using learun.util;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace learun.wechat
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.06
	/// 描 述：get文件请求
	/// </summary>
	public class HttpGetFileRequest : IHttpSend
	{
		/// <summary>
		///
		/// </summary>
		/// <param name="url"></param>
		/// <param name="path"></param>
		/// <returns></returns>
		public async Task<string> Send(string url, string path)
		{
			var (by, header) = await new HttpHelper().GetFile(url);

			if (header["Content-Type"].Contains("application/json"))
			{
				return Encoding.UTF8.GetString(by);
			}
			else
			{
				Regex regImg = new Regex("\"(?<fileName>.*)\"", RegexOptions.IgnoreCase);

				MatchCollection matches = regImg.Matches(header["Content-disposition"]);

				string fileName = matches[0].Groups["fileName"].Value;

				string filepath = path.TrimEnd('\\') + "\\" + fileName;

				System.IO.Stream so = new System.IO.FileStream(filepath, System.IO.FileMode.Create);

				so.Write(by, 0, by.Length);

				so.Close();
			}

			return header.ToJson();
		}
	}
}