Re: bin/57003 (ftp can't handle HTTP redirections?)

[Kimmo Suominen <kim%netbsd.org@localhost>]

Hi all,

The redirect is valid. A relative URI has been allowed in the
Location: header since at least June 2014 in RFC-7231. It obsoleted
RFC-2616 from June 1999, which did require an absolute URI.

RFC-7231 has been obsoleted by RFC-9110 in June 2022, but the
specification for the Location header did not change.

So ftp(1) appears to have a bug where it is not resolving the relative
URI into an absolute one.

On Debian 11.4:

: beowulf:/tmp/kim; ftp about:version
Version: tnftp 20200705

: beowulf:/tmp/kim; ftp
https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/i386/binary/sets/base.tgz
Trying [2a04:4e42:3a::262]:443 ...
Requesting https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/i386/binary/sets/base.tgz
Redirected to /pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz
ftp: Can't lookup
`/pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz:ftp':
Name or service not known
ftp: Can't connect or login to host
`/pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz:?'
Exit 1

On NetBSD 9.99.99 (202208051900Z):

: revolutions:/tmp/kim; ftp about:version
Version: NetBSD-ftp 20210826

: revolutions:/tmp/kim; ftp
https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/i386/binary/sets/base.tgz
Trying [2a04:4e42:3a::262]:443 ...
Requesting https://nycdn.netbsd.org/pub/NetBSD-daily/HEAD/latest/i386/binary/sets/base.tgz
Redirected to /pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz
ftp: Can't lookup
`/pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz:ftp':
No address associated with hostname
ftp: Can't connect or login to host
`/pub/NetBSD-daily/HEAD/202209101100Z/i386/binary/sets/base.tgz:?'
Exit 1

Kind regards,
+ Kimmo