pub fn build_accept_response(
key: &str,
subprotocol: Option<&str>,
extensions: Option<&str>,
) -> StringExpand description
Build the 101 Switching Protocols response for a validated handshake.
Sec-WebSocket-Accept is base64(SHA-1(key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11")),
computed by tungstenite::handshake::derive_accept_key — the same crate that then parses
the frames, so there is exactly one implementation of the GUID concatenation in the tree.