# File lib/omniauth/strategy.rb, line 495
    def ssl?
      request.env['HTTPS'] == 'on' ||
        request.env['HTTP_X_FORWARDED_SSL'] == 'on' ||
        request.env['HTTP_X_FORWARDED_SCHEME'] == 'https' ||
        (request.env['HTTP_X_FORWARDED_PROTO'] && request.env['HTTP_X_FORWARDED_PROTO'].split(',')[0] == 'https') ||
        request.env['rack.url_scheme'] == 'https'
    end