Re: [RFC 0/1] mailinfo: de-quote quoted-pair in header fields

[Jeff King <peff@peff.net>]

On Tue, Sep 13, 2016 at 05:04:45PM -0700, Junio C Hamano wrote:

> > @@ -461,6 +506,7 @@ static int check_header(struct mailinfo *mi,
> >  			 */
> >  			strbuf_add(&sb, line->buf + len + 2, line->len - len - 2);
> >  			decode_header(mi, &sb);
> > +			unescape_quoted_pair(mi, &sb);
> >  			handle_header(&hdr_data[i], &sb);
> >  			ret = 1;
> >  			goto check_header_out;
> 
> I wonder why this call is only in here, not on other headers that
> all call decode_header().  For that matter, I wonder if the call (or
> the logic of the helper function itself) should go at the end of
> decode_header().  After all, this is different kind of decoding; the
> current one knows how to do b/q encoding but forgot about the more
> traditional quoting done with backslash, and you are teaching the
> code that the current decoding it does is insufficient and how to
> handle the one that the original implementors forgot about.

It has been a while since I looked at rfc2822, but aren't the quoting
and syntax rules different for addresses versus other headers? We would
not want to dequote a Subject header, I think.

-Peff