angualr2: http.get 404异常处理

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

// ...

constructor(private http: HttpClient) {}

getData() {
  this.http.get('http://example.com/api/data').subscribe(
    (response) => {
      // 处理成功的情况
      console.log(response);
    },
    (error: HttpErrorResponse) => {
      if (error.status === 404) {
        // 处理404异常
        console.log('资源未找到');
      } else {
        // 处理其他异常
        console.log('发生错误', error);
      }
    }
  );
}