Re: onSubmitComplete not fired

From the javadoc:

The back-end server is expected to respond with a content-type of 'text/html', meaning that the text returned will be treated as HTML. If any other content-type is specified by the server, then the result HTML sent in the onFormSubmit event will be unpredictable across browsers, and the onSubmitComplete event may not fire at all.

— Source: http://www.gwtproject.org/javadoc/latest/com/google/gwt/user/client/ui/FormPanel.html#FormPanel()

If I were you, I'd store the file on the server side and send back a link to it (and delete the file when the user's session ends, or after some delay). You can then "parse" the body in the onSubmitComplete and open the link in a window or hidden iframe (and display the link as a… link, so users can click it in case download doesn't automatically start).

The next step is to replace the FormPanel with XMLHttpRequest + FormData. There's no GWT API for them for now, but I'd expect GWT 3.0 to provide them (through Elemental). They're definitely the way forward if you don't have to support age-old browsers (you could still fallback to FormPanel for those browsers though, just with a degraded experience as you're unable to accurately handle errors)

On Wednesday, September 17, 2014 7:28:07 PM UTC+2, am...@digiwincorp.com wrote:

I have this scenario I couldn't get right, so any insights are
apreciated:

A FormPanel contains a FileUpload widget, and the server returns a
downloadable content:

response.setContentType("application/x-download");
response.setHeader("Content-Disposition", "attachment; filename=" +
campaignId + ".xml");

Now, the problem is that altough the upload succedes, and the server
generated content is perfectly downloadable, the onSubmitComplete
handle is never called. This is a problem since this way one can't
clear 'Please wait' messages etc.

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