Bug 156912 Proxy problems with birt-viewer.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
}
	/**
	 * Get report locale from Http request.
	 * 
	 * @param request
	 *            http request
	 * @return report locale
	 */
	public static Locale getLocale( HttpServletRequest request )
	{
		Locale locale = null;
		
		locale = getLocaleFromString( getParameter( request, PARAM_LOCALE ) );
		
		if ( locale == null )
			locale = request.getLocale( );
		
		if ( locale == null )
			locale = webAppLocale;
		return locale;
	}
	/**
	 * Check whether the viewer is set rtl option.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isRtl( HttpServletRequest request )
	{
		boolean isRtl = false;