content: /*
   *  Copyright Beijing 58 Information Technology Co.,Ltd.
   *
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package com.bj58.spat.gaea.server.util;
  
  import java.util.regex.Pattern;
  
  import com.bj58.spat.gaea.server.contract.context.Global;
  
  /**
   * 
   * @author Service Platform Architecture Team (spat@58.com)
   */
  public class IPTable {
  	
  	private static Pattern allowPattern;
  	private static Pattern forbidPattern;
  	
  	static {
  		init();
  	}
  	
  	public static void init() {
  		String allowIP = Global.getSingleton().getServiceConfig().getString("gaea.iptable.allow.iplist");
  		String forbidIP = Global.getSingleton().getServiceConfig().getString("gaea.iptable.forbid.iplist");
  		allowIP = allowIP.replaceAll("\\.", "\\\\.")
  				   .replaceAll(",", "|")
  				   .replaceAll("\\*", "\\.\\*");
  		
  		forbidIP = forbidIP.replaceAll("\\.", "\\\\.")
  		  		   .replaceAll(",", "|")
  		  		   .replaceAll("\\*", "\\.\\*");
  		
  		if(allowIP != null && !allowIP.equalsIgnoreCase("")) {
  			allowPattern = Pattern.compile(allowIP);
  		} else {
  			allowPattern = null; //for unit test
  		}
  		if(forbidIP != null && !forbidIP.equalsIgnoreCase("")) {
  			forbidPattern = Pattern.compile(forbidIP);
  		} else {
  			forbidPattern = null; //for unit test
  		}
  	}
  	
  	/**
  	 * check ip is allow
  	 * @param ip
  	 * @return
  	 */
  	public static boolean isAllow(String ip) {
  		if(ip != null && !ip.equalsIgnoreCase("")) {
  			boolean allowMatch = true;
  			boolean forbidMatch = false;
  			
  			if(allowPattern != null) {
  				allowMatch = allowPattern.matcher(ip).find();
  			}
  			if(forbidPattern != null) {
  				forbidMatch = forbidPattern.matcher(ip).find();
  			}
  			
  			return (allowMatch && !forbidMatch); 
  		}
  
  		return false;
  	}
  	
  	/**
  	 * format ip
  	 * @param ip
  	 * @return
  	 */
  	public static String formatIP(String ip) {
  		ip = ip.replaceAll("/", "");
  		ip = ip.substring(0, ip.lastIndexOf(":"));
  		return ip;
  	}
  }