Bug 176786 Issue when use ${env.working.folder} as context path.[0601]
Description: Issue when use ${env.working.folder} as context path Build number:2.2.0.v20070308 Steps to reproduce: 1. Add environment variable as below: env.working.folder(D:\temp\working_folder) env.document.folder (D:\temp\document_folder) env.image.folder(D:\temp\image_folder) 2. Deploy WebViewerExample folder in Tomcat5.5.7 2. Set context parameter as attached with form like ${env.working.folder}. 3. Start Server Expected result: Content inside WebViewerExample folder is untouched. Actual result: After server is started, refresh and check the WebViewerExample folder. Only webcontent and WEB-INF folders are left, other folders and two sample reports disappear. Error log:N/A
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
*/
	public static String getFormat( HttpServletRequest request )
	{
		String format = getParameter( request, PARAM_FORMAT );
		if ( format != null && format.length( ) > 0 )
		{
			if ( PARAM_FORMAT_HTM.equalsIgnoreCase( format ) )
				return PARAM_FORMAT_HTML;
			return format;
		}
		return PARAM_FORMAT_HTML; 
	}
	/**
	 * Get preview max rows.
	 * 
	 * @param request
	 *            http request
	 * @return max rows
	 */
	public static int getMaxRows( HttpServletRequest request )
	{
		int curMaxRows = ParameterAccessor.getParameterAsInt( request,
				PARAM_MAXROWS );
		if ( curMaxRows <= 0 )
			curMaxRows = maxRows;
		return curMaxRows;
	}
	/**
	 * Get report element's iid.
	 *