Issue #19153 has been updated by mame (Yusuke Endoh).
mame (Yusuke Endoh) wrote in #note-1:
As I wrote in
https://github.com/ruby/cgi/pull/29#issuecomment-1325852303, RFC 6265 prohibits leading
dot for Cookie domain. However, the old spec of Cookie (RFC 2109) required the leading
dot. I think it is reasonable to allow leading dots.
Just for the record: it looks like RFC 6265 allows a leading dot. See
https://github.com/ruby/cgi/pull/29#issuecomment-1328487556
----------------------------------------
Bug #19153: Since 2.7.7 CGI::Cookie raises ArgumentError when cookie domains is prefixed
with a dot
https://bugs.ruby-lang.org/issues/19153#change-100287
* Author: cpinto (Celso Pinto)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.7.7p221 (2022-11-24 revision 168ec2b1e5) [arm64-darwin22]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
The rspec tests of our Rails app started failing with an ArgumentError after upgrading to
2.7.7. On inspection, the issue seems to be caused by CGI::Cookie.domain=:
```
def domain=(str)
if str and ((str = str.b).bytesize > 255 or !DOMAIN_VALUE_RE.match?(str))
raise ArgumentError, "invalid domain: #{str.dump}"
end
@domain = str
end
```
Setting a breakpoint:
0> str
=> ".example.com"
0> DOMAIN_VALUE_RE
=> /\A(?<label>(?!-)[-A-Za-z0-9]+(?<!-))(?:\.\g<label>)*\z/
0> DOMAIN_VALUE_RE.match?(str)
=> false
0> DOMAIN_VALUE_RE.match?('example.com')
=> true
--
https://bugs.ruby-lang.org/