block.vcl

sub vcl_recv {
#FASTLY recv

  set req.http.ISO-3166-1 = client.geo.country_code;
  set req.http.Path = req.url.path;

  if (req.request != "HEAD" && req.request != "GET" && req.request != "FASTLYPURGE") {
    return(pass);
  }

  return(lookup);
}

sub vcl_fetch {
#FASTLY fetch

  if ((beresp.status == 500 || beresp.status == 503) && req.restarts < 1 && (req.request == "GET" || req.request == "HEAD")) {
    restart;
  }

  if (req.restarts > 0) {
    set beresp.http.Fastly-Restarts = req.restarts;
  }

  if (beresp.http.Set-Cookie) {
    set req.http.Fastly-Cachetype = "SETCOOKIE";
    return(pass);
  }

  if (beresp.http.Cache-Control ~ "private") {
    set req.http.Fastly-Cachetype = "PRIVATE";
    return(pass);
  }

  if (beresp.status == 500 || beresp.status == 503) {
    set req.http.Fastly-Cachetype = "ERROR";
    set beresp.ttl = 1s;
    set beresp.grace = 5s;
    return(deliver);
  }

  // Use HTTP Status 486 to "86" the client based on Vary conditions.
  if (beresp.http.Block) {
    set beresp.status = 403;
    set beresp.http.Vary = beresp.http.Block;
  } else {
    // Otherwise, vary on the Path.
    if (beresp.http.Vary) {
      set beresp.http.Vary = beresp.http.Vary ", Path";
    } else {
      set beresp.http.Vary = "Path";
    }
  }

  if (beresp.http.Expires || beresp.http.Surrogate-Control ~ "max-age" || beresp.http.Cache-Control ~ "(s-maxage|max-age)") {
    # keep the ttl here
  } else {
    # apply the default ttl
    set beresp.ttl = 0s;
  }

  return(deliver);
}

sub vcl_hash {
  set req.hash += req.http.host;
  // Do not assume variation based on URL, which will usually be added in vcl_fetch.
#FASTLY hash
  return(hash);
}

sub vcl_hit {
#FASTLY hit

  if (!obj.cacheable) {
    return(pass);
  }
  return(deliver);
}

sub vcl_miss {
#FASTLY miss
  return(fetch);
}

sub vcl_deliver {
#FASTLY deliver
  return(deliver);
}

sub vcl_error {
#FASTLY error
}

sub vcl_pass {
#FASTLY pass
}

sub vcl_log {
#FASTLY log
}