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SpringBoot中restTemplate請求存在亂碼問題的解決方法

更新時間：2024年11月21日 11:34:45 作者：ReadyShowShow

這篇文章主要介紹了SpringBoot中restTemplate請求存在亂碼問題的解決方法,文中有相關(guān)的圖文和代碼示例供大家參考,對大家的解決問題有一定的幫助,需要的朋友可以參考下

SpringBoot中的restTemplate請求存在亂碼問題的解決

搜索網(wǎng)上各種解法，最后在不斷的一點(diǎn)點(diǎn)對比中，排查到了問題，是restTemplate不支持gzip，對返回的數(shù)據(jù)不能對gzip自動解壓，因此需要去掉header中的accept-encoding

網(wǎng)上提到的另一種解決方式是配置

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() {
        // 創(chuàng)建 HttpClient
        CloseableHttpClient httpClient = HttpClients.custom()
                .setConnectionManager(new PoolingHttpClientConnectionManager())
                .build();

        // 配置 RequestFactory
        HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(httpClient);
        RestTemplate restTemplate = new RestTemplate(requestFactory);

        // 添加請求頭，告知服務(wù)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;
    }
}

而實(shí)際運(yùn)行時還是會報(bào)錯的。
一個解決方案就是 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); //必須去掉gzip壓縮
        ResponseEntity<String> response = restTemplate.exchange(targetUrl, HttpMethod.GET, new HttpEntity<>(headers), String.class);
        return ResponseEntity.status(response.getStatusCode()).body(response.getBody());
    }

最終原因

再深入分析后，發(fā)現(xiàn)實(shí)現(xiàn)代理時，應(yīng)返回字節(jié)流，而不能是字符流，就能完美的實(shí)現(xiàn)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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