Golang utils.AssertError函數代碼示例

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	inPort, err = utils.CreateInputPort("debug/crasher.in", *inputEndpoint, inCh)
	utils.AssertError(err)

	outPort, err = utils.CreateOutputPort("debug/crasher.out", *outputEndpoint, outCh)
	utils.AssertError(err)
}

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	intervalPort, err = utils.CreateInputPort("ticker.interval", *intervalEndpoint, nil)
	utils.AssertError(err)

	outPort, err = utils.CreateOutputPort("ticker.out", *outputEndpoint, outCh)
	utils.AssertError(err)
}

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	inPort, err = utils.CreateInputPort("", *inputEndpoint, nil)
	utils.AssertError(err)

	outPort, err = utils.CreateOutputPort("bonjour/discover.out", *outputEndpoint, outCh)
	utils.AssertError(err)
}

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	optionsPort, err = utils.CreateInputPort("tcp/server.options", *optionsEndpoint, nil)
	utils.AssertError(err)

	inPort, err = utils.CreateInputPort("tcp/server.in", *inputEndpoint, inCh)
	utils.AssertError(err)
}

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	inPort, err = utils.CreateInputPort("fs/watchdog.in", *inputEndpoint, nil)
	utils.AssertError(err)

	if *errorEndpoint != "" {
		errPort, err = utils.CreateOutputPort("fs/watchdog.err", *errorEndpoint, errCh)
		utils.AssertError(err)
	}
}

func openPorts() {
	context, err = zmq.NewContext()
	utils.AssertError(err)

	optionsPort, err = utils.CreateInputPort(context, *optionsEndpoint)
	utils.AssertError(err)

	inPort, err = utils.CreateInputPort(context, *inputEndpoint)
	utils.AssertError(err)
}

// openPorts create ZMQ sockets and start socket monitoring loops
func openPorts() {
	optionsPort, err = utils.CreateInputPort("influxdb/write.options", *optionsEndpoint, nil)
	utils.AssertError(err)

	inPort, err = utils.CreateInputPort("influxdb/write.in", *inputEndpoint, inCh)
	utils.AssertError(err)

	if *errorEndpoint != "" {
		errPort, err = utils.CreateOutputPort("influxdb/write.err", *errorEndpoint, errCh)
		utils.AssertError(err)
	}
}

func openPorts() {
	optsPort, err = utils.CreateInputPort("mqtt-property.options", *optionsEndpoint, nil)
	utils.AssertError(err)

	tmplPort, err = utils.CreateInputPort("mqtt-property.template", *templateEndpoint, nil)
	utils.AssertError(err)

	propPort, err = utils.CreateOutputPort("mqtt-property.property", *propertyEndpoint, outCh)
	utils.AssertError(err)

	if *errorEndpoint != "" {
		errPort, err = utils.CreateOutputPort("mqtt-property.err", *errorEndpoint, nil)
		utils.AssertError(err)
	}
}

// mainLoop initiates all ports and handles the traffic
func mainLoop() {
	service := NewService()

	openPorts()
	defer closePorts()

	go func() {
		outPort, err = utils.CreateOutputPort("tcp/server.out", *outputEndpoint, outCh)
		utils.AssertError(err)
		for data := range service.Output {
			outPort.SendMessage(runtime.NewOpenBracket())
			outPort.SendMessage(runtime.NewPacket(data[0]))
			outPort.SendMessage(runtime.NewPacket(data[1]))
			outPort.SendMessage(runtime.NewCloseBracket())
		}
	}()

	waitCh := make(chan bool)
	go func() {
		total := 0
		for {
			select {
			case v := <-inCh:
				if !v {
					log.Println("IN port is closed. Interrupting execution")
					exitCh <- syscall.SIGTERM
					break
				} else {
					total++
				}
			case v := <-outCh:
				if !v {
					log.Println("OUT port is closed. Interrupting execution")
					exitCh <- syscall.SIGTERM
					break
				} else {
					total++
				}
			}
			if total >= 2 && waitCh != nil {
				waitCh <- true
			}
		}
	}()

	log.Println("Waiting for port connections to establish... ")
	select {
	case <-waitCh:
		log.Println("Ports connected")
		waitCh = nil
	case <-time.Tick(30 * time.Second):
		log.Println("Timeout: port connections were not established within provided interval")
		exitCh <- syscall.SIGTERM
		return
	}

