Refactor send command
This commit is contained in:
Reto Brunner
parent
7b12f2d1ea
commit
67923707ff
1 changed files with 315 additions and 212 deletions
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@ -1,6 +1,7 @@
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package compose
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import (
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"bytes"
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"crypto/tls"
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"fmt"
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"io"
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@ -42,6 +43,7 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
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return errors.New("Usage: send")
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}
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composer, _ := aerc.SelectedTab().(*widgets.Composer)
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tabName := aerc.TabNames()[aerc.SelectedTabIndex()]
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config := composer.Config()
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if config.Outgoing == "" {
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@ -49,28 +51,6 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
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"No outgoing mail transport configured for this account")
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}
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aerc.Logger().Println("Sending mail")
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uri, err := url.Parse(config.Outgoing)
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if err != nil {
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return errors.Wrap(err, "url.Parse(outgoing)")
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}
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var (
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scheme string
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auth string = "plain"
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)
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if uri.Scheme != "" {
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parts := strings.Split(uri.Scheme, "+")
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if len(parts) == 1 {
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scheme = parts[0]
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} else if len(parts) == 2 {
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scheme = parts[0]
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auth = parts[1]
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} else {
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return fmt.Errorf("Unknown transfer protocol %s", uri.Scheme)
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}
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}
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header, err := composer.PrepareHeader()
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if err != nil {
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return errors.Wrap(err, "PrepareHeader")
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@ -83,15 +63,187 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
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if config.From == "" {
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return errors.New("No 'From' configured for this account")
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}
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// TODO: the user could conceivably want to use a different From and sender
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from, err := mail.ParseAddress(config.From)
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if err != nil {
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return errors.Wrap(err, "ParseAddress(config.From)")
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}
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var (
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saslClient sasl.Client
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conn *smtp.Client
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)
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uri, err := url.Parse(config.Outgoing)
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if err != nil {
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return errors.Wrap(err, "url.Parse(outgoing)")
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}
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scheme, auth, err := parseScheme(uri)
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if err != nil {
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return err
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}
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var starttls bool
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if starttls_, ok := config.Params["smtp-starttls"]; ok {
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starttls = starttls_ == "yes"
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}
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ctx := sendCtx{
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uri: uri,
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scheme: scheme,
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auth: auth,
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starttls: starttls,
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from: from,
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rcpts: rcpts,
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}
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var sender io.WriteCloser
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switch ctx.scheme {
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case "smtp":
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fallthrough
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case "smtps":
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sender, err = newSmtpSender(ctx)
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case "":
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sender, err = newSendmailSender(ctx)
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default:
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sender, err = nil, fmt.Errorf("unsupported scheme %v", ctx.scheme)
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}
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if err != nil {
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return errors.Wrap(err, "send:")
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}
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// if we copy via the worker we need to know the count
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counter := datacounter.NewWriterCounter(sender)
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var writer io.Writer = counter
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writer = counter
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var copyBuf bytes.Buffer
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if config.CopyTo != "" {
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writer = io.MultiWriter(writer, ©Buf)
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}
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aerc.RemoveTab(composer)
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aerc.PushStatus("Sending...", 10*time.Second)
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ch := make(chan error)
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go func() {
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err := composer.WriteMessage(header, writer)
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if err != nil {
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ch <- err
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return
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}
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ch <- sender.Close()
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}()
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// we don't want to block the UI thread while we are sending
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go func() {
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err = <-ch
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if err != nil {
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aerc.PushError(err.Error())
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aerc.NewTab(composer, tabName)
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return
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}
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if config.CopyTo != "" {
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aerc.PushStatus("Copying to "+config.CopyTo, 10*time.Second)
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errCh := copyToSent(composer.Worker(), config.CopyTo,
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int(counter.Count()), ©Buf)
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err = <-errCh
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if err != nil {
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errmsg := fmt.Sprintf(
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"message sent, but copying to %v failed: %v",
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config.CopyTo, err.Error())
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aerc.PushError(errmsg)
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composer.SetSent()
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composer.Close()
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return
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}
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}
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aerc.PushStatus("Message sent.", 10*time.Second)
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composer.SetSent()
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composer.Close()
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}()
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return nil
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}
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func listRecipients(h *mail.Header) ([]*mail.Address, error) {
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var rcpts []*mail.Address
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for _, key := range []string{"to", "cc", "bcc"} {
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list, err := h.AddressList(key)
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if err != nil {
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return nil, err
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}
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rcpts = append(rcpts, list...)
