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38347aa16f
* Add settings to allow different SMTP envelope from address Sometimes it may be advisable to hide or alias the from address on an SMTP mail envelope. This PR adds two new options to the mailer to allow setting of an overriding from address. Fix #17477 Signed-off-by: Andrew Thornton <art27@cantab.net>
367 lines
9.2 KiB
Go
367 lines
9.2 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package mailer
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import (
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"bytes"
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"context"
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"crypto/tls"
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"fmt"
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"io"
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"net"
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"net/smtp"
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"os"
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"os/exec"
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"strings"
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"time"
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"code.gitea.io/gitea/modules/base"
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"code.gitea.io/gitea/modules/graceful"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/process"
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"code.gitea.io/gitea/modules/queue"
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"code.gitea.io/gitea/modules/setting"
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"github.com/jaytaylor/html2text"
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"gopkg.in/gomail.v2"
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)
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// Message mail body and log info
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type Message struct {
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Info string // Message information for log purpose.
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FromAddress string
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FromDisplayName string
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To []string
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Subject string
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Date time.Time
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Body string
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Headers map[string][]string
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}
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// ToMessage converts a Message to gomail.Message
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func (m *Message) ToMessage() *gomail.Message {
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msg := gomail.NewMessage()
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msg.SetAddressHeader("From", m.FromAddress, m.FromDisplayName)
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msg.SetHeader("To", m.To...)
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for header := range m.Headers {
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msg.SetHeader(header, m.Headers[header]...)
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}
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if len(setting.MailService.SubjectPrefix) > 0 {
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msg.SetHeader("Subject", setting.MailService.SubjectPrefix+" "+m.Subject)
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} else {
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msg.SetHeader("Subject", m.Subject)
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}
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msg.SetDateHeader("Date", m.Date)
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msg.SetHeader("X-Auto-Response-Suppress", "All")
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plainBody, err := html2text.FromString(m.Body)
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if err != nil || setting.MailService.SendAsPlainText {
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if strings.Contains(base.TruncateString(m.Body, 100), "<html>") {
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log.Warn("Mail contains HTML but configured to send as plain text.")
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}
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msg.SetBody("text/plain", plainBody)
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} else {
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msg.SetBody("text/plain", plainBody)
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msg.AddAlternative("text/html", m.Body)
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}
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return msg
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}
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// SetHeader adds additional headers to a message
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func (m *Message) SetHeader(field string, value ...string) {
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m.Headers[field] = value
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}
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// NewMessageFrom creates new mail message object with custom From header.
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func NewMessageFrom(to []string, fromDisplayName, fromAddress, subject, body string) *Message {
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log.Trace("NewMessageFrom (body):\n%s", body)
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return &Message{
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FromAddress: fromAddress,
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FromDisplayName: fromDisplayName,
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To: to,
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Subject: subject,
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Date: time.Now(),
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Body: body,
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Headers: map[string][]string{},
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}
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}
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// NewMessage creates new mail message object with default From header.
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func NewMessage(to []string, subject, body string) *Message {
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return NewMessageFrom(to, setting.MailService.FromName, setting.MailService.FromEmail, subject, body)
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}
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type loginAuth struct {
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username, password string
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}
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// LoginAuth SMTP AUTH LOGIN Auth Handler
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func LoginAuth(username, password string) smtp.Auth {
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return &loginAuth{username, password}
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}
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// Start start SMTP login auth
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func (a *loginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {
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return "LOGIN", []byte{}, nil
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}
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// Next next step of SMTP login auth
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func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
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if more {
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switch string(fromServer) {
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case "Username:":
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return []byte(a.username), nil
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case "Password:":
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return []byte(a.password), nil
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default:
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return nil, fmt.Errorf("unknown fromServer: %s", string(fromServer))
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}
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}
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return nil, nil
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}
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// Sender SMTP mail sender
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type smtpSender struct {
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}
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// Send send email
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func (s *smtpSender) Send(from string, to []string, msg io.WriterTo) error {
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opts := setting.MailService
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host, port, err := net.SplitHostPort(opts.Host)
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if err != nil {
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return err
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}
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tlsconfig := &tls.Config{
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InsecureSkipVerify: opts.SkipVerify,
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ServerName: host,
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}
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if opts.UseCertificate {
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cert, err := tls.LoadX509KeyPair(opts.CertFile, opts.KeyFile)
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if err != nil {
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return err
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}
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tlsconfig.Certificates = []tls.Certificate{cert}
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}
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conn, err := net.Dial("tcp", net.JoinHostPort(host, port))
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if err != nil {
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return err
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}
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defer conn.Close()
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isSecureConn := opts.IsTLSEnabled || (strings.HasSuffix(port, "465"))
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// Start TLS directly if the port ends with 465 (SMTPS protocol)
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if isSecureConn {
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conn = tls.Client(conn, tlsconfig)
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}
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client, err := smtp.NewClient(conn, host)
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if err != nil {
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return fmt.Errorf("NewClient: %v", err)
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}
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if !opts.DisableHelo {
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hostname := opts.HeloHostname
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if len(hostname) == 0 {
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hostname, err = os.Hostname()
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if err != nil {
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return err
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}
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}
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if err = client.Hello(hostname); err != nil {
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return fmt.Errorf("Hello: %v", err)
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}
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}
