Exemple #1
0
func ListenAndServer(host string, ns *notification.Sender) {
	notificationSender = ns
	l, err := net.Listen("tcp", host)
	if err != nil {
		log.Println("TcpSocket Error listening:", err.Error())
		os.Exit(1)
	}

	println("Starting tcp server...")

	defer l.Close()

	defer close(*events.GetNewVoteChan())
	defer close(*events.GetVoteUpdateChan())
	defer close(*events.GetNewSocketsChan())
	defer close(*events.GetClosedSocketsChan())

	go ListenToEvents()

	for {
		conn, err := l.Accept()
		if err != nil {
			log.Println("TcpSocket Error accepting: ", err.Error())
			os.Exit(1)
		}

		go HandleNewConnection(conn)
	}
}
func ListenToEvents() {
	clients := make([]*events.SomeSocket, 0, 1024)
	clientsCounter := 0
	for {
		select {
		case newVoteEvent := <-*events.GetNewVoteChan():
			for _, client := range clients {
				client.NewVoteEvent <- &newVoteEvent
			}
		case voteUpdateEvent := <-*events.GetVoteUpdateChan():
			for _, client := range clients {
				client.VoteUpdEvent <- &voteUpdateEvent
			}
		case newSocketEvent := <-*events.GetNewSocketsChan():
			clientsCounter++
			newSocketEvent.Socket.Id = strconv.Itoa(clientsCounter)
			clients = append(clients, newSocketEvent.Socket)
		case socketClosedEvent := <-*events.GetClosedSocketsChan():
			id := socketClosedEvent.Socket.Id
			index := 0
			for i, socket := range clients {
				if socket.Id == id {
					index = i
				}
			}

			clients = append(clients[:index], clients[index+1:]...)
		}
	}
}
func ListenAndServer(host string, ns *notification.Sender, dbconn string) {
	notificationSender = ns
	dbConnectionAddress = dbconn

	l, err := net.Listen("tcp", host)
	if err != nil {
		log.Error.Printf("TcpSocket Error listening: %s\n", err.Error())
		os.Exit(1)
	}

	defer l.Close()

	defer close(*events.GetNewVoteChan())
	defer close(*events.GetVoteUpdateChan())
	defer close(*events.GetNewSocketsChan())
	defer close(*events.GetClosedSocketsChan())

	go ListenToEvents()

	for {
		conn, err := l.Accept()
		if err != nil {
			log.Error.Printf("TcpSocket Error accepting: %s\n", err.Error())
			os.Exit(1)
		}

		go handleNewConnection(conn)
	}
}
func doVote(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
	funcPrefix := "Processing voting"
	log.Debug.Printf("%s: start\n", funcPrefix)
	defer log.Debug.Printf("%s: end\n", funcPrefix)
	log.Debug.Printf("%s: authenticating user...\n", funcPrefix)
	user, error := authenticate(r.Header.Get("auth_token"))
	if error != nil {
		log.Error.Printf("%s: user authentication failed\n", funcPrefix)
		w.WriteHeader(400)
		return
	}
	id := ps.ByName("id")

	log.Debug.Printf("%s: getting vote with id '%s' from storage...\n", funcPrefix, id)
	vote, err := storage.GetVote(id)
	if err != nil {
		log.Error.Printf("%s: getting vote with id '%s' from storage failed: %s\n", funcPrefix, id, err.Error())
		w.WriteHeader(400)
		return
	}

	var params DoVotePrm
	log.Debug.Printf("%s: decoding params...\n", funcPrefix)
	err = json.NewDecoder(r.Body).Decode(&params)
	if err != nil {
		log.Error.Printf("%s: decoding params failed: %s\n", funcPrefix, err.Error())
		w.WriteHeader(400)
		return
	}

	log.Debug.Printf("%s: modifying vote...\n", funcPrefix)
	storage.VoteProcessing(*vote, *user, params.Value)

	log.Debug.Printf("%s: getting vote result status...\n", funcPrefix)
	res := storage.GetVoteResultStatus(*vote, *user)

	log.Debug.Printf("%s: sending vote update event...\n", funcPrefix)
	*events.GetVoteUpdateChan() <- events.VoteUpdateEvent{res}

	log.Info.Printf("%s: vote '%s' has been succesfully updated!\n", funcPrefix, vote.Name)

