package com.shove.util;

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

/**
 * 
 * @Description
 * @Author Yang Cheng
 * @Date: Feb 9, 2012 2:03:44 AM
 * @Version
 * 
 */
public class ServletUtils {

	/**
	 * @Description: 获取根目录
	 * @Author Yang Cheng
	 * @Date: Feb 9, 2012 2:07:30 AM
	 * @return
	 * @return String
	 */
	public static String serverRootDirectory() {
		return ServletActionContext.getServletContext().getRealPath(File.separator);
	}

	/**
	 * @Description: 获取请求地址
	 * @Author Yang Cheng
	 * @Date: Feb 9, 2012 2:08:15 AM
	 * @return
	 * @return String
	 */
	public static String serverUrl() {
		HttpServletRequest request = ServletActionContext.getRequest();
		String temp = request.getServerPort() == 80 ? "" : ":" + request.getServerPort();
		return request.getScheme() + "://" + request.getServerName() + temp + request.getContextPath() + "/";
	}

	/**
	 * @Description: 获取当前请求的URL地址域参数
	 * @Author Yang Cheng
	 * @Date: Feb 9, 2012 2:10:02 AM
	 * @param request
	 * @return
	 * @return String
	 */
	@SuppressWarnings("unchecked")
	public static Map<String, Object> getPrams(HttpServletRequest request) {
		Map<String, Object> params = new HashMap<String, Object>();
		Map<String, Object> requestParams = request.getParameterMap();
		for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
			String name = iter.next();
			String[] values = (String[]) requestParams.get(name);
			String valueStr = "";
			for (int i = 0; i < values.length; i++) {
				valueStr = (i == values.length - 1) ? valueStr + values[i] : valueStr + values[i] + ",";
			}
			params.put(name, valueStr);
		}
		return params;
	}

	public static String getRemortIp() {
		HttpServletRequest request = ServletActionContext.getRequest();
		if (request.getHeader("x-forwarded-for") == null) {
			return request.getRemoteAddr();
		}
		return request.getHeader("x-forwarded-for");
	}

	public static String getIpAddress(HttpServletRequest request) {
		String ip = request.getHeader("x-forwarded-for");
		String localIP = "127.0.0.1";
		if ((ip == null) || (ip.length() == 0) || (ip.equalsIgnoreCase(localIP)) || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if ((ip == null) || (ip.length() == 0) || (ip.equalsIgnoreCase(localIP)) || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if ((ip == null) || (ip.length() == 0) || (ip.equalsIgnoreCase(localIP)) || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}
}