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reverseproxy: preserve RFC WebSocket key casing (#8363)

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Zen Dodd authored and GitHub committed 2026-11-05 03:54:16 -05:00
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commit a0cb97b322
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modules/caddyhttp/reverseproxy/reverseproxy.go
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@@ -655,7 +655,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht
if randErr != nil {
return randErr
}
clonedReq.Header.Del("Sec-WebSocket-Key")
clonedReq.Header.Del("Sec-WebSocket-Key") //nolint:canonicalheader // RFC 6455 casing, see normalizeWebsocketHeaders
clonedReq.Header["Sec-WebSocket-Key"] = []string{base64.StdEncoding.EncodeToString(key)} //nolint:canonicalheader // RFC 6455 casing, see normalizeWebsocketHeaders
}