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}
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return rcpts, nil
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}
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type sendCtx struct {
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uri *url.URL
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scheme string
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auth string
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starttls bool
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from *mail.Address
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rcpts []*mail.Address
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}
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func newSendmailSender(ctx sendCtx) (io.WriteCloser, error) {
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args, err := shlex.Split(ctx.uri.Path)
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if err != nil {
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return nil, err
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}
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if len(args) == 0 {
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return nil, fmt.Errorf("no command specified")
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}
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bin := args[0]
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rs := make([]string, len(ctx.rcpts), len(ctx.rcpts))
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for i := range ctx.rcpts {
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rs[i] = ctx.rcpts[i].Address
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}
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args = append(args[1:], rs...)
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cmd := exec.Command(bin, args...)
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s := &sendmailSender{cmd: cmd}
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s.stdin, err = s.cmd.StdinPipe()
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if err != nil {
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return nil, errors.Wrap(err, "cmd.StdinPipe")
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}
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err = s.cmd.Start()
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if err != nil {
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return nil, errors.Wrap(err, "cmd.Start")
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}
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return s, nil
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}
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type sendmailSender struct {
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cmd *exec.Cmd
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stdin io.WriteCloser
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}
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func (s *sendmailSender) Write(p []byte) (int, error) {
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return s.stdin.Write(p)
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}
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func (s *sendmailSender) Close() error {
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se := s.stdin.Close()
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ce := s.cmd.Wait()
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if se != nil {
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return se
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}
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return ce
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}
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func parseScheme(uri *url.URL) (scheme string, auth string, err error) {
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scheme = ""
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auth = "plain"
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if uri.Scheme != "" {
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parts := strings.Split(uri.Scheme, "+")
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if len(parts) == 1 {
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scheme = parts[0]
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} else if len(parts) == 2 {
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scheme = parts[0]
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auth = parts[1]
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} else {
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return "", "", fmt.Errorf("Unknown transfer protocol %s", uri.Scheme)
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}
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}
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return scheme, auth, nil
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}
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func newSaslClient(auth string, uri *url.URL) (sasl.Client, error) {
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var saslClient sasl.Client
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switch auth {
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case "":
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fallthrough
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@ -105,7 +257,6 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
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saslClient = sasl.NewPlainClient("", uri.User.Username(), password)
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case "oauthbearer":
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q := uri.Query()
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oauth2 := &oauth2.Config{}
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if q.Get("token_endpoint") != "" {
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oauth2.ClientID = q.Get("client_id")
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@ -113,212 +264,164 @@ func (Send) Execute(aerc *widgets.Aerc, args []string) error {
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oauth2.Scopes = []string{q.Get("scope")}
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oauth2.Endpoint.TokenURL = q.Get("token_endpoint")
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}
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password, _ := uri.User.Password()
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bearer := lib.OAuthBearer{
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OAuth2: oauth2,
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Enabled: true,
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}
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if bearer.OAuth2.Endpoint.TokenURL == "" {
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return fmt.Errorf("No 'TokenURL' configured for this account")
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return nil, fmt.Errorf("No 'TokenURL' configured for this account")
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}
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token, err := bearer.ExchangeRefreshToken(password)
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if err != nil {
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return err
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return nil, err
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}
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password = token.AccessToken
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saslClient = sasl.NewOAuthBearerClient(&sasl.OAuthBearerOptions{
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Username: uri.User.Username(),
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Token: password,
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})
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default:
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return fmt.Errorf("Unsupported auth mechanism %s", auth)
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return nil, fmt.Errorf("Unsupported auth mechanism %s", auth)
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}
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aerc.RemoveTab(composer)
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var starttls bool
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if starttls_, ok := config.Params["smtp-starttls"]; ok {
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starttls = starttls_ == "yes"
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}
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smtpAsync := func() (int, error) {
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switch scheme {
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case "smtp":
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host := uri.Host
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serverName := uri.Host
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if !strings.ContainsRune(host, ':') {
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host = host + ":587" // Default to submission port
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} else {
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serverName = host[:strings.IndexRune(host, ':')]
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}
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conn, err = smtp.Dial(host)
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if err != nil {
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return 0, errors.Wrap(err, "smtp.Dial")
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}
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defer conn.Close()
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if sup, _ := conn.Extension("STARTTLS"); sup {
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if !starttls {
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err := errors.New("STARTTLS is supported by this server, " +
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"but not set in accounts.conf. " +
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"Add smtp-starttls=yes")
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return 0, err
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}
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if err = conn.StartTLS(&tls.Config{
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ServerName: serverName,
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}); err != nil {
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return 0, errors.Wrap(err, "StartTLS")
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}
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} else {
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if starttls {
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err := errors.New("STARTTLS requested, but not supported " +
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"by this SMTP server. Is someone tampering with your " +
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"connection?")
