如何在Angular 5 HttpClientModule中传递3个参数而不是2个参数

Question

我试图将3个参数发送到后端路由器

// Function to get user's profile image
getProfileImage(): Observable<Blob>{
  this.createAuthenticationHeaders(); // Create headers before sending to API
  return this._http.get(this.domain + '/authentication/getProfileImageok', this.options, { responseType: "blob" });
}

但说只能寄两个

Answer 1

不，如果要发送某些参数，则不能按照官方文档发送三个参数，必须将这些参数附加到get请求的第二个参数中。

演示对象-

get(url: string, options: {
    headers?: HttpHeaders | {
        [header: string]: string | string[];
    };
    observe?: HttpObserve;
    params?: HttpParams | {
        [param: string]: string | string[];
    };
    reportProgress?: boolean;
    responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
    withCredentials?: boolean;
} = {}): Observable<any> 

有关更多信息，请参见此处。

• https://www.concretepage.com/angular-2/angular-httpclient-get-example#get