	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
	w.Header().Set("Access-Control-Allow-Headers", "*")
	if json.NewEncoder(w).Encode(res) != nil {
		log.Error.Printf("%s: encoding response failed\n", funcPrefix)
		w.WriteHeader(500)
	}
}
func (s *TcpSocket) handleVoteFor(packet *PulsePacket) {
	funcPrefix := "Processing voting"
	log.Debug.Printf("%s: start\n", funcPrefix)
	defer log.Debug.Printf("%s: end\n", funcPrefix)

	storageConnection := storage.NewStorageConnection(dbConnectionAddress)
	defer storageConnection.CloseStorageConnection()

	var params CSVoteForRequest
	log.Debug.Printf("%s: unmarshaling params...\n", funcPrefix)
	err := json.Unmarshal(packet.content, &params)
	if err != nil {
		log.Error.Printf("%s: unmarshaling params failed: %s\n", funcPrefix, err.Error())
		return
	}

	log.Debug.Printf("%s: getting vote with id '%s' from storage...\n", funcPrefix, params.Id)
	vote, err := storageConnection.GetVote(params.Id)
	if err != nil {
		log.Error.Printf("%s: getting vote with id '%s' from storage failed: %s\n", funcPrefix, params.Id, err.Error())
		return
	}

	if storageConnection.IsVotedByUser(*vote, s.user) {
		log.Warning.Printf("%s: user has already voted!\n", funcPrefix)
		return
	}

	log.Debug.Printf("%s: modifying vote...\n", funcPrefix)
	storageConnection.VoteProcessing(*vote, s.user, params.ColorId)

	log.Debug.Printf("%s: getting vote result status...\n", funcPrefix)
	res, err1 := storageConnection.GetVoteResultStatus(*vote, s.user, storageConnection.UsersCount())
	if err1 != nil {
		log.Error.Printf("%s: getting vote result status failed: %s\n", funcPrefix, err.Error())
		return
	}

	log.Debug.Printf("%s: sending vote update event...\n", funcPrefix)
	*events.GetVoteUpdateChan() <- events.VoteUpdateEvent{res}

	log.Info.Printf("%s: vote '%s' has been succesfully updated!\n", funcPrefix, vote.Name)
}
func (s *TcpSocket) handleVoteFor(packet *PulsePucket) {
	var params CSVoteForRequest
	err := json.Unmarshal(packet.content, &params)
	if err != nil {
		fmt.Println(err)
		return
	}

	vote, err := storage.GetVote(params.Id)
	if err != nil {
		fmt.Println(err)
		return
	}

	storage.VoteProcessing(*vote, s.user, params.ColorId)

	res := storage.GetVoteResultStatus(*vote, s.user)

	*events.GetVoteUpdateChan() <- events.VoteUpdateEvent{res}
}
func ListenToEvents() {
	funcPrefix := "Processing socket managing events"
	log.Debug.Printf("%s: start\n", funcPrefix)
	defer log.Debug.Printf("%s: end\n", funcPrefix)

	clients := make([]*events.SomeSocket, 0, 1024)
	clientsCounter := 0
	for {
		select {
		case newVoteEvent := <-*events.GetNewVoteChan():
			log.Debug.Printf("%s: handling vote create event\n", funcPrefix)
			for _, client := range clients {
				client.NewVoteEvent <- &newVoteEvent
			}
		case voteUpdateEvent := <-*events.GetVoteUpdateChan():
			log.Debug.Printf("%s: handling vote update event\n", funcPrefix)
			for _, client := range clients {
				client.VoteUpdEvent <- &voteUpdateEvent
			}
		case newSocketEvent := <-*events.GetNewSocketsChan():
			log.Debug.Printf("%s: handling socket connection create event\n", funcPrefix)
			clientsCounter++
			newSocketEvent.Socket.Id = strconv.Itoa(clientsCounter)
			clients = append(clients, newSocketEvent.Socket)
		case socketClosedEvent := <-*events.GetClosedSocketsChan():
			log.Debug.Printf("%s: handling socket connection close event\n", funcPrefix)
			id := socketClosedEvent.Socket.Id
			index := 0
			for i, socket := range clients {
				if socket.Id == id {
					index = i
				}
			}
			clients = append(clients[:index], clients[index+1:]...)
		}
	}
}