	// Wait for the configuration on the options port
	log.Println("Waiting for configuration...")
	var bindAddr string
	for {
		ip, err := optionsPort.RecvMessageBytes(0)
		if err != nil {
			log.Println("Error receiving IP:", err.Error())
			continue
		}
		if !runtime.IsValidIP(ip) || !runtime.IsPacket(ip) {
			continue
		}
		bindAddr = string(ip[1])
		break
	}
	optionsPort.Close()

	// Create binding address listener
	laddr, err := net.ResolveTCPAddr("tcp", bindAddr)
	if err != nil {
		log.Fatalln(err)
	}
	listener, err := net.ListenTCP("tcp", laddr)
	if err != nil {
		log.Fatalln(err)
	}
	log.Println("Listening on", listener.Addr())

	go service.Serve(listener)

	log.Println("Started...")
	var (
		connID string
		data   []byte
	)
	for {
		ip, err := inPort.RecvMessageBytes(0)
		if err != nil {
			log.Println("Error receiving message:", err.Error())
			continue
		}
		if !runtime.IsValidIP(ip) {
			continue
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
	var (
		ip            [][]byte
		clientOptions *httputils.HTTPClientOptions
		request       *http.Request
	)

	log.Println("Started")

	for {
		ip, err = reqPort.RecvMessageBytes(zmq.DONTWAIT)
		if err != nil {
			select {
			case <-reqExitCh:
				log.Println("REQ port is closed. Interrupting execution")
				exitCh <- syscall.SIGTERM
				break
			default:
				// IN port is still open
			}
			time.Sleep(2 * time.Second)
			continue
		}
		if !runtime.IsValidIP(ip) {
			log.Println("Invalid IP:", ip)
			continue
		}

		err = json.Unmarshal(ip[1], &clientOptions)
		if err != nil {
			log.Println("ERROR: failed to unmarshal request options:", err.Error())
			continue
		}
		if clientOptions == nil {
			log.Println("ERROR: received nil request options")
			continue
		}

		if clientOptions.Form != nil {
			request, err = http.NewRequest(clientOptions.Method, clientOptions.URL, strings.NewReader(clientOptions.Form.Encode()))
		} else {
			request, err = http.NewRequest(clientOptions.Method, clientOptions.URL, nil)
		}
		utils.AssertError(err)

		if clientOptions.ContentType != "" {
			request.Header.Add("Content-Type", clientOptions.ContentType)
		}

		for k, v := range clientOptions.Headers {
			request.Header.Add(k, v[0])
		}

		response, err := client.Do(request)
		if err != nil {
			log.Printf("ERROR performing HTTP %s %s: %s", request.Method, request.URL, err.Error())
			if errPort != nil {
				errPort.SendMessageDontwait(runtime.NewPacket([]byte(err.Error())))
			}
			clientOptions = nil
			continue
		}
		resp, err := httputils.Response2Response(response)
		if err != nil {
			log.Printf("ERROR converting response to reply: %s", err.Error())
			if errPort != nil {
				errPort.SendMessageDontwait(runtime.NewPacket([]byte(err.Error())))
			}
			clientOptions = nil
			continue
		}
		ip, err = httputils.Response2IP(resp)
		if err != nil {
			log.Printf("ERROR converting reply to IP: %s", err.Error())
			if errPort != nil {
				errPort.SendMessageDontwait(runtime.NewPacket([]byte(err.Error())))
			}
			clientOptions = nil
			continue
		}

		if respPort != nil {
			respPort.SendMessage(ip)
		}
		if bodyPort != nil {
			bodyPort.SendMessage(runtime.NewPacket(resp.Body))
		}

		select {
		case <-reqCh:
			log.Println("REQ port is closed. Interrupting execution")
			exitCh <- syscall.SIGTERM
			break
		default:
			// file port is still open
		}

		clientOptions = nil
		continue
	}
}

// mainLoop initiates all ports and handles the traffic
func mainLoop() {
	openPorts()
	defer closePorts()

	waitCh := make(chan bool)
	go func() {
		for {
			v := <-outCh
			if v && waitCh != nil {
				waitCh <- true
			}
			if !v {
				log.Println("OUT port is closed. Interrupting execution")
				exitCh <- syscall.SIGTERM
				break
			}
		}
	}()

