132 lines
3.7 KiB
Go
132 lines
3.7 KiB
Go
// This file is part of the happyDomain (R) project.
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// Copyright (c) 2020-2024 happyDomain
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// Authors: Pierre-Olivier Mercier, et al.
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//
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// This program is offered under a commercial and under the AGPL license.
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// For commercial licensing, contact us at <contact@happydomain.org>.
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//
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// For AGPL licensing:
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package utils
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import (
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"crypto/tls"
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"flag"
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"strconv"
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"time"
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gomail "github.com/go-mail/mail"
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)
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var (
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smtpSendmail *SMTPSendmail = nil
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smtpSendmailTLSSNoVerify bool = false
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)
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// SMTPSendmail uses a SMTP server to send message
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type SMTPSendmail struct {
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Dialer *gomail.Dialer
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}
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// Send sends an e-mail to the given recipients using configured SMTP host.
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func (t *SMTPSendmail) PrepareAndSend(m ...*gomail.Message) (err error) {
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if smtpSendmailTLSSNoVerify {
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SendMethod.(*SMTPSendmail).Dialer.TLSConfig = &tls.Config{
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ServerName: SendMethod.(*SMTPSendmail).Dialer.Host,
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InsecureSkipVerify: true,
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}
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}
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err = t.Dialer.DialAndSend(m...)
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return
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}
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func changeSendMethodToSMTP() {
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if _, ok := SendMethod.(*SMTPSendmail); !ok {
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if smtpSendmail == nil {
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smtpSendmail = &SMTPSendmail{
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Dialer: &gomail.Dialer{
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Timeout: 10 * time.Second,
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RetryFailure: true,
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},
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}
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}
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SendMethod = smtpSendmail
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}
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}
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type smtpSendmailHostname struct{}
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func (s *smtpSendmailHostname) Set(value string) (err error) {
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changeSendMethodToSMTP()
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SendMethod.(*SMTPSendmail).Dialer.Host = value
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return
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}
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func (s *smtpSendmailHostname) String() string {
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return "smtp.happydomain.org"
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}
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type smtpSendmailPort struct{}
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func (s *smtpSendmailPort) Set(value string) (err error) {
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changeSendMethodToSMTP()
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SendMethod.(*SMTPSendmail).Dialer.Port, err = strconv.Atoi(value)
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if err != nil {
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return
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}
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SendMethod.(*SMTPSendmail).Dialer.SSL = SendMethod.(*SMTPSendmail).Dialer.Port == 465
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return
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}
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func (s *smtpSendmailPort) String() string {
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return "465"
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}
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type smtpSendmailUsername struct{}
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func (s *smtpSendmailUsername) Set(value string) (err error) {
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changeSendMethodToSMTP()
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SendMethod.(*SMTPSendmail).Dialer.Username = value
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return
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}
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func (s *smtpSendmailUsername) String() string {
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return ""
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}
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type smtpSendmailPassword struct{}
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func (s *smtpSendmailPassword) Set(value string) (err error) {
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changeSendMethodToSMTP()
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SendMethod.(*SMTPSendmail).Dialer.Password = value
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return
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}
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func (s *smtpSendmailPassword) String() string {
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return ""
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}
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func init() {
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flag.BoolVar(&smtpSendmailTLSSNoVerify, "mail-smtp-tls-no-verify", false, "Do not verify certificate validity on SMTP connection")
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flag.Var(&smtpSendmailHostname{}, "mail-smtp-host", "Use the given SMTP server as default way to send emails")
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flag.Var(&smtpSendmailPort{}, "mail-smtp-port", "Define the port to use to send e-mail through SMTP method")
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flag.Var(&smtpSendmailUsername{}, "mail-smtp-username", "If the SMTP server requires authentication, fill with the username to authenticate with")
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flag.Var(&smtpSendmailPassword{}, "mail-smtp-password", "Password associated with the given username for SMTP authentication")
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}
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