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require 'open-uri'
module OpenURI
def self.redirectable?(uri1, uri2) # :nodoc:
uri1.scheme.casecmp(uri2.scheme).zero? ||
(/\A(?:http|https|ftp)\z/i =~ uri1.scheme && /\A(?:http|https|ftp)\z/i =~ uri2.scheme)
end
end
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