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: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Sam
28: */
29:
30: package com.caucho.server.rewrite;
31:
32: import com.caucho.util.L10N;
33:
34: import javax.annotation.PostConstruct;
35: import javax.servlet.http.HttpServletRequest;
36: import javax.servlet.http.HttpServletResponse;
37: import java.util.regex.Pattern;
38:
39: /**
40: * A rewrite condition that passes if the value of a named header matches a regexp.
41: */
42: public class HeaderCondition extends AbstractCondition {
43: private static final L10N L = new L10N(HeaderCondition.class);
44:
45: private final String _header;
46: private Pattern _regexp;
47: private boolean _caseInsensitive = false;
48: private boolean _sendVary = true;
49:
50: HeaderCondition(String header) {
51: _header = header;
52: }
53:
54: public String getTagName() {
55: return "header";
56: }
57:
58: public void setRegexp(Pattern pattern) {
59: _regexp = pattern;
60: }
61:
62: public void setCaseInsensitive(boolean caseInsensitive) {
63: _caseInsensitive = caseInsensitive;
64: }
65:
66: public void setSendVary(boolean sendVary) {
67: _sendVary = sendVary;
68: }
69:
70: @PostConstruct
71: public void init() {
72: if (_regexp != null && _caseInsensitive)
73: _regexp = Pattern.compile(_regexp.pattern(),
74: Pattern.CASE_INSENSITIVE);
75: }
76:
77: public boolean isMatch(HttpServletRequest request,
78: HttpServletResponse response) {
79: if (_sendVary)
80: addHeaderValue(response, "Vary", _header);
81:
82: String value = request.getHeader(_header);
83:
84: if (value == null)
85: return false;
86: else
87: return _regexp == null || _regexp.matcher(value).find();
88: }
89: }
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