RequestContextHolder多线程获取不到request对象

RequestContextHolder多线程获取不到request对象，调用feign接口时，在Feign中的RequestInterceptor也获取不到HttpServletRequest问题解决方案。

1.RequestContextHolder多线程获取不到request对象
异常信息，报错如下：

2024-07-09 22:06:32.320 [pool-5-thread-2] ERROR com.mergeplus.handler.ObjectHandler:227 - class: interface org.jeecg.common.system.api.client.SysFeignClient, methodName=mergeRegion, error: {}
java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.
 at org.springframework.web.context.request.RequestContextHolder.currentRequestAttributes(RequestContextHolder.java:131)
 at org.springframework.web.context.support.WebApplicationContextUtils.currentRequestAttributes(WebApplicationContextUtils.java:313)
 at org.springframework.web.context.support.WebApplicationContextUtils$RequestObjectFactory.getObject(WebApplicationContextUtils.java:329)
 at org.springframework.web.context.support.WebApplicationContextUtils$RequestObjectFactory.getObject(WebApplicationContextUtils.java:324)
 at org.springframework.beans.factory.support.AutowireUtils$ObjectFactoryDelegatingInvocationHandler.invoke(AutowireUtils.java:283)
 at jdk.proxy2/jdk.proxy2.$Proxy179.getHeaderNames(Unknown Source)
 at com.mergeplus.handler.ObjectHandler.lambda$doHandler$0(ObjectHandler.java:155)
 at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run$$$capture(CompletableFuture.java:1768)
 at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java)
 at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
 at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
 at java.base/java.lang.Thread.run(Thread.java:833)

异常错误截图：
在这里插入图片描述
2.解决方案

        // 设置子线程共享(重点)
        final RequestAttributes attributes = RequestContextHolder.getRequestAttributes();

        merges.stream().map(e -> CompletableFuture.supplyAsync(() -> {
            JSONObject returnMap = null;
            try {
                if (e.getClientBean() != null) {
                    // 设置当前线程的 RequestAttributes(重点)
                    RequestContextHolder.setRequestAttributes(attributes);

                    Object returnValue = e.getMethod().invoke(e.getClientBean(), jsonObject.get(e.getSourceKey()));
                    if (returnValue == null) {
                        return e;
                    }
                    returnMap = JSON.parseObject(JSON.toJSONString(returnValue));

                    if (returnMap == null || returnMap.isEmpty()) {
                        return e;
                    }

                    result.put(e.getTargetKey(), returnMap.get(jsonObject.get(e.getSourceKey())));
                } else {
                    if (e.getUrl() == null || e.getUrl().trim().length() == 0) {
                        return e;
                    }

                    //设置Http的Header
                    HttpHeaders headers = new HttpHeaders();
                    headers.setContentType(MediaType.APPLICATION_JSON);

                    //设置访问参数
                    HashMap<String, Object> params = new HashMap<>();
                    if (e.getKey() == null || e.getKey().trim().length() == 0) {
                        params.put(e.getSourceKey(), jsonObject.get(e.getSourceKey()));
                    }
                    //设置访问的Entity
                    HttpEntity entity = new HttpEntity<>(params, headers);

                    // todo
                    ResponseEntity<Object> exchange = restTemplate.exchange(e.getUrl(), HttpMethod.GET, entity, Object.class);
                    if (exchange == null) {
                        return e;
                    }

                    Object body = exchange.getBody();
                    if (body == null) {
                        return e;
                    }

                    returnMap = JSON.parseObject(JSON.toJSONString(body));
                    if (returnMap == null || returnMap.isEmpty()) {
                        return e;
                    }

                    result.put(e.getTargetKey(), returnMap.get(jsonObject.get(e.getSourceKey())));

//                    if (body instanceof Map) {
//                        returnMap = (Map) body;
//                        if (returnMap == null || returnMap.isEmpty()) {
//                            return e;
//                        }
//                        result.put(e.getTargetKey(), returnMap.get(jsonObject.get(e.getSourceKey())));
//                    }
                }
            } catch (Exception ex) {
                log.error("class: {}, methodName={}, error: {}", e.getClientBeanClazz(), e.getMethod().getName(), ex);
            } finally {
                RequestContextHolder.resetRequestAttributes(); // 记得在最后重置请求属性(重点)
            }
            return e;
        }, executor)).toList().stream().map(CompletableFuture::join).collect(Collectors.toList());

