package com.yc.utils;

import javax.servlet.http.HttpServletRequest;

public class IPUtil {
	 /**
	  * 通过request获得客户端ip
	  * @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();
		}
		return ip;
  }
	
	public static String getMainDomain(HttpServletRequest request) {
    	String domain = request.getServerName();
    	int tempIndex = -1;
    	if(-1 != (tempIndex=domain.lastIndexOf("."))){
    		String temp = domain.substring(0,tempIndex);
    		tempIndex = temp.lastIndexOf(".");
    		domain = domain.substring(tempIndex+1);
    	}
    	return domain;
	}
	 /**
	     * 验证ip是否合法
	     * 
	     * @param text
	     *            ip地址
	     * @return 验证信息
	     */
	    public static boolean ipCheck(String text) {
	        if (text != null && !text.isEmpty()) {
	            // 定义正则表达式
	            String regex = "^(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|[1-9])\\."
	                    + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
	                    + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
	                    + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)$";
	            // 判断ip地址是否与正则表达式匹配
	            if (text.matches(regex)) {
	                // 返回判断信息
	                return true;
	            } else {
	                // 返回判断信息
	                return false;
	            }
	        }
	        // 返回判断信息
	        return false;
	    }
}