package com.boying.util;

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

public class IpUtil {
	public static String getIpAddr1(HttpServletRequest request) {
		String ipAddress = null;
		try {
			ipAddress = request.getHeader("x-forwarded-for");
			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getHeader("Proxy-Client-IP");
			}
			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getHeader("WL-Proxy-Client-IP");
			}
			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
				ipAddress = request.getRemoteAddr();
				if (ipAddress.equals("127.0.0.1")) {
					// 根据网卡取本机配置的IP
					InetAddress inet = null;
					try {
						inet = InetAddress.getLocalHost();
					} catch (UnknownHostException e) {
						e.printStackTrace();
					}
					ipAddress = inet.getHostAddress();
				}
			}
			// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
			if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
				// = 15
				if (ipAddress.indexOf(",") > 0) {
					ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
				}
			}
		} catch (Exception e) {
			ipAddress = "";
		}
		// ipAddress = this.getRequest().getRemoteAddr();

		return "0:0:0:0:0:0:0:1".equals(ipAddress) ? "127.0.0.1" : ipAddress;
	}

	/**
	 * 获取真实ip地址,不返回内网地址
	 *
	 * @param request
	 * @return
	 */
	public static String getIpAddr2(HttpServletRequest request) {
		//目前则是网关ip
		String ip = request.getHeader("X-Real-IP");
		if (ip != null && !"".equals(ip) && !"unknown".equalsIgnoreCase(ip)) {
			return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
		}
		ip = request.getHeader("X-Forwarded-For");
		if (ip != null && !"".equals(ip) && !"unknown".equalsIgnoreCase(ip)) {
			int index = ip.indexOf(',');
			if (index != -1) {
				//只获取第一个值
				return ip.substring(0, index);
			} else {
				return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
			}
		} else {
			//取不到真实ip则返回空，不能返回内网地址。
			return "";
		}
	}


	//其中ip的获取方式
	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("X-Real-IP");
			//LOGGER.error("X-Real-IP:"+ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("http_client_ip");
//            LOGGER.error("http_client_ip:"+ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
//            LOGGER.error("getRemoteAddr:"+ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
//            LOGGER.error("Proxy-Client-IP:"+ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
//            LOGGER.error("WL-Proxy-Client-IP:"+ip);
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
//            LOGGER.error("HTTP_X_FORWARDED_FOR:"+ip);
		}
// 如果是多级代理，那么取第一个ip为客户ip
		if (ip != null && ip.indexOf(",") != -1) {
			ip = ip.substring(ip.lastIndexOf(",") + 1, ip.length()).trim();
//            LOGGER.error("ip:"+ip);
		}
		return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
	}

}