Bug 200812 Issue when remove one separator setting in viewer.property[0002]
Description: Issue when remove one separator setting in viewer.property Build number:2.2.1.v200708220927 Steps to reproduce: 1. Deploy birt. 2. Open viewer.properties under WEB-INF folder. 3. Delete "viewer.sep.0=," line 4. Start server. 5. Preview report. 6. Export Data, select columns and select "Comma(,)", click OK. Expected result: Comma(,) isn't in the separator list. Actual result: Nothing happened after step6 and no error logs. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
private static boolean makeDir( String path )
	{
		assert path != null;
		File file = new File( path );
		if ( !file.exists( ) )
			return file.mkdirs( );
		return true;
	}
	/**
	 * Returns the temp image folder with session id
	 * 
	 * @param request
	 * @return
	 */
	public static String getImageTempFolder( HttpServletRequest request )
	{
		String tempFolder = imageFolder;
		
		String sessionId = request.getSession( ).getId( );
		if ( sessionId != null )
			tempFolder = tempFolder + File.separator + sessionId;
		return tempFolder;
	}
	/**
	 * Clear the temp files when session is expired
	 * 
	 * @param sessionId
	 */
	public static void clearSessionFiles( String sessionId )
	{