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transformer.go
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transformer.go
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// Copyright (c) 2019-2023 Vincent Cheung (coolingfall@gmail.com).
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package logrus
import (
"bytes"
"sync"
"github.com/coolerfall/lork"
"github.com/sirupsen/logrus"
)
var (
logrusLvlToLorkLvl = map[logrus.Level]lork.Level{
logrus.TraceLevel: lork.TraceLevel,
logrus.DebugLevel: lork.DebugLevel,
logrus.InfoLevel: lork.InfoLevel,
logrus.WarnLevel: lork.WarnLevel,
logrus.ErrorLevel: lork.ErrorLevel,
logrus.FatalLevel: lork.FatalLevel,
logrus.PanicLevel: lork.PanicLevel,
}
)
type transformer struct {
buf *bytes.Buffer
locker sync.Mutex
multiWriter *lork.MultiWriter
}
func newTransformer(w *lork.MultiWriter) *transformer {
return &transformer{
buf: new(bytes.Buffer),
multiWriter: w,
}
}
func (t *transformer) Write(p []byte) (n int, err error) {
t.locker.Lock()
defer t.locker.Unlock()
_ = lork.ReplaceJson(p, t.buf, lork.LevelFieldKey,
func(k, v []byte) ([]byte, []byte, error) {
lvl, err := logrus.ParseLevel(string(v))
if err != nil {
return k, v, err
} else {
return k, []byte(logrusLvlToLorkLvl[lvl].String()), nil
}
})
p = t.buf.Bytes()
t.buf.Reset()
return t.multiWriter.Write(p)
}