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Sec-WebSocket-Extensions Header

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About

The HTTP Sec-WebSocket-Extensions request and response header is used in the WebSocket opening handshake to negotiate a protocol extension used by the client and server1.

Anki

References

  1. MDN. “Sec-WebSocket-Extensions header”. Available at: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Sec-WebSocket-Extensions. (Accessed: [2025-05-20 Tue 06:47]). ↩︎

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