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// If not using SMTPS, always use STARTTLS if available
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hasStartTLS, _ := client.Extension("STARTTLS")
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if !isSecureConn && hasStartTLS {
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if err = client.StartTLS(tlsconfig); err != nil {
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return fmt.Errorf("StartTLS: %v", err)
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}
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}
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canAuth, options := client.Extension("AUTH")
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if canAuth && len(opts.User) > 0 {
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var auth smtp.Auth
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if strings.Contains(options, "CRAM-MD5") {
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auth = smtp.CRAMMD5Auth(opts.User, opts.Passwd)
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} else if strings.Contains(options, "PLAIN") {
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auth = smtp.PlainAuth("", opts.User, opts.Passwd, host)
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} else if strings.Contains(options, "LOGIN") {
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// Patch for AUTH LOGIN
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auth = LoginAuth(opts.User, opts.Passwd)
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}
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if auth != nil {
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if err = client.Auth(auth); err != nil {
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return fmt.Errorf("Auth: %v", err)
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}
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}
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}
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if opts.OverrideEnvelopeFrom {
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if err = client.Mail(opts.EnvelopeFrom); err != nil {
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return fmt.Errorf("Mail: %v", err)
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}
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} else {
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if err = client.Mail(from); err != nil {
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return fmt.Errorf("Mail: %v", err)
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}
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}
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for _, rec := range to {
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if err = client.Rcpt(rec); err != nil {
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return fmt.Errorf("Rcpt: %v", err)
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}
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}
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w, err := client.Data()
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if err != nil {
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return fmt.Errorf("Data: %v", err)
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} else if _, err = msg.WriteTo(w); err != nil {
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return fmt.Errorf("WriteTo: %v", err)
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} else if err = w.Close(); err != nil {
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return fmt.Errorf("Close: %v", err)
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}
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return client.Quit()
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}
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// Sender sendmail mail sender
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type sendmailSender struct {
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}
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// Send send email
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func (s *sendmailSender) Send(from string, to []string, msg io.WriterTo) error {
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var err error
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var closeError error
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var waitError error
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envelopeFrom := from
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if setting.MailService.OverrideEnvelopeFrom {
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envelopeFrom = setting.MailService.EnvelopeFrom
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}
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args := []string{"-f", envelopeFrom, "-i"}
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args = append(args, setting.MailService.SendmailArgs...)
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args = append(args, to...)
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log.Trace("Sending with: %s %v", setting.MailService.SendmailPath, args)
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pm := process.GetManager()
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desc := fmt.Sprintf("SendMail: %s %v", setting.MailService.SendmailPath, args)
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ctx, cancel := context.WithTimeout(graceful.GetManager().HammerContext(), setting.MailService.SendmailTimeout)
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defer cancel()
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cmd := exec.CommandContext(ctx, setting.MailService.SendmailPath, args...)
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pipe, err := cmd.StdinPipe()
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if err != nil {
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return err
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}
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if err = cmd.Start(); err != nil {
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return err
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}
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pid := pm.Add(desc, cancel)
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_, err = msg.WriteTo(pipe)
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// we MUST close the pipe or sendmail will hang waiting for more of the message
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// Also we should wait on our sendmail command even if something fails
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closeError = pipe.Close()
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waitError = cmd.Wait()
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pm.Remove(pid)
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if err != nil {
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return err
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} else if closeError != nil {
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return closeError
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} else {
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return waitError
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}
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}
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// Sender sendmail mail sender
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type dummySender struct {
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}
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// Send send email
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func (s *dummySender) Send(from string, to []string, msg io.WriterTo) error {
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buf := bytes.Buffer{}
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if _, err := msg.WriteTo(&buf); err != nil {
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return err
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}
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log.Info("Mail From: %s To: %v Body: %s", from, to, buf.String())
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return nil
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}
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var mailQueue queue.Queue
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// Sender sender for sending mail synchronously
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var Sender gomail.Sender
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// NewContext start mail queue service
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func NewContext() {
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// Need to check if mailQueue is nil because in during reinstall (user had installed
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// before but switched install lock off), this function will be called again
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// while mail queue is already processing tasks, and produces a race condition.
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if setting.MailService == nil || mailQueue != nil {
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return
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}
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switch setting.MailService.MailerType {
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case "smtp":
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Sender = &smtpSender{}
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case "sendmail":
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Sender = &sendmailSender{}
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case "dummy":
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Sender = &dummySender{}
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}
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mailQueue = queue.CreateQueue("mail", func(data ...queue.Data) {
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for _, datum := range data {
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msg := datum.(*Message)
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gomailMsg := msg.ToMessage()
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log.Trace("New e-mail sending request %s: %s", gomailMsg.GetHeader("To"), msg.Info)
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if err := gomail.Send(Sender, gomailMsg); err != nil {
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log.Error("Failed to send emails %s: %s - %v", gomailMsg.GetHeader("To"), msg.Info, err)
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} else {
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log.Trace("E-mails sent %s: %s", gomailMsg.GetHeader("To"), msg.Info)
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}
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}
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}, &Message{})
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go graceful.GetManager().RunWithShutdownFns(mailQueue.Run)
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}
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// SendAsync send mail asynchronously
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func SendAsync(msg *Message) {
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SendAsyncs([]*Message{msg})
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}
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// SendAsyncs send mails asynchronously
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func SendAsyncs(msgs []*Message) {
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if setting.MailService == nil {
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log.Error("Mailer: SendAsyncs is being invoked but mail service hasn't been initialized")
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return
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}
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go func() {
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for _, msg := range msgs {
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_ = mailQueue.Push(msg)
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}
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}()
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}
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