mirror of
https://github.com/wneessen/go-mail.git
synced 2024-11-22 13:50:49 +01:00
Winni Neessen
78df991399
Did a complete overhaul of the senderror.go.
- the list of `errors.New()` has been replaced with constant itoa error reasons as `SendErrReason`. Instead, the `Error()` method now reports the corresponding error message based on the reason.
- The `SendError` received a `Is()` method so that we can use `errors.Is()` for very specific error checking. I.e. we can check for `&SendErrors{Reason: ErrSMTPMailFrom, isTemp: true}`. This provides much more flexibility in the error checking capabilities
- A `isTemp` field has been added to the `SendError` type, indicating whether the received error is temporary and can be retried or not. Accordingly, the `*Msg` now has a `SendErrorIsTemp()` method indicating the same. The decision is based on the first 3 characters returned from the SMTP server. If the error code is within the 4xx range, the error is seen as temporary
- A test for the SendError type has been added
113 lines
3.2 KiB
Go
113 lines
3.2 KiB
Go
// SPDX-FileCopyrightText: 2022 Winni Neessen <winni@neessen.dev>
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//
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// SPDX-License-Identifier: MIT
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//go:build !go1.20
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// +build !go1.20
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package mail
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import (
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"fmt"
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)
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// Send sends out the mail message
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func (c *Client) Send(ml ...*Msg) error {
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var errs []error
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if err := c.checkConn(); err != nil {
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return fmt.Errorf("failed to send mail: %w", err)
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}
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for _, m := range ml {
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m.sendError = nil
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if m.encoding == NoEncoding {
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if ok, _ := c.sc.Extension("8BITMIME"); !ok {
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errs = append(errs, ErrServerNoUnencoded)
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m.sendError = &SendError{Reason: ErrNoUnencoded, isTemp: false}
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continue
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}
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}
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f, err := m.GetSender(false)
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if err != nil {
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errs = append(errs, err)
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m.sendError = &SendError{Reason: ErrGetSender, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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rl, err := m.GetRecipients()
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if err != nil {
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m.sendError = &SendError{Reason: ErrGetRcpts, errlist: []error{err}, isTemp: isTempError(err)}
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errs = append(errs, err)
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continue
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}
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if err := c.mail(f); err != nil {
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errs = append(errs, fmt.Errorf("sending MAIL FROM command failed: %w", err))
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m.sendError = &SendError{Reason: ErrSMTPMailFrom, errlist: []error{err}, isTemp: isTempError(err)}
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if reserr := c.sc.Reset(); reserr != nil {
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errs = append(errs, reserr)
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}
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continue
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}
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failed := false
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rse := &SendError{}
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rse.errlist = make([]error, 0)
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rse.rcpt = make([]string, 0)
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for _, r := range rl {
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if err := c.rcpt(r); err != nil {
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errs = append(errs, fmt.Errorf("sending RCPT TO command failed: %w", err))
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rse.Reason = ErrSMTPRcptTo
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rse.errlist = append(rse.errlist, err)
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rse.rcpt = append(rse.rcpt, r)
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rse.isTemp = isTempError(err)
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failed = true
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}
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}
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if failed {
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if reserr := c.sc.Reset(); reserr != nil {
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errs = append(errs, reserr)
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}
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m.sendError = rse
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continue
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}
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w, err := c.sc.Data()
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if err != nil {
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errs = append(errs, fmt.Errorf("sending DATA command failed: %w", err))
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m.sendError = &SendError{Reason: ErrSMTPData, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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_, err = m.WriteTo(w)
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if err != nil {
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errs = append(errs, fmt.Errorf("sending mail content failed: %w", err))
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m.sendError = &SendError{Reason: ErrWriteContent, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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if err := w.Close(); err != nil {
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errs = append(errs, fmt.Errorf("failed to close DATA writer: %w", err))
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m.sendError = &SendError{Reason: ErrSMTPDataClose, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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if err := c.Reset(); err != nil {
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errs = append(errs, fmt.Errorf("sending RSET command failed: %w", err))
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m.sendError = &SendError{Reason: ErrSMTPReset, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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if err := c.checkConn(); err != nil {
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errs = append(errs, fmt.Errorf("failed to check server connection: %w", err))
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m.sendError = &SendError{Reason: ErrConnCheck, errlist: []error{err}, isTemp: isTempError(err)}
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continue
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}
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}
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if len(errs) > 0 {
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errtxt := ""
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for i := range errs {
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errtxt += fmt.Sprintf("%s", errs[i])
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if i < len(errs) {
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errtxt += "\n"
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}
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}
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return fmt.Errorf("%s", errtxt)
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}
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return nil
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}
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