问题
I have a Ruby-on-Rails web application with implemented google tag manager (GTM). Assume, that some user comes to my site, surfs several pages and then sends me a feedback through feedback form. Is there any way to gather as much data as possible which is collected by GTM for current user session in order to send it together with this feedback?
来源：https://stackoverflow.com/questions/37572960/get-user-data-collected-by-google-tag-manager