c# - FtpWebRequest 返回 "The remote server returned an error: (530) Not logged in"

Question

我收到此错误“远程服务器返回错误:(530) 未登录。”使用 FtpWebRequest 上传文件时。

1. 仅当我将文件传输到具有子文件夹的路径时才会发生错误，否则它会正常工作。
   

2. 上传大约 5 到 10 MB 的大文件时，会超时。

   void FtpTransfer(string siteName, string portNumber, string ftpUser, string ftpPassword, string destPath)
   {
       FtpWebRequest request;
       DateTime now = DateTime.Now;
       string now_string =
           (now.Year).ToString()
           + "_" +
           (now.Month).ToString("0#")
           + "_" +
           (now.Day).ToString("0#");
   
       foreach (object item in listBox1.Items)
       {
           string srcFile = item.ToString();
           lblSource.Text = srcFile;
           Uri uri = new Uri(srcFile);
           string destFile = srcFile.Replace(lblPath.Text, "").Replace("\\\\", "\\").Replace("\\", "/").Replace("www/","");
   
           Configuration oConfig = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
           int timeout = int.Parse(oConfig.AppSettings.Settings["TimeOut"].Value);
   
           if (siteName == "mysite1.co.in" || siteName == "sd1.mysite2.net")
               destFile = "ftp://" + siteName + ":" + portNumber + "/" + siteName + "/_test" + destFile; //error here
           else
               destFile = "ftp://" + siteName + ":" + portNumber + "/" + siteName + destFile; //no error
           lblDestn.Text = destFile;
   
           request = (FtpWebRequest)WebRequest.Create(destFile);
           request.Credentials = new NetworkCredential(ftpUser, ftpPassword);
           request.Timeout = 6000;
           request.Method = WebRequestMethods.Ftp.UploadFile;
           request.UsePassive = true;
           request.UseBinary = true;
           request.KeepAlive = true;
   
           // Copy the contents of the file to the request stream.
           StreamReader sourceStream = new StreamReader(@srcFile);
           byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
           sourceStream.Close();
           request.ContentLength = fileContents.Length;
   
           Stream requestStream = request.GetRequestStream();
           requestStream.Write(fileContents, 0, fileContents.Length);
           requestStream.Close();
   
           FtpWebResponse response = (FtpWebResponse)request.GetResponse();
   
           string path = System.IO.Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]);
           System.IO.StreamWriter w = System.IO.File.AppendText(path + "\\log_" + now_string + ".txt");
           w.WriteLine(DateTime.Now.ToString("yyy-MM-dd HH:mm:ss")
               + " "
               + srcFile
               + " "
               + destFile
               + " "
               + response.StatusDescription);
   
           w.Close();
   
           response.Close();
       }
   

Answer 1

我假设您已经尝试通过标准 FTP 客户端执行相同的操作。如果没有，试试看。然后我会使用 Wireshark 来确保这是来自服务器的响应并验证是否正在发送凭据。验证后，与 FTP 所有者核实并确保服务器配置正确。