问题

因为最近这个项目没有调用链监控系统的支持，但是，本地PostMan调试的时候又需要请求头才能正常调试。

思路

喊ChatGPT实现一下能够打印所有请求头的拦截器，然后，集成到已有代码即可。

解决

RequestHeaderInterceptor.java

package cn.xxxx.interceptor;import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Enumeration;/*** 打印接受到的所有请求头* @author zhangyalin*/
@Slf4j
@Component
public class RequestHeaderInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {// 获取所有请求头的名称Enumeration<String> headerNames = request.getHeaderNames();while (headerNames.hasMoreElements()) {String headerName = headerNames.nextElement();// 获取请求头的值并打印String headerValue = request.getHeader(headerName);log.debug(headerName + ": " + headerValue);}return HandlerInterceptor.super.preHandle(request, response, handler);}
}

WebMvcConfiguration.java

在Springboot的配置类中集成上面的拦截器即可。

package cn.xxxx.config;import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import javax.annotation.Resource;/*** 基础配置* @author zhangyalin*/
@RefreshScope
@ComponentScan({"cn.xxxx", "cn.xxx.sxa"})
@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer {@Resourceprivate RequestHeaderInterceptor requestHeaderInterceptor;@Value("${interceptors.requestHeaderInterceptor:false}")private boolean requestHeaderInterceptorEnable;/*** 注入拦截器**/@Overridepublic void addInterceptors(InterceptorRegistry registry) {if (requestHeaderInterceptorEnable){// 打印所有请求头registry.addInterceptor(requestHeaderInterceptor).order(Ordered.HIGHEST_PRECEDENCE).addPathPatterns("/**");}}
}

配置中心

logging:level:cn.xxxx.interceptor: DEBUG
interceptors:requestHeaderInterceptor: true

总结

这就是简单使用HandlerInterceptor，实现自己的请求头打印拦截器。我这里配置中心，动态性还是不很完善。interceptors.requestHeaderInterceptor配置修改后，得重启服务才能生效。