重新订阅Angular请求

import { HttpClient } from '@angular/common/http';

constructor(private http: HttpClient) {}

public sendRequest(): Observable<any> {
  return this.http.get('https://api.example.com/data');
}

public requestData(): void {
  this.sendRequest().subscribe(
    (response) => {
      // 处理返回的数据
      console.log(response);
    },
    (error) => {
      // 处理错误
      console.error(error);
    }
  );
}

private requestSubscription: Subscription;

public requestData(): void {
  this.requestSubscription = this.sendRequest().subscribe(
    (response) => {
      // 处理返回的数据
      console.log(response);
    },
    (error) => {
      // 处理错误
      console.error(error);
    }
  );
}

public resendRequest(): void {
  if (this.requestSubscription) {
    this.requestSubscription.unsubscribe(); // 取消当前的订阅
  }
  
  this.requestData(); // 重新发送请求
}