Extensions

WebSocket allow extending using middlewares.

Bundled middlewares

These general use middlewares are available in this library.

Standard middlewares

• CloseHandler - Automatically acts on incoming and outgoing Close requests, as specified in WebSocket protocol
• PingResponder - Responds with Pong message when receiving a Ping message, as specified in WebSocket protocol

Optional middlewares

• Callback - Apply provided callback function on specified actions
• CompressionExtension - Support message compression (Per-Message Deflate)
• FollowRedirect - Follow redirect during handshake (Client only)
• PingInterval - Used to automatically send Ping messages at specified interval
• SubprotocolNegotiation - Helper middleware that negotiate subprotocol

External middlewares

• GraphQL Server - GraphQL server over WebSocket