protolab/client/main.go

package main

import (
	"log"
	"net"
	"time"

	pb "gordenko.dev/dima/protolab/gen/service/v1"

	"gordenko.dev/dima/protolab/bin"
)

const (
	ServerAddr = "localhost:8080"
)

func main() {
	conn, err := net.Dial("tcp", ServerAddr)
	if err != nil {
		log.Fatalf("net.Dial: %v\n", err)
	}
	defer conn.Close()

	log.Println("connected to server")

	for {
		// PING
		pingReq := &pb.RequestWrapper{
			Payload: &pb.RequestWrapper_Ping{
				Ping: &pb.PingRequest{
					Timestamp: time.Now().Unix(),
				},
			},
		}

		err = bin.WriteMessage(conn, pingReq)
		if err != nil {
			log.Fatalf("send ping: %v", err)
		} else {
			log.Println("ping sent")
		}

		var pingResp pb.ResponseWrapper
		err = bin.ReadMessage(conn, &pingResp)
		if err != nil {
			log.Fatalf("read ping response: %v", err)
		}
		if resp := pingResp.GetPingResp(); resp != nil {
			log.Printf("pong received, server time: %s\n",
				time.Unix(resp.GetServerTimestamp(), 0).Format(time.RFC3339))
		}

		time.Sleep(3 * time.Second)
		// TELEMETRY
		telemetryReq := &pb.RequestWrapper{
			Payload: &pb.RequestWrapper_SendTelemetry{
				SendTelemetry: &pb.TelemetryData{
					DeviceId:     "device-123",
					Timestamp:    time.Now().Unix(),
					Temperature:  25,
					BatteryLevel: 70,
				},
			},
		}
		err = bin.WriteMessage(conn, telemetryReq)
		if err != nil {
			log.Fatalf("send telemetry: %v", err)
		} else {
			log.Println("telemetry sent")
		}

		var telemetryResp pb.ResponseWrapper
		err = bin.ReadMessage(conn, &telemetryResp)
		if err != nil {
			log.Fatalf("bin.ReadMessage: %v", err)
		}
		if resp := telemetryResp.GetTelemetryResp(); resp != nil {
			log.Printf("server response on TelemetryData: %s\n", resp.GetResultCode().String())
		}
		time.Sleep(3 * time.Second)
	}
}