有时FTP会失败

本文关键字：失败 FTP 有时 | 更新日期: 2023-09-27 18:19:23

我的项目必须上传和下载大量的文件从Unix服务器和使用ftp在我的windows操作。我的代码是这样的

   ftpRequest = (FtpWebRequest)FtpWebRequest.Create(reviewfilepath);
                    ftpRequest.Credentials = new NetworkCredential(user, pass);                        
                    ftpRequest.UseBinary = true;
                    ftpRequest.UsePassive = true;
                    ftpRequest.KeepAlive = false;
                    ftpRequest.Proxy = null;
                    ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
                     ftpStream = ftpRequest.GetRequestStream();
                     FileStream localFileStream = new FileStream(reviewsourcewordpath, FileMode.OpenOrCreate);
                     byte[] byteBuffer = new byte[bufferSize];
                    int bytesSent1 = localFileStream.Read(byteBuffer, 0, bufferSize);
                    try
                    {
                        while (bytesSent1 != 0)
                        {
                            ftpStream.Write(byteBuffer, 0, bytesSent1);
                            bytesSent1 = localFileStream.Read(byteBuffer, 0, bufferSize);
                        }
                        string path = cls_appvars.Set_App_Path + cls_appvars.Set_Log_dir + "SystemLog.txt";
                        System.IO.File.AppendAllText(path, System.DateTime.Now + "***ftp_documents() in cls_accdet***" + jobid + "_review ----- File uploaded Sucessfully" + Environment.NewLine);
                    }
                    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                    /* Resource Cleanup */
                    localFileStream.Close();
                    ftpStream.Close();
                    ftpRequest = null;

问题是FTP失败，得到异常

     System.Net.WebException: The operation has timed out.
 at System.Net.FtpWebRequest.GetRequestStream()

我在客户端机器上禁用了防火墙，启用了ftp.exe并给了用户完全的权限，但仍然得到异常。

谢谢,

Suressh

有时FTP会失败

只要增加FtpWebRequest超时，例如

ftpRequest.Timeout = 30000 // in milliseconds

FTP有时会由于丢包、某些连接限制或其他技术原因而失败。如果您的应用程序依赖于该传输，则在从该调用返回之前编写一些重试逻辑。将请求放入循环中，成功时返回内容，第三次失败时重新抛出异常。

将此添加到项目的配置文件中

<configuration>
    <system.net>
        <connectionManagement>
        <add address="*" maxconnection="100" />
        </connectionManagement>
    </system.net>
</configuration>
相关文章：