logrus/json_formatter.go

33 lines
730 B
Go

package logrus
import (
"encoding/json"
"fmt"
"time"
)
type JSONFormatter struct{}
func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
data := make(Fields, len(entry.Data)+3)
for k, v := range entry.Data {
// Otherwise errors are ignored by `encoding/json`
// https://github.com/Sirupsen/logrus/issues/137
if err, ok := v.(error); ok {
data[k] = err.Error()
} else {
data[k] = v
}
}
prefixFieldClashes(data)
data["time"] = entry.Time.Format(time.RFC3339)
data["msg"] = entry.Message
data["level"] = entry.Level.String()
serialized, err := json.Marshal(data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}