package cn.ksource.core.util;

import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;

import cn.ksource.core.CascadeMap;

public class IPUtil {

	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;
	}
	
	/**
	 * 获取本机IP地址
	 * @return
	 * @version V1.0.0
	 * @author 杨凯
	 * @throws HttpRemoteException 
	 * @date Jan 25, 2014 2:21:05 PM
	 */
	public static IPEntity getIpEntity() throws HttpRemoteException{
		IPEntity ipEntity = new IPEntity();
		ipEntity.setLanIP(getLocalHostIp());
		String content = HttpUtil.doGet("http://pv.sohu.com/cityjson", null, HttpCharset.GBK);
		content = StringUtils.removeStart(content, "var returnCitySN = ");
		content = StringUtils.removeEnd(content, ";");
		Map ipMap = JsonUtil.json2Map(content);
		ipEntity.setInternetIP(ConvertUtil.obj2Str(ipMap.get("cip")));
		ipEntity.setPosition(ConvertUtil.obj2Str(ipMap.get("cname")));
		return ipEntity;
	}
	
	public static void main(String[] args) throws HttpRemoteException {
		String content = HttpUtil.doGet("http://pv.sohu.com/cityjson", null, HttpCharset.GBK);
		content = StringUtils.removeStart(content, "var returnCitySN = ");
		content = StringUtils.removeEnd(content, ";");
		
		Map ipMap = JsonUtil.json2Map(content);
		System.out.println(ipMap.get("cid"));
		
		String ip = content.replaceAll("：",":");
		
		System.out.println(content);
		System.out.println(ip);
	}
	
	
	/**
	 * 获取本机IP地址，操作系统为Windows，Linux上返回127.0.0.1
	 * 杨凯
	 * @return
	 */
	public static String getLocalHostIp(){
		String ip ="";
		
		try {
			ip = InetAddress.getLocalHost().getHostAddress();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return ip;
	}

	/**
	 * 是否内网IP
	 * @param ipAddress
	 * @return
	 * @version V1.0.0
	 * @author 杨凯
	 * @date Jan 25, 2014 1:29:57 PM
	 */
	public static boolean isInnerIP(String ipAddress) {
		
		if (ipAddress.equals("127.0.0.1")) {
			return true;
		}
		
		long ipNum = getIpNum(ipAddress);
		
		/**
		 * 私有IP：A类 10.0.0.0-10.255.255.255 B类 172.16.0.0-172.31.255.255 C类
		 * 192.168.0.0-192.168.255.255 当然，还有127这个网段是环回地址
		 */
		List<Map<String, String>> ipList = new ArrayList<Map<String,String>>();
		ipList.add(new CascadeMap().put("START_IP", "10.0.0.0").put("END_IP", "10.255.255.255"));
		ipList.add(new CascadeMap().put("START_IP", "172.16.0.0").put("END_IP", "172.31.255.255"));
		ipList.add(new CascadeMap().put("START_IP", "192.168.0.0").put("END_IP", "192.168.255.255"));
		ipList.add(new CascadeMap().put("START_IP", "1.1.0.0").put("END_IP", "1.1.255.255"));
		
		
		for (Map<String, String> map : ipList) {
			if ((ipNum >= getIpNum(map.get("START_IP")) && ipNum <= getIpNum(map.get("END_IP")))) {
				return true;
			}
		}
		return false;
	}

	private static long getIpNum(String ipAddress) {
		String[] ip = ipAddress.split("\\.");
		long a = Integer.parseInt(ip[0]);
		long b = Integer.parseInt(ip[1]);
		long c = Integer.parseInt(ip[2]);
		long d = Integer.parseInt(ip[3]);

		long ipNum = a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d;
		return ipNum;
	}


}