在这里插入图片描述

FeignInterceptorConfig代码

package org.jeecg.config;

import java.io.IOException;
import java.util.*;


import feign.RequestTemplate;
import jakarta.servlet.http.HttpServletRequest;
import org.apache.commons.lang3.StringUtils;
import org.jeecg.common.config.mqtoken.UserTokenContext;
import org.jeecg.common.constant.CommonConstant;
import org.jeecg.common.util.DateUtils;
import org.jeecg.common.util.PathMatcherUtil;
import org.jeecg.common.util.SpringContextUtils;
import org.jeecg.common.util.TokenUtils;
import org.jeecg.config.sign.interceptor.SignAuthConfiguration;
import org.jeecg.config.sign.util.HttpUtils;
import org.jeecg.config.sign.util.SignUtil;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.cloud.openfeign.FeignAutoConfiguration;
import org.springframework.cloud.openfeign.support.SpringDecoder;
import org.springframework.cloud.openfeign.support.SpringEncoder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.context.annotation.Scope;
import org.springframework.http.MediaType;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

import feign.Feign;
import feign.Logger;
import feign.RequestInterceptor;
import feign.codec.Decoder;
import feign.codec.Encoder;
import feign.form.spring.SpringFormEncoder;
import lombok.extern.slf4j.Slf4j;

/**
 * @Description: FeignConfig
 * @author: JeecgBoot
 */
@ConditionalOnClass(Feign.class)
@AutoConfigureBefore(FeignAutoConfiguration.class)
@Slf4j
@Configuration
public class FeignInterceptorConfig {

    @Bean
    public RequestInterceptor requestInterceptor() {
        return requestTemplate -> {
            ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            if (requestAttributes == null) {
                return;
            }
            //1.获取请求对象
            HttpServletRequest request = requestAttributes.getRequest();
            Enumeration<String> headerNames = request.getHeaderNames();

            if (headerNames == null || !headerNames.hasMoreElements()) {
                return;
            }
            //2.获取请求对象中的所有的头信息(网关传递过来的)
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();//头的名称
                // 跳过content-length，不然可能会报too many bites written问题
                if ("content-length".equalsIgnoreCase(name)) {
                    continue;
                }
                String value = request.getHeader(name);//头名称对应的值
                // System.out.println("name:" + name + "::::::::value:" + value);
                //3.将头信息传递给feign (restTemplate)
                requestTemplate.header(name,value);

//                if (CommonConstant.X_ACCESS_TOKEN.equals(name) && StringUtils.isBlank(value)) {
//                    String token = UserTokenContext.getToken();
//                    requestTemplate.header(CommonConstant.X_ACCESS_TOKEN, token);
//                }

            }

            //================================================================================================================
            //针对特殊接口，进行加签验证 ——根据URL地址过滤请求 【字典表参数签名验证】
            // todo
            if (PathMatcherUtil.matches(Arrays.asList(PathMatcherUtil.SIGN_URL_LIST),requestTemplate.path())) {
//            if (PathMatcherUtil.matches(Arrays.asList(SignAuthConfiguration.SIGN_URL_LIST),requestTemplate.path())) {
                try {
                    log.info("============================ [begin] fegin api url ============================");
                    log.info(requestTemplate.path());
                    log.info(requestTemplate.method());
                    String queryLine = requestTemplate.queryLine();
                    String questionMark="?";
                    if(queryLine!=null && queryLine.startsWith(questionMark)){
                        queryLine = queryLine.substring(1);
                    }
                    log.info(queryLine);
                    if(requestTemplate.body()!=null){
                        log.info(new String(requestTemplate.body()));
                    }
                    SortedMap<String, String> allParams = HttpUtils.getAllParams(requestTemplate.path(),queryLine,requestTemplate.body(),requestTemplate.method());
                    String sign = SignUtil.getParamsSign(allParams);
                    log.info(" Feign request params sign: {}",sign);
                    log.info("============================ [end] fegin api url ============================");
                    requestTemplate.header(CommonConstant.X_SIGN, sign);
                    requestTemplate.header(CommonConstant.X_TIMESTAMP, String.valueOf(System.currentTimeMillis()));
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            //================================================================================================================

        };
    }

}

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