98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
package logs
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import (
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"encoding/json"
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"errors"
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"net/smtp"
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"strings"
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)
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const (
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subjectPhrase = "Diagnostic message from server"
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)
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// smtpWriter is used to send emails via given SMTP-server.
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type SmtpWriter struct {
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username string
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password string
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host string
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subject string
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recipientAddresses []string
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level int
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}
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func NewSmtpWriter() LoggerInterface {
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return &SmtpWriter{level: LevelTrace}
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}
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func (s *SmtpWriter) Init(jsonconfig string) error {
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var m map[string]interface{}
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err := json.Unmarshal([]byte(jsonconfig), &m)
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if err != nil {
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return err
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}
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if username, ok := m["username"]; !ok {
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return errors.New("smtp config must have auth username")
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} else if password, ok := m["password"]; !ok {
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return errors.New("smtp config must have auth password")
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} else if hostname, ok := m["host"]; !ok {
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return errors.New("smtp config must have host like 'mail.example.com:25'")
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} else if sendTos, ok := m["sendTos"]; !ok {
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return errors.New("smtp config must have sendTos")
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} else {
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s.username = username.(string)
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s.password = password.(string)
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s.host = hostname.(string)
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for _, v := range sendTos.([]interface{}) {
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s.recipientAddresses = append(s.recipientAddresses, v.(string))
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}
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}
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if subject, ok := m["subject"]; ok {
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s.subject = subject.(string)
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} else {
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s.subject = subjectPhrase
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}
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if lv, ok := m["level"]; ok {
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s.level = int(lv.(float64))
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}
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return nil
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}
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func (s *SmtpWriter) WriteMsg(msg string, level int) error {
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if level < s.level {
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return nil
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}
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hp := strings.Split(s.host, ":")
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// Set up authentication information.
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auth := smtp.PlainAuth(
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"",
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s.username,
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s.password,
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hp[0],
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)
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// Connect to the server, authenticate, set the sender and recipient,
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// and send the email all in one step.
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content_type := "Content-Type: text/plain" + "; charset=UTF-8"
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mailmsg := []byte("To: " + strings.Join(s.recipientAddresses, ";") + "\r\nFrom: " + s.username + "<" + s.username +
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">\r\nSubject: " + s.subject + "\r\n" + content_type + "\r\n\r\n" + msg)
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err := smtp.SendMail(
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s.host,
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auth,
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s.username,
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s.recipientAddresses,
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mailmsg,
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)
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return err
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}
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func (s *SmtpWriter) Destroy() {
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return
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}
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func init() {
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Register("smtp", NewSmtpWriter)
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}
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