At the moment we have a blanket rule that users can’t archive their own
services, to prevent someone accidentally deleting a real live service,
because that would be Very Bad.
But the tickets we get from users asking us to delete services are for
services they set up when they were just trying out Notify. There’s not
much harm in letting users delete these services, the consequences of
doing so are much lower than those of deleting a live service. And it
should mean fewer support tickets for us to deal with.
We should standardise on <a download> rather than
<a download="download"> everywhere. The value of the download attribute
tells the browser what filename to use, but is overridden by the
Content-Disposition HTTP header. Since it’s not being used, we should
remove it for the sake of disambiguation.
In user research, we’ve seen users copy/pasting the contents of the
inbound SMS page into a spreadsheet, in order to keep a record of the
messages they receive. They even went as far as to write a macro which
fixed the errors caused by copying and pasting.
It would be much easier if we just gave them the data already in a
spreadsheet format. Which is what this commit does.
One caveat is that, because spreadsheets can contain executable code (ie
formulas), and because we’re populating the spreadsheet with
user-submitted data (albeit via SMS) we need to be careful about
injection attacks.
The details of how these attacks work are detailed here (interesting
reading): http://georgemauer.net/2017/10/07/csv-injection.html
The mitigation is to not allow characters which initialise a formula
at the start of the cell.
