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Mike Scott wrote:
On 30/01/15 19:41, wrote:
It looks like I was a bit quick to blame IE. It turns out it's 1 of the
3 mirrors in the UK which is misbehaving. Doesn't affect other browsers,
as they seem to just use the .msi extension from the download URI,
whereas IE uses the Content-Type header returned by the server and
changes the extension to match.

Nevertheless, arguably incorrect browser behaviour. From the user's
perspective, he's offered a file with a specific name and type on the
server, and would expect it to appear with that name, especially as the
application type is invisible to the user.

To be fair, the URI doesn't necessarily reflect the true type. e.g. a PHP script can generate a PDF based on database content, but it's not very helpful if downloading that leads to a file with PDF content but a .php extension. I guess that's the kind of problem IE is trying to solve by using the Content-Type to determine the file name. One of those cases where it can't be right all the time either way.

There is a separate header (Content-Disposition I think, off the top of my head) where a filename can be specified, but the mirror in question doesn't send that header at all. I think I've found before that IE does honour that header if it's set.

If there's an
extension/app-type mismatch, I for one would expect a warning at least
before changing the extension. To be fair, the download dialogue already
shows the incorrect extension, and it can be changed in the 'file open'
dialogue if the user knows to do so. But IMO it shouldn't be so :-{

You only see that dialog if you choose Save > Save As when IE prompts for what to do with the download. If you just click "Save", it saves to a default folder with the default filename (.man in this case).

I notice the failing server also helpfully truncates all the file names
to the same short string on the download web page, so the user cannot
see what the name should be. (At least, that's how it looks in front of
me now).

That's not so helpful, although you wouldn't usually see that list at all when downloading via

Perhaps they would best be removed from the list of mirrors
until they sort out their act.

Having identified the problematic mirror, hopefully something will be done - either getting them to fix their configuration or, as you suggest, removing them from the list.


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