backup/email.go
2022-10-08 10:49:28 +08:00

97 lines
1.8 KiB
Go

package main
import (
"encoding/base64"
"log"
"net/smtp"
"strings"
"time"
)
type Email struct {
startTime time.Time
items []string
}
type EmailConfig struct {
SmtpHost string `json:"smtp"`
FromEmail string `json:"email_from"`
ToEmail []string `json:"email_to"`
}
func SendMail(addr, from, subject, body string, to []string) error {
if *debugFlag {
log.Printf("SendMail : Start")
}
r := strings.NewReplacer("\r\n", "", "\r", "", "\n", "", "%0a", "", "%0d", "")
c, err := smtp.Dial(addr)
if err != nil {
if *debugFlag {
log.Printf("SendMail : %s : smtp.Dial (%s)", addr, err)
}
return err
}
defer c.Close()
if err = c.Mail(r.Replace(from)); err != nil {
if *debugFlag {
log.Printf("SendMail : %s : client.Mail (%s)", from, err)
}
return err
}
for i := range to {
to[i] = r.Replace(to[i])
if err = c.Rcpt(to[i]); err != nil {
if *debugFlag {
log.Printf("SendMail : %s : client.Rcpt (%s)", to[i], err)
}
return err
}
}
w, err := c.Data()
if err != nil {
if *debugFlag {
log.Printf("SendMail : client.Data (%s)", err)
}
return err
}
msg := "Date:" + time.Now().Format("Mon, 02 Jan 2006 15:04:05 -0700") + "\r\n" +
"To: " + strings.Join(to, ",") + "\r\n" +
"From: " + from + "\r\n" +
"Subject: " + subject + "\r\n" +
"Content-Type: text/html; charset=\"UTF-8\"\r\n" +
"Content-Transfer-Encoding: base64\r\n" +
"\r\n" + base64.StdEncoding.EncodeToString([]byte(body))
if *debugFlag {
log.Printf("SendMail :\r\n%s", msg)
}
_, err = w.Write([]byte(msg))
if err != nil {
if *debugFlag {
log.Printf("SendMail : writer.Write (%s)", err)
}
return err
}
err = w.Close()
if err != nil {
if *debugFlag {
log.Printf("SendMail : writer.Close (%s)", err)
}
return err
}
err = c.Quit()
if *debugFlag {
log.Printf("SendMail : client.Quit (%s)", err)
}
return err
}