gistfile1.go

package main

import (
	"fmt"
	"html/template"
	"io"
	"net/http"
	"os"
	"path/filepath"
)

var uploadalert string
var filetowrite string

func handler(w http.ResponseWriter, r *http.Request) {
	//title := "moodlights"
	t, _ := template.ParseFiles("templates/template.html")
	t.Execute(w, nil)

}

func statichandler(w http.ResponseWriter, r *http.Request) {
	http.ServeFile(w, r, r.URL.Path[1:])
}

func recieveHandler(w http.ResponseWriter, r *http.Request) {
	file, header, err := r.FormFile("file") // the FormFile function takes in the POST input id file
	defer file.Close()

	if err != nil {
		fmt.Fprintln(w, err)
		return
	}

	fmt.Println(filepath.Ext(header.Filename))

	if filepath.Ext(header.Filename) != ".lua" {
		uploadalert = "<div class=\"alert alert-danger\" role=\"alert\"><b>Oh snap!</b> File doesn't have .lua extension</div>"
		http.Redirect(w, r, "/upload", http.StatusFound)
		return
	}

	out, err := os.Create("uploaded/" + header.Filename)
	if err != nil {
		//fmt.Fprintf(w, "Unable to create file: %s", err.Error())

		errstring := err.Error()
		uploadalert = "<div class=\"alert alert-danger\" role=\"alert\"><b>Oh snap!</b> Unable to create file: " + errstring + "</div>"
		http.Redirect(w, r, "/upload", http.StatusFound)
		return
	}

	defer out.Close()

	// write the content from POST to the file
	_, err = io.Copy(out, file)
	if err != nil {
		//fmt.Fprintln(w, err)

		errstring := err.Error()
		uploadalert = "<div class=\"alert alert-danger\" role=\"alert\"><b>Oh snap!</b> " + errstring + "</div>"
		http.Redirect(w, r, "/upload", http.StatusFound)
		return
	}

	uploadalert = "<div class=\"alert alert-success\" role=\"alert\"><b>Well done!</b> File uploaded</div>"
	http.Redirect(w, r, "/upload", http.StatusFound)

	fmt.Println("Info:", "File uploaded successfully:", header.Filename)

	//fmt.Fprintf(w, "File uploaded successfully : ")
	//fmt.Fprintf(w, header.Filename)
}

func main() {

	http.HandleFunc("/", handler)
	http.HandleFunc("/static/", statichandler)
	http.HandleFunc("/templates", statichandler)
	httpListenAndServe(":8080", nil)
}