feign设置header的正确方式

feign header这样设置无效

@GetMapping("/xxx")
@Headers( {"yyy: 1", "888-666: wangyong@xxx.com"})
DataResponse queryxxx(@RequestParam String zz);

正确设置:

新增配置类

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.collections4.MapUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;

@Component
public class FeignConfig implements RequestInterceptor {



    @Override
    public void apply(RequestTemplate requestTemplate) {
        // 设置token
        Map> headers = requestTemplate.headers();
        if(MapUtils.isEmpty(headers) || CollectionUtils.isEmpty(headers.get("XXX"))){
            requestTemplate.header("xxx", userToken);
        }
       // 如果配置了 H 的线程模式，这里还会有问题
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if(Objects.isNull(attributes)){
            return;
        }
        HttpServletRequest request = attributes.getRequest();
        String authHeaderValue = request.getHeader(Constant.HR_GLOBAL_TOKEN_NAME);
        if (StringUtils.isNotBlank(authHeaderValue)) {
            requestTemplate.header(yyy, authHeaderValue);
        }
    }
}

并且同样的header重复设置无效,只有第一次设置的可以成功,如

requestTemplate.header(yyy,"111");

再设置

requestTemplate.header(yyy,"222");

那么接收后yyy的值为第一次设置的"111"

可以先移除header

requestTemplate.removeHeader(yyy)