Пример #1
0
// TestSMTP tests if can connect with the server and send some commands.
func TestSMTP(addr string, a smtp.Auth, hello string, timeout time.Duration, insecureSkipVerify bool) error {
	serverName := addr
	port := ""
	s := strings.SplitN(addr, ":", 2)
	if len(s) >= 2 {
		serverName = s[0]
		port = s[1]
	}

	if serverName == "" || port == "" {
		return e.New("addrs is invalid")
	}

	hosts, err := dns.LookupHostCache(serverName)
	if err != nil {
		return e.Forward(err)
	}
	if len(hosts) == 0 {
		return e.New("can't resolve the addr")
	}

	conn, err := net.DialTimeout("tcp", hosts[0]+":"+port, timeout)
	if err != nil {
		return e.Forward(err)
	}
	defer conn.Close()

	command := &Command{
		Timeout: timeout,
		Conn:    conn,
	}

	var c *smtp.Client
	r := command.Exec(smtp.NewClient, conn, serverName)
	r(&c, &err)
	if err != nil {
		return e.Forward(err)
	}
	defer c.Close()

	if hello != "" {
		r = command.Exec(c.Hello, hello)
		r(&err)
		if err != nil {
			return e.Forward(err)
		}
	}

	if ok, _ := c.Extension("STARTTLS"); ok {
		r = command.Exec(c.StartTLS, &tls.Config{
			ServerName:         serverName,
			InsecureSkipVerify: insecureSkipVerify,
		})
		r(&err)
		if err != nil {
			return e.Forward(err)
		}
	}

	if a != nil {
		found, _ := c.Extension("AUTH")
		if found {
			r = command.Exec(c.Auth, a)
			r(&err)
			if err != nil {
				return e.Forward(err)
			}
		}
	}

	r = command.Exec(c.Reset)
	r(&err)
	if err != nil {
		return e.New(err)
	}

	r = command.Exec(c.Quit)
	r(&err)
	if err != nil {
		return e.New(err)
	}

	return nil
}
Пример #2
0
// SendMail send a message to specific destination (to) using smtp server in addrs
// and a auth.
func SendMail(addr string, a smtp.Auth, from string, to []string, hello string, msg []byte, timeout time.Duration, insecureSkipVerify bool) error {
	serverName := addr
	port := ""
	serverName, port, err := net.SplitHostPort(addr)
	if err != nil {
		return e.Push(err, "invalid adderess")
	}

	if serverName == "" || port == "" {
		return e.New("addrs is invalid")
	}

	hosts, err := dns.LookupHostCache(serverName)
	if err != nil {
		return e.Forward(err)
	}
	if len(hosts) == 0 {
		return e.New("can't resolve the addr")
	}

	var conn net.Conn
	for _, host := range hosts {
		addr, err = utilNet.IpPort(host, port)
		if err != nil {
			err = e.Forward(err)
			continue
		}

		conn, err = net.DialTimeout("tcp", addr, timeout)
		if err != nil {
			err = e.Forward(err)
			continue
		}
	}
	if conn == nil {
		return err
	}

	command := &Command{
		Timeout: timeout,
		Conn:    conn,
	}

	var c *smtp.Client
	r := command.Exec(smtp.NewClient, conn, serverName)
	r(&c, &err)
	if err != nil {
		return e.Forward(err)
	}
	defer c.Close()

	if hello != "" {
		r = command.Exec(c.Hello, hello)
		r(&err)
		if err != nil {
			return e.Forward(err)
		}
	}

	if ok, _ := c.Extension("STARTTLS"); ok {
		r = command.Exec(c.StartTLS, &tls.Config{
			ServerName:         serverName,
			InsecureSkipVerify: insecureSkipVerify,
		})
		r(&err)
		if err != nil {
			return e.Forward(err)
		}
	}

	if a != nil {
		found, _ := c.Extension("AUTH")
		if found {
			r = command.Exec(c.Auth, a)
			r(&err)
			if err != nil {
				return e.Forward(err)
			}
		}
	}

	r = command.Exec(c.Mail, from)
	r(&err)
	if err != nil {
		return e.Forward(err)
	}

	for _, addr := range to {
		r = command.Exec(c.Rcpt, addr)
		r(&err)
		if err != nil {
			return e.New(err)
		}
	}

	var w io.WriteCloser
	r = command.ExecTimeout(0, c.Data)
	r(&w, &err)
	if err != nil {
		return e.New(err)
	}
	_, err = w.Write(msg)
	if err != nil {
		return e.New(err)
	}
	err = w.Close()
	if err != nil {
		return e.New(err)
	}

	r = command.Exec(c.Quit)
	r(&err)
	if err != nil {
		return e.New(err)
	}
	return nil
}