// Copyright 2014 The Gogs Authors. All rights reserved. // Copyright 2017 The Gitea 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 ( "bytes" "context" "crypto/tls" "fmt" "io" "net" "net/smtp" "os" "os/exec" "strings" "time" "code.gitea.io/gitea/modules/base" "code.gitea.io/gitea/modules/graceful" "code.gitea.io/gitea/modules/log" "code.gitea.io/gitea/modules/process" "code.gitea.io/gitea/modules/queue" "code.gitea.io/gitea/modules/setting" "github.com/jaytaylor/html2text" "gopkg.in/gomail.v2" ) // Message mail body and log info type Message struct { Info string // Message information for log purpose. FromAddress string FromDisplayName string To []string Subject string Date time.Time Body string Headers map[string][]string } // ToMessage converts a Message to gomail.Message func (m *Message) ToMessage() *gomail.Message { msg := gomail.NewMessage() msg.SetAddressHeader("From", m.FromAddress, m.FromDisplayName) msg.SetHeader("To", m.To...) for header := range m.Headers { msg.SetHeader(header, m.Headers[header]...) } if len(setting.MailService.SubjectPrefix) > 0 { msg.SetHeader("Subject", setting.MailService.SubjectPrefix+" "+m.Subject) } else { msg.SetHeader("Subject", m.Subject) } msg.SetDateHeader("Date", m.Date) msg.SetHeader("X-Auto-Response-Suppress", "All") plainBody, err := html2text.FromString(m.Body) if err != nil || setting.MailService.SendAsPlainText { if strings.Contains(base.TruncateString(m.Body, 100), "<html>") { log.Warn("Mail contains HTML but configured to send as plain text.") } msg.SetBody("text/plain", plainBody) } else { msg.SetBody("text/plain", plainBody) msg.AddAlternative("text/html", m.Body) } return msg } // SetHeader adds additional headers to a message func (m *Message) SetHeader(field string, value ...string) { m.Headers[field] = value } // NewMessageFrom creates new mail message object with custom From header. func NewMessageFrom(to []string, fromDisplayName, fromAddress, subject, body string) *Message { log.Trace("NewMessageFrom (body):\n%s", body) return &Message{ FromAddress: fromAddress, FromDisplayName: fromDisplayName, To: to, Subject: subject, Date: time.Now(), Body: body, Headers: map[string][]string{}, } } // NewMessage creates new mail message object with default From header. func NewMessage(to []string, subject, body string) *Message { return NewMessageFrom(to, setting.MailService.FromName, setting.MailService.FromEmail, subject, body) } type loginAuth struct { username, password string } // LoginAuth SMTP AUTH LOGIN Auth Handler func LoginAuth(username, password string) smtp.Auth { return &loginAuth{username, password} } // Start start SMTP login auth func (a *loginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) { return "LOGIN", []byte{}, nil } // Next next step of SMTP login auth func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) { if more { switch string(fromServer) { case "Username:": return []byte(a.username), nil case "Password:": return []byte(a.password), nil default: return nil, fmt.Errorf("unknown fromServer: %s", string(fromServer)) } } return nil, nil } // Sender SMTP mail sender type smtpSender struct { } // Send send email func (s *smtpSender) Send(from string, to []string, msg io.WriterTo) error { opts := setting.MailService host, port, err := net.SplitHostPort(opts.Host) if err != nil { return err } tlsconfig := &tls.Config{ InsecureSkipVerify: opts.SkipVerify, ServerName: host, } if opts.UseCertificate { cert, err := tls.LoadX509KeyPair(opts.CertFile, opts.KeyFile) if err != nil { return err } tlsconfig.Certificates = []tls.Certificate{cert} } conn, err := net.Dial("tcp", net.JoinHostPort(host, port)) if err != nil { return err } defer conn.Close() isSecureConn := opts.IsTLSEnabled || (strings.HasSuffix(port, "465")) // Start TLS directly if the port ends with 465 (SMTPS protocol) if isSecureConn { conn = tls.Client(conn, tlsconfig) } client, err := smtp.NewClient(conn, host) if err != nil { return fmt.Errorf("NewClient: %v", err) } if !opts.DisableHelo { hostname := opts.HeloHostname if len(hostname) == 0 { hostname, err = os.Hostname() if err != nil { return err } } if err = client.Hello(hostname); err != nil { return fmt.Errorf("Hello: %v", err) } } // If