/**
* クッキーを作成する
* @function
* @param {string} name クッキーの名前
* @param {string} value クッキーの値
* @param {string} domain 有効ドメイン
* @param {string} path 有効ディレクトリ
* @param {int} hour 有効期限（時間）
*/
func NewCookie(name string, value string, domain string, path string, hour int) *http.Cookie {
duration := time.Hour * time.Duration(hour)
now := time.Now()
expire := now.Add(duration)
cookie := new(http.Cookie)
cookie.Name = name
cookie.Value = value
cookie.Domain = domain
cookie.Path = path
cookie.Expires = expire
cookie.RawExpires = expire.Format(time.UnixDate)
cookie.MaxAge = 60 * 60 * hour
cookie.Secure = false
cookie.HttpOnly = true
cookie.Raw = fmt.Sprintf("%s=%s", cookie.Name, cookie.Value)
cookie.Unparsed = []string{cookie.Raw}
return cookie
}