Normalize Post Data : HTML Output « Servlets « Java

Normalize Post Data

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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" );

            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 )

              sb.append( postData.charAt(i) );

      if( sb.length() < 2 || !sb.substring( sb.length()-2 ).equals("\r\n") )
          sb.append( "\r\n" );

      return sb.toString();



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