Force download of JPEG

Question

Hi,
My servlet creates a JFreeChart with the writeChartAsJPEG function. The chart itself is created properly.
I would like to allow the user to open or save the file via a dialog box, but IE recognises the file type and displays the chart in the browser.
I have been searching the Internet for ages now and haven't found a solution to my problem.
Do you have a solution to open the dialog box instead of displaying the chart in the browser?
My code is the following:
public void doPost(HttpServletRequest request, HttpServletResponse response) {
try {
response.reset();
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), getChart(request), 500, 300);
response.setContentType("application/force-download");
response.setHeader("content-disposition","inline; filename=Injury_Data.jpg");
} catch (Exception e) {e.printStackTrace();}
I have tried, without any success, the following actions:
- Replace "inline" per "attachment"
- Replace ".jpg" per ".zzz" or deleting extension
- Add response.setHeader("pragma","public")
- All sorts of MIME type: "image/jpeg", "application/unknown", "application/stream", "application/octet-stream", etc...
The problem is urgent now and i don't have any more leads to try and find a solution. Do you have any idea?
Thanks,
Christelle

Answer 1

I am doing something similar and mine works... Try setting the response headers before outputting the image. The only other differences I see are capitilization (Content-Disposition), and using quotes (") around the filename.