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
clearTempFiles( );
		
		isInitContext = true;
	}
	/**
	 * Check whether the viewer is used in designer or not.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isDesigner( HttpServletRequest request )
	{
		boolean isDesigner = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_DESIGNER ) ) ) 
		{
			isDesigner = true;
		}
		return isDesigner;
	}
	/***************************************************************************
	 * For export data
	 **************************************************************************/
	/**
	 * Check whether the request is to get image.
	 * 
	 * @param request
	 *            http request
	 * @return is get image or not
	 */
	public static boolean isGetImageOperator( HttpServletRequest request )