CSRF token and caching

[Pinakee BIswas]

Hi,

Our backend uses CSRF tokens for form posts. For pages with forms, if 
Varnish caching is enabled for such pages, form post is failing due to 
CSRF error. Is there a way to handle this? I have been reading that 
using ESI is a solution.

Would really appreciate if someone could help with the above.

Thanks,

Pinakee

PS: Currently, we are using template caching by Nginx. The pages with 
form posts surprisingly works fine with Nginx template caching (but 
isn't working with Varnish). Trying to investigate why.