add new file go/l19/l1.go for service post

.gitignore

@@ -1,2 +1,3 @@
 .vscode
 .env
+.idea

go/l17.go

@@ -1,16 +1,17 @@
 package main
 
 import (
-	"log"
-	"github.com/joho/godotenv"
-	"os"
-	"strings"
-	"net/http"
-	"time"
 	"encoding/json"
-	mqtt "github.com/eclipse/paho.mqtt.golang"
 	"fmt"
+	"log"
+	"net/http"
+	"os"
 	"strconv"
+	"strings"
+	"time"
+
+	mqtt "github.com/eclipse/paho.mqtt.golang"
+	"github.com/joho/godotenv"
 )
 
 type OpenWeather struct {
@@ -44,8 +45,8 @@ func WeatherReq() (string, float64, string, float64, float64, string) {
 	client := &http.Client{
 		Timeout: 20 * time.Second,
 	}
-	link := "https://api.openweathermap.org/data/2.5/weather?q=" + city + "&units=metric&appid=" + api
+	lin := "https://api.openweathermap.org/data/2.5/weather?q=" + city + "&units=metric&appid=" + api
-	url := strings.ReplaceAll(link, " ", "%20")
+	url := strings.ReplaceAll(lin, " ", "%20")
 	req, err := http.NewRequest("GET", url, nil)
 	if err != nil {
 		log.Fatalf("%v\n", err)
@@ -83,17 +84,29 @@ func main() {
 	opts := mqtt.NewClientOptions()
 
 	err := godotenv.Load()
-	if err != nil { log.Fatalf("%v\n", err) }
+	if err != nil {
+		log.Fatalf("%v\n", err)
+	}
 	broker := os.Getenv("broker_mqtt")
-	if broker == "" { log.Fatalf("add yout broker in .env file\n") }
+	if broker == "" {
+		log.Fatalf("add yout broker in .env file\n")
+	}
 	ClientID := os.Getenv("clientid_mqtt")
-	if ClientID == "" { log.Fatalf("add your client id in .env file") }
+	if ClientID == "" {
+		log.Fatalf("add your client id in .env file")
+	}
 	topic := os.Getenv("topic_mqtt")
-	if topic == "" { log.Fatalf("add your topic in .env file") }
+	if topic == "" {
+		log.Fatalf("add your topic in .env file")
+	}
 	username := os.Getenv("login_mqtt")
-	if username != "" { opts.SetUsername(username) }
+	if username != "" {
+		opts.SetUsername(username)
+	}
 	password := os.Getenv("password_mqtt")
-	if password != "" { opts.SetPassword(password) }
+	if password != "" {
+		opts.SetPassword(password)
+	}
 	TimeHour := os.Getenv("TimeHourSendMQTT")
 
 	opts.AddBroker(broker)
@@ -101,14 +114,18 @@ func main() {
 	opts.SetConnectTimeout(5 * time.Second)
 
 	client := mqtt.NewClient(opts)
-	if token := client.Connect(); token.Wait() && token.Error() != nil { log.Fatalf("%v\n", token.Error()) }
+	if token := client.Connect(); token.Wait() && token.Error() != nil {
+		log.Fatalf("%v\n", token.Error())
+	}
 	defer client.Disconnect(250)
 
 	fmt.Println("Connect to a broker")
 	var ticker *time.Ticker
 	if TimeHour != "" {
 		ReallyTimeHour, err := strconv.Atoi(TimeHour)
-		if err != nil { log.Fatalf("%s\n", err) }
+		if err != nil {
+			log.Fatalf("%s\n", err)
+		}
 		ticker = time.NewTicker(time.Duration(ReallyTimeHour) * time.Hour)
 	} else {
 		ticker = time.NewTicker(2 * time.Hour)

go/l19/.gitignore

@@ -0,0 +1,4 @@
+.env
+.*.*.swp
+.idea
+.vscode

go/l19/l1.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"encoding/json"
+)
+
+type User struct{
+	Age int `json:"age"`
+	Name string `json:"name"`
+	Email string `json:"email"`
+}
+
+var setChan = make(chan User)
+
+func handle(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "not",  http.StatusMethodNotAllowed)
+		return
+	}
+
+	var data User
+	err := json.NewDecoder(r.Body).Decode(&data)
+	if err != nil {
+		http.Error(w,"no", http.StatusBadRequest)
+		return
+	}
+	defer r.Body.Close()
+	
+	setChan <- data
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte("Data received"))
+}
+
+func WatchChanell() {
+	for u := range setChan {
+		JsonData, err := json.Marshal(u)
+		if err != nil { continue }
+		fmt.Println(string(JsonData))
+	}
+}
+
+func main() {
+	go WatchChanell()
+	http.HandleFunc("/user", handle)
+	fmt.Println(":7777")
+	err := http.ListenAndServe(":7777", nil)
+	if err != nil {
+		panic(err)
+	}
+}

go/output/go_build_my_app

@@ -0,0 +1 @@
+ELF