WebSocketCloseCode

Normal connection closure.

Endpoint left (browser tab closing).

Endpoint received a malformed frame.

Endpoint received an unsupported frame.

Expected close status, received none.

No close code frame has been received.

Endpoint received inconsistent message.

Received message violates endpoint policy.

Too big frame.

Client wanted an extension which server does not negotiate.

Internal server error while operating.

Server/service is restarting.

Temporary server condition forced blocking the client’s request.

Server acting as gateway received an invalid response.

Failed to perform a TLS handshake.