D-Net

import { Inject, Injectable, InjectionToken } from '@angular/core';

import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';

import { Observable } from 'rxjs';

import { timeout } from 'rxjs/operators';

export const DEFAULT_TIMEOUT = new InjectionToken<number>('defaultTimeout');

@Injectable()

export class TimeoutInterceptor implements HttpInterceptor {

  constructor(@Inject(DEFAULT_TIMEOUT) protected defaultTimeout: number) {

  }

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    const timeoutValue = req.headers.get('timeout') || this.defaultTimeout;

    const timeoutValueNumeric = Number(timeoutValue);

    return next.handle(req).pipe(timeout(timeoutValueNumeric));

  }

}