/// <summary>
/// 1.从CDN下载版本信息列表
/// </summary>
/// <param name="_url">CDN地址</param>
/// <param name="_completed">可选：完成后回调</param>
/// <param name="_password">可选：版本文件的密码</param>
/// <param name="_validSeconds">可选：默认为1天的有效期，超过有效期，会从服务器下载新的版本信息</param>
/// <returns></returns>
static public URemoteVersionRequest DownloadVersionFile(string _url, Action <URemoteVersionRequest> _completed = null, string _password = null, float _validSeconds = 7200)
{
FileVersionUpdateInfo outInfo;
if (false == VersionFiles.TryGetValue(_url, out outInfo))
{
outInfo = new FileVersionUpdateInfo();
outInfo.State = EDownloadState.Fail;
VersionFiles.Add(_url, outInfo);
}
if (outInfo.State == EDownloadState.Success)
{
if ((DateTime.Now - outInfo.LastUpdate).TotalSeconds >= _validSeconds)
{
outInfo.State = EDownloadState.Fail;
}
else
{
_completed?.Invoke(outInfo.Request);
return(outInfo.Request);
}
}
if (outInfo.State == EDownloadState.Fail)
{
outInfo.State = EDownloadState.Downloading;
outInfo.Request = new URemoteVersionLoader(_url, (src) =>
{
if (string.IsNullOrEmpty(_password) == false)
{
return(UFile.RemKeystore(src, _password));
}
return(src);
},
(isOk) =>
{
if (outInfo.Request.IsSuccess)
{
outInfo.State = EDownloadState.Success;
outInfo.LastUpdate = DateTime.Now;
}
else
{
outInfo.State = EDownloadState.Fail;
}
outInfo.Completed?.Invoke(outInfo.Request);
outInfo.Completed = null;
});
outInfo.Completed = _completed;
}
else
{
outInfo.Completed += _completed;
}
return(outInfo.Request);
}