FtpWebRequest question

FtpWebRequest question

• ketparm

  dear JornDev,

  You should use the system.net trace to diagnose what is happening.

  Implementing this trace is very easy : you should put the following code in the application configuration file :

  < xml version="1.0" encoding="UTF-8" >

  <configuration>
  <system.diagnostics>
  <trace autoflush="true" />
  <sources>
  <source name="System.Net">
  <listeners>
  <add name="System.Net"/>
  </listeners>
  </source>
  <source name="System.Net.HttpListener">
  <listeners>
  <add name="System.Net"/>
  </listeners>
  </source>
  <source name="System.Net.Sockets">
  <listeners>
  <add name="System.Net"/>
  </listeners>
  </source>
  <source name="System.Net.Cache">
  <listeners>
  <add name="System.Net"/>
  </listeners>
  </source>
  </sources>
  <sharedListeners>
  <add
  name="System.Net"
  type="System.Diagnostics.TextWriterTraceListener"
  initializeData="System.Net.trace.log"
  traceOutputOptions = "DateTime"
  />
  </sharedListeners>
  <switches>
  <add name="System.Net" value="Verbose" />
  <add name="System.Net.Sockets" value="Verbose" />
  </switches>
  </system.diagnostics>
  </configuration>
  

  
  
  

• Pawel Pabich

  I've taken use of your code, and I suspect it works just fine, however.. I get an exception saying:

  "The remote server returned an error: (500) Syntax error, command unrecognized."

  I have made minor alterations to your code. It fails at:

  Dim myFTPStream As System.IO.Stream = myFTPRequest.GetRequestStream()

  And jumps right down to

  Finally

  ' close the input file stream

  If myInputFileStream IsNot Nothing Then

  myInputFileStream.Close()

  myInputFileStream = Nothing

  End If

  End Try

  I guess there might be something wrong with the ftp account or something.. But I can't figure it out. I have control over the FTP server by the way, so I can edit those configurations as well. Here's my complete version of your code:

  Try

  ' open for read the source file

  Dim myInputFileStream As New System.IO.FileStream(fileNameToSave, System.IO.FileMode.Open, System.IO.FileAccess.Read)

  Dim myFileSizeInBytes As Long = myInputFileStream.Length

  Try

  ' get how many bytes is 1% of the file size

  Dim myIncrementInBytes As Long = CLng(CDbl(myFileSizeInBytes) / CDbl(100))

  ' get how many bytes is 0,1% of the file size

  Dim mySmallIncrementInBytes As Long = CLng(CDbl(myFileSizeInBytes) / CDbl(1000))

  Dim myFTPURI As System.Uri = New System.Uri(My.Settings.ftpServerAddress & "/" & My.Settings.ftpInitialDirectory)

  Dim myFTPRequest As System.Net.FtpWebRequest = CType(System.Net.FtpWebRequest.Create(myFTPURI), System.Net.FtpWebRequest)

  myFTPRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile

  myFTPRequest.Credentials = New System.Net.NetworkCredential(My.Settings.ftpUsername, My.Settings.ftpPassword, My.Settings.ftpDomain)

  myFTPRequest.UsePassive = False

  Dim myReadBytes As Long = 1

  Dim myBufferLength As Integer = 4096

  Dim myBuffer(myBufferLength) As Byte

  Dim myByteCounter As Long = 0

  Dim mySmallByteCounter As Long = 0

  Dim myProgressValue As Integer = 0

  Dim myFTPStream As System.IO.Stream = myFTPRequest.GetRequestStream()

  ' Upload the file in a try...catch...finally so we are sure to close the stream whatever happens

  Try

  Do While (myReadBytes <> 0)

  myReadBytes = myInputFileStream.Read(myBuffer, 0, myBufferLength)

  myByteCounter += myReadBytes

  mySmallByteCounter += myReadBytes

  If myReadBytes > 0 Then

  myFTPStream.Write(myBuffer, 0, CType(myReadBytes, Integer))

  End If

  If myByteCounter >= myIncrementInBytes Then

  myProgressValue += 1

  myByteCounter = 0

  'System.Threading.Thread.Sleep(100)

  End If

  If mySmallByteCounter >= mySmallIncrementInBytes Then

  mySmallByteCounter = 0

  ' Check for bandwith reduction

  If My.Settings.ftpBandWidthReduction > 0 Then

  System.Threading.Thread.Sleep(My.Settings.ftpBandWidthReduction)

  End If

  End If

  Loop

  Catch ex As Exception

  Throw ex

  Finally

  If myFTPStream IsNot Nothing Then

  myFTPStream.Close()

  Dim myFTPResponse As System.Net.WebResponse = myFTPRequest.GetResponse()

  myFTPResponse.Close()

  myFTPResponse = Nothing

  myFTPStream = Nothing

  myFTPRequest = Nothing

  End If

  End Try

  myProgressValue = 100

  Catch ex As Exception

  Throw ex

  Finally

  ' close the input file stream

  If myInputFileStream IsNot Nothing Then

  myInputFileStream.Close()

  myInputFileStream = Nothing

  End If

  End Try

  Return True

  Catch ex As Exception

  MessageBox.Show(ex.Message)

  Return False

  End Try

  Greatful for any help!!

