Detect non-curl user agents

1 files changed, 13 insertions, 0 deletions

diff --git a/curling.rb b/curling.rb
index 59c67db..4b03e8d 100644
--- a/curling.rb
+++ b/curling.rb
@@ -9,6 +9,19 @@ end
 
 before do
   headers 'Content-Type' => 'text/plain'
+  if request.user_agent !~ /^curl/
+    halt <<~MSG
+Welcome to Hex Curler!
+======================
+This game is based on Jeff Moore's Hex (www.1km1kt.net/rpg/hex).
+Source code: gitlab.com/m-chrzan/hex-curler
+
+This game is meant to be experienced in the command line. Run the following line
+of bash to get started:
+
+c=; while clear; curl -c k -b k hex.m-chrzan.xyz/$c; read c; [ $c ]; do :; done
+    MSG
+  end
 end
 
 get '/' do