Glossary: Real-Time Apps with WebSockets

HTTP status codes

Also written: 101 Switching Protocols, 101, 201 Created, 400, 401 Unauthorized, status code

Numbers that say how an HTTP request went: 101 Switching Protocols (server accepts a WebSocket upgrade, after which the connection carries frames), 201 Created (new order made), 400 (bad request body) and 401 Unauthorized (wrong or missing credentials).