Feign丢失请求头问题

淩亂°似流年 2023-02-16 00:48 42阅读 0赞

### 文章目录 ###

*  1、Feign远程调用丢失请求头问题
 *  2、Feign异步调用丢失请求头问题

> **【笔记于学习尚硅谷课程所作】**

# 1、Feign远程调用丢失请求头问题 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70]

解决：增加拦截器

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70 1]

@Configuration
    public class GuliFeignConfig {
        
    
        /**
         * 解决fein远程调用丢失请求头
         * @return
         */
        @Bean("requestInterceptor")
        public RequestInterceptor requestInterceptor() {
        
            return new RequestInterceptor() {
        
                @Override
                public void apply(RequestTemplate template) {
        
                    // 1、RequestContextHolder 拿到当前的请求
                    ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                    if (attributes != null) {
        
                        // 原始请求 页面发起的老请求
                        HttpServletRequest request = attributes.getRequest();
                        if (request != null) {
        
                            // 获取原始请求的头数据 cookie
                            String cookie = request.getHeader("Cookie");
    
                            // 给feign生成的心请求设置请求头cookie
                            template.header("Cookie", cookie);
                        }
                    }
                }
            };
        }
    }

# 2、Feign异步调用丢失请求头问题 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70 2]

解决：获取之前的请求，让每个异步任务的线程共享ThreadLocal数据

/**
             * 解决异步任务拿不到ThreadLocal里的数据
             * 获取之前的请求，让每个异步任务的线程共享ThreadLocal数据
             */
            RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
    
    
    CompletableFuture<Void> getAddressTask = CompletableFuture.runAsync(() -> {
        
    			// 解决异步任务拿不到ThreadLocal里的数据
                RequestContextHolder.setRequestAttributes(requestAttributes); 
    
                //...
            }, executor);

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200606203252249.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200606203243351.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200606203234979.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTk2NTY4,size_16,color_FFFFFF,t_70