79 lines
1.6 KiB
Go
79 lines
1.6 KiB
Go
package mailer
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import (
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"bytes"
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"errors"
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"mime"
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"net/http"
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"os/exec"
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"strings"
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)
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var _ Mailer = (*Sendmail)(nil)
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// Sendmail implements [mailer.Mailer] interface and defines a mail
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// client that sends emails via the "sendmail" *nix command.
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//
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// This client is usually recommended only for development and testing.
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type Sendmail struct {
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}
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// Send implements `mailer.Mailer` interface.
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func (c *Sendmail) Send(m *Message) error {
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toAddresses := addressesToStrings(m.To, false)
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headers := make(http.Header)
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headers.Set("Subject", mime.QEncoding.Encode("utf-8", m.Subject))
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headers.Set("From", m.From.String())
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headers.Set("Content-Type", "text/html; charset=UTF-8")
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headers.Set("To", strings.Join(toAddresses, ","))
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cmdPath, err := findSendmailPath()
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if err != nil {
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return err
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}
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var buffer bytes.Buffer
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// write
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// ---
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if err := headers.Write(&buffer); err != nil {
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return err
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}
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if _, err := buffer.Write([]byte("\r\n")); err != nil {
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return err
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}
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if m.HTML != "" {
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if _, err := buffer.Write([]byte(m.HTML)); err != nil {
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return err
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}
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} else {
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if _, err := buffer.Write([]byte(m.Text)); err != nil {
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return err
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}
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}
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// ---
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sendmail := exec.Command(cmdPath, strings.Join(toAddresses, ","))
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sendmail.Stdin = &buffer
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return sendmail.Run()
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}
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func findSendmailPath() (string, error) {
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options := []string{
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"/usr/sbin/sendmail",
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"/usr/bin/sendmail",
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"sendmail",
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}
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for _, option := range options {
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path, err := exec.LookPath(option)
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if err == nil {
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return path, err
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}
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}
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return "", errors.New("Failed to locate a sendmail executable path.")
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}
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