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package com.tanpu.community.config;
import feign.RequestInterceptor;
import feign.RequestTemplate;
import lombok.extern.slf4j.Slf4j;
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.Enumeration;
import java.util.Map;
/**
* @description: 透传spring 头信息
* @author: wanglei
* @created: 2020/05/08 11:55
*/
@Slf4j
@Component
public class MyFeignInterceptor implements RequestInterceptor {
@Override
public void apply(RequestTemplate template) {
HttpServletRequest request = getHttpServletRequest();
if (request != null) {
Map<String, Collection<String>> feignHeaders = template.headers();
Enumeration<String> headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String name = headerNames.nextElement();
// 不覆盖feign的头信息
if (!feignHeaders.containsKey(name) ) {
// if (name.equalsIgnoreCase("uid") || name.equalsIgnoreCase("tamptoken")){
template.header(name, request.getHeader(name));
// }
}
}
log.debug("添加后的头信息:{}", template.headers());
} else {
log.debug("没有添加feign头信息");
}
}
/**
* 如果不是从controller过来的请求(例如定时器等)，是没有request对象的
*/
private HttpServletRequest getHttpServletRequest() {
try {
return ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
} catch (Exception e) {
}
return null;
}
}