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package cn.ibizlab.util.web;
import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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;
import java.util.Enumeration;
/**
* feign请求拦截器
* 拦截所有使用feign发出的请求，附加原始请求Header参数及Token
*/
@Configuration
public class FeignRequestInterceptor implements RequestInterceptor {
private final Logger logger = LoggerFactory.getLogger(getClass());
@Override
public void apply(RequestTemplate requestTemplate) {
ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
if(requestAttributes!=null){
HttpServletRequest request = requestAttributes.getRequest();
Enumeration<String> headerNames = request.getHeaderNames();
if (headerNames != null) {
while (headerNames.hasMoreElements()) {
String name = headerNames.nextElement();
if(name.equalsIgnoreCase("transfer-encoding")){
continue;
}
String values = request.getHeader(name);
requestTemplate.header(name, values);
}
logger.info("feign interceptor header:{}",requestTemplate);
}
}
}
}