app.go

package main

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

	"github.com/Microsoft/ApplicationInsights-Go/appinsights"
)

type PageVars struct {
	Message  string
	Language string
}

func main() {
	client := appinsights.NewTelemetryClient(os.Getenv("APPINSIGHTS_INSTRUMENTATIONKEY"))
	request := appinsights.NewRequestTelemetry("GET", "https://myapp.azurewebsites.net/", 1, "Success")
	client.Track(request)
	http.Handle("/css/", http.StripPrefix("/css/", http.FileServer(http.Dir("css"))))
	http.Handle("/img/", http.StripPrefix("/img/", http.FileServer(http.Dir("img"))))
	http.Handle("/fonts/", http.StripPrefix("/fonts/", http.FileServer(http.Dir("fonts"))))
	http.HandleFunc("/", Home)
	log.Fatal(http.ListenAndServe(getPort(), nil))
}

// Increment function increments the entered value by 1
func Increment(x int) (result int) {
	return x + 1
}

func getPort() string {
	p := os.Getenv("HTTP_PLATFORM_PORT")
	if p != "" {
		return ":" + p
	}
	return ":80"
}

func render(w http.ResponseWriter, tmpl string, pageVars PageVars) {

	tmpl = fmt.Sprintf("views/%s", tmpl)
	t, err := template.ParseFiles(tmpl)

	if err != nil { // if there is an error
		log.Print("template parsing error: ", err) // log it
	}

	err = t.Execute(w, pageVars) //execute the template and pass in the variables to fill the gaps

	if err != nil { // if there is an error
		log.Print("template executing error: ", err) //log it
	}
}

func Home(w http.ResponseWriter, req *http.Request) {
	pageVars := PageVars{
		Message:  "Success!",
		Language: "Go Lang",
	}
	render(w, "index.html", pageVars)
}