如何实现对openfeign的请求request和响应response的拦截

• 通过实现对openfeign的请求request和响应response的拦截，可以在request和response添加自定义的需求及业务

• 拦截openfeign的请求，并添加业务

import javax.servlet.http.HttpServletRequest;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import io.micrometer.core.instrument.util.StringUtils;
import io.seata.core.context.RootContext;

@Configuration
public class ComonConfig {
   

	@Bean
	public RequestInterceptor requestInterceptor() {
   
		return new RequestInterceptor() {
   
			@Override
			public void apply(RequestTemplate requestTemplate) {
   
				ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
						.getRequestAttributes();
				HttpServletRequest request = attributes.getRequest(); // 老 request
				
	            // 从Seata获取XID，并将其添加到Feign请求标头中
	            String xid = RootContext.getXID();
	            if (xid != null) {
   
	                requestTemplate.header("TX_XID", xid);
	            }
				
				requestTemplate.header("Cookie", request.getHeader("Cookie")); // 新request
				String pageSizeDefault = "20";
				String pageNumDefalut = "1";
				String pageSize = request.getParameter("pageSize");
				String pageNum = request.getParameter("pageNum");
				if (StringUtils.isNotEmpty(pageSize)) {
   
					pageSizeDefault = pageSize;
				}
				if (StringUtils.isNotEmpty(pageNum)) {
   
					pageNumDefalut = pageNum;
				}
				requestTemplate.header("pageSize", pageSizeDefault);
				requestTemplate.header("pageNum"