lib/gitlab/utils/mime_type.rb


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# frozen_string_literal: true
require 'magic'

# This wraps calls to a gem which support mime type detection.
# We use the `ruby-magic` gem instead of `mimemagic` due to licensing issues
module Gitlab
  module Utils
    class MimeType
      class << self
        def from_io(io)
          return unless io.is_a?(IO) || io.is_a?(StringIO)

          mime_type = File.magic(io, Magic::MIME_TYPE)
          mime_type == 'inode/x-empty' ? nil : mime_type
        end

        def from_string(string)
          return unless string.is_a?(String)

          string.type
        end
      end
    end
  end
end