Normalize Post Data
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JSPWiki - a JSP-based WikiWiki clone.
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"License"); you may not use this file except in compliance
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KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
import java.security.SecureRandom;
import java.util.Properties;
import java.util.Random;
public class StringUtils
{
/**
* Makes sure that the POSTed data is conforms to certain rules. These
* rules are:
* <UL>
* <LI>The data always ends with a newline (some browsers, such
* as NS4.x series, does not send a newline at the end, which makes
* the diffs a bit strange sometimes.
* <LI>The CR/LF/CRLF mess is normalized to plain CRLF.
* </UL>
*
* The reason why we're using CRLF is that most browser already
* return CRLF since that is the closest thing to a HTTP standard.
*
* @param postData The data to normalize
* @return Normalized data
*/
public static String normalizePostData( String postData )
{
StringBuffer sb = new StringBuffer();
for( int i = 0; i < postData.length(); i++ )
{
switch( postData.charAt(i) )
{
case 0x0a: // LF, UNIX
sb.append( "\r\n" );
break;
case 0x0d: // CR, either Mac or MSDOS
sb.append( "\r\n" );
// If it's MSDOS, skip the LF so that we don't add it again.
if( i < postData.length()-1 && postData.charAt(i+1) == 0x0a )
{
i++;
}
break;
default:
sb.append( postData.charAt(i) );
break;
}
}
if( sb.length() < 2 || !sb.substring( sb.length()-2 ).equals("\r\n") )
{
sb.append( "\r\n" );
}
return sb.toString();
}
}
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