package com.glxp.api.util;

import org.springframework.scheduling.annotation.Async;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;

public class IpUtils {

    /**
     * 获取客户端IP地址
     *
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
            if (ip.equals("127.0.0.1")) {
                //根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                    ip = inet.getHostAddress();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        // 多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ip != null && ip.length() > 15) {
            if (ip.indexOf(",") > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
        }
        return ip;
    }

    @Async
    public void asyncOrder() {
        System.out.println("执行异步任务: ");
        System.out.println("线程名称：" + Thread.currentThread().getName() + " be ready to read data!");
        try {
            Thread.sleep(1000 * 5);
            System.out.println("---------------------》》》无返回值延迟3秒：");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}