I just wanted to reply that I found an easy solution that works well, and the
customer is happy with it. Instead of opening the PDF report inline in a
new browser window, I am now setting the response header disposition type to
be "attachment" instead of "inline". So when the report is streamed back,
the user gets a standard Windows prompt to Open, Save, or Cancel the PDF
file. If there are validation errors, the backing bean simply posts a
FacesMessage with the error, and returns null to redisplay the parameter
page.
The code change was like this:
FacesContext context = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context
.getExternalContext().getResponse();
response.setHeader("Content-Type", "application/pdf");
response.setHeader("Content-Disposition", "attachment; filename=" +
fileName);
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