// Send send message through the client
func Send(c *smtp.Client, message *Message) (err error) {
data, err := message.RenderData()
if err != nil {
return
}
if err = c.Reset(); err != nil {
return
}
if err = c.Mail(message.From); err != nil {
return
}
if err = addRcpt(c, message.To); err != nil {
return
}
if err = addRcpt(c, message.Cc); err != nil {
return
}
if err = addRcpt(c, message.Bcc); err != nil {
return
}
w, err := c.Data()
if err != nil {
return
}
defer w.Close()
_, err = w.Write(data)
return
}
// Receive message and deliver them to their recipients. Due to the complicated
// algorithm for message delivery, the body of the method is broken up into a
// sequence of labeled sections.
func (h *Host) run() {
defer close(h.stop)
var (
m *Message
hostname string
c *smtp.Client
err error
tries int
duration = time.Minute
)
receive:
if m == nil {
m = h.receiveMessage()
if m == nil {
goto shutdown
}
h.log.Info("message received in queue")
}
hostname, err = h.parseHostname(m.From)
if err != nil {
h.log.Error(err.Error())
goto cleanup
}
deliver:
if c == nil {
h.log.Debug("connecting to mail server")
c, err = h.connectToMailServer(hostname)
if c == nil {
if err != nil {
h.log.Error(err)
goto wait
} else {
goto shutdown
}
}
h.log.Debug("connection established")
}
err = h.deliverToMailServer(c, m)
if err != nil {
h.log.Error(err)
if _, ok := err.(syscall.Errno); ok {
c = nil
goto deliver
}
if e, ok := err.(*textproto.Error); ok {
if e.Code >= 400 && e.Code <= 499 {
c.Close()
c = nil
goto wait
}
c.Reset()
}
h.log.Error(err.Error())
goto cleanup
}
h.log.Info("message delivered successfully")
cleanup:
h.log.Debug("deleting message from disk")
err = h.storage.DeleteMessage(m)
if err != nil {
h.log.Error(err.Error())
}
m = nil
tries = 0
goto receive
wait:
// We differ a tiny bit from the RFC spec here but this should work well
// enough - the goal is to retry lots of times early on and space out the
// remaining attempts as time goes on. (Roughly 48 hours total.)
switch {
case tries < 8:
duration *= 2
case tries < 18:
default:
h.log.Error("maximum retry count exceeded")
goto cleanup
}
select {
case <-h.stop:
case <-time.After(duration):
goto receive
}
tries++
shutdown:
h.log.Debug("shutting down")
if c != nil {
c.Close()
}
}
func (mailer *RecMailer) processOneRecord(id string, email string, w io.Writer, smtpClient *smtp.Client, httpClient *http.Client) int {
var (
recResponse RecResponse
)
fullUrl := fmt.Sprintf(mailer.Config.RecUrl, id)
resp, err := httpClient.Get(fullUrl)
if err != nil {
fmt.Fprintf(w, "Unable to get URL %s\n", fullUrl)
fmt.Println(err)
resp.Body.Close()
return 1
}
readBytes, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
fmt.Fprintf(w, "Unable to read from URL %s\n", fullUrl)
return 1
}
err = json.Unmarshal(readBytes, &recResponse)
if err != nil {
fmt.Fprintf(w, "Unable to parse JSON http resp for user %s\n", id)
fmt.Println(err)
return 1
}
if len(recResponse.Suggestions) == 0 {
fmt.Fprintf(w, "No recommendations for user %s\n", id)
return 1
}
// If there's no thumbnail, use a blank gif
for recIndex := 0; recIndex < len(recResponse.Suggestions); recIndex++ {
if len(recResponse.Suggestions[recIndex].Thumbnail.Url) == 0 {
recResponse.Suggestions[recIndex].Thumbnail.Url = "http://graphics8.nytimes.com/images/misc/spacer.gif"
}
}
//emails := make([]string, 1)
//emails[0] = email
localTime := time.Now()
dateStr := localTime.Format(time.RFC1123Z)
edata := new(EmailData)
edata.FromAddress = mailer.Config.EnvelopeFrom
edata.ToAddress = email
edata.Subject = "Recommendations for you"
edata.RecResponse = recResponse
edata.Date = dateStr
edata.HumanDate = fmt.Sprintf("%s %d, %d", localTime.Month(),
localTime.Day(), localTime.Year())
buff := new(bytes.Buffer)
mailer.Template.Execute(buff, edata)
//err = smtp.SendMail(mailer.Config.SmtpServer, nil, mailer.Config.SmtpFrom, emails, buff.Bytes())
errReset := smtpClient.Reset()
if errReset != nil {
fmt.Printf("There was an error sending for user %s\n", id)
fmt.Println(errReset)
return 1
}
errMail := smtpClient.Mail(mailer.Config.SmtpFrom)
if errMail != nil {
fmt.Printf("There was an error sending for user %s\n", id)
fmt.Println(errMail)
return 1
}
errRcpt := smtpClient.Rcpt(email)
if errRcpt != nil {
fmt.Printf("There was an error sending for user %s\n", id)
fmt.Println(errRcpt)
return 1
}
smtpWriter, errData := smtpClient.Data()
if errData != nil {
fmt.Printf("There was an error sending for user %s\n", id)
fmt.Println(errData)
return 1
}
smtpWriter.Write(buff.Bytes())
smtpWriter.Close()
/*
if err != nil {
fmt.Printf("There was an error sending for user %s\n", id)
fmt.Println(err)
return 1
}
*/
fmt.Fprintf(w, "Success for %s, %s\n", id, email)
return 0
}