/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.base.util;
import java.io.UnsupportedEncodingException;
/**
* Creation-Date: Jan 22, 2007, 4:36:38 PM
*
* @author Thomas Morgner moved by Tyler Band
*/
public class URLEncoder {
private URLEncoder() {
}
private static final String[] hex = {
"%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07",
"%08", "%09", "%0A", "%0B", "%0C", "%0D", "%0E", "%0F",
"%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17",
"%18", "%19", "%1A", "%1B", "%1C", "%1D", "%1E", "%1F",
"%20", "%21", "%22", "%23", "%24", "%25", "%26", "%27",
"%28", "%29", "%2A", "%2B", "%2C", "%2D", "%2E", "%2F",
"%30", "%31", "%32", "%33", "%34", "%35", "%36", "%37",
"%38", "%39", "%3A", "%3B", "%3C", "%3D", "%3E", "%3F",
"%40", "%41", "%42", "%43", "%44", "%45", "%46", "%47",
"%48", "%49", "%4A", "%4B", "%4C", "%4D", "%4E", "%4F",
"%50", "%51", "%52", "%53", "%54", "%55", "%56", "%57",
"%58", "%59", "%5A", "%5B", "%5C", "%5D", "%5E", "%5F",
"%60", "%61", "%62", "%63", "%64", "%65", "%66", "%67",
"%68", "%69", "%6A", "%6B", "%6C", "%6D", "%6E", "%6F",
"%70", "%71", "%72", "%73", "%74", "%75", "%76", "%77",
"%78", "%79", "%7A", "%7B", "%7C", "%7D", "%7E", "%7F",
"%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87",
"%88", "%89", "%8A", "%8B", "%8C", "%8D", "%8E", "%8F",
"%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97",
"%98", "%99", "%9A", "%9B", "%9C", "%9D", "%9E", "%9F",
"%A0", "%A1", "%A2", "%A3", "%A4", "%A5", "%A6", "%A7",
"%A8", "%A9", "%AA", "%AB", "%AC", "%AD", "%AE", "%AF",
"%B0", "%B1", "%B2", "%B3", "%B4", "%B5", "%B6", "%B7",
"%B8", "%B9", "%BA", "%BB", "%BC", "%BD", "%BE", "%BF",
"%C0", "%C1", "%C2", "%C3", "%C4", "%C5", "%C6", "%C7",
"%C8", "%C9", "%CA", "%CB", "%CC", "%CD", "%CE", "%CF",
"%D0", "%D1", "%D2", "%D3", "%D4", "%D5", "%D6", "%D7",
"%D8", "%D9", "%DA", "%DB", "%DC", "%DD", "%DE", "%DF",
"%E0", "%E1", "%E2", "%E3", "%E4", "%E5", "%E6", "%E7",
"%E8", "%E9", "%EA", "%EB", "%EC", "%ED", "%EE", "%EF",
"%F0", "%F1", "%F2", "%F3", "%F4", "%F5", "%F6", "%F7",
"%F8", "%F9", "%FA", "%FB", "%FC", "%FD", "%FE", "%FF"
};
/**
* Encode a string according to RFC 1738.
* <p/>
* <quote> "...Only alphanumerics [0-9a-zA-Z], the special characters "$-_.+!*'()," [not including the quotes - ed],
* and reserved characters used for their reserved purposes may be used unencoded within a URL."</quote>
* <p/>
* <ul> <li><p>The ASCII characters 'a' through 'z', 'A' through 'Z', and '0' through '9' remain the same.
* <p/>
* <li><p>The unreserved characters - _ . ! ~ * ' ( ) remain the same.
* <p/>
* <li><p>All other ASCII characters are converted into the 3-character string "%xy", where xy is the two-digit
* hexadecimal representation of the character code
* <p/>
* <li><p>All non-ASCII characters are encoded in two steps: first to a sequence of 2 or 3 bytes, using the UTF-8
* algorithm; secondly each of these bytes is encoded as "%xx". </ul>
* <p/>
* This method was adapted from http://www.w3.org/International/URLUTF8Encoder.java Licensed under
* http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
*
* @param s The string to be encoded
* @return The encoded string
*/
public static String encodeUTF8( final String s ) {
final StringBuffer sbuf = new StringBuffer( s.length() );
final char[] sChars = s.toCharArray();
final int len = sChars.length;
for ( int i = 0; i < len; i++ ) {
final int ch = sChars[ i ];
if ( 'A' <= ch && ch <= 'Z' ) { // 'A'..'Z'
sbuf.append( (char) ch );
} else if ( 'a' <= ch && ch <= 'z' ) { // 'a'..'z'
sbuf.append( (char) ch );
} else if ( '0' <= ch && ch <= '9' ) { // '0'..'9'
sbuf.append( (char) ch );
} else if ( ch == '-' || ch == '_' // unreserved
|| ch == '.' || ch == '!'
|| ch == '~' || ch == '*'
|| ch == '\'' || ch == '('
|| ch == ')' ) {
sbuf.append( (char) ch );
} else if ( ch <= 0x007f ) { // other ASCII
sbuf.append( hex[ ch ] );
} else if ( ch <= 0x07FF ) { // non-ASCII <= 0x7FF
sbuf.append( hex[ 0xc0 | ( ch >> 6 ) ] );
sbuf.append( hex[ 0x80 | ( ch & 0x3F ) ] );
} else { // 0x7FF < ch <= 0xFFFF
sbuf.append( hex[ 0xe0 | ( ch >> 12 ) ] );
sbuf.append( hex[ 0x80 | ( ( ch >> 6 ) & 0x3F ) ] );
sbuf.append( hex[ 0x80 | ( ch & 0x3F ) ] );
}
}
return sbuf.toString();
}
private static String encodeBytes( final byte[] s ) {
final StringBuffer sbuf = new StringBuffer( s.length );
final int len = s.length;
for ( int i = 0; i < len; i++ ) {
final int ch = ( s[ i ] & 0xff );
if ( 'A' <= ch && ch <= 'Z' ) { // 'A'..'Z'
sbuf.append( (char) ch );
} else if ( 'a' <= ch && ch <= 'z' ) { // 'a'..'z'
sbuf.append( (char) ch );
} else if ( '0' <= ch && ch <= '9' ) { // '0'..'9'
sbuf.append( (char) ch );
} else if ( ch == '-' || ch == '_' // unreserved
|| ch == '.' || ch == '!'
|| ch == '~' || ch == '*'
|| ch == '\'' || ch == '('
|| ch == ')' ) {
sbuf.append( (char) ch );
} else { // other ASCII
sbuf.append( hex[ ch ] );
}
}
return sbuf.toString();
}
public static String encode( final String s, final String encoding )
throws UnsupportedEncodingException {
if ( "utf-8".equalsIgnoreCase( encoding ) ) {
return encodeUTF8( s );
}
return encodeBytes( s.getBytes( encoding ) );
}
}