	log.Println("Waiting for port connections to establish... ")
	select {
	case <-waitCh:
		log.Println("Output port connected")
		waitCh = nil
	case <-time.Tick(30 * time.Second):
		log.Println("Timeout: port connections were not established within provided interval")
		exitCh <- syscall.SIGTERM
		return
	}

	log.Println("Waiting for configuration IP...")
	var options *bonjour.ServiceRecord
	for {
		ip, err := inPort.RecvMessageBytes(0)
		if err != nil {
			continue
		}
		if !runtime.IsValidIP(ip) || !runtime.IsPacket(ip) {
			continue
		}
		if err = json.Unmarshal(ip[1], &options); err != nil {
			log.Println("Error decoding options:", err.Error())
			continue
		}
		inPort.Close()
		break
	}

	resolver, err = bonjour.NewResolver(nil)
	utils.AssertError(err)

	entries := make(chan *bonjour.ServiceEntry)
	err = resolver.Browse(options.Service, options.Domain, entries)
	utils.AssertError(err)

	log.Println("Started...")
	for e := range entries {
		data, err := json.Marshal(e)
		if err != nil {
			log.Println("Error encoding entry:", err.Error())
			continue
		}
		outPort.SendMessage(runtime.NewPacket(data))
	}

}

// mainLoop initiates all ports and handles the traffic
func mainLoop() {
	openPorts()
	defer closePorts()

	// Receiver routine
	go func() {
		inPort, err = utils.CreateInputPort("websocket/server.in", *inputEndpoint, inCh)
		utils.AssertError(err)
		defer inPort.Close()
		for {
			ip, err := inPort.RecvMessageBytes(0)
			if err != nil {
				continue
			}
			if !runtime.IsValidIP(ip) {
				continue
			}
			msg, err := wsutils.IP2Message(ip)
			if err != nil {
				log.Println("Failed to convert IP to Message:", err.Error())
				continue
			}
			log.Printf("Received response: %#v\n", msg)
			DefaultHub.Outgoing <- *msg
		}
	}()

	// Sender routine
	go func() {
		outPort, err = utils.CreateOutputPort("websocket/server.out", *outputEndpoint, outCh)
		utils.AssertError(err)
		defer outPort.Close()
		for msg := range DefaultHub.Incoming {
			log.Printf("Received data from connection: %#v\n", msg)
			ip, err := wsutils.Message2IP(&msg)
			if err != nil {
				log.Println("Failed to convert Message to IP:", err.Error())
				continue
			}
			outPort.SendMessageDontwait(ip)
		}
	}()

	waitCh := make(chan bool)
	go func() {
		total := 0
		for {
			select {
			case v := <-inCh:
				if !v {
					log.Println("IN port is closed. Interrupting execution")
					exitCh <- syscall.SIGTERM
					break
				} else {
					total++
				}
			case v := <-outCh:
				if !v {
					log.Println("OUT port is closed. Interrupting execution")
					exitCh <- syscall.SIGTERM
					break
				} else {
					total++
				}
			}
			if total >= 2 && waitCh != nil {
				waitCh <- true
			}
		}
	}()

	log.Println("Waiting for port connections to establish... ")
	select {
	case <-waitCh:
		log.Println("Ports connected")
		waitCh = nil
	case <-time.Tick(30 * time.Second):
		log.Println("Timeout: port connections were not established within provided interval")
		exitCh <- syscall.SIGTERM
		return
	}

	log.Println("Waiting for configuration...")
	var bindAddr string
	for {
		ip, err := optionsPort.RecvMessageBytes(0)
		if err != nil {
			continue
		}
		if !runtime.IsValidIP(ip) || !runtime.IsPacket(ip) {
			continue
		}
		bindAddr = string(ip[1])
		break
	}
	optionsPort.Close()

	// Configure & start websocket server
	http.Handle("/", websocket.Handler(WebHandler))
//.........這裏部分代碼省略.........

func main() {
	flag.Parse()

	if *jsonFlag {
		doc, _ := registryEntry.JSON()
		fmt.Println(string(doc))
		os.Exit(0)
	}

	log.SetFlags(0)
	if *debug {
		log.SetOutput(os.Stdout)
	} else {
		log.SetOutput(ioutil.Discard)
	}

	validateArgs()

	openPorts()
	defer closePorts()

	exitCh := utils.HandleInterruption()

