Excpetion after link is clicked for file download on same page

Question

I have implemented a module in JSF where the page displays a datatable and one the columns is a command link which when clicked opens up a dialog box to save a CLOB from the DB as a csv on the local desktop.
All this is working fine.
The problem is that once the user clicks on one link in the datatable and then the user again clicks on any other link on the page or tries to use the Logout link the page is directed to the welcome page.
The problem is happening because of the <h:commandLink> causes the page to submit and thereafter any click on the page causes the page to go to the homepage.
// Constants ----------------------------------------------------------------------------------
  private static final int DEFAULT_BUFFER_SIZE = 102400; // 100 KB.
  // Actions ------------------------------------------------------------------------------------
  public void downloadcsv()
    throws IOException, ServiceLocatorException, ReportServiceException
    ReportSummary selectedReportId =
      (ReportSummary) summaryBindingReport.getRowData();
    ReportContent reportObj =
      getReportService().getReportContent(selectedReportId.getReportId());
    // Prepare.
    FacesContext facesContext = FacesContext.getCurrentInstance();
    ExternalContext externalContext = facesContext.getExternalContext();
    HttpServletResponse response =
      (HttpServletResponse) externalContext.getResponse();
    BufferedInputStream input = null;
    BufferedOutputStream output = null;
    try
      // Init servlet response.
      response.reset();
      response.setContentType("plain/text");
      response.setHeader("Content-disposition",
                         "inline; filename=\"" + selectedReportId.getReportName() +
      output =
          new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);
      char[] strReportContent = reportObj.getReportText();
      Utility.logMessage(Constants.SEVERITY_INFO,
                         "**** Report Content ****" +
                         String.valueOf(strReportContent), this);
      // Write the Report Content as Comma Separated values
      output.write(String.valueOf(strReportContent).getBytes(), 0,
                   strReportContent.length);
      // Finalize task.
      output.flush();
    finally
      // Close streams.
      close(output);
      close(input);
//    ReportCriteria reportSearchCriteria = new ReportCriteria();
//    reportSearchCriteria.setSubSystemCode("AC");
//    setManagedBeanValue("reportList",
//                          getReportService().searchByCriteria(reportSearchCriteria));
    // Inform JSF that it doesn't need to handle response.
    // This is very important, otherwise you will get the following exception in the logs:
    // java.lang.IllegalStateException: Cannot forward after response has been committed.
        facesContext.getRenderResponse();
    facesContext.responseComplete();
//    return "reportSummary";
  private static void close(Closeable resource)
    if (resource != null)
      try
        resource.close();
      catch (IOException e)
        e.printStackTrace();
  public void setSummaryBindingReport(HtmlDataTable summaryBinding)
    this.summaryBindingReport = summaryBinding;
  public HtmlDataTable getSummaryBindingReport()
    return summaryBindingReport;
  }

Answer 1

There are two ways to do this.
1. you create a modern day css-file with the classes for the
links you want colored, which is preferred in XHTML-environments.
a. go to Edit, Administer websites, choose your website
b. Users and roles is selected, pick you role (administrator
I presume) and choose Edit Role-settings
c. pick Styles and Fonts
d. form the drop-down list behind Style-support, choose
Document level css
e. pick: Show only CSS styles included in this CSS file
(pick the file you created)
f. use the classes in editing mode for your secific links
g. done
2. you change the role-settings and do it the old-fashioned
way make it possible to use font-tags and use HTML for the source
code
a. go to Edit, Administer websites, choose your website
b. Users and roles is selected, pick you role (administrator
I presume) and choose Edit Role-settings
c. pick Styles and Fonts
d. form the drop-down list behind Style-support, choose HTML
tags (<font etc....
e. done
Have fun editing
Hayo