FTP using Powershell

Below code can be used to perform FTP upload and Download using Powershell:

param([Parameter(Mandatory=$true,Position=0)] [string]$SourceFilePath, [Parameter(Mandatory=$true,Position=1)] [string]$TargetFilepath,[Parameter(Mandatory=$true,Position=2)][ValidateSet("Upload","Download")]$OperationType)

try
{

$Username = "temp-account"
$Password = "tempPassword"
     
         if($OperationType -eq "Upload")
 {
$serverUri = "ftp://ftp2.myweb.com" + $TargetFilepath
  }
          else
           {
              $serverUri =  "ftp://ftp2.myweb.com" + $SourceFilePath
            }  

     [System.Net.FtpWebRequest] $FTPrequest  =  [System.Net.FtpWebRequest]::Create($serverUri)
      $FTPRequest.Credentials = new-object System.Net.NetworkCredential($Username, $Password)
$FTPRequest.Timeout = 10000  #Time out in Milliseconds
$FTPRequest.UsePassive = $true
$FTPRequest.UseBinary = $false
$FTPRequest.KeepAlive = $false   #This is important property  and terminates connection after
                                                                     # completion of operation

if($OperationType -eq "Upload")
{
              $SourceFile = $SourceFilePath

$FTPrequest.Method = [System.Net.WebRequestMethods+Ftp]::UploadFile

Write-host "Uploading File..."  
#Create a request Stream
[System.IO.Stream] $requestStream = $FTPRequest.GetRequestStream()

if($requestStream -ne $null)
{
   #Read File to be uploaded
   $FileContents = Get-Content -path $SourceFile -encoding byte
#Write File
$requestStream.write($FileContents, 0, $FileContents.Length)
$requestStream.Close()  
$requestStream.dispose()

#Validating Status of Upload
[System.Net.FtpWebResponse] $response = $FTPrequest.GetResponse();
Write-host "File Upload Status $($response.StatusDescription)"  
$response.Close()
$response.dispose()
}
else
{
  [System.Net.FtpWebResponse] $response = $FTPrequest.GetResponse();
Write-host "File Upload Status $($response.StatusDescription)"  
}
}
elseif($OperationType -eq "Download")
{
           $TargetFile = $TargetFilepath
  Write-host "Downloading File..."
  $FTPRequest.Method = [System.Net.WebRequestMethods+Ftp]::DownloadFile;

  #Get the response object
[System.Net.FtpWebResponse] $FTPResponse = $FTPRequest.GetResponse()
if($FTPResponse -ne $null)
{
[System.IO.Stream] $responseStream = $FTPResponse.GetResponseStream()
System.IO.FileStream]$FileStream = New-Object System.IO.FileStream($TargetFile,[System.IO.FileMode]::Create)
 [byte[]]$ReadBuffer = New-Object byte[] 1024

 do {
              $ReadLength = $ResponseStream.Read($ReadBuffer,0,1024)
$FileStream.Write($ReadBuffer,0,$ReadLength)
                      } while ($ReadLength -ne 0)

 Write-host "File Download Status $($FTPResponse.StatusDescription)"

 $FileStream.Close()
 $FileStream.dispose()
         $responseStream.Close()  
 $responseStream.dispose()
}
}
}
 catch [Exception]
  {
    if($requestStream -ne $null)
{
 $requestStream.Close()  
 $requestStream.dispose()
}

if($responseStream -ne $null)
{
 $responseStream.Close()  
 $responseStream.dispose()
}

if($FileStream -ne $null)
{
 $FileStream.Close()  
 $FileStream.dispose()
}

    Write-host "Exception Type: $($_.Exception.GetType().FullName);`n
    Exception Code: $($_.Exception.ErrorCode);Exception Message: $($_.Exception.Message) "
  }


#Usage

#Upload
FTPUploadDownload.ps1 "D:\Temp\FileNametobeUploaded.txt"   "/FTPFolder/Targetfilename.txt"    Upload

#Download
 FTPUploadDownload.ps1 "/FTPFolder/Sourcename.txt"    "D:\Temp\DownloadedFileName.txt"  Download