Spring RestTemplate proxy issue

RestTemplate without proxy works as expected, but after set a proxy, it only got the first string of the response.

package pub.itpark.health.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.hc.client5.http.auth.AuthScope;
import org.apache.hc.client5.http.auth.UsernamePasswordCredentials;
import org.apache.hc.client5.http.classic.HttpClient;
import org.apache.hc.client5.http.impl.auth.BasicCredentialsProvider;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.http.HttpHost;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

import static org.junit.jupiter.api.Assertions.assertNotNull;

/**
 * @author LDC
 */
@Slf4j
@SpringBootTest
public class RestTemplateTest {

    final String url = "https://ipinfo.io/json";
    @Value("${config.spider.proxy.host}")
    private String proxyHost;
    @Value("${config.spider.proxy.port}")
    private int proxyPort;
    @Value("${config.spider.proxy.username}")
    private String proxyUsername;
    @Value("${config.spider.proxy.password}")
    private String proxyPassword;


    @Test
    void restTemplateWithProxy() {
        HttpHost proxy = new HttpHost(proxyHost, proxyPort);
        BasicCredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(
                new AuthScope(proxyHost, proxyPort),
                new UsernamePasswordCredentials(proxyUsername, proxyPassword.toCharArray())
        );

        HttpClient httpClient = HttpClients.custom()
                .setProxy(proxy)
                .setDefaultCredentialsProvider(credentialsProvider)
                .build();

        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory(httpClient);
        RestTemplate restTemplate = new RestTemplate(factory);

        String result = restTemplate.getForObject(url, String.class);
        log.info("RestTemplate with proxy get result: {}", result);
        assertNotNull(result);
    }

    @Test
    void restTemplateWithoutProxy() {
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject(url, String.class);
        log.info("RestTemplate without proxy get result: {}", result);
        assertNotNull(result);
    }

}

Here is the log result：

2025-03-14T11:24:29.058+08:00  INFO 5700 --- [    Test worker] [smart-health-backend,,]p.itpark.health.util.RestTemplateTest    : RestTemplate without proxy get result: {
  "ip": "183.223.249.124",
  "city": "Chengdu",
  "region": "Sichuan",
  "country": "CN",
  "loc": "30.6667,104.0667",
  "org": "AS9808 China Mobile Communications Group Co., Ltd.",
  "postal": "610000",
  "timezone": "Asia/Shanghai",
  "readme": "https://ipinfo.io/missingauth"
}
2025-03-14T11:24:33.488+08:00  INFO 5700 --- [    Test worker] [smart-health-backend,,]p.itpark.health.util.RestTemplateTest    : RestTemplate with proxy get result: {

Comment From: bclozel

It doesn't look like a Spring issue but rather a proxy problem or an HttpComponent problem.

Can you try to do the same with curl and share the HTTP response headers and response in both cases ?

Comment From: spring-projects-issues

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