-// Return a new context that gets cancelled by resp's CloseNotifier.
-func contextForResponse(parent context.Context, resp http.ResponseWriter) (context.Context, context.CancelFunc) {
- ctx, cancel := context.WithCancel(parent)
- if cn, ok := resp.(http.CloseNotifier); ok {
- go func(c <-chan bool) {
- select {
- case <-c:
- cancel()
- case <-ctx.Done():
- }
- }(cn.CloseNotify())
- }
- return ctx, cancel
-}
-