+
+ def redirect_to_login
+ respond_to do |f|
+ f.html {
+ if request.method == 'GET'
+ redirect_to $arvados_api_client.arvados_login_url(return_to: request.url)
+ else
+ flash[:error] = "Either you are not logged in, or your session has timed out. I can't automatically log you in and re-attempt this request."
+ redirect_to :back
+ end
+ }
+ f.json {
+ @errors = ['You do not seem to be logged in. You did not supply an API token with this request, and your session (if any) has timed out.']
+ self.render_error status: 422
+ }
+ end
+ false # For convenience to return from callbacks
+ end
+
+ def using_reader_tokens(login_optional=false)
+ if params[:reader_tokens].is_a?(Array) and params[:reader_tokens].any?
+ Thread.current[:reader_tokens] = params[:reader_tokens]
+ end
+ begin
+ yield
+ rescue ArvadosApiClient::NotLoggedInException
+ if login_optional
+ raise
+ else
+ return redirect_to_login
+ end
+ ensure
+ Thread.current[:reader_tokens] = nil
+ end
+ end
+
+ def using_specific_api_token(api_token)
+ start_values = {}
+ [:arvados_api_token, :user].each do |key|
+ start_values[key] = Thread.current[key]
+ end
+ Thread.current[:arvados_api_token] = api_token
+ Thread.current[:user] = nil
+ begin
+ yield
+ ensure
+ start_values.each_key { |key| Thread.current[key] = start_values[key] }
+ end
+ end
+