warning: already initialized constant VERIFY_PEER

Question

When I try to start the server I get the following warning:

/Users/sumitkalra1984/MVP/config/initializers/devise.rb:5: warning: already initialized constant VERIFY_PEER

My devise file:

OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE if Rails.env.development?

How do I find where the constant is already defined, and how do I overwrite that definition?

Post the entire content of your devise file, also check your environment and application files in config folder. — Matt, Sep 19 '13 at 09:28
nd @matt ok i m posting entire content of my device.rb file nd ofcourse environment and application files content. — Ishan Sharma, Sep 19 '13 at 11:01

score 10 · Answer 1 · answered Jan 23 '14 at 17:20

10

While I cannot find where else the constant is initialized, you can silence the warning by wrapping that line in a silence_warnings block.

silence_warnings do
  OpenSSL::SSL::VERIFY_PEER = OpenSSL::SSL::VERIFY_NONE unless Rails.env.production?
end

See: http://api.rubyonrails.org/classes/Kernel.html#method-i-silence_warnings

answered Jan 23 '14 at 17:20

ryanttb

1,278
13
20

Note: I also changed the end of the line to 'unless Rails.env.production?' because I was getting the warning while running tests as well. – ryanttb Jan 23 '14 at 17:22

score 2 · Answer 2 · answered Mar 30 '20 at 20:31

You can invoke OpenSSL::SSL.send(:remove_const, :VERIFY_PEER) before to unset the constant, set it as you need it, and restore it to its original value afterwards. Here is example code from a gist:

prev_setting = OpenSSL::SSL.send(:remove_const, :VERIFY_PEER)
OpenSSL::SSL.const_set(:VERIFY_PEER, OpenSSL::SSL::VERIFY_NONE)

# HTTP requests with DISABLED certificate verification go here.

OpenSSL::SSL.send(:remove_const, :VERIFY_PEER)
OpenSSL::SSL.const_set(:VERIFY_PEER, prev_setting)

Source and attribution: The solution comes from a comment by @sameers on Stack Overflow. Licenced under CC-BY-SA 4.0 as per the Stack Overflow user contribution licensing policy. The gist is assumed to be part of that as the author indicated their original intent of publishing it in a Stack Overflow comment.

warning: already initialized constant VERIFY_PEER

2 Answers2