RemoteAddresses.java

/*
 * Copyright (C) 2014 Toshiaki Maki
 *
 * 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
 *
 *     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 am.ik.categolj2.core.web;

import com.google.common.net.HttpHeaders;
import org.apache.commons.lang3.StringUtils;

import javax.servlet.http.HttpServletRequest;

public class RemoteAddresses {

    public static String getRemoteAddress(HttpServletRequest request) {
        String forwardedFor = request.getHeader(HttpHeaders.X_FORWARDED_FOR);
        String result;
        if (forwardedFor != null) {
            result = forwardedFor;
        } else {
            result = request.getRemoteAddr();
        }
        return StringUtils.substring(result, 0, 128);
    }
}