using System;
using System.IO;
using System.Net;

namespace EC.Utils
{
	/// <summary>
	/// FTPHelper
	/// 版 本：V3.0.0
	/// 版 权：EasyCode
	/// 作 者：LXC
	/// </summary>
	public class FTPHelper
	{
		private FtpWebRequest _ftp;
		private readonly string _ftpUrl;
		private readonly string _userName;
		private readonly string _passWord;

		public FTPHelper(string ftpUrl, string userName, string passWord)
		{
			this._ftpUrl = ftpUrl;
			this._userName = userName;
			this._passWord = passWord;
			Connect();
		}

		private void Connect()
		{
			_ftp = (FtpWebRequest)WebRequest.Create(new Uri(this._ftpUrl));
			_ftp.UseBinary = true;
			_ftp.Credentials = new NetworkCredential(this._userName, this._passWord);
		}

		public bool UpLoad(string file)
		{
			FileInfo copyfile = new FileInfo(file);
			_ftp.Method = WebRequestMethods.Ftp.UploadFile;
			const int bufflength = 2048;
			byte[] buff = new byte[bufflength];
			FileStream upstream = copyfile.OpenRead();
			try
			{
				Stream ftpstream = _ftp.GetRequestStream();
				int readLength;
				while ((readLength = upstream.Read(buff, 0, bufflength)) > 0)
				{
					ftpstream.Write(buff, 0, readLength);
				}
				upstream.Close();
				ftpstream.Close();
				return true;
			}
			catch
			{
				return false;
			}
		}
	}
}