/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
package java.net;
import java.io.UnsupportedEncodingException;
public class URLEncoder {
private URLEncoder() {}
private static final String allowed = "-_.*";
private static final String hex="0123456789abcdef";
public static String encode(String str){
int len = str.length();
// we take a guess that we will encounter a maximum of 10 chars to be replaced by '%xx'
// if more of such cases occur, the StringBuffer wil need to grow ...
StringBuffer buf = new StringBuffer(len+10);
char c;
for (int i = 0 ; i < len ; i++) {
c = str.charAt(i);
if (Character.isLetterOrDigit(c) || allowed.indexOf(c) != -1) {
buf.append(c);
}
else {
if (c == ' ') {
buf.append('+');
}
else {
buf.append('%');
buf.append(hex.charAt((c&0xff)/16));
buf.append(hex.charAt(c%16));
}
}
}
return buf.toString();
}
public static String encode(String str, String enc) throws UnsupportedEncodingException {
int len = str.length();
// we take a guess that we will encounter a maximum of 10 chars to be replaced by '%xx'
// if more of such cases occur, the StringBuffer wil need to grow ...
StringBuffer buf = new StringBuffer(len + 10);
for (int i = 0; i < len; i++) {
char c = str.charAt(i);
if (Character.isLetterOrDigit(c) || allowed.indexOf(c) != -1) {
buf.append(c);
} else {
if (c == ' ') {
buf.append('+');
} else {
byte[] bytes = new String(new char[]{c}).getBytes(enc);
for (int j=0; j < bytes.length ; j++) {
buf.append('%');
int b = bytes[j];
buf.append(hex.charAt((b & 0xff) / 16));
buf.append(hex.charAt(b % 16));
}
}
}
}
return buf.toString();
}
}