package com.audaque.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

public class GetIp {
	 public String getIpAddr(HttpServletRequest request){  
	        String 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") || ipAddress.equals("0:0:0:0:0:0:0:1")){  
	                    //根據網絡卡取本機配置的IP  
	                    InetAddress inet=null;  
	                    try {  
	                        inet = InetAddress.getLocalHost();  
	                    } catch (UnknownHostException e) {  
	                        e.printStackTrace();  
	                    }  
	                    ipAddress= inet.getHostAddress();  
	                }  
	            }  
	            //對於通過多個代理的情況，第一個IP為客戶端真實IP,多個IP按照','分割  
	            if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15  
	                if(ipAddress.indexOf(",")>0){  
	                    ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));  
	                }  
	            }  
	            return ipAddress;   
	    }
}