openid-ssl-error-fix.rb

# This is an attempt to the following errors:
#
#     PG::UnableToSend: SSL error: cert already in hash table=0A
#
# This wraps the OpenID::SimpleSign.store method, from the
# ruby-openid-apps-discovery gem, in a thread. I believe the root cause of this
# error is that in some environment the store gets duplicate certificates added
# to it. This causes OpenSSL errors, which then are raised in the pg gem,
# because it believes something serious has gone wrong.
#
# Wrapping the implementation in a thread, should cause the errors to be scoped
# to only that thread. See: https://gist.github.com/olly/9890199
#
# We don't care about thread safety here, because we don't actually care which
# store _wins_, we just want to suppress the OpenSSL errors.
module OpenID::StoreWithThread
  def store
    @store ||= begin
      store = nil
      Thread.new { store = super }.join
      store
    end
  end
end

class OpenID::SimpleSign
  class << self
    prepend OpenID::StoreWithThread
  end
end