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Sec-WebSocket-Version Header

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About

The HTTP Sec-WebSocket-Version request and response header is used in the WebSocket opening handshake to indicate the WebSocket protocol supported by the client, and the protocol versions supported by the server if it does not support the version specified in the request1.

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References

  1. MDN. “Sec-WebSocket-Version header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Sec-WebSocket-Version. (Accessed: [2025-05-20 Tue 07:38]). ↩︎

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