/// <summary>
/// 获取永久素材，图文素材和视频消息素材返回json，
/// 其他类型的素材消息，则响应的直接为素材的内容，开发者可以自行保存为文件。
/// </summary>
/// <param name="access_token">公众号access token</param>
/// <param name="media_id">要获取的素材的media_id</param>
/// <returns></returns>
public Stream GetMaterial(string access_token, string media_id)
{
string url = $"{Config.WxApi}cgi-bin/material/get_material?access_token={access_token}";
var obj = new
{
media_id
};
return(WxAPI.Stream(url, obj, Method.POST));
}
private Stream GetTempMaterial(string access_token, string media_id, string type)
{
string url = $"{Config.WxApi}cgi-bin/media/get";
if (type == "hdvoice")
{
url += "/jssdk";
}
url += $"?access_token={access_token}&media_id={media_id}";
Stream result = WxAPI.Stream(url, null, Method.GET);
return(result);
}