Override session lookup for ActiveRecord::SessionStore::Session to find by session id in request header X_Session_ID, and fallback to default lookup.

rails_session_from_request_header.rb

module ActionDispatch
  module Session
    class AbstractStore
      # Override the default way to extract the session id
      # First check for a X_Session_ID request header, otherwise fallback to cookies/params
      def extract_session_id(env)
        request = Rack::Request.new(env)
        sid = request.env['HTTP_X_SESSION_ID']
        sid ||= request.cookies[@key]
        sid ||= request.params[@key] unless @cookie_only
        sid
      end
    end
  end
end