Plack::Middleware::ConditionalGET - Middleware to enable conditional GET

       This middleware enables conditional GET and HEAD using "If-None-Match" and "If-Modified-Since" header.
       The application should set either or both of "Last-Modified" or "ETag" response headers per RFC 2616.
       When either of the conditions is met, the response body is set to be zero length and the status is set to
       304 Not Modified.

       Plack::Middleware::ConditionalGET - Middleware to enable conditional GET

       Rack::ConditionalGet

perl v5.38.2                                       2024-01-20             Plack::Middleware::ConditionalGET(3pm)

         builder {
             enable "ConditionalGET";
             ....
         };