default.vcl

# Default backend
backend apache {
        .host ="127.0.0.1";
        .port = "8081";
	.max_connections = 100;
}

backend unicorn {
	.host = "127.0.0.1";
        .port = "8082";
	.max_connections = 250;
}

acl purge {
        "localhost";
	"68.144.18.239";
}

sub vcl_recv {
    if (req.url ~ "^/2.0") {
        set req.backend = apache;
    }

    if (req.url ~ "^/2.1") {
    	set req.backend = unicorn;
    }

    # Handle special requests
    if (req.request != "GET" && req.request != "HEAD") {
        # POST - Logins and edits
        if (req.request == "POST") {
           return(pass);
        }

        # PURGE - The CacheFu product can invalidate updated URLs
        if (req.request == "PURGE") {
           if (!client.ip ~ purge) {
              error 405 "Not allowed.";
           }
           return(lookup);
        }
    }

     # Do a "lookup" in the cache.  This goes to "vcl_hit", or to
     # "vcl_miss" and then "vcl_fetch"
     return(lookup);

     # The default vcl_recv is used from here.
 }

# Do the PURGE thing
sub vcl_hit {
        if (req.request == "PURGE") {
                set obj.ttl = 0s;
                error 200 "Purged";
        }
}
sub vcl_miss {
        if (req.request == "PURGE") {
                error 404 "Not in cache";
        }
}

# Enforce a minimum TTL, since we can PURGE changed objects actively

sub vcl_fetch {

     if (req.url ~ "^/2.1/Movie.search|^/2.1/Movie.getInfo") {
        esi;  /* Do ESI processing */
     }

     if (req.url ~ "^/2.0/Movie.imdbLookup|^/2.0/Movie.getInfo") {
        esi;  /* Do ESI processing */
     }

}

sub vcl_deliver {
        if (obj.hits > 0) {
                set resp.http.X-Cache = "HIT";
        } else {
                set resp.http.X-Cache = "MISS";
        }
}