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syslog.go
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syslog.go
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//go:build !windows && !plan9
package syslog
import (
"bytes"
"fmt"
"log/syslog"
"github.com/go-kratos/kratos/v2/log"
)
type Config struct {
Network string
Addr string
Tag string
}
type Logger struct {
config *Config
conn *syslog.Writer
}
var _ log.Logger = (*Logger)(nil)
func New(config *Config) *Logger {
return &Logger{
config: config,
}
}
func (l *Logger) Log(level log.Level, keyvals ...interface{}) error {
if l.conn == nil {
if err := l.connect(); err != nil {
return err
}
}
if len(keyvals) == 0 {
return nil
}
if (len(keyvals) & 1) == 1 {
keyvals = append(keyvals, "KEYVALS UNPAIRED")
}
var buf bytes.Buffer
buf.WriteString(level.String())
for i := 0; i < len(keyvals); i += 2 {
_, _ = fmt.Fprintf(&buf, " %s=%v", keyvals[i], keyvals[i+1])
}
switch level {
case log.LevelDebug:
return l.conn.Debug(buf.String())
case log.LevelInfo:
return l.conn.Info(buf.String())
case log.LevelWarn:
return l.conn.Warning(buf.String())
case log.LevelError:
return l.conn.Err(buf.String())
case log.LevelFatal:
return l.conn.Crit(buf.String())
default:
return l.conn.Debug(buf.String())
}
}
func (l *Logger) connect() error {
var err error
l.conn, err = syslog.Dial(l.config.Network, l.config.Addr, syslog.LOG_USER, l.config.Tag)
return err
}
func (l *Logger) Close() error {
if l.conn == nil {
return nil
}
return l.conn.Close()
}