Ruby(HardWay_Zed_Shaw(ex12)) << RUNTIME ERROR open(ruby-lang.org) - ruby-on-rails

Question

I'm working through the Hard Way exercises and have encountered a runtime error when attempting to run the lesson code for ex12.
Any suggestions? Thanks in advance!
INSTRUCTIONS
http://ruby.learncodethehardway.org/book/ex12.html
MY INPUT
require 'open-uri'
open("http://www.ruby-lang.org/en") do |f|
f.each_line {|line| p line}
puts f.base_uri # <URI::HTTP:0x40e6ef2 URL:http://www.ruby-lang.org/en/>
puts f.content_type # "text/html"
puts f.charset # "iso-8859-1"
puts f.content_encoding # []
puts f.last_modified # Thu Dec 05 02:45:02 UTC 2002
end
OUTPUT =>
$ ruby ex12.rb
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:174:in `open_loop': redirection forbidden: http://www.ruby-lang.org/en -> https://www.ruby-lang.org/en (RuntimeError)
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:132:in `open_uri'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:518:in `open'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/open-uri.rb:30:in `open'
from ex12.rb:3

Answer 1

It's an SSL-Related Redirection Issue
The stack trace gives this error:
`open_loop': redirection forbidden: http://www.ruby-lang.org/en -> https://www.ruby-lang.org/en (RuntimeError)
For whatever reason, open-uri is detecting a loop when redirecting from an http scheme to https. All you need to do to fix it is use the correct scheme in your URI when calling the Kernel#open method. For example:
open('https://www.ruby-lang.org/en')
Once that change is made, the script works fine.

Answer 2

On the same exercice, after correcting http to https, i got this :
/Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/net/http.rb:918:in `connect': SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/net/http.rb:918:in `block in connect'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/timeout.rb:52:in `timeout'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/net/http.rb:918:in `connect'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/net/http.rb:862:in `do_start'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/net/http.rb:851:in `start'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:313:in `open_http'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:708:in `buffer_open'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:210:in `block in open_loop'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:208:in `catch'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:208:in `open_loop'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:149:in `open_uri'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:688:in `open'
from /Users/FDS/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/open-uri.rb:34:in `open'
from openuri.rb:2:in `<main>'