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return 0, err
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}
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}
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case "smtps":
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host := uri.Host
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serverName := uri.Host
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if !strings.ContainsRune(host, ':') {
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host = host + ":465" // Default to smtps port
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} else {
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serverName = host[:strings.IndexRune(host, ':')]
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}
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conn, err = smtp.DialTLS(host, &tls.Config{
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ServerName: serverName,
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})
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if err != nil {
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return 0, errors.Wrap(err, "smtp.DialTLS")
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}
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defer conn.Close()
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}
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if saslClient != nil {
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if err = conn.Auth(saslClient); err != nil {
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return 0, errors.Wrap(err, "conn.Auth")
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}
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}
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// TODO: the user could conceivably want to use a different From and sender
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if err = conn.Mail(from.Address, nil); err != nil {
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return 0, errors.Wrap(err, "conn.Mail")
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}
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aerc.Logger().Printf("rcpt to: %v", rcpts)
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for _, rcpt := range rcpts {
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if err = conn.Rcpt(rcpt); err != nil {
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return 0, errors.Wrap(err, "conn.Rcpt")
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}
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}
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wc, err := conn.Data()
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if err != nil {
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return 0, errors.Wrap(err, "conn.Data")
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}
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defer wc.Close()
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ctr := datacounter.NewWriterCounter(wc)
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composer.WriteMessage(header, ctr)
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return int(ctr.Count()), nil
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}
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sendmailAsync := func() (int, error) {
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args, err := shlex.Split(uri.Path)
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if err != nil {
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return 0, err
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}
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if len(args) == 0 {
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return 0, fmt.Errorf("no command specified")
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}
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bin := args[0]
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args = append(args[1:], rcpts...)
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cmd := exec.Command(bin, args...)
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wc, err := cmd.StdinPipe()
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if err != nil {
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return 0, errors.Wrap(err, "cmd.StdinPipe")
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}
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err = cmd.Start()
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if err != nil {
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return 0, errors.Wrap(err, "cmd.Start")
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}
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ctr := datacounter.NewWriterCounter(wc)
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composer.WriteMessage(header, ctr)
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wc.Close() // force close to make sendmail send
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err = cmd.Wait()
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if err != nil {
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return 0, errors.Wrap(err, "cmd.Wait")
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}
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return int(ctr.Count()), nil
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}
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sendAsync := func() (int, error) {
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fmt.Println(scheme)
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switch scheme {
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case "smtp":
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fallthrough
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case "smtps":
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return smtpAsync()
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case "":
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return sendmailAsync()
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}
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return 0, errors.New("Unknown scheme")
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}
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go func() {
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aerc.PushStatus("Sending...", 10*time.Second)
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nbytes, err := sendAsync()
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if err != nil {
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aerc.PushError(" " + err.Error())
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return
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}
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if config.CopyTo != "" {
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aerc.PushStatus("Copying to "+config.CopyTo, 10*time.Second)
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worker := composer.Worker()
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r, w := io.Pipe()
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worker.PostAction(&types.AppendMessage{
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Destination: config.CopyTo,
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Flags: []models.Flag{models.SeenFlag},
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Date: time.Now(),
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Reader: r,
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Length: nbytes,
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}, func(msg types.WorkerMessage) {
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switch msg := msg.(type) {
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case *types.Done:
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aerc.PushStatus("Message sent.", 10*time.Second)
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r.Close()
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composer.SetSent()
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composer.Close()
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case *types.Error:
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aerc.PushError(" " + msg.Error.Error())
