upload.go

package main

import (
	"io"
	"io/ioutil"
	"net/http"
	"path"
)

// uploaderHandler expects two fields to be posted, userid and avatarFile.
func uploaderHandler(w http.ResponseWriter, req * http.Request) {
	userId := req.FormValue("userid")
	file, header, err := req.FormFile("avatarFile")
	if err != nil {
		io.WriteString(w, err.Error())
		return
	}

	data, err := ioutil.ReadAll(file)
	if err != nil {
		io.WriteString(w, err.Error())
		return
	}

	filename := path.Join("avatars", userId+path.Ext(header.Filename))
	err = ioutil.WriteFile(filename, data, 0777)
	if err != nil {
		io.WriteString(w, err.Error())
		return
	}
	io.WriteString(w, "Successful")
}