syntax: scgi_no_cache variable [...]
default: none
context: http, server, location
Specifies in what cases the responses will not be stored, e.g.
scgi_no_cache $cookie_nocache $arg_nocache$arg_comment; scgi_no_cache $http_pragma $http_authorization;
The expression is false if it is equal to the empty string or "0". For instance, in the above example, the response will not be stored if the cookie "nocache" is set in the request.