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Beego/logs/smtp.go

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package logs
import (
"encoding/json"
"fmt"
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"net/smtp"
"strings"
"time"
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)
const (
subjectPhrase = "Diagnostic message from server"
)
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// smtpWriter implements LoggerInterface and is used to send emails via given SMTP-server.
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type SmtpWriter struct {
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Username string `json:"Username"`
Password string `json:"password"`
Host string `json:"Host"`
Subject string `json:"subject"`
RecipientAddresses []string `json:"sendTos"`
Level int `json:"level"`
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}
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// create smtp writer.
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func NewSmtpWriter() LoggerInterface {
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return &SmtpWriter{Level: LevelTrace}
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}
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// init smtp writer with json config.
// config like:
// {
// "Username":"example@gmail.com",
// "password:"password",
// "host":"smtp.gmail.com:465",
// "subject":"email title",
// "sendTos":["email1","email2"],
// "level":LevelError
// }
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func (s *SmtpWriter) Init(jsonconfig string) error {
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err := json.Unmarshal([]byte(jsonconfig), s)
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if err != nil {
return err
}
return nil
}
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// write message in smtp writer.
// it will send an email with subject and only this message.
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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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hp := strings.Split(s.Host, ":")
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// Set up authentication information.
auth := smtp.PlainAuth(
"",
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s.Username,
s.Password,
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hp[0],
)
// Connect to the server, authenticate, set the sender and recipient,
// and send the email all in one step.
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 +
">\r\nSubject: " + s.Subject + "\r\n" + content_type + "\r\n\r\n" + fmt.Sprintf(".%s", time.Now().Format("2006-01-02 15:04:05")) + 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,
s.RecipientAddresses,
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mailmsg,
)
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return err
}
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// implementing method. empty.
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func (s *SmtpWriter) Flush() {
return
}
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// implementing method. empty.
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func (s *SmtpWriter) Destroy() {
return
}
func init() {
Register("smtp", NewSmtpWriter)
}