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
EnumerationNSURLSession
NSURLSession
Topics
Close Codes
NSURLSessionA reserved code that indicates the connection closed without a close control frame.
NSURLSessionA code that indicates an endpoint is going away.
NSURLSessionA code that indicates the server terminated the connection because it encountered an unexpected condition.
NSURLSessionA code that indicates the connection is still open.
NSURLSessionA code that indicates the server terminated the connection because it received data inconsistent with the message’s type.
NSURLSessionA code that indicates the client terminated the connection because the server didn’t negotiate a required extension.
NSURLSessionA code that indicates an endpoint is terminating the connection because it received a message too big for it to process.
NSURLSessionA reserved code that indicates an endpoint expected a status code and didn’t receive one.
NSURLSessionA code that indicates normal connection closure.
NSURLSessionA code that indicates an endpoint terminated the connection because it received a message that violates its policy.
NSURLSessionA code that indicates an endpoint terminated the connection due to a protocol error.
NSURLSessionA reserved code that indicates the connection closed due to the failure to perform a TLS handshake.
NSURLSessionA code that indicates an endpoint terminated the connection after receiving a type of data it can’t accept.
See Also
Closing the Connection
- cancelSends a close frame with the given close code and optional close reason.
closeA code that indicates the reason a connection closed.
closeA block of data that provides further information about why a connection closed.