syncId, clientId - Explanation

Hello,

can someone explain me what is the role of syncId aswell as the clientId?
There are placed in the csrf-token which is in turn placed in the http request.
I know that the csrf token is a protection against csrf-attacks, but it contains more value than other csrf-token I have seen.

Best regards,
Nazar Medeiros
 

is the usage of the clientId something new? Because I look a page which is built with vaadin and using the network inspector showed me, that no clientId was visible..only the syncId.

For example this page:
https://demo.vaadin.com/dashboard/#!schedule

To be honest the diffrence is not clear to me. In the video it says that the syncId takes care that no requests are dropped between other requests. A typical identifier for each request, but the clientId is the same too wright? The only difference I can see is that clientId increases from some client-side interactions only.

Thanks in advance!
Best regards,
Nazar

Tatu Lund: If you watch this webinar where we are configure performance testing with Jmeter, this question of yours gets covered pretty well too. https://www.youtube.com/watch?v=XQ1ws12W6gk

Mr. Lund I was wondering if you could give more explanation about the both ids.
I really really have to understand what they are used for =)

Best regards,
Nazar