  
  
  

• tdrock

  thanks a lot
  

• Karlo123

  Yeah, that makes sense. I've made those changes now, which are good, but still same problem.. I've set the UsePassive to false due to the fact that the ftp account is accessible through a custom port.

  The exception acts like before.

  The folder on the ftp server excist, it directs to a network share on another server. The file I'm trying to upload is .jpg image file. Maybe I have to set the binary transfer..

  Thanks for responding so fast! This error is getting on my nerve, hehe.

  Update: I tried to to set the "usebinary" to true, but still the same error..

  
  
  

• bradbury9

  locate the line in the app configuration file:

  initializeData="System.Net.trace.log"

  System.Net.trace.log is the name of the log file that will be automatically created by the trace. This file should be located in the same folder as the application configuration file ( so the folder where the application is located)

  
  
  

• John Justice

  the sample code you have posted looks correct. what doesn't work about it
  you change the request.Method to DeleteFile or UploadFile depending on what action you want to do. it may help if you could rephrase your question.
  
  thanks
  tim
  
  

• N3vik

  I've found the problem. The fileserver failed to authenticate IIS on the webserver. I tried uploading a file to a directory on the webserver and it worked just fine. Ergo; the problem is no longer mine =)

  Thank you for taking the time to help me out!

  One more thing though.. Where do I find the output of the System.Net trace Think it might come in handy later on.

  Again, thanks alot man!

  
  
  

• vaidya

  Dear JornDev,

  I think that your problem is on the following line :

  Dim myFTPURI As System.Uri = New System.Uri(My.Settings.ftpServerAddress & "/" & My.Settings.ftpInitialDirectory)

  The parameter passed to the constructor must be a file path, not a directory path.

  if you want for example to upload a local file to a distant file called myFileName.txt :

  Dim myFTPURI As System.Uri = New System.Uri("ftp://ftp.contoso.com/folder1/folder2/.../folderN/myFilename.txt")

  the subdirectories /folder1/folder2/.../folderN/ must already exist in the root directory of the connected user, prior uploading the file.

  Passive mode should also be set to true by default. However some FTP servers require pasive mode to be set to false.

  Best regards

  
  
  

• blaydes99

  Dear babakl,

  Here is some code ubout uploading a file. This should work only with the .NET 2.0 framework.

  ''' <summary>
  ''' This method makes the core job of sending the file to the FTP server.
  ''' </summary>
  ''' <param name="SourceFilePath">Absolute File path of the file to be send</param>
  ''' <param name="TargetFilePath">absolute FTP Path in the FTP server.</param>
  ''' <returns></returns>
  ''' <remarks></remarks>
  Private Function StartUpload(ByVal SourceFilePath As String, ByVal TargetFilePath As String) As Boolean
  Try

  If SourceFilePath Is Nothing Then
  Return False
  End If

  If SourceFilePath.Length = 0 Then
  Return False
  End If

  If TargetFilePath Is Nothing Then
  Return False
  End If

  If TargetFilePath.Length = 0 Then
  Return False
  End If

  ' Check if the source file exists
  If Not System.IO.File.Exists(SourceFilePath) Then
  ' remove the file entry from the data provider
  Return False
  End If

  If Not InitSettings() Then
  Return False
  End If

  ' open for read the source file
  Dim myInputFileStream As New System.IO.FileStream(SourceFilePath, System.IO.FileMode.Open, System.IO.FileAccess.Read)
  Dim myFileSizeInBytes As Long = myInputFileStream.Length

  Try
  ' get how many bytes is 1% of the file size
  Dim myIncrementInBytes As Long = CLng(CDbl(myFileSizeInBytes) / CDbl(100))

  ' get how many bytes is 0,1% of the file size
  Dim mySmallIncrementInBytes As Long = CLng(CDbl(myFileSizeInBytes) / CDbl(1000))

  Dim myFTPURI As System.Uri = New System.Uri(TargetFilePath)

  Dim Msg As String = "Trying to contact : '" & private_Settings.DNSorIPAddress & "' on port " & private_Settings.PortNumber
  RaiseEvent OnInfo(Msg)
  System.Windows.Forms.Application.DoEvents()

