public static string url;
    private IEnumerator ReadAddress()
    {
        string path = null;
#if UNITY_EDITOR
        path = "file://" + Application.streamingAssetsPath + "/IpAddress.txt";
#endif
#if !UNITY_EDITOR
        path = Application.streamingAssetsPath + "/IpAddress.txt";
#endif
        WWW www = new WWW(path);
        yield return www;
        if (www.isDone)
        {
            url = Encoding.UTF8.GetString(www.bytes);
            print("配置地址：" + url);
        }
    }

webgl平台的特殊性，无法直接file读取，只能通过www的形式读取，读取xml和json文件会有问题