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linux.go
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linux.go
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//go:build !windows && !plan9
// +build !windows,!plan9
package syslog
import (
"encoding/json"
sys "log/syslog"
"strings"
"github.com/eolinker/eosc"
"github.com/eolinker/eosc/formatter"
)
// CreateTransporter 创建syslog-Transporter
func CreateTransporter(conf *Config) (*SysWriter, error) {
fm, w, err := create(conf)
if err != nil {
return nil, err
}
return &SysWriter{
writer: w,
formatter: fm,
}, nil
}
const defaultTag = "apinto"
type SysWriter struct {
writer *sys.Writer
formatter eosc.IFormatter
}
func (s *SysWriter) output(entry eosc.IEntry) error {
if s.formatter == nil || s.writer == nil {
return nil
}
data := s.formatter.Format(entry)
if len(data) == 0 {
return nil
}
_, err := s.writer.Write(data)
return err
}
func (s *SysWriter) stop() error {
err := s.writer.Close()
if err != nil {
return err
}
s.writer = nil
s.formatter = nil
return nil
}
func create(cfg *Config) (eosc.IFormatter, *sys.Writer, error) {
factory, has := formatter.GetFormatterFactory(cfg.Type)
if !has {
return nil, nil, errFormatterType
}
var extentCfg []byte
if cfg.Type == "json" {
extentCfg, _ = json.Marshal(cfg.ContentResize)
}
fm, err := factory.Create(cfg.Formatter, extentCfg)
if err != nil {
return nil, nil, err
}
w, err := newSysWriter(cfg, "")
if err != nil {
return nil, nil, err
}
return fm, w, nil
}
func (s *SysWriter) reset(cfg *Config) error {
fm, w, err := create(cfg)
if err != nil {
return err
}
o := s.writer
s.formatter, s.writer = fm, w
if o != nil {
o.Close()
}
return nil
}
func newSysWriter(conf *Config, tag string) (*sys.Writer, error) {
if tag == "" {
tag = defaultTag
}
return sys.Dial(strings.ToLower(conf.Network), conf.Address, parseLevel(conf.Level), tag)
}
func parseLevel(level string) sys.Priority {
switch strings.ToLower(level) {
case "error":
return sys.LOG_ERR
case "warn", "warning":
return sys.LOG_WARNING
case "info":
return sys.LOG_INFO
case "debug", "trace":
return sys.LOG_DEBUG
}
return sys.LOG_ERR
}