RestTemplate 添加公共的请求头信息

场景描述

项目中有很多的RestTemplate 接口，去调用第三方系统，原来第三方系统没有开启权限认证，可以直接调用。现在第三方系统开启了权限认证，导致这些 RestTemplate 接口调用的时候，无法获取数据。

思路

RestTemplate 在请求第三方接口之前，为他们增加公共的请求头信息。这样第三方系统在拦截到请求之后，可以通过请求头信息，来判断是否需要进行权限认证，如果是免权限认证的接口请求，那么直接放行。

改造代码

改造RestTemplate 配置类，改造前：

package com.ruoyi.web.config;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;import java.util.Collections;@Configuration
public class RestTemplateConfig{private int timeoutms = 5 * 60 *1000;@Beanpublic RestTemplate restTemplate(ClientHttpRequestFactory factory){return new RestTemplate(factory);    }@Beanpublic ClientHttpRequestFactory simpleClientHttpRequestFactory(){SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();factory.setReadTimeout(timeoutms);//msfactory.setConnectTimeout(timeoutms);//msreturn factory;}
}

改造后

package com.ruoyi.web.config;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;import java.util.Collections;@Configuration
public class RestTemplateConfig{private int timeoutms = 5 * 60 *1000;@Autowiredprivate  TokenClientHttpRequestInterceptor tokenClientHttpRequestInterceptor;@Beanpublic RestTemplate restTemplate(ClientHttpRequestFactory factory){RestTemplate restTemplate = new RestTemplate(factory);restTemplate.setInterceptors(Collections.singletonList(tokenClientHttpRequestInterceptor));return restTemplate;}@Beanpublic ClientHttpRequestFactory simpleClientHttpRequestFactory(){SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();factory.setReadTimeout(timeoutms);//msfactory.setConnectTimeout(timeoutms);//msreturn factory;}
}

增加自定义的 RestTemplate 请求拦截器类 TokenClientHttpRequestInterceptor

package com.ruoyi.web.config;import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;import java.io.IOException;/*** @Description : 自定义 RestTemplate 请求拦截器* @Date: 2024-01-11 12:06*/
@Component
public class TokenClientHttpRequestInterceptor implements ClientHttpRequestInterceptor {private static final String ADMIN_AUTHORIZATION = "admin_authorization";@Overridepublic ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {try {HttpHeaders headers = request.getHeaders();headers.add(ADMIN_AUTHORIZATION , ADMIN_AUTHORIZATION );} catch (Exception e) {e.printStackTrace();}return execution.execute(request,body);}
}

第三方系统部分代码

/*** 权限拦截** @author xuxueli 2015-12-12 18:09:04*/
@Component
public class PermissionInterceptor extends HandlerInterceptorAdapter {@Resourceprivate LoginService loginService;@Resourceprivate XxlJobUserDao xxlJobUserDao;private static final String ADMIN_AUTHORIZATION = "admin_authorization";@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {if (!(handler instanceof HandlerMethod)) {return super.preHandle(request, response, handler);}// if need loginboolean needLogin = true;boolean needAdminuser = false;HandlerMethod method = (HandlerMethod)handler;String header = request.getHeader(ADMIN_AUTHORIZATION );if (header != null && header.trim().length() > 0){XxlJobUser user = xxlJobUserDao.loadByUserName("admin");request.setAttribute(LoginService.LOGIN_IDENTITY_KEY, user);return super.preHandle(request, response, handler);}
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