I'm facing a prblem with FTPWebRequest of .NET v2.0
1. The FTP server I have to access is a small device(not a PC)
which provides 2 folders named c: & d:. While attempting to
access/get/put files I always get the following exception
System.Net.WebException: The remote server returned an error: (550)
File unavail
able (e.g., file not found, no access).
   at System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
   at System.Net.FtpWebRequest.RequestCallback(Object obj)
   at System.Net.CommandStream.Abort(Exception e)
   at System.Net.FtpWebRequest.FinishRequestStage(RequestStage stage)
   at System.Net.FtpWebRequest.GetResponse()
   at ConsoleApplication1.Program.Main(String[] args)

Can anyone provide some pointers/ideas? Other FTP client softwares
like WS-FTP are able to connect
and down/upload without any issues to that server.

Thanks in advance,
Ed.
I have provided my code snippet below for your reference -

Private Sub Download(ByVal downloadUrl As String)
        Dim responseStream As Stream = Nothing
        Dim fileStream As FileStream = Nothing
        Dim reader As StreamReader = Nothing
        Try
            Dim downloadRequest As FtpWebRequest = _
                WebRequest.Create(downloadUrl)

            downloadRequest.Proxy = Nothing
            downloadRequest.UsePassive = True
            downloadRequest.UseBinary = True

            downloadRequest.Credentials = New _
    System.Net.NetworkCredential("xx", "xx")

            Dim downloadResponse As FtpWebResponse = _
                downloadRequest.GetResponse()

            responseStream = downloadResponse.GetResponseStream()

            Dim fileName As String = _

Path.GetFileName(downloadRequest.RequestUri.AbsolutePath)

            If fileName.Length = 0 Then
                reader = New StreamReader(responseStream)
                Console.WriteLine(reader.ReadToEnd())
            Else
                fileStream = File.Create(fileName)
                Dim buffer(1024) As Byte
                Dim bytesRead As Integer
                While True
                    bytesRead = responseStream.Read(buffer, 0,
buffer.Length)
                    If bytesRead = 0 Then
                        Exit While
                    End If
                    fileStream.Write(buffer, 0, bytesRead)
                End While
            End If
            Console.WriteLine(downloadResponse.StatusCode & " " &
downloadResponse.StatusDescription)
            Console.WriteLine("Download complete.")
        Catch ex As UriFormatException
            Console.WriteLine(ex.Message)
        Catch ex As WebException
            Console.WriteLine(ex.Message)
        Catch ex As IOException
            Console.WriteLine(ex.Message)
        Finally
            If reader IsNot Nothing Then
                reader.Close()
            ElseIf responseStream IsNot Nothing Then
                responseStream.Close()
            End If
            If fileStream IsNot Nothing Then
                fileStream.Close()
            End If
        End Try
    End Sub

In article <1173104033.831894.292***@q40g2000cwq.googlegroups.com>,
Edison.***@gmail.com says...
Show quoteHide quoteI would use TcpTrace (http://www.pocketsoap.com/tcptrace/) and monitor
the traffic from .NET's FTPWebRequest as well as WS-FTP and make sure
they're sending the same FTP commands.

I used ethereal and found that the error was due to FtpWebRequest
transmitting an erroneous command- CWD  c:\/c:/

Is there a way to correct this?
Thanks in advance,
Edison

Patrick Steele wrote:
Show quoteHide quote

In article <1173177449.622730.77***@30g2000cwc.googlegroups.com>,
Edison.***@gmail.com says...
Not sure.  I'm not really impressed with the FTP classes in .NET 2.0:

http://tinyurl.com/2q7kxy

What's the full URI you're using?

On Mar 7, 7:26 am, Patrick Steele <patr***@mvps.org> wrote:
Show quoteHide quoteMy url is ftp://aa.bb.cc.dd/c:/TextFile.txt.
I have also tried with ftp://aa.bb.cc.dd/c%3A/TextFile.txt.

Regret that I cannot share the IP address part of the URL.

Is there a workaround for this apart from having an implementation
using Sockets?

Thanks in advance,
Ed

In article <1173243541.949411.297***@n33g2000cwc.googlegroups.com>,
Edison.***@gmail.com says...
I'm not even sure that's a valid URI for FTP.  FTP servers don't have
the concept of drive letters.  You just connect to a site that has files
and folders.  I'm surprised that it worked in WS-FTP.

Patrick Steele wrote:
I created a directory with name as "c:" in a Linux and my app was able
to FTP to that directory without any problems.
So I think it is not a problem of ":" in the URL.
It seems to point to an internal problem in .NETv2 's FTPWebRequest
class

Is there a workaround for that?

Thanks in advance,
Ed

In article <1173446930.045492.117***@64g2000cwx.googlegroups.com>,
Edison.***@gmail.com says...
Not that I know of.  There's a bunch of free FTP source code out there
that would probably eliminate this problem.

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