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// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package mailer
import (
"crypto/tls"
"fmt"
"net"
"net/mail"
"net/smtp"
"strings"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/setting"
)
type Message struct {
To []string
From string
Subject string
Body string
Type string
Massive bool
Info string
}
// create mail content
func (m Message) Content() string {
// set mail type
contentType := "text/plain; charset=UTF-8"
if m.Type == "html" {
contentType = "text/html; charset=UTF-8"
}
// create mail content
content := "From: " + m.From + "\r\nSubject: " + m.Subject + "\r\nContent-Type: " + contentType + "\r\n\r\n" + m.Body
return content
}
var mailQueue chan *Message
func NewMailerContext() {
mailQueue = make(chan *Message, setting.Cfg.Section("mailer").Key("SEND_BUFFER_LEN").MustInt(10))
go processMailQueue()
}
func processMailQueue() {
for {
select {
case msg := <-mailQueue:
num, err := Send(msg)
tos := strings.Join(msg.To, "; ")
info := ""
if err != nil {
if len(msg.Info) > 0 {
info = ", info: " + msg.Info
}
log.Error(4, fmt.Sprintf("Async sent email %d succeed, not send emails: %s%s err: %s", num, tos, info, err))
} else {
log.Trace(fmt.Sprintf("Async sent email %d succeed, sent emails: %s%s", num, tos, info))
}
}
}
}
// sendMail allows mail with self-signed certificates.
func sendMail(settings *setting.Mailer, recipients []string, msgContent []byte) error {
host, port, err := net.SplitHostPort(settings.Host)
if err != nil {
return err
}
tlsconfig := &tls.Config{
InsecureSkipVerify: settings.SkipVerify,
ServerName: host,
}
conn, err := net.Dial("tcp", net.JoinHostPort(host, port))
if err != nil {
return err
}
defer conn.Close()
isSecureConn := false
// Start TLS directly if the port ends with 465 (SMTPS protocol)
if strings.HasSuffix(port, "465") {
conn = tls.Client(conn, tlsconfig)
isSecureConn = true
}
client, err := smtp.NewClient(conn, host)
if err != nil {
return err
}
// If not using SMTPS, alway use STARTTLS if available
hasStartTLS, _ := client.Extension("STARTTLS")
if !isSecureConn && hasStartTLS {
if err = client.StartTLS(tlsconfig); err != nil {
return err
}
}
canAuth, options := client.Extension("AUTH")
if canAuth && len(settings.User) > 0 {
var auth smtp.Auth
if strings.Contains(options, "CRAM-MD5") {
auth = smtp.CRAMMD5Auth(settings.User, settings.Passwd)
} else if strings.Contains(options, "PLAIN") {
auth = smtp.PlainAuth("", settings.User, settings.Passwd, host)
}
if auth != nil {
if err = client.Auth(auth); err != nil {
return err
}
}
}
if fromAddress, err := mail.ParseAddress(settings.From); err != nil {
return err
} else {
if err = client.Mail(fromAddress.Address); err != nil {
return err
}
}
for _, rec := range recipients {
if err = client.Rcpt(rec); err != nil {
return err
}
}
w, err := client.Data()
if err != nil {
return err
}
if _, err = w.Write([]byte(msgContent)); err != nil {
return err
}
if err = w.Close(); err != nil {
return err
}
return client.Quit()
}
// Direct Send mail message
func Send(msg *Message) (int, error) {
log.Trace("Sending mails to: %s", strings.Join(msg.To, "; "))
// get message body
content := msg.Content()
if len(msg.To) == 0 {
return 0, fmt.Errorf("empty receive emails")
} else if len(msg.Body) == 0 {
return 0, fmt.Errorf("empty email body")
}
if msg.Massive {
// send mail to multiple emails one by one
num := 0
for _, to := range msg.To {
body := []byte("To: " + to + "\r\n" + content)
err := sendMail(setting.MailService, []string{to}, body)
if err != nil {
return num, err
}
num++
}
return num, nil
} else {
body := []byte("To: " + strings.Join(msg.To, ";") + "\r\n" + content)
// send to multiple emails in one message
err := sendMail(setting.MailService, msg.To, body)
if err != nil {
return 0, err
} else {
return 1, nil
}
}
}
// Async Send mail message
func SendAsync(msg *Message) {
go func() {
mailQueue <- msg
}()
}
// Create html mail message
func NewHtmlMessage(To []string, From, Subject, Body string) Message {
return Message{
To: To,
From: From,
Subject: Subject,
Body: Body,
Type: "html",
}
}
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