blockingfilter.java

来自「Jive是基于JSP/JAVA技术构架的一个大型BBS论坛系统,这是Jive论坛」· Java 代码 · 共 62 行

/*
 * $RCSFile$
 * $Revision: 1.5 $
 * $Date: 2002/07/14 15:44:39 $
 *
 * Copyright (C) 1999-2002 Jive Software. All rights reserved.
 *
 * This software is the proprietary information of Jive Software.
 * Use is subject to license terms.
 */

package com.jivesoftware.util;

import java.io.*;
import javax.servlet.*;
import com.jivesoftware.forum.*;

public class BlockingFilter implements javax.servlet.Filter {

    private String errorPage = "/error.html";

    public void init(FilterConfig filterConfig) throws ServletException {
        // Load up an optional error page
        String errorPageParam = filterConfig.getInitParameter("errorPage");
        if (errorPageParam != null) {
            errorPage = errorPageParam;
        }
    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException
    {
        boolean isBlocking = false;

        // Check the value of the Jive property "blockTraffic". It tells
        // us if we need to change the mode we're in:
        if ("true".equals(JiveGlobals.getJiveProperty("blockTraffic"))) {
            isBlocking = true;
        }
        else {
            isBlocking = false;
        }

        if (isBlocking) {
            response.setContentType("text/html");
            RequestDispatcher rd = request.getRequestDispatcher(errorPage);
            rd.include(request, response);
            return;
        }
        else {
            // Move on..
            chain.doFilter(request, response);
        }

    }

    public void destroy() {
        // Do nothing for now.
    }

}