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1 package org.jahia.urls;
2
3 import java.io.ByteArrayOutputStream  ;
4 import java.io.IOException ;
5
6
14
15 public class URICodec {
16
17 private static org.apache.log4j.Logger logger =
18 org.apache.log4j.Logger.getLogger (URICodec.class);
19
20 private static final String hexString = "0123456789ABCDEF";
21
22 public static final String ALPHANUM_CHARS =
23 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
24 public static final String MARK_CHARS = "-_.!~*'()";
25 public static final String UNRESERVED_CHARS = ALPHANUM_CHARS + MARK_CHARS;
26
36 public static final String RESERVED_CHARS =
37 ";/?:@&=$,";
38 public static final String AUTHORITY_AUTHORIZEDCHARS = UNRESERVED_CHARS + "$,;:@&=";
39 public static final String PATH_AUTHORIZEDCHARS = UNRESERVED_CHARS + "/;:@&=$,";
40
41 public static final String QUERY_AUTHORIZEDCHARS = UNRESERVED_CHARS + "=&";
42 public static final String FRAGMENT_AUTHORIZEDCHARS = UNRESERVED_CHARS;
43
44 public static final String DEFAULT_AUTHORIZEDCHARS = ALPHANUM_CHARS +
45 MARK_CHARS + RESERVED_CHARS;
46
47 private static String defaultEncoding = "UTF-8";
49 private static String defaultAuthorizedChars = DEFAULT_AUTHORIZEDCHARS;
50
51 public static String encode(String input, String encoding, String authorizedChars)
52 throws java.io.UnsupportedEncodingException {
53 if ((input == null) || (encoding == null)) {
54 return null;
55 }
56 StringBuffer result = new StringBuffer ();
57 for (int i = 0; i < input.length(); i++) {
58 String curChar = input.substring(i, i+1);
59 if (authorizedChars.indexOf(curChar) == -1) {
60 byte[] charBytes = curChar.getBytes(encoding);
64 for (int j=0; j < charBytes.length; j++) {
65 result.append("%");
66 char hiHex = hexString.charAt((charBytes[j] & 0xFF) >> 4);
67 result.append(hiHex);
68 char lowHex = hexString.charAt(charBytes[j] & 0xF);
69 result.append(lowHex);
70 }
71 } else {
72 result.append(curChar);
73 }
74 }
75 return result.toString();
76 }
77
78 public static String encode(String input, String authorizedChars)
79 throws java.io.UnsupportedEncodingException {
80 return encode(input, defaultEncoding, authorizedChars);
81 }
82
83 public static String encode(String input)
84 throws java.io.UnsupportedEncodingException {
85 return encode(input, defaultEncoding, defaultAuthorizedChars );
86 }
87
88 public static String decode(String input, String encoding)
89 throws java.io.UnsupportedEncodingException {
90 if ((input == null) || (encoding == null)) {
91 return null;
92 }
93 ByteArrayOutputStream byteOut = new ByteArrayOutputStream ();
94 int currentPos = 0;
95 try {
96 while ( (input.indexOf("%", currentPos) != -1) &&
97 (currentPos < input.length())) {
98 int encodedBytePos = input.indexOf("%", currentPos);
99 if (encodedBytePos > currentPos) {
100 byteOut.write(input.substring(currentPos, encodedBytePos).
101 getBytes(encoding));
102 }
103 char hiHexChar = input.charAt(encodedBytePos + 1);
104 char lowHexChar = input.charAt(encodedBytePos + 2);
105 int hiHex = hexString.indexOf(hiHexChar);
106 int lowHex = hexString.indexOf(lowHexChar);
107 if ( (hiHex >= 0) && (lowHex >= 0)) {
108 byte curByte = (byte) (( (hiHex << 4) + lowHex) & 0xFF);
109 byteOut.write(curByte);
110 currentPos = encodedBytePos + 3;
111 } else {
112 currentPos = encodedBytePos + 1;
113 }
114 }
115 byteOut.write(input.substring(currentPos).getBytes(encoding));
116 byteOut.flush();
117 } catch (IOException ioe) {
118 logger.error("Error while writing to ByteArrayOutputStream", ioe);
119 }
120 return byteOut.toString(encoding);
121 }
122
123 public static String decode(String input)
124 throws java.io.UnsupportedEncodingException {
125 return decode(input, defaultEncoding);
126 }
127
128 static public String getDefaultEncoding() {
129 return defaultEncoding;
130 }
131
132 static public void setDefaultEncoding(String encoding) {
133 defaultEncoding = encoding;
134 }
135
136 static public String getDefaultAuthorizedChars () {
137 return defaultAuthorizedChars;
138 }
139
140 static public void setDefaultAuthorizedChars (String authorizedChars) {
141 defaultAuthorizedChars = authorizedChars;
142 }
143
144 }
145 |
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