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homebox/backend/pkgs/mailer/mailer.go

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2022-08-30 02:30:36 +00:00
package mailer
import (
"encoding/base64"
"fmt"
"mime"
"net/smtp"
"strconv"
)
type Mailer struct {
Host string `json:"host,omitempty"`
Port int `json:"port,omitempty"`
Username string `json:"username,omitempty"`
Password string `json:"password,omitempty"`
From string `json:"from,omitempty"`
}
func (m *Mailer) Ready() bool {
return m.Host != "" && m.Port != 0 && m.Username != "" && m.Password != "" && m.From != ""
}
func (m *Mailer) server() string {
return m.Host + ":" + strconv.Itoa(m.Port)
}
func (m *Mailer) Send(msg *Message) error {
server := m.server()
header := make(map[string]string)
header["From"] = msg.From.String()
header["To"] = msg.To.String()
header["Subject"] = mime.QEncoding.Encode("UTF-8", msg.Subject)
header["MIME-Version"] = "1.0"
header["Content-Type"] = "text/html; charset=\"utf-8\""
header["Content-Transfer-Encoding"] = "base64"
message := ""
for k, v := range header {
message += fmt.Sprintf("%s: %s\r\n", k, v)
}
message += "\r\n" + base64.StdEncoding.EncodeToString([]byte(msg.Body))
return smtp.SendMail(
server,
smtp.PlainAuth("", m.Username, m.Password, m.Host),
m.From,
[]string{msg.To.Address},
[]byte(message),
)
}