net.duckling.ddl.util.ClientValidator.java Source code

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Here is the source code for net.duckling.ddl.util.ClientValidator.java

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/*
 * Copyright (c) 2008-2016 Computer Network Information Center (CNIC), Chinese Academy of Sciences.
 * 
 * This file is part of Duckling project.
 *
 * 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 net.duckling.ddl.util;

import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

import net.duckling.ddl.common.VWBContext;
import net.duckling.ddl.constant.KeyConstants;
import net.duckling.ddl.service.url.UrlPatterns;

import org.apache.commons.lang.StringUtils;

public class ClientValidator {

    private static Pattern ddlIpPattern;

    /**
     * ??ip
     * @param request
     * @return
     */
    public static boolean validate(HttpServletRequest request) {
        Pattern pattern = getClientIpPattern(request);
        if (pattern == null) {
            return false;
        }
        String realIp = getRealIp(request);
        return pattern.matcher(realIp).matches();
    }

    public static String getRealIp(HttpServletRequest request) {
        String nginxIp = request.getHeader("x-real-ip");
        if (StringUtils.isNotEmpty(nginxIp)) {
            return nginxIp;
        }
        return request.getRemoteAddr();
    }

    public static Pattern getClientIpPattern(HttpServletRequest request) {
        if (ddlIpPattern == null) {
            initIpPattren(request);
        }
        return ddlIpPattern;
    }

    private static synchronized void initIpPattren(HttpServletRequest request) {
        if (ddlIpPattern == null) {
            VWBContext context = VWBContext.createContext(request, UrlPatterns.ADMIN);
            String pattern = context.getContainer().getProperty(KeyConstants.DDL_CLIENT_ACCEPTED_IP);
            if (pattern == null || pattern.length() == 0) {
                return;
            }
            ddlIpPattern = Pattern.compile(pattern);
        }
    }
}