Description of problem:
There is a bug in ruby stdlib Net::HTTP class which prevents connecting to hosts using IPv6.


Version-Release number of selected component (if applicable):
[root@rh72-node1:~]# ruby -v
ruby 2.0.0p598 (2014-11-13) [x86_64-linux]
[root@rh72-node1:~]# rpm -q ruby
ruby-2.0.0.598-25.el7_1.x86_64


How reproducible:
easily, always


Steps to Reproduce:
[root@rh72-node1:~]# irb
irb(main):001:0> require 'net/http'
=> true
irb(main):002:0> myhttp = Net::HTTP.new("::1")
=> #<Net::HTTP ::1:80 open=false>
irb(main):003:0> myhttp.start
URI::InvalidURIError: the scheme http does not accept registry part: ::1:80 (or bad hostname?)
        from /usr/share/ruby/uri/generic.rb:214:in `initialize'
        from /usr/share/ruby/uri/http.rb:84:in `initialize'
        from /usr/share/ruby/uri/common.rb:214:in `new'
        from /usr/share/ruby/uri/common.rb:214:in `parse'
        from /usr/share/ruby/uri/common.rb:747:in `parse'
        from /usr/share/ruby/uri/common.rb:996:in `URI'
        from /usr/share/ruby/net/http.rb:1027:in `proxy_uri'
        from /usr/share/ruby/net/http.rb:1014:in `proxy?'
        from /usr/share/ruby/net/http.rb:868:in `connect'
        from /usr/share/ruby/net/http.rb:862:in `do_start'
        from /usr/share/ruby/net/http.rb:857:in `start'
        from (irb):3
        from /usr/bin/irb:12:in `<main>'
irb(main):004:0> myhttp = Net::HTTP.new("[::1]")
=> #<Net::HTTP [::1]:80 open=false>
irb(main):005:0> myhttp.start
SocketError: getaddrinfo: Name or service not known
        from /usr/share/ruby/net/http.rb:878:in `initialize'
        from /usr/share/ruby/net/http.rb:878:in `open'
        from /usr/share/ruby/net/http.rb:878:in `block in connect'
        from /usr/share/ruby/timeout.rb:52:in `timeout'
        from /usr/share/ruby/net/http.rb:877:in `connect'
        from /usr/share/ruby/net/http.rb:862:in `do_start'
        from /usr/share/ruby/net/http.rb:857:in `start'
        from (irb):5
        from /usr/bin/irb:12:in `<main>'
irb(main):006:0>


Actual results:
Ruby does not even try to connect to localhost no matter if the address is enclosed in [] (which is wrong anyways) or not.


Expected results:
irb(main):001:0> require 'net/http'
=> true
irb(main):002:0> myhttp = Net::HTTP.new("::1")
=> #<Net::HTTP ::1:80 open=false>
irb(main):003:0> myhttp.start
Errno::ECONNREFUSED: Connection refused - connect(2) for "::1" port 80
        from /usr/share/ruby/net/http.rb:879:in `initialize'
        from /usr/share/ruby/net/http.rb:879:in `open'
        from /usr/share/ruby/net/http.rb:879:in `block in connect'
        from /usr/share/ruby/timeout.rb:73:in `timeout'
        from /usr/share/ruby/net/http.rb:878:in `connect'
        from /usr/share/ruby/net/http.rb:863:in `do_start'
        from /usr/share/ruby/net/http.rb:858:in `start'
        from (irb):3
        from /usr/bin/irb:11:in `<main>'
irb(main):004:0>

Ruby tries to connect to localhost. Since there is no HTTP server running, it gets Errno::ECONNREFUSED, that is not an issue.


Additional info:
This has been reported in upstream https://bugs.ruby-lang.org/issues/9129
and fixed as well https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=47079