Openfegin remote call lost request header problem

reason

Interceptor called

Solution configuration （ Non asynchronous ）

package com.jhj.gulimall.product.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
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 javax.servlet.http.HttpServletRequest;

@Configuration
public class GuliFeginConfig {
    

    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor(){
    
        return new RequestInterceptor() {
    
            @Override
            public void apply(RequestTemplate requestTemplate) {
    

                // Get the original request information that just came in   Bottom utilization threadlocal  So the problem will reappear again when asynchronous 
                ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                HttpServletRequest request=requestAttributes.getRequest();
                // Synchronization request header data   for example Cookie requestTemplate Is a new request to send 
                if(request != null){
    
	                String cookie = request.getHeader("Cookie");
	                requestTemplate.header("Cookie",cookie);
                }

            }
        };
    }
}

Resolve asynchrony

Need to combine Non asynchronous configuration

// Get before the asynchronous method executes request
	RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
	CompletableFuture.runAsync(()->{
    
	// When the asynchronous method executes, it writes request
		RequestContextHolder.setRequestAttributes(requestAttributes)
		System.out.println(" Current thread "+Thread.currentThread().getId());
		int i=10/2;
		System.out.println(" Running results "+i);
	},executor);

Author's statement

 If there is a problem , Welcome to correct ！