Bug 156912 Proxy problems with birt-viewer.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
try
			{
				UTFString = new String( s.getBytes( sourceEncoding ),
						UTF_8_ENCODE );
			}
			catch ( UnsupportedEncodingException e )
			{
				UTFString = s;
			}
		}
		return UTFString;
	}
	/**
	 * URL encoding based on incoming encoding format.
	 * 
	 * @param s
	 *            string to be encoded.
	 * @param format
	 *            encoding format.
	 * @return
	 */
	protected static String urlEncode( String s, String format )
	{
		assert ISO_8859_1_ENCODE.equalsIgnoreCase( format )
				|| UTF_8_ENCODE.equalsIgnoreCase( format );
		String encodedString = s;
		if ( s != null )
		{
			try
			{