cache-GET-only

proxy_cache_path /tmp/cache keys_zone=cookbooks:10m;
##
server {
    listen 8001;
    allow 127.0.0.1;
    deny all;

    location / {
        echo "hello there young padawan! Welcome to $uri. " ;
        echo "This request would $http_x_cache_status been cached. " ;
        echo "Verify request params preserved: $args ";
    }
}

upstream bookshelf {
    server localhost:8001 ;
}

server {
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        # Make site accessible from http://localhost/
        server_name localhost;

        location ~ ^/bookshelf/?(.*)$ {
            set $destination "uncached";
            if ($request_method = "GET") {
                set $destination "cached" ;
            }
            rewrite ^(.*)$ /$destination-bookshelf/$1 last;


        }
        location ~ ^/cached-bookshelf/?(.*)$ {
            internal;
            proxy_cache cookbooks;

            more_clear_headers 'Cache-Control';
            proxy_set_header X-Proxy-Cache $upstream_cache_status;
            proxy_set_header X-Cache-Status "have";
            proxy_pass http://bookshelf/$1?$args;
        }
        location ~ ^/uncached-bookshelf/?(.*)$ {
            internal;
            proxy_set_header X-Cache-Status "have not";
            proxy_pass http://bookshelf/$1?$args;
        }
}