angular4 httpclient csrf does not send x-xsrf-token

What you are looking for is HttpClientXsrfModule.

Please read more about it here: https://angular.io/api/common/http/HttpClientXsrfModule.

Your usage should be like this:

imports: [   
 HttpClientModule,  
 HttpClientXsrfModule.withOptions({
   cookieName: 'My-Xsrf-Cookie', // this is optional
   headerName: 'My-Xsrf-Header' // this is optional
 }) 
]

Additionally, if your code targets API via absolute URL, default CSRF interceptor will not work out of the box. Instead you have to implement your own interceptor which does not ignore absolute routes.

@Injectable()
export class HttpXsrfInterceptor implements HttpInterceptor {

  constructor(private tokenExtractor: HttpXsrfTokenExtractor) {
  }

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    const headerName = 'X-XSRF-TOKEN';
    let token = this.tokenExtractor.getToken() as string;
    if (token !== null && !req.headers.has(headerName)) {
      req = req.clone({ headers: req.headers.set(headerName, token) });
    }
    return next.handle(req);
  }
}

And finally add it to your providers:

providers: [
  { provide: HTTP_INTERCEPTORS, useClass: HttpXsrfInterceptor, multi: true }
]

I suppose the correct method is withOptions. I used withConfig and got error Property 'withConfig' does not exist on type 'typeof HttpClientXsrfModule'. This is a typing issue in the documentation. You need to use "withOptions" instead HttpClientXsrfModule.withOptions({ cookieName: 'My-Xsrf-Cookie', headerName: 'My-Xsrf-Header', })