	// Wait for the configuration on the options port
	var bindAddr string
	for {
		log.Println("Waiting for configuration...")
		ip, err := optionsPort.RecvMultipart(0)
		if err != nil {
			log.Println("Error receiving IP:", err.Error())
			continue
		}
		if !runtime.IsValidIP(ip) || !runtime.IsPacket(ip) {
			continue
		}
		bindAddr = string(ip[1])
		break
	}
	optionsPort.Close()

	// Data from http handler and data to http handler
	inCh := make(chan httputils.HTTPResponse)
	outCh := make(chan HandlerRequest)

	go func(ctx *zmq.Context, endpoint string) {
		outPort, err = utils.CreateOutputPort(context, endpoint)
		utils.AssertError(err)

		// Map of uuid to requests
		dataMap := make(map[string]chan httputils.HTTPResponse)

		// Start listening in/out channels
		for {
			select {
			case data := <-outCh:
				dataMap[data.Request.Id] = data.ResponseCh
				ip, _ := httputils.Request2IP(data.Request)
				outPort.SendMultipart(ip, 0)
			case resp := <-inCh:
				if respCh, ok := dataMap[resp.Id]; ok {
					log.Println("Resolved channel for response", resp.Id)
					respCh <- resp
					delete(dataMap, resp.Id)
					continue
				}
				log.Println("Didn't find request handler mapping for a given ID", resp.Id)
			}
		}
	}(context, *outputEndpoint)

	// Web server goroutine
	go func() {
		mux := http.NewServeMux()
		mux.HandleFunc("/", Handler(outCh))

		s := &http.Server{
			Handler:        mux,
			ReadTimeout:    10 * time.Second,
			WriteTimeout:   10 * time.Second,
			MaxHeaderBytes: 1 << 20,
		}

		ln, err := net.Listen("tcp", bindAddr)
		if err != nil {
			log.Println(err.Error())
			exitCh <- syscall.SIGTERM
			return
		}

		log.Printf("Starting listening %v", bindAddr)
		err = s.Serve(ln)
		if err != nil {
			log.Println(err.Error())
			exitCh <- syscall.SIGTERM
			return
		}
	}()

	// Process incoming message forever
	for {
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
			case intPort:
				interval, err = time.ParseDuration(string(ip[1]))
				log.Println("Interval specified:", interval)
			case reqPort:
				err = json.Unmarshal(ip[1], &request)
				if err != nil {
					log.Println("ERROR: failed to unmarshal request:", err.Error())
					continue
				}
				log.Println("Request specified:", request)
			case tmplPort:
				err = json.Unmarshal(ip[1], &propTemplate)
				if err != nil {
					log.Println("ERROR: failed to unmarshal template:", err.Error())
					continue
				}
				log.Printf("Template specified: %+v", propTemplate)

			default:
				log.Println("ERROR: IP from unhandled socket received!")
				continue
			}
		}
		if interval > 0 && request != nil && propTemplate != nil {
			log.Println("Component configured. Moving on...")
			break
		}
	}

	log.Println("Started...")
	ticker := time.NewTicker(interval)
	for _ = range ticker.C {
		httpRequest, err = http.NewRequest(request.Method, request.URL, nil)
		utils.AssertError(err)

		// Set the accepted Content-Type
		if request.ContentType != "" {
			httpRequest.Header.Add("Content-Type", request.ContentType)
		}

		// Set any additional headers if provided
		for k, v := range request.Headers {
			httpRequest.Header.Add(k, v[0])
		}

		response, err := client.Do(httpRequest)
		if err != nil {
			log.Printf("ERROR performing HTTP %s %s: %s\n", request.Method, request.URL, err.Error())
			if errPort != nil {
				errPort.SendMessageDontwait(runtime.NewPacket([]byte(err.Error())))
			}
			continue
		}

		resp, err := httputils.Response2Response(response)
		if err != nil {
			log.Println("ERROR converting response to reply:", err.Error())
			if errPort != nil {
				errPort.SendMessageDontwait(runtime.NewPacket([]byte(err.Error())))
			}
			continue
		}

		// Property output socket
		if propPort != nil {
			var data interface{}