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r.Close()
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composer.Close()
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}
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})
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header, err := composer.PrepareHeader()
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if err != nil {
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aerc.PushError(" " + err.Error())
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w.Close()
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return
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}
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composer.WriteMessage(header, w)
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w.Close()
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} else {
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aerc.PushStatus("Message sent.", 10*time.Second)
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composer.SetSent()
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composer.Close()
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}
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}()
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return nil
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return saslClient, nil
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}
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func listRecipients(h *mail.Header) ([]string, error) {
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var rcpts []string
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for _, key := range []string{"to", "cc", "bcc"} {
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list, err := h.AddressList(key)
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if err != nil {
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type smtpSender struct {
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ctx sendCtx
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conn *smtp.Client
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w io.WriteCloser
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}
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func (s *smtpSender) Write(p []byte) (int, error) {
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return s.w.Write(p)
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}
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func (s *smtpSender) Close() error {
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we := s.w.Close()
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ce := s.conn.Close()
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if we != nil {
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return we
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}
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return ce
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}
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func newSmtpSender(ctx sendCtx) (io.WriteCloser, error) {
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var (
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err error
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conn *smtp.Client
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)
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switch ctx.scheme {
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case "smtp":
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conn, err = connectSmtp(ctx.starttls, ctx.uri.Host)
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case "smtps":
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conn, err = connectSmtps(ctx.uri.Host)
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default:
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return nil, fmt.Errorf("not an smtp protocol %s", ctx.scheme)
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}
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saslclient, err := newSaslClient(ctx.auth, ctx.uri)
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if err != nil {
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conn.Close()
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return nil, err
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}
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if saslclient != nil {
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if err := conn.Auth(saslclient); err != nil {
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conn.Close()
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return nil, errors.Wrap(err, "conn.Auth")
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}
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}
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s := &smtpSender{
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ctx: ctx,
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conn: conn,
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}
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if err := s.conn.Mail(s.ctx.from.Address, nil); err != nil {
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conn.Close()
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return nil, errors.Wrap(err, "conn.Mail")
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}
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for _, rcpt := range s.ctx.rcpts {
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if err := s.conn.Rcpt(rcpt.Address); err != nil {
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conn.Close()
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||||
return nil, errors.Wrap(err, "conn.Rcpt")
|
||||
}
|
||||
}
|
||||
s.w, err = s.conn.Data()
|
||||
if err != nil {
|
||||
conn.Close()
|
||||
return nil, errors.Wrap(err, "conn.Data")
|
||||
}
|
||||
return s.w, nil
|
||||
}
|
||||
|
||||
func connectSmtp(starttls bool, host string) (*smtp.Client, error) {
|
||||
serverName := host
|
||||
if !strings.ContainsRune(host, ':') {
|
||||
host = host + ":587" // Default to submission port
|
||||
} else {
|
||||
serverName = host[:strings.IndexRune(host, ':')]
|
||||
}
|
||||
conn, err := smtp.Dial(host)
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "smtp.Dial")
|
||||
}
|
||||
if sup, _ := conn.Extension("STARTTLS"); sup {
|
||||
if !starttls {
|
||||
err := errors.New("STARTTLS is supported by this server, " +
|
||||
"but not set in accounts.conf. " +
|
||||
"Add smtp-starttls=yes")
|
||||
conn.Close()
|
||||
return nil, err
|
||||
}
|
||||
for _, addr := range list {
|
||||
rcpts = append(rcpts, addr.Address)
|
||||
if err = conn.StartTLS(&tls.Config{
|
||||
ServerName: serverName,
|
||||
}); err != nil {
|
||||
conn.Close()
|
||||
return nil, errors.Wrap(err, "StartTLS")
|
||||
}
|
||||
} else {
|
||||
if starttls {
|
||||
err := errors.New("STARTTLS requested, but not supported " +
|
||||
"by this SMTP server. Is someone tampering with your " +
|
||||
"connection?")
|
||||
conn.Close()
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return rcpts, nil
|
||||
return conn, nil
|
||||
}
|
||||
|
||||
func connectSmtps(host string) (*smtp.Client, error) {
|
||||
serverName := host
|
||||
if !strings.ContainsRune(host, ':') {
|
||||
host = host + ":465" // Default to smtps port
|
||||
} else {
|
||||
serverName = host[:strings.IndexRune(host, ':')]
|
||||
}
|
||||
conn, err := smtp.DialTLS(host, &tls.Config{
|
||||
ServerName: serverName,
|
||||
})
|
||||
if err != nil {
|
||||
return nil, errors.Wrap(err, "smtp.DialTLS")
|
||||
}
|
||||
return conn, nil
|
||||
}
|
||||
|
||||
func copyToSent(worker *types.Worker, dest string,
|
||||
n int, msg io.Reader) <-chan error {
|
||||
errCh := make(chan error)
|
||||
worker.PostAction(&types.AppendMessage{
|
||||
Destination: dest,
|
||||
Flags: []models.Flag{models.SeenFlag},
|
||||
Date: time.Now(),
|
||||
Reader: msg,
|
||||
Length: n,
|
||||
}, func(msg types.WorkerMessage) {
|
||||
switch msg := msg.(type) {
|
||||
case *types.Done:
|
||||
errCh <- nil
|
||||
case *types.Error:
|
||||
errCh <- msg.Error
|
||||
}
|
||||
})
|
||||
return errCh
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue