Bug 161501 [Smoke] Chart can not be previewed in Web Viewer & HTML
Chart can not be previewed in Web Viewer & HTML Steps to reproduce: 1. Create a chart. 2. Preveiw in Web Viewer/ HTML. Expected result: Chart can be previewed. Actual result: No chart is shown.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
* @param config
	 */
	private ReportEngineService( ServletConfig servletConfig )
	{
		System.setProperty( "RUN_UNDER_ECLIPSE", "false" ); 
		if ( servletConfig == null )
		{
			return;
		}
		config = new EngineConfig( );
		
		HTMLEmitterConfig emitterConfig = new HTMLEmitterConfig( );
		emitterConfig.setActionHandler( new HTMLActionHandler( ) );
		imageHandler = new HTMLServerImageHandler( );
		emitterConfig.setImageHandler( imageHandler );
		config.getEmitterConfigs( ).put( "html", emitterConfig ); 
		
		imageDirectory = servletConfig.getServletContext( ).getInitParameter(
				ParameterAccessor.INIT_PARAM_IMAGE_DIR );
		if ( imageDirectory == null || imageDirectory.trim( ).length( ) <= 0
				|| ParameterAccessor.isRelativePath( imageDirectory ) )
		{
			imageDirectory = ParameterAccessor.getRealPath( servletConfig
					.getServletContext( ), "/report/images" ); 
		}
		
		imageBaseUrl = "/run?__imageID="; 
		
		String logDirectory = servletConfig.getServletContext( )
				.getInitParameter( ParameterAccessor.INIT_PARAM_LOG_DIR );