irb(main):001:0> require 'open-uri'
=> true
irb(main):002:0> open('https://repo1.maven.org/maven2/com/facebook/presto/presto-server/0.117/presto-server-0.117.tar.gz.sha1') do |f|
irb(main):003:1*   sha1_string = f.read
irb(main):004:1> end
RuntimeError: Non-HTTP proxy URI: https://10.159.32.155:8080/
        from /usr/lib64/ruby/2.2.0/open-uri.rb:257:in `open_http'
        from /usr/lib64/ruby/2.2.0/open-uri.rb:736:in `buffer_open'                                                                                                                                                                          
        from /usr/lib64/ruby/2.2.0/open-uri.rb:211:in `block in open_loop'                                                                                                                                                                   
        from /usr/lib64/ruby/2.2.0/open-uri.rb:209:in `catch'                                                                                                                                                                                
        from /usr/lib64/ruby/2.2.0/open-uri.rb:209:in `open_loop'                                                                                                                                                                            
        from /usr/lib64/ruby/2.2.0/open-uri.rb:150:in `open_uri'                                                                                                                                                                             
        from /usr/lib64/ruby/2.2.0/open-uri.rb:716:in `open'                                                                                                                                                                                 
        from /usr/lib64/ruby/2.2.0/open-uri.rb:34:in `open'                                                                                                                                                                                  
        from (irb):2                                                                                                                                                                                                                         
        from /usr/bin/irb:11:in `<main>'                                                                                                                                                                                                     
irb(main):005:0> open('http://repo1.maven.org/maven2/com/facebook/presto/presto-server/0.117/presto-server-0.117.tar.gz.sha1') do |f|                                                                                                       
irb(main):006:1*   sha1_string = f.read
irb(main):007:1> end
=> "dcadf9c04e2fd83e64a9801d48c84694a0f6d189"