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 import org.eclipse.jetty.util.annotation.Name;
30
31 /**
32 * Rewrite the URI by replacing the matched {@link PathMap} path with a fixed string.
33 */
34 public class RewritePatternRule extends PatternRule implements Rule.ApplyURI
35 {
36 private String _replacement;
37 private String _query;
38
39 /* ------------------------------------------------------------ */
40 public RewritePatternRule()
41 {
42 this(null,null);
43 }
44
45 /* ------------------------------------------------------------ */
46 public RewritePatternRule(@Name("pattern") String pattern, @Name("replacement") String replacement)
47 {
48 super(pattern);
49 _handling = false;
50 _terminating = false;
51 setReplacement(replacement);
52 }
53
54
55 /* ------------------------------------------------------------ */
56 /**
57 * Whenever a match is found, it replaces with this value.
58 *
59 * @param replacement the replacement string.
60 */
61 public void setReplacement(String replacement)
62 {
63 if (replacement==null)
64 {
65 _replacement=null;
66 _query=null;
67 }
68 else
69 {
70 String[] split = replacement.split("\\?", 2);
71 _replacement = split[0];
72 _query = split.length == 2 ? split[1] : null;
73 }
74 }
75
76 /* ------------------------------------------------------------ */
77 @Override
78 public String apply(String target, HttpServletRequest request, HttpServletResponse response) throws IOException
79 {
80 target = URIUtil.addPaths(_replacement, PathMap.pathInfo(_pattern, target));
81 return target;
82 }
83
84 /* ------------------------------------------------------------ */
85 /**
86 * This method will add _query to the requests's queryString and also combine it with existing queryStrings in
87 * the request. However it won't take care for duplicate. E.g. if request.getQueryString contains a parameter
88 * <code>param1 = true</code> and _query will contain <code>param1=false</code> the result will be <code>param1=true&param1=false</code>.
89 * To cover this use case some more complex pattern matching is necessary. We can implement this if there's use
90 * cases.
91 *
92 * @param request the request
93 * @param oldURI the old URI
94 * @param newURI the new URI
95 * @throws IOException if unable to apply the URI
96 */
97 @Override
98 public void applyURI(Request request, String oldURI, String newURI) throws IOException
99 {
100 if (_query == null)
101 {
102 request.setURIPathQuery(newURI);
103 }
104 else
105 {
106 String queryString = request.getQueryString();
107 if (queryString != null)
108 queryString = queryString + "&" + _query;
109 else
110 queryString = _query;
111 request.setURIPathQuery(newURI);
112 request.setQueryString(queryString);
113 }
114 }
115
116 /* ------------------------------------------------------------ */
117 /**
118 * Returns the replacement string.
119 */
120 @Override
121 public String toString()
122 {
123 return super.toString()+"["+_replacement+"]";
124 }
125 }