如何在角度上传递拦截器上的查询？

Question

有什么方法可以在角度8的拦截器上传递查询和参数

    const params = new HttpParams()
            .set('lang', localStorage.getItem('language'))
            .set('android_version', '1')

Answer 1

您可以使用方法修改请求 HttpRequest#clone。

@Injectable()
export class CustomInterceptor implements HttpInterceptor {

  constructor() {}

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

    const newReq = req.clone({
      params: (req.params ? req.params : new HttpParams())
                 .set('lang', localStorage.getItem('language')) /*.... add new params here .....*/ 
    });

    return next.handle(newReq);
  }
}

参考： https: //angular.io/guide/http#immutability