logmania/lib/syslog/main.go

78 lines
1.4 KiB
Go

package syslog
import (
"fmt"
"regexp"
"strconv"
"strings"
"time"
)
type SyslogMessage struct {
Timestemp time.Time
Hostname string
Tag string
Service int
Content string
Facility int
Severity int
}
func Parse(binaryMsg []byte) *SyslogMessage {
var err error
msg := &SyslogMessage{}
re := regexp.MustCompile("<([0-9]*)>(.*)")
match := re.FindStringSubmatch(string(binaryMsg))
prio, _ := strconv.Atoi(match[1])
msg.Facility = prio / 8
msg.Severity = prio % 8
timeLength := len(time.RFC3339)
if len(match[2]) > timeLength {
msg.Timestemp, err = time.Parse(time.RFC3339, match[2][:timeLength])
if err != nil {
timeLength = 0
}
}
timeLength = len(msg.Timestemp.Format(time.Stamp))
if len(match[2]) > timeLength {
msg.Timestemp, err = time.Parse(time.Stamp, match[2][:timeLength])
if err != nil {
timeLength = 0
}
}
msg.Content = match[2][timeLength:]
/*
TODO: detect other parts in content
- Hostname (if exists)
- Tag
- Service
*/
return msg
}
func (msg *SyslogMessage) Priority() int {
return msg.Facility*8 + msg.Severity
}
func (msg *SyslogMessage) Dump() []byte {
result := fmt.Sprintf("<%d>%s %s %s[%d]: %s",
msg.Priority(),
msg.Timestemp.Format(time.RFC3339),
msg.Hostname,
msg.Tag,
msg.Service,
msg.Content,
)
if !strings.HasSuffix(msg.Content, "\n") {
result = fmt.Sprintf("%s\n", result)
}
return []byte(result)
}