/// <summary>
/// 下载临时素材
/// </summary>
/// <param name="media_id">媒体文件ID</param>
/// <param name="config"></param>
/// <returns></returns>
public static async Task <Stream> Get(string media_id, ApiConfig config = null)
{
using (var s = await ApiHelper.GetStream($"https://api.weixin.qq.com/cgi-bin/media/get?$acac$&media_id={Uri.EscapeDataString(media_id)}", config).ConfigureAwait(false))
{
var ms = new MemoryStream();
await s.CopyToAsync(ms).ConfigureAwait(false);
//估计错误消息应该不会大于400字节
if (ms.Length < 400)
{
var buffer = ms.ToArray();
var text = Encoding.UTF8.GetString(buffer);
//如果是失败消息, 这里会抛出异常
ApiHelper.BuildVoid(text, config);
}
ms.Position = 0;
return(ms);
}
}
