Websockets Keep Alive Timeout

Keep-Alive Timeout for WebSockets

The WebSockets middleware can now be configured for keep-alive timeouts.

The keep-alive timeout aborts the WebSocket connection and throws an exception from WebSocket.ReceiveAsync if both of the following conditions are met:

• The server sends a ping frame using the websocket protocol.
• The client doesn't reply with a pong frame within the specified timeout.

The server automatically sends the ping frame and configures it with KeepAliveInterval.

The keep-alive timeout setting is useful for detecting connections that might be slow or ungracefully disconnected.

The keep-alive timeout can be configured globally for the WebSocket middleware:

[!code-csharp]

Or configured per accepted WebSocket:

[!code-csharp]