1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.rewrite.handler;
20
21 import java.io.IOException;
22
23 import javax.servlet.http.HttpServletRequest;
24 import javax.servlet.http.HttpServletResponse;
25
26 import org.eclipse.jetty.http.PathMap;
27 import org.eclipse.jetty.server.Request;
28 import org.eclipse.jetty.util.URIUtil;
29
30 /**
31 * Rewrite the URI by replacing the matched {@link PathMap} path with a fixed string.
32 */
33 public class RewritePatternRule extends PatternRule implements Rule.ApplyURI
34 {
35 private String _replacement;
36 private String _query;
37
38 /* ------------------------------------------------------------ */
39 public RewritePatternRule()
40 {
41 _handling = false;
42 _terminating = false;
43 }
44
45 /* ------------------------------------------------------------ */
46 /**
47 * Whenever a match is found, it replaces with this value.
48 *
49 * @param replacement the replacement string.
50 */
51 public void setReplacement(String replacement)
52 {
53 String[] split = replacement.split("\\?", 2);
54 _replacement = split[0];
55 _query = split.length == 2 ? split[1] : null;
56 }
57
58 /* ------------------------------------------------------------ */
59 @Override
60 public String apply(String target, HttpServletRequest request, HttpServletResponse response) throws IOException
61 {
62 target = URIUtil.addPaths(_replacement, PathMap.pathInfo(_pattern, target));
63 return target;
64 }
65
66 /* ------------------------------------------------------------ */
67 /**
68 * This method will add _query to the requests's queryString and also combine it with existing queryStrings in
69 * the request. However it won't take care for duplicate. E.g. if request.getQueryString contains a parameter
70 * <code>param1 = true</code> and _query will contain <code>param1=false</code> the result will be <code>param1=true&param1=false</code>.
71 * To cover this use case some more complex pattern matching is necessary. We can implement this if there's use
72 * cases.
73 *
74 * @param request the request
75 * @param oldURI the old URI
76 * @param newURI the new URI
77 * @throws IOException if unable to apply the URI
78 */
79 @Override
80 public void applyURI(Request request, String oldURI, String newURI) throws IOException
81 {
82 if (_query == null)
83 {
84 request.setURIPathQuery(newURI);
85 }
86 else
87 {
88 String queryString = request.getQueryString();
89 if (queryString != null)
90 queryString = queryString + "&" + _query;
91 else
92 queryString = _query;
93 request.setURIPathQuery(newURI);
94 request.setQueryString(queryString);
95 }
96 }
97
98 /* ------------------------------------------------------------ */
99 /**
100 * Returns the replacement string.
101 */
102 @Override
103 public String toString()
104 {
105 return super.toString()+"["+_replacement+"]";
106 }
107 }