Method select_protocol

crates/client-api/src/util/websocket.rs:147–161

Select a subprotocol from the ones provided, and prepare a response for the client.

(
        self,
        protocols: impl IntoIterator<Item = (S, P)>,
    )

    /// Select a subprotocol from the ones provided, and prepare a response for the client.
    pub fn select_protocol<S, P>(
        self,
        protocols: impl IntoIterator<Item = (S, P)>,
    ) -> (WebSocketResponse, PendingWebSocket, Option<P>)
    where
        S: for<'a> PartialEq<&'a str> + TryInto<HeaderValue>,
    {
        let (proto_header, proto) = self
            .requested_protocol
            .as_ref()
            .and_then(|proto| proto.select(protocols))
            .unzip();
        let (resp, ws) = self.into_response(proto_header);
        (resp, ws, proto)
    }

    /// Prepare a response with no subprotocol selected.
    #[inline]