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Philipp Heckel
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "github.com/emersion/go-smtp" | ||
| "io" | ||
| "io/ioutil" | ||
| "log" | ||
| "net/mail" | ||
| "strings" | ||
| "sync" | ||
| ) | ||
|
|
||
| // smtpBackend implements SMTP server methods. | ||
| type smtpBackend struct { | ||
| config *Config | ||
| sub subscriber | ||
| } | ||
|
|
||
| func newMailBackend(conf *Config, sub subscriber) *smtpBackend { | ||
| return &smtpBackend{ | ||
| config: conf, | ||
| sub: sub, | ||
| } | ||
| } | ||
|
|
||
| func (b *smtpBackend) Login(state *smtp.ConnectionState, username, password string) (smtp.Session, error) { | ||
| return &smtpSession{config: b.config, sub: b.sub}, nil | ||
| } | ||
|
|
||
| func (b *smtpBackend) AnonymousLogin(state *smtp.ConnectionState) (smtp.Session, error) { | ||
| return &smtpSession{config: b.config, sub: b.sub}, nil | ||
| } | ||
|
|
||
| // smtpSession is returned after EHLO. | ||
| type smtpSession struct { | ||
| config *Config | ||
| sub subscriber | ||
| from, to string | ||
| mu sync.Mutex | ||
| } | ||
|
|
||
| func (s *smtpSession) AuthPlain(username, password string) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (s *smtpSession) Mail(from string, opts smtp.MailOptions) error { | ||
| s.mu.Lock() | ||
| defer s.mu.Unlock() | ||
| s.from = from | ||
| return nil | ||
| } | ||
|
|
||
| func (s *smtpSession) Rcpt(to string) error { | ||
| s.mu.Lock() | ||
| defer s.mu.Unlock() | ||
| addressList, err := mail.ParseAddressList(to) | ||
| if err != nil { | ||
| return err | ||
| } else if len(addressList) != 1 { | ||
| return errors.New("only one recipient supported") | ||
| } else if !strings.HasSuffix(addressList[0].Address, "@"+s.config.SMTPServerDomain) { | ||
| return errors.New("invalid domain") | ||
| } else if s.config.SMTPServerAddrPrefix != "" && !strings.HasPrefix(addressList[0].Address, s.config.SMTPServerAddrPrefix) { | ||
| return errors.New("invalid address") | ||
| } | ||
| // FIXME check topic format | ||
| s.to = addressList[0].Address | ||
| return nil | ||
| } | ||
|
|
||
| func (s *smtpSession) Data(r io.Reader) error { | ||
| s.mu.Lock() | ||
| defer s.mu.Unlock() | ||
| b, err := ioutil.ReadAll(r) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| log.Println("Data:", string(b)) | ||
| msg, err := mail.ReadMessage(bytes.NewReader(b)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| body, err := io.ReadAll(msg.Body) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| topic := strings.TrimSuffix(s.to, "@"+s.config.SMTPServerDomain) | ||
| m := newDefaultMessage(topic, string(body)) | ||
| subject := msg.Header.Get("Subject") | ||
| if subject != "" { | ||
| m.Title = subject | ||
| } | ||
| return s.sub(m) | ||
| } | ||
|
|
||
| func (s *smtpSession) Reset() { | ||
| s.mu.Lock() | ||
| s.from = "" | ||
| s.to = "" | ||
| s.mu.Unlock() | ||
| } | ||
|
|
||
| func (s *smtpSession) Logout() error { | ||
| return nil | ||
| } |