Method Attach

email.go:256–276

Attach is used to attach content from an io.Reader to the email. Required parameters include an io.Reader, the desired filename for the attachment, and the Content-Type The function will return the created Attachment for reference, as well as nil for the error, if successful.

(r io.Reader, filename string, c string)

// Required parameters include an io.Reader, the desired filename for the attachment, and the Content-Type
// The function will return the created Attachment for reference, as well as nil for the error, if successful.
func (e *Email) Attach(r io.Reader, filename string, c string) (a *Attachment, err error) {
	var buffer bytes.Buffer
	if _, err = io.Copy(&buffer, r); err != nil {
		return
	}
	at := &Attachment{
		Filename: filename,
		Header:   textproto.MIMEHeader{},
		Content:  buffer.Bytes(),
	}
	if c != "" {
		at.Header.Set("Content-Type", c)
	} else {
		at.Header.Set("Content-Type", "application/octet-stream")
	}
	at.Header.Set("Content-Disposition", fmt.Sprintf("attachment;\r\n filename=\"%s\"", filename))
	at.Header.Set("Content-ID", fmt.Sprintf("<%s>", filename))
	at.Header.Set("Content-Transfer-Encoding", "base64")
	e.Attachments = append(e.Attachments, at)
	return at, nil
}

// AttachFile is used to attach content to the email.
// It attempts to open the file referenced by filename and, if successful, creates an Attachment.