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# http-ws-reference # http-ws-reference
A simple reference for overlapping HTTP/WS close codes
[Inspiration](https://github.com/Luka967/websocket-close-codes)
[IANA Websocket Close Code Registry](https://www.iana.org/assignments/websocket/websocket.xhtml#close-code-number)
[Websocket Specification IETF](https://datatracker.ietf.org/doc/html/rfc6455#section-7.4)
| **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. |