package com.java.basic.pattern;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

/**

 * 获取客户端操作系统信息

 * 从http的header中获取到user-agent，然后利用正则表达式判断是哪一种操作系统

 *

 * 暂只匹配Win 7、WinXP、Win2003、Win2000、MAC、WinNT、Linux、Mac68k、Win9x

 *

 * @param userAgent request.getHeader("user-agent")的返回值

 *

 * @author

 *

 */

public class ClientOS {

    private static final String USER_AGENT = "";

    public static void main(String[] args) {

        String clientOS = getClientOS(USER_AGENT);

    }

    public static String getClientOS(String userAgent){

        String cos = "unknow os";

        Pattern p = Pattern.compile(".*(Windows NT 6\\.1).*");

        Matcher m = p.matcher(userAgent);

        if(m.find()){

            cos = "Windows7";

            return cos;

        }

        p = Pattern.compile(".*(Windows NT 5\\.1|Windows XP).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "WinXP";

            return cos;

        }

        p = Pattern.compile(".*(Windows NT 5\\.2).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "Win2003";

            return cos;

        }

        p = Pattern.compile(".*(Win2000|Windows 2000|Windows NT 5\\.0).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "Win2000";

            return cos;

        }

        p = Pattern.compile(".*(Mac|apple|MacOS8).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "MAC";

            return cos;

        }

        p = Pattern.compile(".*(WinNT|WindowsNT).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "WinNT";

            return cos;

        }

        p = Pattern.compile(".*Linux.*");

        if(m.find()){

            cos = "Linux";

            return cos;

        }

        p = Pattern.compile(".*68k|68000.*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "Mac68k";

            return cos;

        }

        p = Pattern.compile(".*(9x 4.90|Win9(5|8)|Windows 9(5|8)|95/NT|Win32|32bit).*");

        m = p.matcher(userAgent);

        if(m.find()){

            cos = "Win9x";

            return cos;

        }

        return cos;

    }

}