Re: Bug in url-retrieve-synchronously from url.el on redirect

[Daniele Nicolodi]

On 10/07/2020 14:25, Yuri Khan wrote:
> On Sat, 11 Jul 2020 at 02:43, Daniele Nicolodi <daniele@grinta.net> wrote:
> 
>> As far as I understand the RFCs (and being wrong before, I may be wrong
>> again) do not allow for < > quoting either. Why does url-http.el strip
>> them? Why does it break the URI at the first space if spaces are not
>> allowed?
> 
> I cannot answer that, maybe someone who is knowledgeable about
> uri-http.el chimes in.
> 
> RFC 7231 allows clients to attempt to DTRT with invalid Location URIs
> in any way they deem appropriate; you could argue for a different
> recovery heuristic. Me, I’d rather have things break loudly on each
> violation, so that it does not go unnoticed for too long. Postel’s
> Razor is how we got HTML in its current shape.

I tend to agree with you, but, in this specific case, being compatible
with other HTTP implementations is a worthwhile goal.

Unfortunately, re-defining url-http-parse-headers is the only
work-around I found to make Emacs do the less bad thing when dealing
with this malformed URIs.

Cheers,
Dan