Spring Boot，自定义身份验证处理程序和Angular 5

Question

我的其余申请存在下一个问题。 我的后端带有自定义身份验证处理程序

public class AutorizacionFilter extends OncePerRequestFilter {
@Autowired
UsuariosService usuarioService;

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
        throws ServletException, IOException {
    String dominio = ((HttpServletRequest) request).getRequestURI();

    if ("OPTIONS".equalsIgnoreCase(request.getMethod())) {
        filterChain.doFilter(request, response);
    } else if (dominio.startsWith("/api/login") || dominio.startsWith("/api/usuarios")) {
        filterChain.doFilter(request, response);
    } else {
        String token = request.getHeader ("Authorization");

        if (token == null || !usuarioService.validarSesion(token)) {
            ((HttpServletResponse) response).sendError(HttpServletResponse.SC_UNAUTHORIZED, "your message goes here");
            return;
        }

        filterChain.doFilter(request, response);
    }
}

在我用Angular 5创建的网页中，我有一个拦截器来捕获401状态码

 @Injectable()
export class AuthHttpInterceptor implements HttpInterceptor {
intercept(
req: HttpRequest<any>,
next: HttpHandler
): Observable<HttpEvent<any>> {
if (!req.headers.has("Content-Type")) {
  req = req.clone({
    headers: req.headers.set("Content-Type", "application/json")
  });
}

req = req.clone({ headers: req.headers.set("Accept", "application/json") });
console.log(JSON.stringify(req.headers));
return next.handle(req).do(
  (event: HttpEvent<any>) => {
    if (event instanceof HttpResponse) {
      console.log("Autorizacion OK!");
      console.log("Code: " + event.status);
    }
  },
  (err: HttpErrorResponse) => {
    if (err.error instanceof Error) {
      console.log("An error occurred:", err.error.message);
    } else {
      console.log(
        `Backend returned code ${err.status}, body was: ${err.message}`
      );
    }
  }
);}}

当代币到期时，拦截器无法解析答案，并给我这个错误

针对（未知网址）的Http错误响应：0未知错误

我有很多关于httpClient响应为空的问题的阅读资料，但我无法理解如何解决/找到解决方法。

任何人都可以伸出援助之手来理解这个问题。

谢谢

Answer 1

感谢@Asura的回答，我设置了响应头并解决了问题。 这是代码。

if (token == null || !usuarioService.validarSesion(token)) {
            ((HttpServletResponse) response).setHeader("Access-Control-Allow-Origin", "*");
            ((HttpServletResponse) response).setHeader("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS, HEAD");
            ((HttpServletResponse) response).setStatus(HttpServletResponse.SC_UNAUTHORIZED);

            return;
        }