io.renren.common.utils.IPUtils.java Source code

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Here is the source code for io.renren.common.utils.IPUtils.java

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/**
 * Copyright 2018 ? http://www.renren.io
 * <p>
 * Licensed 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 io.renren.common.utils;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;

/**
 * IP?
 * 
 * @author chenshun
 * @email sunlightcs@gmail.com
 * @date 201738 ?12:57:02
 */
public class IPUtils {
    private static Logger logger = LoggerFactory.getLogger(IPUtils.class);

    /**
     * ?IP?
     * 
     * Nginx???? ?request.getRemoteAddr()?IP?
     * ?????X-Forwarded-For?IP?X-Forwarded-For?unknownIPIP?
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            logger.error("IPUtils ERROR ", e);
        }

        //        //??IP?
        //        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
        //         if(ip.indexOf(",") > 0) {
        //            ip = ip.substring(0, ip.indexOf(","));
        //         }
        //      }

        return ip;
    }

}