90 lines
3.0 KiB
Java
Executable File
90 lines
3.0 KiB
Java
Executable File
/*
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* Copyright (C) 2002-2004 Red Hat Inc. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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package com.arsdigita.web;
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import com.arsdigita.util.Assert;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.ServletConfig;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpServlet;
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import org.apache.log4j.Logger;
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/**
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* The prefixer servlet adds prefixes to chosen classes of requests.
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* This is useful if you wish to migrate users off the old dispatcher to
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* the new dispatcher, which uses a prefix for URLs. The following
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* snippet assumes your dispatcher is mapped to "/ccm/*".
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*
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* Used by a web.xml entry. (cf. web.xml-core-optional.in)
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*
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* @author Justin Ross <<a href="mailto:jross@redhat.com">jross@redhat.com</a>>
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* @version $Id: PrefixerServlet.java 287 2005-02-22 00:29:02Z sskracic $
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*/
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public class PrefixerServlet extends HttpServlet {
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private static final Logger s_log = Logger.getLogger(PrefixerServlet.class);
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public static final String PREFIX_PARAMETER = "prefix";
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private String m_prefix = null;
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public final void init() throws ServletException {
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final ServletConfig config = getServletConfig();
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m_prefix = config.getInitParameter(PREFIX_PARAMETER);
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Assert.exists(m_prefix, "String m_prefix");
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Assert.isTrue(m_prefix.startsWith("/"),
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"The target prefix must start with a '/'");
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}
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protected final void service(final HttpServletRequest sreq,
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final HttpServletResponse sresp)
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throws IOException, ServletException {
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final StringBuffer buffer = new StringBuffer();
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buffer.append(sreq.getContextPath());
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buffer.append(m_prefix);
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buffer.append(sreq.getServletPath());
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final String pathInfo = sreq.getPathInfo();
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if (pathInfo != null) {
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buffer.append(pathInfo);
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}
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final String queryString = sreq.getQueryString();
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if (queryString != null) {
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buffer.append("?");
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buffer.append(queryString);
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}
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final String result = sresp.encodeRedirectURL(buffer.toString());
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sresp.sendRedirect(result);
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}
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public final void destroy() {
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m_prefix = null;
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}
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}
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