Angular 6 Http响应错误拦截器重试请求不起作用

Question

我正在使用刷新令牌，以便在jwt令牌过期时重新记录用户。为了处理重新记录，我创建了一个中间件类。 令牌过期时，api服务器将返回错误代码498；如果没有令牌/无效令牌/无效的刷新令牌，则api将返回401。 要求新令牌的部分可以很好地工作（我可以使用新令牌构建新请求），但是我不明白为什么新请求响应永远不会回来。我认为return temp_next.handle(request);就足够了……

    import { Injectable } from '@angular/core';
    import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from '@angular/common/http';
    import { Observable, throwError } from 'rxjs';
    import { catchError } from 'rxjs/operators';

    import { AuthenticationService } from '../services/authentication.service';

    @Injectable()
    export class ErrorInterceptor implements HttpInterceptor {
        constructor(private authenticationService: AuthenticationService) {}

        intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
            return next.handle(request).pipe(catchError(err => {
                if (err.status === 498) {
                    console.log('Token expired', request.headers.getAll('Authorization'));

                    const currentUser = JSON.parse(localStorage.getItem('currentUser'));

                    const temp_next = next;
                    this.authenticationService.tryRelog(currentUser.username, currentUser.refresh_token, (new_jwt) => {
                        console.log('We got a new token after logging in', new_jwt);
                        const temp_jwt = new_jwt;
                        request = request.clone({
                            setHeaders: {
                                Authorization: `${temp_jwt}`
                            }
                        });
                        console.log('Retrying the request with new token', request.headers.getAll('Authorization'));

                        return temp_next.handle(request);
                    });
                }
                if (err.status === 401) {
                    console.log('We are not authorized here');
                    // auto logout if 401 response returned from api
                    this.authenticationService.logout();
                    location.reload(false);
                }
                if (err.status === 200) {
                    console.log('OK');
                    return;
                }
                const error = err.error.message || err.statusText;
                return throwError(error);
            }));
        }
    }