http-ws-reference

A simple reference for overlapping HTTP/WS close codes

Inspiration

IANA Websocket Close Code Registry

Websocket Specification IETF

Category	HTTP Status Code	HTTP Status Text	WebSocket Close Code	WebSocket Close Text	Description
Success/Normal Closure	200	OK	1000	Normal Closure	The request was successfully processed, or the connection was closed normally.
No Status/No Response Received	204	No Content	1005	No Status Received	No additional information is provided, or no status was received.
Protocol Error/Bad Request	400	Bad Request	1002	Protocol Error	The request contained malformed syntax or protocol violations.
Invalid Data/Bad Request	400	Bad Request	1007	Invalid Frame Payload Data	The server detected invalid data (e.g., invalid encoding) in the request or payload.
Unauthorized Access	401	Unauthorized	3000	Unauthorized	The client attempted an unauthorized action.
Policy Violation/Forbidden	403	Forbidden	1008	Policy Violation	The request violated server policies, or access was forbidden.
Unsupported Media Type/Unsupported Data	415	Unsupported Media Type	1003	Unsupported Data	The client sent data that is not supported by the server.
Payload Too Large/Message Too Big	413	Payload Too Large	1009	Message Too Big	The message/request size exceeds server limits.
Unsupported Extension/Required Extensions Not Met	426	Upgrade Required	1010	Mandatory Extension	The client expected a specific protocol extension that was not agreed upon.
Bad Gateway/Gateway Timeout	502	Bad Gateway	1014	Bad Gateway	The server received an invalid response from an upstream server.
Service Unavailable/Service Restart	503	Service Unavailable	1012	Service Restart	The server is restarting, causing the connection to terminate.
Service Unavailable/Try Again Later	503	Service Unavailable	1013	Try Again Later	The server is currently overloaded; client should try again later.
Handshake Error/TLS Required	426	Upgrade Required	1015	TLS Handshake	The client attempted to connect without the required TLS handshake or protocol.
Internal Server Error	500	Internal Server Error	1006	Abnormal Closure	The connection closed unexpectedly, likely due to an internal server error.
Internal Server Error	500	Internal Server Error	1011	Internal Error	The server encountered an unexpected condition, leading to an error.
Custom/Private Codes	-	-	4000-4999	Reserved for Private Use	Both HTTP and WebSocket provide ranges for application-specific, non-standard error handling.