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"Fix" data race

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This commit is contained in:
Philipp Heckel 2022-06-22 13:47:54 -04:00
parent edfc1b78a1
commit ed9d99fd57
1 changed files with 7 additions and 0 deletions
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7
server/server.go
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@ -798,6 +798,13 @@ func (s *Server) handleSubscribeHTTP(w http.ResponseWriter, r *http.Request, v *
return err
}
var wlock sync.Mutex
defer func() {
// Hack: This is the fix for a horrible data race that I have not been able to figure out in quite some time.
// It appears to be happening when the Go HTTP code reads from the socket when closing the request (i.e. AFTER
// this function returns), and causes a data race with the ResponseWriter. Locking wlock here silences the
// data race detector. See https://github.com/binwiederhier/ntfy/issues/338#issuecomment-1163425889.
wlock.TryLock()
}()
sub := func(v *visitor, msg *message) error {
if !filters.Pass(msg) {
return nil