forked from github-mirrors/zerolog
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
// +build !windows
|
|
// +build !binary_log
|
|
|
|
package zlog
|
|
|
|
import (
|
|
"io"
|
|
)
|
|
|
|
// See http://cee.mitre.org/language/1.0-beta1/clt.html#syslog
|
|
// or https://www.rsyslog.com/json-elasticsearch/
|
|
const ceePrefix = "@cee:"
|
|
|
|
// SyslogWriter is an interface matching a syslog.Writer struct.
|
|
type SyslogWriter interface {
|
|
io.Writer
|
|
Debug(m string) error
|
|
Info(m string) error
|
|
Warning(m string) error
|
|
Err(m string) error
|
|
Emerg(m string) error
|
|
Crit(m string) error
|
|
}
|
|
|
|
type syslogWriter struct {
|
|
w SyslogWriter
|
|
prefix string
|
|
}
|
|
|
|
// SyslogLevelWriter wraps a SyslogWriter and call the right syslog level
|
|
// method matching the zlog level.
|
|
func SyslogLevelWriter(w SyslogWriter) LevelWriter {
|
|
return syslogWriter{w, ""}
|
|
}
|
|
|
|
// SyslogCEEWriter wraps a SyslogWriter with a SyslogLevelWriter that adds a
|
|
// MITRE CEE prefix for JSON syslog entries, compatible with rsyslog
|
|
// and syslog-ng JSON logging support.
|
|
// See https://www.rsyslog.com/json-elasticsearch/
|
|
func SyslogCEEWriter(w SyslogWriter) LevelWriter {
|
|
return syslogWriter{w, ceePrefix}
|
|
}
|
|
|
|
func (sw syslogWriter) Write(p []byte) (n int, err error) {
|
|
var pn int
|
|
if sw.prefix != "" {
|
|
pn, err = sw.w.Write([]byte(sw.prefix))
|
|
if err != nil {
|
|
return pn, err
|
|
}
|
|
}
|
|
n, err = sw.w.Write(p)
|
|
return pn + n, err
|
|
}
|
|
|
|
// WriteLevel implements LevelWriter interface.
|
|
func (sw syslogWriter) WriteLevel(level Level, p []byte) (n int, err error) {
|
|
switch level {
|
|
case TraceLevel:
|
|
case DebugLevel:
|
|
err = sw.w.Debug(sw.prefix + string(p))
|
|
case InfoLevel:
|
|
err = sw.w.Info(sw.prefix + string(p))
|
|
case WarnLevel:
|
|
err = sw.w.Warning(sw.prefix + string(p))
|
|
case ErrorLevel:
|
|
err = sw.w.Err(sw.prefix + string(p))
|
|
case FatalLevel:
|
|
err = sw.w.Emerg(sw.prefix + string(p))
|
|
case PanicLevel:
|
|
err = sw.w.Crit(sw.prefix + string(p))
|
|
case NoLevel:
|
|
err = sw.w.Info(sw.prefix + string(p))
|
|
default:
|
|
panic("invalid level")
|
|
}
|
|
// Any CEE prefix is not part of the message, so we don't include its length
|
|
n = len(p)
|
|
return
|
|
}
|