SpringBoot中restTemplate请求存在乱码问题的解决方法
作者：ReadyShowShow
这篇文章主要介绍了SpringBoot中restTemplate请求存在乱码问题的解决方法,文中有相关的图文和代码示例供大家参考,对大家的解决问题有一定的帮助,需要的朋友可以参考下
SpringBoot中的restTemplate请求存在乱码问题的解决
搜索网上各种解法，最后在不断的一点点对比中，排查到了问题，是restTemplate不支持gzip，对返回的数据不能对gzip自动解压，因此需要去掉header中的accept-encoding
网上提到的另一种解决方式是配置
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.springframework.http.HttpHeaders;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
@Configuration
public class RestTemplateConfig {
@Bean
public RestTemplate restTemplate() {
// 创建 HttpClient
CloseableHttpClient httpClient = HttpClients.custom()
.setConnectionManager(new PoolingHttpClientConnectionManager())
.build();
// 配置 RequestFactory
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(httpClient);
RestTemplate restTemplate = new RestTemplate(requestFactory);
// 添加请求头，告知服务器支持 Gzip
restTemplate.getInterceptors().add((request, body, execution) -> {
request.getHeaders().add(HttpHeaders.ACCEPT_ENCODING, "gzip, deflate, br");
return execution.execute(request, body);
});
return restTemplate;
}
}
而实际运行时还是会报错的。
一个解决方案就是 headers.remove(HttpHeaders.ACCEPT_ENCODING)，但是并不完美。
@GetMapping("/**")
public ResponseEntity<String> proxyGetRequest(@RequestHeader HttpHeaders headers, HttpServletRequest request) {
String requestUri = request.getRequestURI().replace("/proxy", "");
String targetUrl = "https://pre-youku-prefect-v2.alibaba-inc.com" + requestUri;
headers.remove(HttpHeaders.ACCEPT_ENCODING); //必须去掉gzip压缩
ResponseEntity<String> response = restTemplate.exchange(targetUrl, HttpMethod.GET, new HttpEntity<>(headers), String.class);
return ResponseEntity.status(response.getStatusCode()).body(response.getBody());
}
最终原因
再深入分析后，发现实现代理时，应返回字节流，而不能是字符流，就能完美的实现代理功能
@RestController
@RequestMapping("/proxy")
public class ProxyController {
private final RestTemplate restTemplate;
public ProxyController(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
@GetMapping("/**")
public ResponseEntity<byte[]> proxyGetRequest(@RequestHeader HttpHeaders headers, HttpServletRequest request) {
String requestUri = request.getRequestURI().replace("/proxy", "");
String targetUrl = "https://xxx.com" + requestUri;
ResponseEntity<byte[]> response = restTemplate.exchange(targetUrl, HttpMethod.GET, new HttpEntity<>(headers), byte[].class);
return response;
}
@PostMapping("/**")
public ResponseEntity<byte[]> proxyPostRequest(@RequestHeader HttpHeaders headers, @RequestBody String body, HttpServletRequest request) {
String requestUri = request.getRequestURI().replace("/proxy", "");
String targetUrl = "https://xxx.com" + requestUri;
ResponseEntity<byte[]> response = restTemplate.exchange(targetUrl, HttpMethod.POST, new HttpEntity<>(body, headers), byte[].class);
return response;
}
}
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