import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;
/**
?* Feign請(qǐng)求攔截器（設(shè)置請(qǐng)求頭，傳遞登錄信息）
?*
?* @author simon
?* @create 2018-09-07 9:51
?**/
public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {
? @Override
? public void apply(RequestTemplate requestTemplate) {
? ? ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
? ? ? ? ? ? .getRequestAttributes();
? ? HttpServletRequest request = attributes.getRequest();
? ? Enumeration<String> headerNames = request.getHeaderNames();
? ? if (headerNames != null) {
? ? ? while (headerNames.hasMoreElements()) {
? ? ? ? String name = headerNames.nextElement();
? ? ? ? String values = request.getHeader(name);
? ? ? ? requestTemplate.header(name, values);
? ? ? }
? ? }
? }
}

這里只設(shè)置了請(qǐng)求頭，如果想傳遞請(qǐng)求參數(shù)，可以參考如下代碼：

public class FeignBasicAuthRequestInterceptor implements RequestInterceptor {
? @Override
? public void apply(RequestTemplate requestTemplate) {
? ? ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder
? ? ? ? ? ? .getRequestAttributes();
? ? HttpServletRequest request = attributes.getRequest();
? ? Enumeration<String> headerNames = request.getHeaderNames();
? ? if (headerNames != null) {
? ? ? while (headerNames.hasMoreElements()) {
? ? ? ? String name = headerNames.nextElement();
? ? ? ? String values = request.getHeader(name);
? ? ? ? requestTemplate.header(name, values);
? ? ? }
? ? }
? ? Enumeration<String> bodyNames = request.getParameterNames();
? ? ? StringBuffer body =new StringBuffer();
? ? ? if (bodyNames != null) {
? ? ? ? ? while (bodyNames.hasMoreElements()) {
? ? ? ? ? ? String name = bodyNames.nextElement();
? ? ? ? ? ? String values = request.getParameter(name);
? ? ? ? ? ? body.append(name).append("=").append(values).append("&");
? ? ? ? ? }
? ? ? }
? ? ?if(body.length()!=0) {
? ? ? ? body.deleteCharAt(body.length()-1);
? ? ? ? template.body(body.toString());
? ? ? ? logger.info("feign interceptor body:{}",body.toString());
? ? }
? }
}

注冊(cè)配置

package com.southgis.ibase.personalConfigure.config;
import com.southgis.ibase.utils.FeignBasicAuthRequestInterceptor;
import com.southgis.ibase.utils.FeignSpringFormEncoder;
import feign.RequestInterceptor;
import feign.codec.Encoder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
?* Feign配置注冊(cè)（全局）
?*
?* @author simon
?* @create 2018-08-20 11:44
?**/
@Configuration
public class FeignSupportConfig {
? /**
? ?* feign請(qǐng)求攔截器
? ?*
? ?* @return
? ?*/
? @Bean
? public RequestInterceptor requestInterceptor(){
? ? return new FeignBasicAuthRequestInterceptor();
? }
}

這個(gè)文件放在項(xiàng)目的掃描目錄下，所有的feign調(diào)用都會(huì)使用此配置。如果只有某個(gè)feign調(diào)用則可以這樣設(shè)置(但配置類不能在掃描目錄下)：

@FeignClient(name = "organ",path = "/organ/OrganInfo",configuration = FeignSupportConfig.class)

Feign調(diào)用微服務(wù)傳遞header請(qǐng)求頭

package com.chitic.module.core.config;
import feign.RequestInterceptor;
import org.springframework.context.annotation.Bean;
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;
 
@Configuration
public class FeignConfig {
    @Bean
    public RequestInterceptor headerInterceptor() {
        return template -> {
            ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            if (null != attributes) {
                HttpServletRequest request = attributes.getRequest();
                Enumeration<String> headerNames = request.getHeaderNames();
                if (headerNames != null) {
                    while (headerNames.hasMoreElements()) {
                        String name = headerNames.nextElement();
                        String values = request.getHeader(name);
                        template.header(name, values);
                    }
                }
            }
        };
    }
}

需注意，feign調(diào)用時(shí)不能調(diào)用含有HttpServletResponse參數(shù)（比如常用的數(shù)據(jù)導(dǎo)出），以下就不能遠(yuǎn)程調(diào)用，目前沒(méi)找到解決辦法