RequestUtils 包装工具类

package com.pc.core.util;

import java.net.MalformedURLException;
import java.net.URL;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.NumberUtils;
/**
* RequestUtils 这个类主要是用来获取关于请求的一些信息的工具类 
* @author YUNFENCGHENG
* 2011-9-19 下午04:36:22
*/
public class RequestUtils {

    /**
     * 获取客户端IP地址，此方法用在proxy环境中
     * @param req
     * @return
     */
    public static String getRemoteAddr(HttpServletRequest req) {
        String ip = req.getHeader("X-Forwarded-For");
        if(StringUtils.isNotBlank(ip)){
            String[] ips = StringUtils.split(ip,',');
            if(ips!=null){
                for(String tmpip : ips){
                    if(StringUtils.isBlank(tmpip))
                        continue;
                    tmpip = tmpip.trim();
                    if(isIPAddr(tmpip) && !tmpip.startsWith("10.") && !tmpip.startsWith("192.168.") && !"127.0.0.1".equals(tmpip)){
                        return tmpip.trim();
                    }
                }
            }
        }
        ip = req.getHeader("x-real-ip");
        if(isIPAddr(ip))
            return ip;
        ip = req.getRemoteAddr();
        if(ip.indexOf('.')==-1)
            ip = "127.0.0.1";
        return ip;
    }

    /**
     * 判断是否为搜索引擎
     * @param req
     * @return
     */
    public static boolean isRobot(HttpServletRequest req){
        String ua = req.getHeader("user-agent");
        if(StringUtils.isBlank(ua)) return false;
        return (ua != null
                && (ua.indexOf("Baiduspider") != -1 || ua.indexOf("Googlebot") != -1
                        || ua.indexOf("sogou") != -1
                        || ua.indexOf("sina") != -1
                        || ua.indexOf("iaskspider") != -1
                        || ua.indexOf("ia_archiver") != -1
                        || ua.indexOf("Sosospider") != -1
                        || ua.indexOf("YoudaoBot") != -1
                        || ua.indexOf("yahoo") != -1 
                        || ua.indexOf("yodao") != -1
                        || ua.indexOf("MSNBot") != -1
                        || ua.indexOf("spider") != -1
                        || ua.indexOf("Twiceler") != -1
                        || ua.indexOf("Sosoimagespider") != -1
                        || ua.indexOf("naver.com/robots") != -1
                        || ua.indexOf("Nutch") != -1
                        || ua.indexOf("spider") != -1));    
    }

    /**
     * 获取COOKIE
     * 
     * @param name
     */
    public static Cookie getCookie(HttpServletRequest request, String name) {
        Cookie[] cookies = request.getCookies();
        if(cookies == null)    return null;
        for (Cookie ck : cookies) {
            if (StringUtils.equalsIgnoreCase(name,ck.getName())) 
                return ck;            
        }
        return null;
    }

    /**
     * 获取COOKIE
     * 
     * @param name
     */
    public static String getCookieValue(HttpServletRequest request, String name) {
        Cookie[] cookies = request.getCookies();
        if(cookies == null)    return null;
        for (Cookie ck : cookies) {
            if (StringUtils.equalsIgnoreCase(name,ck.getName())) 
                return ck.getValue();            
        }
        return null;
    }

    /**
     * 设置COOKIE
     * 
     * @param name
     * @param value
     * @param maxAge
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String name,
            String value, int maxAge) {
        setCookie(request,response,name,value,maxAge,true);
    }

    /**
     * 设置COOKIE
     * 
     * @param name
     * @param value
     * @param maxAge
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String name,
            String value, int maxAge, boolean all_sub_domain) {
        Cookie cookie = new Cookie(name, value);
        cookie.setMaxAge(maxAge);
        if(all_sub_domain){
            String serverName = request.getServerName();
            String domain = getDomainOfServerName(serverName);
            if(domain!=null && domain.indexOf('.')!=-1){
                cookie.setDomain('.' + domain);
            }
        }
        cookie.setPath("/");
        response.addCookie(cookie);
    }
    
    public static void deleteCookie(HttpServletRequest request,
            HttpServletResponse response, String name, boolean all_sub_domain) {
        setCookie(request,response,name,"",0,all_sub_domain);
    }

    /**
     * 获取用户访问URL中的根域名
     * 例如: www.dlog.cn -> dlog.cn
     * @param req
     * @return
     */
    public static String getDomainOfServerName(String host){
        if(isIPAddr(host))
            return null;
        String[] names = StringUtils.split(host, '.');
        int len = names.length;
        if(len==1) return null;
        if(len==3){
            return makeup(names[len-2],names[len-1]);
        }
        if(len>3){
            String dp = names[len-2];
            if(dp.equalsIgnoreCase("com")||dp.equalsIgnoreCase("gov")||dp.equalsIgnoreCase("net")||dp.equalsIgnoreCase("edu")||dp.equalsIgnoreCase("org"))
                return makeup(names[len-3],names[len-2],names[len-1]);
            else
                return makeup(names[len-2],names[len-1]);
        }
        return host;
    }

    /**
     * 判断字符串是否是一个IP地址
     * @param addr
     * @return
     */
    public static boolean isIPAddr(String addr){
        if(StringUtils.isEmpty(addr))
            return false;
        String[] ips = StringUtils.split(addr, '.');
        if(ips.length != 4)
            return false;
        try{
            int ipa = Integer.parseInt(ips[0]);
            int ipb = Integer.parseInt(ips[1]);
            int ipc = Integer.parseInt(ips[2]);
            int ipd = Integer.parseInt(ips[3]);
            return ipa >= 0 && ipa <= 255 && ipb >= 0 && ipb <= 255 && ipc >= 0
                    && ipc <= 255 && ipd >= 0 && ipd <= 255;
        }catch(Exception e){}
        return false;
    }
    
    private static String makeup(String...ps){
        StringBuilder s = new StringBuilder();
        for(int idx = 0; idx < ps.length; idx++){
            if(idx > 0)
                s.append('.');
            s.append(ps[idx]);
        }
        return s.toString();
    }

    /**
     * 获取HTTP端口
     * @param req
     * @return
     * @throws MalformedURLException
     */
    public static int getHttpPort(HttpServletRequest req) {
        try {
            return new URL(req.getRequestURL().toString()).getPort();
        } catch (MalformedURLException excp) {
            return 80;
        }
    }    

    /**
     * 获取浏览器提交的整形参数
     * @param param
     * @param defaultValue
     * @return
     */
    public static int getParam(HttpServletRequest req, String param, int defaultValue){
        return NumberUtils.toInt(req.getParameter(param), defaultValue);
    }
    /**
     * 获取浏览器提交的整形参数
     * @param param
     * @param defaultValue
     * @return
     */
    public static long getParam(HttpServletRequest req, String param, long defaultValue){
        return NumberUtils.toLong(req.getParameter(param), defaultValue);
    }
    
    public static long[] getParamValues(HttpServletRequest req, String name){
        String[] values = req.getParameterValues(name);
        if(values==null) return null;
        return (long[])ConvertUtils.convert(values, long.class);
    }