Varnish 4.x vcl config for django

default.vcl

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 {
    # Happens before we check if we have this in cache already.
    #
    # Typically you clean up the request here, removing cookies you don't need,
    # rewriting the request, etc.
if (req.url ~ "^/static" || (req.http.cookie !~ "sessionid" && req.http.cookie !~ "csrftoken")) {
       unset req.http.Cookie;
    }

    if (req.http.upgrade ~ "(?i)websocket") {
        return (pipe);
    }

    if (req.http.Accept-Encoding) {
    if (req.http.Accept-Encoding ~ "gzip") {
      set req.http.Accept-Encoding = "gzip";
    } elsif (req.http.Accept-Encoding ~ "deflate") {
      set req.http.Accept-Encoding = "deflate";
    } else {
      # unkown algorithm
      unset req.http.Accept-Encoding;
    }
   }

   if (req.http.host ~ "^example.com") {
        return (synth (750, ""));
    }

}

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.url ~ "^/static" || (beresp.http.set-cookie !~ "sessionid" && beresp.http.set-cookie !~ "csrftoken")) {
       unset beresp.http.set-cookie;
       return (deliver);
  }

}

sub vcl_deliver {
    # Happens when we have all the pieces we need, and are about to send the
    # response to the client.
    #
    # You can do accounting or modifying the final object here.
}

sub vcl_synth {
    if (resp.status == 750) {
        set resp.status = 301;
        set resp.http.Location = "http://www.example.com" + req.url;
        return(deliver);
    }
}

sub vcl_pipe {
    if (req.http.upgrade) {
        set bereq.http.upgrade = req.http.upgrade;
    }
}