The last time I've done this I just have a link that sets the content type header to something like text/excel (that's not it exactly i don't think, google for it) and on Windows at least it always worked to open the page in Excel. And if you use an HTML table, excel will just open it as a spreadsheet, including any CSS text formatting you use.

Is that what you meant, or did I answer a different question?

Unfortunately, Excel can't cope with some of the more modern authentication systems being deployed on the web, so it's no longer as easy as providing a URL that spits out an HTML table, if you have to protect sensitive data behind a login (I think it can handle HTTP-Basic, but not anything requiring redirects; this may have changed in recent versions).

It's "application/vnd.ms-excel" for recent versions.

Yep. Believe you also need to set something like this: Content-Disposition: attachment; filename="foo.xls"

www.excelmashup.com

... Yeah, that's what I was thinking of. Thanks!

ps. you should make the generated script tag do src="//r.office.microsoft.com/r/rlidExcelButton?v=1&kip=1" so the http/https issue in your FAQ goes away

will pass along , thanks!

Woah. That's cool.