A code that indicates why a WebSocket connection closed.
SDKs
- iOS 13.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
Framework
- Foundation
EnumerationURLSession
URLSession
Topics
Close Codes
case abnormalA reserved code that indicates the connection closed without a close control frame.
case goingA code that indicates an endpoint is going away.
case internalA code that indicates the server terminated the connection because it encountered an unexpected condition.
case invalidA code that indicates the connection is still open.
case invalidA code that indicates the server terminated the connection because it received data inconsistent with the message’s type.
case mandatoryA code that indicates the client terminated the connection because the server didn’t negotiate a required extension.
case messageA code that indicates an endpoint is terminating the connection because it received a message too big for it to process.
case noA reserved code that indicates an endpoint expected a status code and didn’t receive one.
case normalA code that indicates normal connection closure.
case policyA code that indicates an endpoint terminated the connection because it received a message that violates its policy.
case protocolA code that indicates an endpoint terminated the connection due to a protocol error.
case tlsA reserved code that indicates the connection closed due to the failure to perform a TLS handshake.
case unsupportedA code that indicates an endpoint terminated the connection after receiving a type of data it can’t accept.
See Also
Closing the Connection
func cancel(with: URLSessionSends a close frame with the given close code and optional close reason.
var closeA code that indicates the reason a connection closed.
var closeA block of data that provides further information about why a connection closed.