not using SMTPS, always use STARTTLS if available hasStartTLS, _ := client.Extension("STARTTLS") if !isSecureConn && hasStartTLS { if err = client.StartTLS(tlsconfig); err != nil { return fmt.Errorf("StartTLS: %v", err) } } canAuth, options := client.Extension("AUTH") if canAuth && len(opts.User) > 0 { var auth smtp.Auth if strings.Contains(options, "CRAM-MD5") { auth = smtp.CRAMMD5Auth(opts.User, opts.Passwd) } else if strings.Contains(options, "PLAIN") { auth = smtp.PlainAuth("", opts.User, opts.Passwd, host) } else if strings.Contains(options, "LOGIN") { // Patch for AUTH LOGIN auth = LoginAuth(opts.User, opts.Passwd) } if auth != nil { if err = client.Auth(auth); err != nil { return fmt.Errorf("Auth: %v", err) } } } if err = client.Mail(from); err != nil { return fmt.Errorf("Mail: %v", err) } for _, rec := range to { if err = client.Rcpt(rec); err != nil { return fmt.Errorf("Rcpt: %v", err) } } w, err := client.Data() if err != nil { return fmt.Errorf("Data: %v", err) } else if _, err = msg.WriteTo(w); err != nil { return fmt.Errorf("WriteTo: %v", err) } else if err = w.Close(); err != nil { return fmt.Errorf("Close: %v", err) } return client.Quit() } // Sender sendmail mail sender type sendmailSender struct { } // Send send email func (s *sendmailSender) Send(from string, to []string, msg io.WriterTo) error { var err error var closeError error var waitError error args := []string{"-f", from, "-i"} args = append(args, setting.MailService.SendmailArgs...) args = append(args, to...) log.Trace("Sending with: %s %v", setting.MailService.SendmailPath, args) pm := process.GetManager() desc := fmt.Sprintf("SendMail: %s %v", setting.MailService.SendmailPath, args) ctx, cancel := context.WithTimeout(graceful.GetManager().HammerContext(), setting.MailService.SendmailTimeout) defer cancel() cmd := exec.CommandContext(ctx, setting.MailService.SendmailPath, args...) pipe, err := cmd.StdinPipe() if err != nil { return err } if err = cmd.Start(); err != nil { return err } pid := pm.Add(desc, cancel) _, err = msg.WriteTo(pipe) // we MUST close the pipe or sendmail will hang waiting for more of the message // Also we should wait on our sendmail command even if something fails closeError = pipe.Close() waitError = cmd.Wait() pm.Remove(pid) if err != nil { return err } else if closeError != nil { return closeError } else { return waitError } } // Sender sendmail mail sender type dummySender struct { } // Send send email func (s *dummySender) Send(from string, to []string, msg io.WriterTo) error { buf := bytes.Buffer{} if _, err := msg.WriteTo(&buf); err != nil { return err } log.Info("Mail From: %s To: %v Body: %s", from, to, buf.String()) return nil } var mailQueue queue.Queue // Sender sender for sending mail synchronously var Sender gomail.Sender // NewContext start mail queue service func NewContext() { // Need to check if mailQueue is nil because in during reinstall (user had installed // before but swithed install lock off), this function will be called again // while mail queue is already processing tasks, and produces a race condition. if setting.MailService == nil || mailQueue != nil { return } switch setting.MailService.MailerType { case "smtp": Sender = &smtpSender{} case "sendmail": Sender = &sendmailSender{} case "dummy": Sender = &dummySender{} } mailQueue = queue.CreateQueue("mail", func(data ...queue.Data) { for _, datum := range data { msg := datum.(*Message) gomailMsg := msg.ToMessage() log.Trace("New e-mail sending request %s: %s", gomailMsg.GetHeader("To"), msg.Info) if err := gomail.Send(Sender, gomailMsg); err != nil { log.Error("Failed to send emails %s: %s - %v", gomailMsg.GetHeader("To"), msg.Info, err) } else { log.Trace("E-mails sent %s: %s", gomailMsg.GetHeader("To"), msg.Info) } } }, &Message{}) go graceful.GetManager().RunWithShutdownFns(mailQueue.Run) } // SendAsync send mail asynchronously func SendAsync(msg *Message) { SendAsyncs([]*Message{msg}) } // SendAsyncs send mails asynchronously func SendAsyncs(msgs []*Message) { if setting.MailService == nil { log.Error("Mailer: SendAsyncs is being invoked but mail service hasn't been initialized") return } go func() { for _, msg := range msgs { _ = mailQueue.Push(msg) } }() }