Пример #1
0
// ----------------------------------------------------------------------------
func main() {
	commands, appConfig, err := getConfig()
	if err != nil {
		log.Fatal(err)
	}

	bot, err := tgbotapi.NewBotAPI(appConfig.token)
	if err != nil {
		log.Fatal(err)
	}

	log.Printf("Authorized on bot account: @%s", bot.Self.UserName)

	tgbotConfig := tgbotapi.NewUpdate(0)
	tgbotConfig.Timeout = appConfig.botTimeout
	botUpdatesChan, err := bot.GetUpdatesChan(tgbotConfig)
	if err != nil {
		log.Fatal(err)
	}

	users := NewUsers(appConfig)
	messageSignal := make(chan BotMessage, MessagesQueueSize)
	vacuumTicker := time.Tick(SecondsForOldUsersBeforeVacuum * time.Second)
	saveToBDTicker := make(<-chan time.Time)
	exitSignal := make(chan struct{})
	systemExitSignal := make(chan os.Signal)
	signal.Notify(systemExitSignal, os.Interrupt, os.Kill)

	if appConfig.persistentUsers {
		saveToBDTicker = time.Tick(SecondsForAutoSaveUsersToDB * time.Second)
	}

	var cacheTTL *cache.MemoryTTL
	if appConfig.cache > 0 {
		cacheTTL = cache.NewMemoryWithTTL(time.Duration(appConfig.cache) * time.Second)
		cacheTTL.StartGC(time.Duration(appConfig.cache) * time.Second * 2)
	}

	// all /shell2telegram sub-commands handlers
	internalCommands := map[string]func(Ctx) string{
		"stat":              cmdShell2telegramStat,
		"ban":               cmdShell2telegramBan,
		"search":            cmdShell2telegramSearch,
		"desc":              cmdShell2telegramDesc,
		"rm":                cmdShell2telegramRm,
		"exit":              cmdShell2telegramExit,
		"version":           cmdShell2telegramVersion,
		"broadcast_to_root": cmdShell2telegramBroadcastToRoot,
		"message_to_user":   cmdShell2telegramMessageToUser,
	}

	doExit := false
	for !doExit {
		select {
		case telegramUpdate := <-botUpdatesChan:

			var messageCmd, messageArgs string
			allUserMessage := telegramUpdate.Message.Text
			if len(allUserMessage) > 0 && allUserMessage[0] == '/' {
				messageCmd, messageArgs = splitStringHalfBySpace(allUserMessage)
			} else {
				messageCmd, messageArgs = "/:plain_text", allUserMessage
			}

			allowPlainText := false
			if _, ok := commands["/:plain_text"]; ok {
				allowPlainText = true
			}

			replayMsg := ""

			if len(messageCmd) > 0 && (messageCmd != "/:plain_text" || allowPlainText) {

				users.AddNew(telegramUpdate.Message)
				userID := telegramUpdate.Message.From.ID
				allowExec := appConfig.allowAll || users.IsAuthorized(userID)

				ctx := Ctx{
					appConfig:     &appConfig,
					users:         &users,
					commands:      commands,
					userID:        userID,
					allowExec:     allowExec,
					messageCmd:    messageCmd,
					messageArgs:   messageArgs,
					messageSignal: messageSignal,
					chatID:        telegramUpdate.Message.Chat.ID,
					exitSignal:    exitSignal,
					cacheTTL:      cacheTTL,
				}

				switch {
				// commands .................................
				case !appConfig.isPublicBot && (messageCmd == "/auth" || messageCmd == "/authroot"):
					replayMsg = cmdAuth(ctx)

				case messageCmd == "/help":
					replayMsg = cmdHelp(ctx)

				case messageCmd == "/shell2telegram" && users.IsRoot(userID):
					messageSubCmd := ""
					messageSubCmd, messageArgs = splitStringHalfBySpace(messageArgs)
					ctx.messageArgs = messageArgs
					if cmdHandler, ok := internalCommands[messageSubCmd]; ok {
						replayMsg = cmdHandler(ctx)
					} else {
						replayMsg = "Sub-command not found"
					}

				case allowExec && (allowPlainText && messageCmd == "/:plain_text" || messageCmd[0] == '/'):
					cmdUser(ctx)

