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Java > Open Source Codes > com > caucho > util > URLUtil


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * 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.util;
30
31 /**
32  * URL utilities.
33  */
34 public class URLUtil {
35   /**
36    * Encode the url with '%' encoding.
37    */
38   public static String JavaDoc encodeURL(String JavaDoc uri)
39   {
40     CharBuffer cb = CharBuffer.allocate();
41
42     for (int i = 0; i < uri.length(); i++) {
43       char ch = uri.charAt(i);
44
45       switch (ch) {
46       case '<':
47       case '>':
48       case ' ':
49       case '%':
50       case '\'':
51       case '\"':
52         cb.append('%');
53         cb.append(encodeHex(ch >> 4));
54         cb.append(encodeHex(ch));
55         break;
56
57       default:
58         cb.append(ch);
59       }
60     }
61
62     return cb.close();
63   }
64
65   public static String JavaDoc byteToHex(int b)
66   {
67     CharBuffer cb = CharBuffer.allocate();
68
69     cb.append(encodeHex((b & 0xf0) >> 4));
70     cb.append(encodeHex(b & 0xf));
71
72     return cb.close();
73   }
74
75   public static char encodeHex(int ch)
76   {
77     ch &= 0xf;
78
79     if (ch < 10)
80       return (char) (ch + '0');
81     else
82       return (char) (ch + 'a' - 10);
83   }
84 }
85
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