无法从FTP下载.zip文件 [英] Unable to download .zip file from FTP

问题描述

Hi,

private void Download()
        {
            Uri url = new Uri("ftp://"+FtpAddress+"/filename");
            if (url.Scheme == Uri.UriSchemeFtp)
            {
                FtpWebRequest objRequest = (FtpWebRequest)FtpWebRequest.Create(url);
                //Set credentials if required else comment this Credential code
                NetworkCredential objCredential = new NetworkCredential(sFtpUsername,sFtpPassword);
                objRequest.Credentials = objCredential;
                objRequest.Method = WebRequestMethods.Ftp.DownloadFile;
                FtpWebResponse objResponse = (FtpWebResponse)objRequest.GetResponse();
                StreamReader objReader = new StreamReader(objResponse.GetResponseStream());
                byte[] buffer = new byte[16 * 1024];
                int len = 0;
                FileStream objFS = new FileStream("Test.jpg", FileMode.Create, FileAccess.Write, FileShare.Read);
                while ((len = objReader.BaseStream.Read(buffer, 0, buffer.Length)) != 0)
                {
                    objFS.Write(buffer, 0, len);
                }
                objFS.Close();
                objResponse.Close();
            }
        }

我使用上面的代码从FTP服务器下载文件。我能够下载文件而不是.zip，.rar文件。如何从FTP下载.zip，.rar文件请帮我解决这个问题。当我尝试下载.zip文件时，我收到以下错误远程服务器返回错误：（502）Bad Gateway。

I use the above code to download files from FTP server. I am able to download the files not .zip,.rar files. How to download .zip,.rar files from FTP please help me to solve this issue. When I try to download .zip file, I get the following error The remote server returned an error: (502) Bad Gateway.

推荐答案

尝试下面的代码，它的工作原理对我来说很好

Try bellow code, it works perfectly for me

public static List<periodicalfile> GetFTPFilesPath(string ftpAddress, string UserName, string Password)
        {
           
            FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(ftpAddress);

            try
            {
                reqFTP.UsePassive = true;
                reqFTP.UseBinary = true;
                reqFTP.KeepAlive = false;
                reqFTP.Credentials = new NetworkCredential(UserName, Password);
                reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                Stream responseStream = response.GetResponseStream();
                List<string> files = new List<string>();
                StreamReader reader = new StreamReader(responseStream);
                while (!reader.EndOfStream)
                    files.Add(reader.ReadLine());
                reader.Close();
                responseStream.Dispose();
                
                //Loop through the resulting file names.
                string ftpPath = string.Empty;
                foreach (var fileName in files)
                {
                    var parentDirectory = "";
                    PeriodicalFile lstFile = new PeriodicalFile();
                    //If the filename has an extension, then it actually is 
                    //a file            
                    if (fileName.Contains(".zip"))
                    {
                        ftpPath = ftpAddress + fileName;
                        lstFile.FTPFileName = ftpPath;
                        listAllFTPFolder.Add(lstFile);
                    }
                    else
                    {
                        //If the filename has no extension, then it is just a folder. 
                        //Run this method again as a recursion of the original:
                        parentDirectory += fileName + "/";
                        try
                        {
                            GetFTPFilesPath(ftpAddress + "/" + parentDirectory, UserName, Password);
                        }
                        catch (Exception ex)
                        {
                            ErrorLog.WriteLog("ftpFileProcessing", "GetFTPFilesPath(Else)", ex.Message, ex.StackTrace, "");
                        }
                    }
                }
                
            }
            

            catch (Exception excpt)
            {

                reqFTP.Abort();
                ErrorLog.WriteLog("ftpFileProcessing", "GetFTPFilesPath", excpt.Message, excpt.StackTrace, "");

            }


            return listAllFTPFolder;

试试这个,,, :)

Try this,,,:)

Uri url = new Uri("ftp://ftp.demo.com/file1.txt");
if (url.Scheme == Uri.UriSchemeFtp)
{
    FtpWebRequest objRequest = (FtpWebRequest)FtpWebRequest.Create(url);
    //Set credentials if required else comment this Credential code
    NetworkCredential objCredential = new NetworkCredential("FTPUserName", "FTPPassword");
    objRequest.Credentials = objCredential;
    objRequest.Method = WebRequestMethods.Ftp.DownloadFile;
    FtpWebResponse objResponse = (FtpWebResponse)objRequest.GetResponse();
    StreamReader objReader = new StreamReader(objResponse.GetResponseStream());
    byte[] buffer = new byte[16 * 1024];
    int len = 0;
    FileStream objFS = new FileStream(Server.MapPath("file1.txt"), FileMode.Create, FileAccess.Write, FileShare.Read);
    while ((len = objReader.BaseStream.Read(buffer, 0, buffer.Length)) != 0)
    {
        objFS.Write(buffer, 0, len);
    }
    objFS.Close();
    objResponse.Close();
}

http://www.vcskicks.com/download-file-ftp.php [ ^ ]

您不需要这个。请根据您的要求进行修改，我会再次发布，根据您的要求进行更改

You do not need this. please modify as per your requirement, i am posting this again, changes as per your requirement

public static void DownloadFTPFiles(string ftpAddress, string UserName, string Password)
{
    FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(ftpAddress);

    try
    {
        reqFTP.UsePassive = true;
        reqFTP.UseBinary = true;
        reqFTP.KeepAlive = false;
        reqFTP.Credentials = new NetworkCredential(UserName, Password);
        reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;
        FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

        Stream responseStream = response.GetResponseStream();
        List<string> files = new List<string>();
        StreamReader reader = new StreamReader(responseStream);
        while (!reader.EndOfStream)
            files.Add(reader.ReadLine());
        reader.Close();
        responseStream.Dispose();
        List<periodicalfile> lstFiles = new List<periodicalfile>();
        //Loop through the resulting file names.
        string ftpPath = string.Empty;
        foreach (var fileName in files)
        {
            var parentDirectory = "";                   
            if (fileName.Contains(".zip"))
            {
                ftpPath = ftpAddress + fileName;
                wc.Credentials = new NetworkCredential(UserName, Password);
                wc.DownloadFile(file.FTPFileName, DestinationFolder + fileName);//DOWLOAD FROM FTP
            }
            else
            {
                //If the filename has no extension, then it is just a folder. 
                //Run this method again as a recursion of the original:
                parentDirectory += fileName + "/";
                try
                {
                    DownloadFTPFiles(ftpAddress + "/" + parentDirectory, UserName, Password);
                }
                catch (Exception ex)
                {
                    ErrorLog.WriteLog("ftpFileProcessing", "DownloadFTPFiles(Else)", ex.Message, ex.StackTrace, "");
                }
            }
        }
    }
    catch (Exception excpt)
    {
        reqFTP.Abort();
        ErrorLog.WriteLog("ftpFileProcessing", "DownloadFTPFiles", excpt.Message, excpt.StackTrace, "");
    }
}

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