				} // switch for commands

				if appConfig.logCommands {
					log.Printf("%s: %s", users.String(userID), allUserMessage)
				}

				sendMessage(messageSignal, telegramUpdate.Message.Chat.ID, []byte(replayMsg), false)
			}

		case botMessage := <-messageSignal:
			switch {
			case botMessage.messageType == msgIsText && !stringIsEmpty(botMessage.message):
				messageConfig := tgbotapi.NewMessage(botMessage.chatID, botMessage.message)
				if botMessage.isMarkdown {
					messageConfig.ParseMode = tgbotapi.ModeMarkdown
				}
				_, err = bot.Send(messageConfig)
			case botMessage.messageType == msgIsPhoto && len(botMessage.photo) > 0:
				bytesPhoto := tgbotapi.FileBytes{Name: botMessage.fileName, Bytes: botMessage.photo}
				_, err = bot.Send(tgbotapi.NewPhotoUpload(botMessage.chatID, bytesPhoto))
			}

			if err != nil {
				log.Print("Bot send message error: ", err)
			}

		case <-saveToBDTicker:
			users.SaveToDB(appConfig.usersDB)

		case <-vacuumTicker:
			users.ClearOldUsers()

		case <-systemExitSignal:
			go func() {
				exitSignal <- struct{}{}
			}()

		case <-exitSignal:
			if appConfig.persistentUsers {
				users.needSaveDB = true
				users.SaveToDB(appConfig.usersDB)
			}
			doExit = true
		}
	}
}
Пример #2
0
// exec shell commands with text to STDIN
func execShell(shellCmd, input string, varsNames []string, userID, chatID int, userName, userDisplayName string, cacheTTL *cache.MemoryTTL) (result []byte) {
	cacheKey := shellCmd + "/" + input
	if cacheTTL != nil {
		cacheData, err := cacheTTL.Get(cacheKey)
		if err != cache.ErrNotFound && err != nil {
			log.Print(err)
		} else if err == nil {
			// cache hit
			return cacheData.([]byte)
		}
	}

	shell, params := "sh", []string{"-c", shellCmd}
	if runtime.GOOS == "windows" {
		shell, params = "cmd", []string{"/C", shellCmd}
	}
	osExecCommand := exec.Command(shell, params...)
	osExecCommand.Stderr = os.Stderr

	// copy variables from parent process
	for _, envRaw := range os.Environ() {
		osExecCommand.Env = append(osExecCommand.Env, envRaw)
	}

	if input != "" {
		if len(varsNames) > 0 {
			// set user input to shell vars
			arguments := regexp.MustCompile(`\s+`).Split(input, len(varsNames))
			for i, arg := range arguments {
				osExecCommand.Env = append(osExecCommand.Env, fmt.Sprintf("%s=%s", varsNames[i], arg))
			}
		} else {
			// write user input to STDIN
			stdin, err := osExecCommand.StdinPipe()
			if err == nil {
				io.WriteString(stdin, input)
				stdin.Close()
			} else {
				log.Print("get STDIN error: ", err)
			}
		}
	}

	// set S2T_* env vars
	s2tVariables := [...]struct{ name, value string }{
		{"S2T_LOGIN", userName},
		{"S2T_USERID", strconv.Itoa(userID)},
		{"S2T_USERNAME", userDisplayName},
		{"S2T_CHATID", strconv.Itoa(userID)},
	}
	for _, row := range s2tVariables {
		osExecCommand.Env = append(osExecCommand.Env, fmt.Sprintf("%s=%s", row.name, row.value))
	}

	shellOut, err := osExecCommand.Output()
	if err != nil {
		log.Print("exec error: ", err)
		result = []byte(fmt.Sprintf("exec error: %s", err))
	} else {
		result = shellOut
	}

	if cacheTTL != nil {
		err := cacheTTL.Set(cacheKey, result)
		if err != nil {
			log.Print(err)
		}
	}

	return result
}