cookieutils.java

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// Copyright 2005-2007 onetsoft.com
//
// 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 com.onetsoft.fastjsp.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author <a href="mailto:[e-mail]">hgw</a>
 */
public class CookieUtils {

    public static Cookie getCookie(HttpServletRequest request, String cookieName) {
        Cookie cookies[] = request.getCookies();
        if (cookies == null || cookieName == null || cookieName.length() == 0)
            return null;
        Cookie cookie = null;
        for (int i = 0; i < cookies.length; i++) {
            if (cookies[i].getName().equals(cookieName)) {
                cookie = cookies[i];
                break;
            }
        }
        return cookie;
    }

    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, Cookie cookie) {
        if (cookie != null) {
            String path = request.getContextPath() != null ? request.getContextPath() :StringUtils.SPLASH;
            if (StringUtils.EMPTY.equals(path))
                path = StringUtils.SPLASH;
            cookie.setPath(path);
            cookie.setValue(StringUtils.EMPTY);
            cookie.setMaxAge(0);
            response.addCookie(cookie);
        }
    }

    /**
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param maxAge      max lifetime in seconds
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int maxAge) {
        if (cookieValue == null)
            cookieValue = StringUtils.EMPTY;
        String path = request.getContextPath() != null ? request.getContextPath() : StringUtils.SPLASH;
        if (StringUtils.EMPTY.equals(path))
            path = StringUtils.SPLASH;
        Cookie cookie = new Cookie(cookieName, cookieValue);
        cookie.setMaxAge(maxAge);
        cookie.setPath(path);
        response.addCookie(cookie);
    }
}