multipart upload golang

viduploadtest.go

package main

import (
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"os"
)

//This is where the action happens.
func uploadHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Access-Control-Allow-Origin", "*")

	switch r.Method {

	//POST takes the uploaded file(s) and saves it to disk.
	case "POST":
		fmt.Printf("Upload request.")
		//parse the multipart form in the request
		err := r.ParseMultipartForm(100000)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		//get a ref to the parsed multipart form
		m := r.MultipartForm

		//get the *fileheaders
		fmt.Printf("map %+v\n", m.File)
		createFiles(w, m.File["video[]"])
		createFiles(w, m.File["thumb[]"])
		//display success message.
		fmt.Printf("Upload successful.")
	default:
		w.WriteHeader(http.StatusMethodNotAllowed)
	}
}

func main() {
	http.HandleFunc("/upload", uploadHandler)
	fs := http.FileServer(http.Dir("."))
	http.Handle("/", http.StripPrefix("/", fs))
	fmt.Printf("started")
	//Listen on port 8080
	http.ListenAndServe(":8080", nil)
}

func createFiles(w http.ResponseWriter, files []*multipart.FileHeader) {
	for i, _ := range files {
		//for each fileheader, get a handle to the actual file
		file, err := files[i].Open()
		defer file.Close()
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		//create destination file making sure the path is writeable.
		fmt.Printf("creating %v\n", files[i].Filename)
		dst, err := os.Create("/home/ggalizzi/web_development/trabajo/vidpost/uploadtest/" + files[i].Filename)
		defer dst.Close()
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
		//copy the uploaded file to the destination file
		if _, err := io.Copy(dst, file); err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

	}
}