己的ErrorHandler。 https://angular.io/api/core/ErrorHandler
答案 3 :(得分:0)
您的错误处理程序需要返回一个new Observable<HttpEvent<any>>()
return next.handle(request)
.pipe(catchError((err: any) => {
console.log('this log isn't');
if (err instanceof HttpErrorResponse) {
if (err.status === 401) {
console.log('Unauthorized');
}
}
return new Observable<HttpEvent<any>>();
}));
答案 4 :(得分:0)
这是我正在使用的一些示例:
export class ErrorHandlerInterceptor implements HttpInterceptor {
intercept(
request: HttpRequest<any>,
next: HttpHandler
): Observable<HttpEvent<any>> {
const loadingHandlerService = this.inej.get(LoadingHandlerService);
const errorHandlerService = this.inej.get(ErrorHandlerService);
return next.handle(request)
.pipe(
catchError(err => {
loadingHandlerService.hideLoading();
if (err instanceof HttpErrorResponse) { errorHandlerService.handleError(err) }
return new Observable<HttpEvent<any>>();
})
);
}
constructor(private inej: Injector) { }
}