Parsing Template

Go Template - Parsing Template.txt

import (
	"html/template"
	"log"
	"net/http"
	"os"
)

type AllData struct {
		Nations   []AttributeNationData
}

func main() {
	port := os.Getenv("PORT")
	if port == "" {
		log.Fatal("$PORT must be set")
	}
	http.HandleFunc("/world", templateWorldHandler)
	log.Println("running in port :", port)
	http.ListenAndServe(":"+port, nil)
}

// handling template call
func templateWorldHandler(w http.ResponseWriter, r *http.Request) {
        var data AllData
        data.Nations = getWorldCoronaData()
	t := template.Must(template.ParseFiles("templates/index-world.html"))
	t.Execute(w, data)
}

// fetch data
func getWorldCoronaData() (result []AttributeNationData) {
	req, err := http.NewRequest("GET", dataURLNation, nil)
	if err != nil {
		log.Println("NewRequest: ", err)
		return
	}
	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		log.Println("Do: ", err)
		return
	}
	defer resp.Body.Close()
	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
		log.Println("NewDecoder", err)
	}
	return
}