package jnpf.audit.sdk;

import jnpf.audit.AuditApiConsts;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/** 读取前端统一提交拦截器传入的审计关联信息。 */
public final class AuditRequestCorrelationResolver {

    public static String currentBizSign() {
        RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
        if (!(attributes instanceof ServletRequestAttributes)) {
            return null;
        }
        return ((ServletRequestAttributes) attributes).getRequest()
                .getHeader(AuditApiConsts.HEADER_BIZ_SIGN);
    }

    private AuditRequestCorrelationResolver() {
    }
}