[PATCH] fix: UnicodeDecodeError: can't decode byte 0xad

[Valentin Kleibel]

Hi,

> I propose handling it like 
> https://kallithea-scm.org/repos/kallithea-incoming/changeset/8b7c72355750fcf791cd4abfc332e26e556aee90 .
> 
> We don't really *know* if the error came from the URL encoding, so I 
> prefer to just catch the error we actually saw, and state the fact that 
> we got a decode exception while processing request parameters.
> 
> Do you agree patch that would be fine - and that the attribution is fine?

Thanks for your work, that patch looks/works good and the attribution is 
fine with me.

> I'm not positively sure webob can't choke on decoding anything else. 
> That could perhaps be nice to test/review too. But that is apparently 
> not a real problem (yet).

I'm pretty sure it can, but one might need to send a wrong encoding in 
the Content-type header.
For the URL-parameters, in contrast, every byte sequence encoded will 
always be interpreted as UTF-8, even before csrf or auth checks.

Valentin