  Msg = "Login : '" & private_Settings.Login & "'"
  RaiseEvent OnInfo(Msg)
  System.Windows.Forms.Application.DoEvents()

  Msg = "Passive mode : " & private_Settings.PassiveMode.ToString
  RaiseEvent OnInfo(Msg)
  System.Windows.Forms.Application.DoEvents()

  Msg = "BandWith reduction : " & private_Settings.BandWithReduction.ToString
  RaiseEvent OnInfo(Msg)
  System.Windows.Forms.Application.DoEvents()

  Msg = "Destination : '" & myFTPURI.ToString & "'"
  RaiseEvent OnInfo(Msg)
  System.Windows.Forms.Application.DoEvents()

  Dim myFTPRequest As System.Net.FtpWebRequest = CType(System.Net.FtpWebRequest.Create(myFTPURI), System.Net.FtpWebRequest)
  myFTPRequest.Method = System.Net.WebRequestMethods.Ftp.UploadFile
  myFTPRequest.Credentials = New System.Net.NetworkCredential(private_Settings.Login, private_Settings.PassWord)
  myFTPRequest.UsePassive = private_Settings.PassiveMode

  Dim myReadBytes As Long = 1
  Dim myBufferLength As Integer = 4096
  Dim myBuffer(myBufferLength) As Byte
  Dim myByteCounter As Long = 0
  Dim mySmallByteCounter As Long = 0
  Dim myProgressValue As Integer = 0

  Dim myFTPStream As System.IO.Stream = myFTPRequest.GetRequestStream()
  ' Upload the file in a try...catch...finally so we are sure to close the stream whatever happens
  Try
  RaiseEvent OnBegin()
  RaiseEvent OnProgress(myProgressValue)
  RaiseEvent OnBytesProcessed(0)
  System.Windows.Forms.Application.DoEvents()

  Do While (myReadBytes <> 0)
  myReadBytes = myInputFileStream.Read(myBuffer, 0, myBufferLength)
  myByteCounter += myReadBytes
  mySmallByteCounter += myReadBytes

  If myReadBytes > 0 Then
  myFTPStream.Write(myBuffer, 0, CType(myReadBytes, Integer))
  End If

  If myByteCounter >= myIncrementInBytes Then
  myProgressValue += 1
  myByteCounter = 0
  RaiseEvent OnProgress(myProgressValue)
  System.Windows.Forms.Application.DoEvents()
  'System.Threading.Thread.Sleep(100)
  End If

  If mySmallByteCounter >= mySmallIncrementInBytes Then
  RaiseEvent OnBytesProcessed(mySmallByteCounter)
  System.Windows.Forms.Application.DoEvents()
  mySmallByteCounter = 0

  ' Check for bandwith reduction
  If private_Settings.BandWithReduction > 0 Then
  System.Threading.Thread.Sleep(private_Settings.BandWithReduction)
  End If
  End If
  Loop

  Catch ex As Exception
  Throw ex
  

  Finally
  If myFTPStream IsNot Nothing Then
  myFTPStream.Close()

  Dim myFTPResponse As System.Net.WebResponse = myFTPRequest.GetResponse()
  myFTPResponse.Close()
  myFTPResponse = Nothing
  myFTPStream = Nothing
  myFTPRequest = Nothing

  End If
  End Try
  

  myProgressValue = 100
  RaiseEvent OnProgress(myProgressValue)
  RaiseEvent OnBytesProcessed(mySmallByteCounter)
  RaiseEvent OnEnd()
  System.Windows.Forms.Application.DoEvents()

  Catch ex As Exception
  Throw ex

  Finally
  ' close the input file stream
  If myInputFileStream IsNot Nothing Then
  myInputFileStream.Close()
  myInputFileStream = Nothing
  End If

  End Try

  Return True

  Catch ex As Exception
  Return False

  End Try
  End Function

  
  
  

• castrini

  Dear JornDev,

  Did you set the port number in the ftp adress ( like ftp://ftp.contoso.com:26/folder1/folder2/.../folderN/myFilename.txt )

  Next, If you are using TYPSotf FTP Server, you must not use a network share as the entry point of the account user. Instead you must mount a network drive that is associated with this network share, and then you declare that new drive letter as the entry point of your user account.

  
  
  

• chaillom

  Yes, the port number is set. The absoluteURI looks like this:

  ftp://ftp.domain.no:7997/folder/filname.jpg

  I'm using IIS 6 on Windows Server 2003 Web Edition. The target directory is located on a Windows Server 2003 box.

  I tried changing the port to 21. Works much better. There is an error still though. No access to the file, but I think I might be able to fix that. I would like to use another port than 21 though..

  This make any sense to you Can't I use port 7997

  
  
  
• FtpWebRequest question