A friend asked me if Powershell can do simple file up and downloads. My answer was, yes of course, very easy. So this is a post with a little information about how you can do a FTP Upload or a FTP Download using Powershell. To be clear, of course you can do much more. But this post should show you the basic function of FTP transfers in Powershell based on the .NET Framework.

Download File:

# Config
$Unsername = "FTPUSER"
$Password = "P@assw0rd"
$LocalFile = "C:\Temp\file.zip"
$RemoteFile = "ftp://thomasmaurer.ch/downloads/files/file.zip"

# Create FTP Rquest Object
$FTPRequest = [System.Net.FtpWebRequest]::Create("$RemoteFile")
$FTPRequest = [System.Net.FtpWebRequest]$FTPRequest
$FTPRequest.Method = [System.Net.WebRequestMethods+Ftp]::UploadFile
$FTPRequest.Credentials = new-object System.Net.NetworkCredential($Username, $Password)
$FTPRequest.UseBinary = $true
$FTPRequest.UsePassive = $true
# Read the File for Upload
$FileContent = gc -en byte $LocalFile
$FTPRequest.ContentLength = $FileContent.Length
# Get Stream Request by bytes
$Run = $FTPRequest.GetRequestStream()
$Run.Write($FileContent, 0, $FileContent.Length)
# Cleanup
$Run.Close()
$Run.Dispose()

Upload File:

# Config
$Unsername = "FTPUSER"
$Password = "P@assw0rd"
$LocalFile = "C:\Temp\file.zip"
$RemoteFile = "ftp://thomasmaurer.ch/downloads/files/file.zip"

# Create a FTPWebRequest
$FTPRequest = [System.Net.FtpWebRequest]::Create($RemoteFile)
$FTPRequest.Credentials = New-Object System.Net.NetworkCredential($Username,$Password)
$FTPRequest.Method = [System.Net.WebRequestMethods+Ftp]::DownloadFile
$FTPRequest.UseBinary = $true
$FTPRequest.KeepAlive = $false
# Send the ftp request
$FTPResponse = $FTPRequest.GetResponse()
# Get a download stream from the server response
$ResponseStream = $FTPResponse.GetResponseStream()
# Create the target file on the local system and the download buffer
$LocalFileFile = New-Object IO.FileStream ($LocalFile,[IO.FileMode]::Create)
[byte[]]$ReadBuffer = New-Object byte[] 1024
# Loop through the download
	do {
		$ReadLength = $ResponseStream.Read($ReadBuffer,0,1024)
		$LocalFileFile.Write($ReadBuffer,0,$ReadLength)
	}
	while ($ReadLength -ne 0)