Bug 158935 [2.2.0][Smoke]PDF can not preview anything by IE
Details: [2.2.0][Smoke]PDF can not preview anything by IE Step: 1.New a report and add a label 2.Preview as PDF Actual resutl: Can not preview anything Excepted resutl: Preview the label by PDF
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/servlet/BirtEngineServlet.java
getServletContext( ), options );
		return new BirtContext( request, response );
	}
	/**
	 * Local authentication.
	 * 
	 * @param request incoming http request
	 * @param response http response
	 * @return
	 */
	protected boolean __authenticate( HttpServletRequest request, HttpServletResponse response )
	{
		return true;
	}
	/**
	 * Local do get.
	 */
	protected void __doGet( IContext context ) throws ServletException, IOException, BirtException
	{
		
		context.getResponse( ).setHeader("Pragma","No-cache");   
		context.getResponse( ).setHeader("Cache-Control","no-cache");  
		context.getResponse( ).setHeader("Cache-Control","no-store"); 
		context.getResponse( ).setDateHeader("Expires", 0);  
		
		ViewerAttributeBean bean = ( ViewerAttributeBean ) context.getBean( );
		if ( IBirtConstants.SERVLET_PATH_RUN.equalsIgnoreCase(
				context.getRequest( ).getServletPath( ) )
				&& bean != null
				&& bean.isMissingParameter( ) )