解决OpenFeign远程调用需要传递请求头的问题

这里需要配置一个Bean，代码如下

@Configuration
public class FeignConfiguration {

    
    @Bean
    public RequestInterceptor requestInterceptor(){
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate requestTemplate) {
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                if (attributes!=null){
                    HttpServletRequest request = attributes.getRequest();
                    Enumeration headerNames = request.getHeaderNames();
                    if (headerNames!=null){
                        while (headerNames.hasMoreElements()){
                            String headerName = headerNames.nextElement();
                            String header = request.getHeader(headerName);
                            requestTemplate.header(headerName,header);
                        }
                    }
                }
            }
        };
    }
}

大概意思就是，将前端传递过来的请求头，原封不动的通过feign远程调用传递给服务被调用方。