#
# This is an example VCL file for Varnish.
#
# It does not do anything by default, delegating control to the
# builtin VCL. The builtin VCL is called when there is no explicit
# return statement.
#
# See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/
# and http://varnish-cache.org/trac/wiki/VCLExamples for more examples.

# Marker to tell the VCL compiler that this VCL has been adapted to the
# new 4.0 format.
vcl 4.0;

# Default backend definition. Set this to point to your content server.
backend default {
    .host = "127.0.0.1";
    .port = "8080";
}

sub vcl_recv {

     if (req.method != "GET" &&
       req.method != "HEAD" &&
       req.method != "PUT" &&
       req.method != "POST" &&
       req.method != "TRACE" &&
       req.method != "OPTIONS" &&
       req.method != "DELETE") {
         /* Non-RFC2616 or CONNECT which is weird. */
         return (pipe);
     }

     # Hardcoded for testing
     set req.http.host = "nms.tg16.gathering.org"; 

     if (req.method != "GET" && req.method != "HEAD") {
         /* We only deal with GET and HEAD by default */
         return (pass);
     }
    
     unset req.http.Cookie;

     return (hash);
 }

sub vcl_hash {
    hash_data(req.http.authorization);
}

sub vcl_backend_response {
    # Happens after we have read the response headers from the backend.
    # 
    # Here you clean the response headers, removing silly Set-Cookie headers
    # and other mistakes your backend does.
    if (!(bereq.http.host ~ "stream")) {
	    if (beresp.status == 200) {
		    set beresp.ttl = 2s;
	    } else {
		    set beresp.ttl = 0s;
	    }
	    if(bereq.url ~ "port-state.pl" && beresp.status == 200) {
		    set beresp.ttl = 1s;
	    }
	    if (beresp.status == 200 && bereq.url ~ "now=") {
		    set beresp.ttl = 60m;
	    }
	    if (beresp.status == 500) {
		    return (retry);
	    }
    }

}