angular - 当 url 是请求类型而不是 Angular 中的字符串时，http.request 不关心选项参数

Question

我注意到在调用 http.request

时

request(url: string|Request, options?: RequestOptionsArgs): Observable<Response>

options?: RequestOptionsArgs 如果 url: string|Request 参数是请求类型而非字符串类型，则参数似乎会被忽略。如果它是 Request 类型，那么这将覆盖在 optional 参数上设置的任何 header 。

Angular 版本:2.4.2

谁能证实这一点？这是预期行为还是错误？

Answer 1

这似乎是正确的，

 request(url: string|Request, options?: RequestOptionsArgs): Observable<Response> {
    let responseObservable: any;
    if (typeof url === 'string') {
      responseObservable = httpRequest(
          this._backend,
          new Request(mergeOptions(this._defaultOptions, options, RequestMethod.Get, <string>url)));
    } else if (url instanceof Request) {
      responseObservable = httpRequest(this._backend, url);
    } else {
      throw new Error('First argument must be a url string or Request instance.');
    }
    return responseObservable;
  }

源代码:https://github.com/angular/angular/blob/master/packages/http/src/http.ts#L113