Error

<aside> 💡 Endpoints MAY use the following pre-defined status codes when sending a Close frame.

</aside>

RFC 6455: The WebSocket Protocol

코드	요약	내용
1000	a normal closure	the purpose for which the connection was established has been fulfilled
1001	an endpoint is "going away"	such as a server going down
or a browser having navigated away from a page
1002	connection terminated:
protocol error	an endpoint is terminating the connection due to a protocol error
1003	connection terminated:
unacceptable data type	an endpoint is terminating the connection because it has received a type of data it cannot accept
(e.g., an endpoint that understands only text data MAY send this if it receives a binary message)
1004	- (Reserved)	-
1005	- (Reserved)	-
1006	- (Reserved)	-
1007	connection terminated:
inconsistent data type	an endpoint is terminating the connection because it has received data within a message that was not consistent with the type of the message
(e.g., non-UTF-8 [RFC3629] data within a text message).
1008	generic status code
for policy violation	an endpoint is terminating the connection because it has received a message that violates its policy. This is a generic status code that can be returned when there is no other more suitable status code (e.g., 1003 or 1009) or if there is a need to hide specific details about the policy.
1009	connection terminated:
message too long	an endpoint is terminating the connection because it has received a message that is too big for it to process.
1010	no extension negotiated	an endpoint (client) is terminating the connection because it has expected the server to negotiate one or more extension, but the server didn't return them in the response message of the WebSocket handshake.

The list of extensions that are needed SHOULD appear in the /reason/ part of the Close frame. Note that this status code is NOT used by the server, because it can fail the WebSocket handshake instead. | | 1011 | | a server is terminating the connection because it encountered an unexpected condition that prevented it from fulfilling the request. | | 1015 | - (Reserved) | - |