Function is_websocket_upgrade

crates/openshell-server/src/service_routing.rs:485–489

(req: &Request<B>)

}

fn is_websocket_upgrade<B>(req: &Request<B>) -> bool {
    req.method() == Method::GET
        && header_value_is(req.headers(), header::UPGRADE, "websocket")
        && header_contains_token(req.headers(), header::CONNECTION, "upgrade")
}

fn header_value_is(headers: &HeaderMap, name: header::HeaderName, expected: &str) -> bool {
    headers