FTPサーバーに接続する

Question

FTPWebRequestを使用して小さなFTPクライアントを構築したいのですが、そこからユーザーを見せるためにヘッダー情報を接続して取得するための助けが必要なのですが、残りのアプリケーション。

Answer 1

ファイルがFTPサーバー上で使用可能である場合には、例えばチェックしたい、あなたはまた、 http://aspalliance.com/1187_Building_a_Simple_FTP_Application_Using_C_20.all

は、私はあなたにいくつかのアドバイスを与えることがあり、ここで見つけることができ.NETで簡単なFTPクライアントを構築する方法を

ニースの記事あなたはそのサイズをちょうどチェックするかもしれません。ここで

 public bool IsFtpFileExists(string remoteUri, out long remFileSize) 
     { 
      FtpWebRequest request = (FtpWebRequest)WebRequest.Create(BuildServerUri(remoteUri)); 
      FtpWebResponse response; 

      request.Method = WebRequestMethods.Ftp.GetFileSize; 
      request.Credentials = new NetworkCredential(Username, Password); 
      try 
      { 
       response = (FtpWebResponse)request.GetResponse(); 
       remFileSize = response.ContentLength; 
       return true; 
      } 
      catch (WebException we) 
      { 
       response = we.Response as FtpWebResponse; 
       if (response != null && response.StatusCode == FtpStatusCode.ActionNotTakenFileUnavailable) 
       { 
        remFileSize = 0; 
        return false; 
       } 
       throw; 
      } 
     } 

Answer 2

は、ディレクトリ情報を取得するためのサンプルです：ここでは

はその責任機能です。メソッドGetDirectoryInformationはコードサンプルの一番下にあります。これは、WindowsとUnixベースのFtpをカバーする必要があります。より完全なFTP Client code sample hereもあります。

class Ftp 
    { 

     public struct FileStruct 
     { 
      public string Flags; 
      public string Owner; 
      public string Group; 
      public bool IsDirectory; 
      public DateTime CreateTime; 
      public string Name; 
     } 

     public enum FileListStyle 
     { 
      UnixStyle, 
      WindowsStyle, 
      Unknown 
     } 

     private List<FileStruct> GetList(string datastring) 
     { 
      List<FileStruct> myListArray = new List<FileStruct>(); 
      string[] dataRecords = datastring.Split('\n'); 
      FileListStyle _directoryListStyle = GuessFileListStyle(dataRecords); 
      foreach (string s in dataRecords) 
      { 
       if (_directoryListStyle != FileListStyle.Unknown && s != "") 
       { 
        FileStruct f = new FileStruct(); 
        f.Name = ".."; 
        switch (_directoryListStyle) 
        { 
         case FileListStyle.UnixStyle: 
          f = ParseFileStructFromUnixStyleRecord(s); 
          break; 
         case FileListStyle.WindowsStyle: 
          f = ParseFileStructFromWindowsStyleRecord(s); 
          break; 
        } 
        if (!(f.Name == "." || f.Name == "..")) 
        { 
         myListArray.Add(f); 
        } 
       } 
      } 

      return myListArray; ; 
     } 

     private FileStruct ParseFileStructFromWindowsStyleRecord(string Record) 
     { 
      ///Assuming the record style as 
      /// 02-03-11 07:46PM  <DIR>   Append 
      FileStruct f = new FileStruct(); 
      string processstr = Record.Trim(); 
      string dateStr = processstr.Substring(0, 8); 
      processstr = (processstr.Substring(8, processstr.Length - 8)).Trim(); 
      string timeStr = processstr.Substring(0, 7); 
      processstr = (processstr.Substring(7, processstr.Length - 7)).Trim(); 
      f.CreateTime = DateTime.Parse(dateStr + " " + timeStr); 
      if (processstr.Substring(0, 5) == "<DIR>") 
      { 
       f.IsDirectory = true; 
       processstr = (processstr.Substring(5, processstr.Length - 5)).Trim(); 
      } 
      else 
      { 
       string[] strs = processstr.Split(new char[] { ' ' }); 
       processstr = strs[1].Trim(); 
       f.IsDirectory = false; 
      } 
      f.Name = processstr; //Rest is name 
      return f; 
     } 


     public FileListStyle GuessFileListStyle(string[] recordList) 
     { 
      foreach (string s in recordList) 
      { 
       if (s.Length > 10 && Regex.IsMatch(s.Substring(0, 10), "(-|d)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)(-|r)(-|w)(-|x)")) 
       { 
        return FileListStyle.UnixStyle; 
       } 

       if (s.Length > 8 && Regex.IsMatch(s.Substring(0, 8), "[0-9][0-9]-[0-9][0-9]-[0-9][0-9]")) 
       { 
        return FileListStyle.WindowsStyle; 
       } 
      } 
      return FileListStyle.Unknown; 
     } 

     private FileStruct ParseFileStructFromUnixStyleRecord(string record) 
     { 
      ///Assuming record style as 
      /// dr-xr-xr-x 1 owner group    0 Feb 25 2011 bussys 
      FileStruct f = new FileStruct(); 
      string processstr = record.Trim(); 

      f.Flags = processstr.Substring(0, 9); 
      f.IsDirectory = (f.Flags[0] == 'd'); 

      processstr = (processstr.Substring(11)).Trim(); 

      _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); //skip one part 

      f.Owner = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); 
      f.Group = _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); 

      _cutSubstringFromStringWithTrim(ref processstr, ' ', 0); //skip one part 

      DateTime createTime = DateTime.Now; 

      var dateString = _cutSubstringFromStringWithTrim(ref processstr, ' ', 8); 
      DateTime.TryParse(dateString, out createTime); 

      f.CreateTime = createTime; 
      f.Name = processstr; //Rest of the part is name 
      return f; 
     } 

     private string _cutSubstringFromStringWithTrim(ref string s, char c, int startIndex) 
     { 
      int pos1 = s.IndexOf(c, startIndex); 
      string retString = s.Substring(0, pos1); 

      s = (s.Substring(pos1)).Trim(); 

      return retString; 
     } 

     public List<FileStruct> GetDirectoryInformation(string ftpUri, NetworkCredential networkCredential) 
     { 
      List<FileStruct> directoryInfo = new List<FileStruct>(); 
      try 
      { 
       FtpWebRequest ftpClientRequest = WebRequest.Create(ftpUri) as FtpWebRequest; 
       ftpClientRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails; 
       ftpClientRequest.Proxy = null; 
       ftpClientRequest.Credentials = networkCredential; 

       FtpWebResponse response = ftpClientRequest.GetResponse() as FtpWebResponse; 
       StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.ASCII); 
       string datastring = sr.ReadToEnd(); 
       response.Close(); 

       directoryInfo = GetList(datastring); 

       return directoryInfo; 
      } 
      catch (Exception e) 
      { 
       return directoryInfo; 
      } 
     } 
    }