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Java > Open Source Codes > org > mortbay > servlet > WelcomeFilter


1 // ========================================================================
2 // $Id: WelcomeFilter.java,v 1.3 2004/05/09 20:32:41 gregwilkins Exp $
3 // Copyright 199-2004 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 // ========================================================================
15
16 package org.mortbay.servlet;
17 import java.io.IOException JavaDoc;
18
19 import javax.servlet.Filter JavaDoc;
20 import javax.servlet.FilterChain JavaDoc;
21 import javax.servlet.FilterConfig JavaDoc;
22 import javax.servlet.ServletException JavaDoc;
23 import javax.servlet.ServletRequest JavaDoc;
24 import javax.servlet.ServletResponse JavaDoc;
25 import javax.servlet.http.HttpServletRequest JavaDoc;
26
27 /* ------------------------------------------------------------ */
28 public class WelcomeFilter implements Filter JavaDoc
29 {
30     private String JavaDoc welcome;
31     
32     public void init(FilterConfig JavaDoc filterConfig)
33     {
34         welcome=filterConfig.getInitParameter("welcome");
35     }
36
37     /* ------------------------------------------------------------ */
38     public void doFilter(ServletRequest JavaDoc request,
39                          ServletResponse JavaDoc response,
40                          FilterChain JavaDoc chain)
41     throws IOException JavaDoc, ServletException JavaDoc
42     {
43         String JavaDoc path=((HttpServletRequest JavaDoc)request).getServletPath();
44         if (welcome!=null && path.endsWith("/"))
45             request.getRequestDispatcher(path+welcome).forward(request,response);
46         else
47             chain.doFilter(request, response);
48     }
49
50     public void destroy() {}
51 }
52
53
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