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From BrianWilliams <brianwilliams33...@yahoo.com>
Subject Generating spreadsheet to send to Client fails in 1.6
Date Wed, 31 Jul 2013 17:13:34 GMT

I had code in Wicket 1.x that worked perfectly to dynamically generate a
spreadsheet and send it to the user.  I had to rewrite it for the new
Response classes in 1.6:

    public void generateExcel(String filename, List<List&lt;? extends
Object>> dataList) {
        HSSFWorkbook myWorkBook = new HSSFWorkbook();
        HSSFSheet mySheet = myWorkBook.createSheet();
        ... (generate sheet from dataList using HSSFSheet methods)
        WebResponse response = (WebResponse)getResponse();
        webResponse.setAttachmentHeader(filename + ".xls");
        OutputStream out = webResponse.getOutputStream();

The sheet is still being populated as I need, and the client is asked to
open or save the <filename>.xls file (as expected).

The problem with 1.6 is: the current page is sent rather than the sheet I've
built.   My .xls viewer complains that the file is not in the correct format
and, when I display it anyway, contains the original Wicket page, head, css,
javascript and all.

The same problems happens when generating xml from the same data list:

    WebResponse response = (WebResponse)getResponse();
    response.setAttachmentHeader(filename + ".xml");
    XMLStreamWriter out =

    ... (generate XML document from dataList)

This also sends the original HTML page to the client. 

Both methods worked perfectly before I migrated to Wicket 1.6, but now the
Response (returned by getResponse()) seems to behave differently.  Any
ideas?  Thank you very much.

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