FtpWebRequest Download File

Question

The following code is intended to retrieve a file via FTP   However  I m getting an error with it   serverPath    ftp   x x x x tmp myfile txt    FtpWebRequest request    FtpWebRequest WebRequest Create serverPath    request KeepAlive   true  request UsePassive   true  request UseBinary   true   request Method   WebRequestMethods Ftp DownloadFile                  request Credentials   new NetworkCredential username  password       Read the file from the server  amp  write to destination                 using  FtpWebResponse response    FtpWebResponse request GetResponse       Error here using  Stream responseStream   response GetResponseStream    using  StreamReader reader   new StreamReader responseStream               using  StreamWriter destination   new StreamWriter destinationFile         destination Write reader ReadToEnd         destination Flush        The error is      The remote server returned an error   550  File unavailable  e g   file not found  no access    The file definitely does exist on the remote machine and I am able to perform this ftp manually  i e  I have permissions    Can anyone tell me why I might be getting this error

User · Accepted Answer

This paragraph from the FptWebRequest class reference might be of interest to you:

The URI may be relative or absolute. If the URI is of the form "ftp://contoso.com/%2fpath" (%2f is an escaped '/'), then the URI is absolute, and the current directory is /path. If, however, the URI is of the form "ftp://contoso.com/path", first the .NET Framework logs into the FTP server (using the user name and password set by the Credentials property), then the current directory is set to /path.

User · Answer

Easiest way The most trivial way to download a binary file from an FTP server using  NET framework is using WebClient DownloadFile  WebClient client   new WebClient    client Credentials   new NetworkCredential  quot username quot    quot password quot    client DownloadFile       quot ftp   ftp example com remote path file zip quot     quot C  local path file zip quot      Advanced options Use FtpWebRequest  only if you need a greater control  that WebClient does not offer  like TLS SSL encryption  progress monitoring  ascii text transfer mode  resuming transfers  etc   Easy way is to just copy an FTP response stream to FileStream using Stream CopyTo  FtpWebRequest request        FtpWebRequest WebRequest Create  quot ftp   ftp example com remote path file zip quot    request Credentials   new NetworkCredential  quot username quot    quot password quot    request Method   WebRequestMethods Ftp DownloadFile   using  Stream ftpStream   request GetResponse   GetResponseStream    using  Stream fileStream   File Create   quot C  local path file zip quot          ftpStream CopyTo fileStream       Progress monitoring If you need to monitor a download progress  you have to copy the contents by chunks yourself  FtpWebRequest request        FtpWebRequest WebRequest Create  quot ftp   ftp example com remote path file zip quot    request Credentials   new NetworkCredential  quot username quot    quot password quot    request Method   WebRequestMethods Ftp DownloadFile   using  Stream ftpStream   request GetResponse   GetResponseStream    using  Stream fileStream   File Create   quot C  local path file zip quot          byte   buffer   new byte 10240       int read      while   read   ftpStream Read buffer  0  buffer Length    gt  0                fileStream Write buffer  0  read           Console WriteLine  quot Downloaded  0  bytes quot   fileStream Position            For GUI progress  WinForms ProgressBar   see  FtpWebRequest FTP download with ProgressBar  Downloading folder If you want to download all files from a remote folder  see C  Download all files and subdirectories through FTP

User · Answer

I had the same issue   My solution was to insert the public html folder into the download URL   Real file location on the server      myhost com public html myimages image png   Web URL      www myhost com myimages image png

User · Answer

I know this is an old Post but I am adding here for future reference  Here is a solution that I found       private void DownloadFileFTP                 string inputfilepath     C  Temp FileName exe           string ftphost    xxx xx x xxx           string ftpfilepath     Updater Dir1 FileName exe            string ftpfullpath    ftp       ftphost   ftpfilepath           using  WebClient request   new WebClient                          request Credentials   new NetworkCredential  UserName    P 55w0rd                byte   fileData   request DownloadData ftpfullpath                using  FileStream file   File Create inputfilepath                                 file Write fileData  0  fileData Length                   file Close                              MessageBox Show  Download Complete                      Updated based upon excellent suggestion by Ilya Kogan

User · Answer

FYI  Microsoft recommends not using FtpWebRequest for new development   We don t recommend that you use the FtpWebRequest class for new development  For more information and alternatives to FtpWebRequest  see WebRequest shouldn t be used on GitHub   The GitHub link directs to this SO page which contains a list of third-party FTP libraries  such as FluentFTP

User · Answer

private static DataTable ReadFTP CSV                 String ftpserver    ftp   servername ImportData xxxx csv           FtpWebRequest reqFTP    FtpWebRequest FtpWebRequest Create new Uri ftpserver             reqFTP Credentials   new NetworkCredential ftpUserID  ftpPassword           FtpWebResponse response    FtpWebResponse reqFTP GetResponse             Stream responseStream   response GetResponseStream                use the stream to read file from FTP          StreamReader sr   new StreamReader responseStream           DataTable dt csvFile   new DataTable              region Code           Add Code Here To Loop txt or CSV file          endregion          return dt csvFile             I hope it can help you

User · Answer

public void download string remoteFile  string localFile               private string host    yourhost          private string user    username          private string pass    passwd          private FtpWebRequest ftpRequest   null         private FtpWebResponse ftpResponse   null         private Stream ftpStream   null         private int bufferSize   2048           try                       ftpRequest    FtpWebRequest FtpWebRequest Create host         remoteFile                ftpRequest Credentials   new NetworkCredential user  pass                ftpRequest UseBinary   true              ftpRequest UsePassive   true              ftpRequest KeepAlive   true               ftpRequest Method   WebRequestMethods Ftp DownloadFile              ftpResponse    FtpWebResponse ftpRequest GetResponse                ftpStream   ftpResponse GetResponseStream                 FileStream localFileStream   new FileStream localFile  FileMode Create                byte   byteBuffer   new byte bufferSize               int bytesRead   ftpStream Read byteBuffer  0  bufferSize                try                               while  bytesRead  gt  0                                        localFileStream Write byteBuffer  0  bytesRead                       bytesRead   ftpStream Read byteBuffer  0  bufferSize                                                catch  Exception                    localFileStream Close                ftpStream Close                ftpResponse Close                ftpRequest   null                     catch  Exception               return

User · Answer

FtpWebRequest request    FtpWebRequest WebRequest Create serverPath     After this you may use the below line to avoid error   access denied etc    request Proxy   null

[c#] FtpWebRequest Download File

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