import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class HttpClientCachingExample {

    public static void main(String[] args) throws IOException {
        // HttpClient 인스턴스 생성
        CloseableHttpClient httpClient = HttpClients.createDefault();

        // GET 요청 생성
        HttpGet httpGet = new HttpGet("http://www.example.com");

        // 캐시 관련 헤더 설정
        httpGet.setHeader("Cache-Control", "max-age=3600"); // 1시간 동안 캐시 유지

        // 요청 실행
        HttpResponse response = httpClient.execute(httpGet);

        // 응답의 상태 코드 확인
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode == 200) {
            // 응답 본문(HTML 컨텐츠) 가져오기
            HttpEntity entity = response.getEntity();
            String responseBody = EntityUtils.toString(entity);
            System.out.println(responseBody);
        } else {
            System.out.println("HTTP GET 요청 실패: " + statusCode);
        }

        // HttpClient 종료
        httpClient.close();
    }
}