func main() {
log.Printf("Connect to %s\n", serverAddress)
var client *pop3.Client
var dialErr error
if secure {
client, dialErr = pop3.DialTLS(serverAddress)
} else {
client, dialErr = pop3.Dial(serverAddress)
}
checkErr(dialErr)
authErr := client.Auth(username, password)
checkErr(authErr)
log.Println("Fetching mailbox stat")
cmdErr := PrintMailBoxStat(client)
checkErr(cmdErr)
log.Println("Downloading mails")
err := ScanMailbox(client)
checkErr(err)
log.Println("Finished to download all of mails")
}
func PrintMailBoxStat(client *pop3.Client) error {
mailCount, mailBoxSize, err := client.Stat()
if err != nil {
return err
}
fmt.Printf("Account:%s, MailCount:%d, MailBoxSize:%s\n", username, mailCount, fileutil.Humanize(uint64(mailBoxSize)))
return nil
}
func ScanMailbox(client *pop3.Client) error {
msgs, _, err := client.ListAll()
checkErr(err)
for i := offset; i < len(msgs); i++ {
err = CheckAndDownloadMailContent(client, msgs[i])
if err != nil {
log.Fatalf("Download mail failure, Err:%v, Mail:%d, ", err, msgs[i])
}
}
return nil
}
func CheckAndDownloadMailContent(client *pop3.Client, index int) (err error) {
filePath := filepath.Join(destination, strconv.Itoa(index))
if _, errFileStat := os.Stat(filePath); errFileStat != nil { // mail file not found
log.Printf("Downloading Mail:%d", index)
// THINK: check content integrity
var mailContent string
mailContent, err = client.Retr(index)
if err != nil {
return
}
//find newline at head of file
var lastNewline = 0
for i, b := range mailContent {
if b != '\n' {
lastNewline = i
break
}
}
rawMailContent := []byte(mailContent)[lastNewline:]
// it's safe to ignore parse error
fromAddress, _ := getFromAddress(rawMailContent)
if fromAddress == mailFrom {
log.Printf("Store mail content to file:%s", filePath)
err = ioutil.WriteFile(filePath, rawMailContent, 0644)
if err != nil {
return
}
}
}
return
}