Angular HttpClient get()方法被当前查询参数阻塞

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

@Injectable({
  providedIn: 'root'
})
export class DataService {
  constructor(private http: HttpClient) {}

  getData(params: any) {
    return this.http.get('https://api.example.com/data', { params: params });
  }
}

import { catchError, retry } from 'rxjs/operators';
import { of } from 'rxjs';

getData(params: any) {
  return this.http.get('https://api.example.com/data', { params: params }).pipe(
    retry(3), // 重试3次
    catchError(this.handleError) // 处理错误
  );
}

private handleError(error: any) {
  let errorMessage = '';
  if (error.error instanceof ErrorEvent) {
    // 客户端错误
    errorMessage = `Error: ${error.error.message}`;
  } else {
    // 服务器错误
    errorMessage = `Error Code: ${error.status}\nMessage: ${error.message}`;
  }
  console.error(errorMessage);
  return of(null); // 返回一个空的Observable
}