I found a dirty solution to solve the problem:
List<String> control = new ArrayList<String>();
reportService.generateReport(<...lots of params...>, new
AsyncCallback
() {
public void onFailure(final Throwable throwable) {
control.add(false);
}
public void onSuccess(final Object o) {
control.add(true);
}
});
while(control.size() == 0){
//do nothing.
}
if(control.get(0)){
Frame downloadFrame = new Frame();
downloadFrame .setSize("0px", "0px");
downloadFrame .setVisible(false);
RootPanel.get().add(downloadFrame );
downloadFrame .setUrl(GWT.getModuleBaseURL()
+"DownloadReportService");
}
This dirty solution of trying to sync a async call works, and avoids
the download warning in IE7!
But now, due to the while cycle, IE 7 shows a error stating that a
script is doing the page to run slowly, and asks if i want to stop
it.
I really appreciate your help on this...
Cheers,
On 6 Maio, 18:54, Sergio Silva <[email protected]> wrote:
> I have a problem downloading a file using Internet Explorer 7:
>
> I Have a GWT "almost offline" application that works and generates
> lots of data that will be written into a PDF report.
>
> The only call that the application do to a servlet is when he needs to
> generate the PDF report.
>
> I'm using birt engine to generate the PDF report, and i'm doing a RPC
> call to generate the pdf:
>
> On GWT file:
>
> reportService.generateReport(<...lots of params...>, new AsyncCallback
> () {
>
> public void onFailure(final Throwable throwable) {
>
> }
>
> public void onSuccess(final Object o) {
> Frame downloadFrame = new Frame();
> downloadFrame .setSize("0px", "0px");
> downloadFrame .setVisible(false);
> RootPanel.get().add(downloadFrame );
> downloadFrame .setUrl(GWT.getModuleBaseURL() +
> "DownloadReportService");
> }
> });
>
> The report PDF is sucessfully generated and placed on a temporary dir,
> where it will be loaded by the DownloadReportService.
>
> This works fine withall firefox versions but in IE7 it doesn't let me
> download the file until I accept a raised warning of download blocked
> (appears when the address it's not localhost address and with default
> ie7 settings).
>
> When i accept the download warning all the information in my
> application is clean because IE refreshes the page.
>
> I saw this problem solved on another threads on this list, and i tried
> to do it that way, but it didn't work.
> (Using Window.open or Window.Location.assign Window.Location.assign).
>
> I want to get rid of the download warning, or if not possible, make
> sure the page is not refreshed and the content cleaned! Can anyone
> help me?
>
> The DownloadReportService (extends HttpServlet) code:
>
> protected void doGet(HttpServletRequest request, HttpServletResponse
> response) throws ServletException, IOException {
> String dir = "C:\\tmp";
> String fileName = "test.pdf";
>
> // Open file
> File f = new File(dir + "\\" + fileName);
> ServletOutputStream op = response.getOutputStream();
> ServletContext context = getServletConfig().getServletContext
> ();
> String mimetype = context.getMimeType(fileName);
>
> // Set the servlet response
> response.setContentType((mimetype != null) ? mimetype :
> "application/octet-stream");
> response.setContentLength((int) f.length());
> response.setHeader("Content-Disposition", "attachment;
> filename=\"" + fileName + "\"");
>
> // Stream to the requester.
> byte[] bbuf = new byte[BUFSIZE];
> DataInputStream in = new DataInputStream(new FileInputStream
> (f));
>
> int length;
> while ((length = in.read(bbuf)) != -1) {
> op.write(bbuf, 0, length);
> }
>
> in.close();
> op.flush();
> op.close();
>
> }
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