gotosocial/internal/log/trimhook.go
tobi 728c4a5e38
[bugfix] Trim log entries to 1700 chars before they enter syslog (#493)
* start implementing trimming hook

* add test with very long test

* test syslog w/ unix socket + long (trimmed) msg

* trim long entries with trimhook

* trim to 1700 chars instead
2022-04-26 17:55:24 +02:00

53 lines
1.6 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package log
import (
"github.com/sirupsen/logrus"
)
// trimHook is a wrapper round a logrus hook that trims the *entry.Message
// to no more than 1700 characters before sending it through to the wrapped hook,
// to avoid spamming syslog with messages that are too long for it.
type trimHook struct {
wrappedHook logrus.Hook
}
func (t *trimHook) Fire(e *logrus.Entry) error {
// only copy/truncate if we need to
if len(e.Message) < 1700 {
return t.wrappedHook.Fire(e)
}
// it's too long, truncate + fire a copy of the entry so we don't meddle with the original
return t.wrappedHook.Fire(&logrus.Entry{
Logger: e.Logger,
Data: e.Data,
Time: e.Time,
Level: e.Level,
Caller: e.Caller,
Message: e.Message[:1696] + "...", // truncate
Buffer: e.Buffer,
Context: e.Context,
})
}
func (t *trimHook) Levels() []logrus.Level {
return t.wrappedHook.Levels()
}