How can I get information about the user who clicked on the link from the VK site?

Question

JavaScript

I need that when people go to my VK page and click on the link in my profile, they get to my site, where without api, or without other user actions on the site, some information about the user who went to the site, or his id is any name, or at least something that will help to understand who moved, perhaps something to find in the http headers? What are the possible ways to solve this problem? In addition, I also need a host that VK will not perceive as dangerous, I tested it, and my host did not pass this test app-vk.herokuapp.com, I need any host, but preferably with ruby ​​support.

Answer 1

https://habrahabr.ru/post/228617/

Answer 2

No way.

Answer 3

Damn, there are all sorts of "VK Traps" in applications, try it, it seems to me that this is exactly what you need