package main

import (
	"fmt"
	"io"
	"net/http"
)

func HandleMultipartForm(writer http.ResponseWriter, request *http.Request) {
	fmt.Fprintf(writer, "Name: %v , City : %v \n", request.FormValue("name"), request.FormValue("city"))
	fmt.Fprintln(writer, "--------")

	file, header, err := request.FormFile("files")
	if err != nil {
		http.Error(writer, err.Error(), http.StatusInternalServerError)
		return
	}
	defer file.Close()
	fmt.Fprintf(writer, "File Name: %v, File Size: %v \n", header.Filename, header.Size)
	for k, v := range header.Header {
		fmt.Fprintf(writer, "Key: %v , Value: %v \n", k, v)
	}
	fmt.Fprintln(writer, "--------")
	io.Copy(writer, file)
}

func HandleMultipartForm2(writer http.ResponseWriter, request *http.Request) {
	request.ParseMultipartForm(10 * 1024 * 1024)
	fmt.Fprintf(writer, "Name: %v , City : %v \n", request.FormValue("name"), request.FormValue("city"))
	fmt.Fprintln(writer, "--------\n")

	for _, header := range request.MultipartForm.File["files"] {
		fmt.Fprintf(writer, "\n\n--------\nFile Name: %v, File Size: %v \n", header.Filename, header.Size)
		file, err := header.Open()
		if err != nil {
			http.Error(writer, err.Error(), http.StatusInternalServerError)
			return
		}
		defer file.Close()
		for k, v := range header.Header {
			fmt.Fprintf(writer, "Key: %v , Value: %v \n", k, v)
		}
		fmt.Fprintln(writer, "--------")
		io.Copy(writer, file)
	}

}

func init() {
	http.HandleFunc("/forms/upload", HandleMultipartForm2)
}