spring cloud 微服务调用微服务未认证解决方案(Feign)

逃离我推掉我的手 2022-02-22 02:27 951阅读 0赞

响应异常:

{"error":"unauthorized","error_description":"Full authentication is required to access thisresource"}

当实现了用户携带身份令牌访问微服务之后,

微服务直接的访问调用就会抛出未授权的异常,,解决方案 服务直接调用时携带令牌

**Feign 拦截器**

添加依赖：

<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
        <version>1.4.4.RELEASE</version>
    </dependency>

创建拦截器

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;
    
    public class FeignClientInterceptor implements RequestInterceptor {
    
        @Override
        public void apply(RequestTemplate requestTemplate) {
    
    
    
            //拦截器
            //使用RequestContextHolder工具获取request相关变量
            try {
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    
                if (attributes != null){
    
    
    //            取出request
                    HttpServletRequest request = attributes.getRequest();
    
    //                取出所有请求头
                    Enumeration<String> headerNames = request.getHeaderNames();
                    while (headerNames.hasMoreElements()){
                        String name = headerNames.nextElement();   // key
                        String value = request.getHeader(name);   //value
    
                        if(name.equals("authorization")){    //auoth2 认证请求头
                            //System.out.println("name="+name+"values="+values);
                            requestTemplate.header(name, value);
    
                        }
                    }
                }
            }catch (Exception e){
    
            }
    
    
        }
    }

使用feign

在 springboot 启动类中配置feign拦截器

//    配置feign拦截器
        @Bean
        public FeignClientInterceptor feignClientInterceptor(){
            return new FeignClientInterceptor();
        }

然后就行了