我正在尝试向 发出帖子请求，URL = "https://sambhav.daily.co/v1/rooms"但我收到了被 cors 政策阻止的错误

addRoom(): Observable<any> {
    const headers = new HttpHeaders()
      .set("content-type", "application/json")
      .set("Access-Control-Allow-Origin", "http://localhost:8000")
      .set("Access-Control-Allow-Methods", "GET,POST,PATCH,DELETE,PUT,OPTIONS")
      .set(
        "Access-Control-Allow-Headers",
        "Origin, Content-Type, X-Auth-Token, content-type"
      )
      .set(
        "Authorization",
        `Bearer <API-KEY>`
      );
    return this.http
      .post(URL, { headers: headers })
      .map((response: any) => response.data)
      .catch(this.handleError);
  }

我收到的错误

Access to XMLHttpRequest at 'https://sambhav.daily.co/v1/rooms' from origin 'http://localhost:8000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

回答