01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.server.rewrite;
30:
31: import javax.servlet.FilterChain;
32: import javax.servlet.ServletException;
33: import javax.servlet.ServletRequest;
34: import javax.servlet.ServletResponse;
35: import javax.servlet.http.HttpServletRequest;
36: import javax.servlet.http.HttpServletResponse;
37: import java.io.IOException;
38:
39: /**
40: * Represents the final servlet in a filter chain.
41: */
42: public class RedirectQueryFilterChain implements FilterChain {
43: // servlet
44: private String _url;
45:
46: /**
47: * Create the redirect filter chain servlet.
48: *
49: * @param url the URL to redirect to.
50: */
51: public RedirectQueryFilterChain(String url) {
52: _url = url;
53: }
54:
55: /**
56: * Invokes the final servlet at the end of the chain.
57: *
58: * @param request the servlet request
59: * @param response the servlet response
60: *
61: * @since Servlet 2.3
62: */
63: public void doFilter(ServletRequest request,
64: ServletResponse response) throws ServletException,
65: IOException {
66: HttpServletRequest req = (HttpServletRequest) request;
67: HttpServletResponse res = (HttpServletResponse) response;
68:
69: String queryString = req.getQueryString();
70:
71: if (queryString == null)
72: res.sendRedirect(res.encodeURL(_url));
73: else if (_url.indexOf('?') < 0)
74: res.sendRedirect(res.encodeURL(_url + '?' + queryString));
75: else
76: res.sendRedirect(res.encodeURL(_url + '&' + queryString));
77: }
78: }
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