Main.java Source code

Introduction

Here is the source code for Main.java

Source

import javax.servlet.http.HttpServletResponse;

/*
 * Copyright 2005 Joe Walker
 *
 * 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.
 */

/**
    
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class Main {
    /**
     * Add headers to prevent browsers and proxies from caching this reply.
     * @param resp The response to add headers to
     */
    public static void addNoCacheHeaders(HttpServletResponse resp) {
        // Set standard HTTP/1.1 no-cache headers.
        resp.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        resp.addHeader("Cache-Control", "post-check=0, pre-check=0");

        // Set standard HTTP/1.0 no-cache header.
        resp.setHeader("Pragma", "no-cache");

        // Set to expire far in the past. Prevents caching at the proxy server
        resp.setHeader("Expires", "Sat, 6 May 1995 12:00:00 GMT");
    }

}