Start the server: node test_server.js
Do a request where an aswer is expected:
curl -i -d "hi there" -H "If-None-Match:fd33e2e8ad3cb1bdd3ea8f5633fcf5c77" http://localhost:3000/hi
Do a request where a 304 (Not modified) is expected:
curl -i -d "hi there" -H "If-None-Match:fd33e2e8ad3cb1bdd3ea8f5633fcf5c7" http://localhost:3000/hi