1) What sort of electronic payment solutions are people using with
JSP/Servlets?  In ASP we've always used CyberCash, but I'm not so keen on
using their perl library on the Unix server, or ASP framework on an NT
box... does any service offer a payment bean?  Credit card submission
systems should not take over my presentation layer!

Now, some questions that aren't Java-specific:

2) Does anyone know how to initiate a multipart download, or if it can be
done at all?  e.g. select three files and have them all saved to a directory
(or prompt for each one... that is probably browser's choice).  Target
browser is IE4/Win.

3) This time, somewhat IE4/Win specific.  How can we stream a file to the
browser (using out.write() or similar) and have it saved to disk, even if it
is a "known" filetype to IE?  Using application/x-msdownload as the mime
type did not work for us.  In fact, when we ran into this issue on an ASP
project, we came to the conclusion, based on Usenet discussions, that there
was no workaround to prevent IE from looking at the file contents and
figuring out how to display them rather than save to disk.  Then someone
noticed that Yahoo! VISA allows the download of Excel CSV files through a
mysterious CGI (that we can't reverse-engineer because it is only available
through SSL).

Thanks in advance to all who can provide any insight to any of the above.
--
hans @ gerwitz .com

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