FTP Upload using PowerShell

Copy-FtpItem.ps1

Function Copy-FtpItem {
	[CmdletBinding()]
	Param (
		[Parameter(Mandatory, ValueFromPipeline)]
		[string[]]$Path
		,
		[Parameter(Mandatory)]
		[string]$FtpHost
		,
		[Parameter()]
		[int]$Port = 21
		,
		[Parameter(Mandatory)]
		[System.Management.Automation.PSCredential]
		[System.Management.Automation.Credential()]$Credential
		,
		[Parameter()]
		[string]$Folder = ''
		,
		[Parameter()]
		[Switch]$UseBinary
		,
		[Parameter()]
		[Switch]$UsePassive
	)
	Process {
		# note: assume it negotiates TLS, rather than requiring implicit FTPS://..
		$ftpUriRoot = "ftp://$($FtpHost):$($Port)/$($Folder.Trim('[/\\]'))"
		foreach ($file in $Path) {
			$fn = Split-Path -Path $file -Leaf
			$uri = '{0}/{1}' -f $ftpUriRoot, $fn
			
			$ftp = [System.Net.FtpWebRequest]::Create($uri) # could alternatively use [System.Net.WebRequest] and have it implicitly convert
			$ftp.Credentials = $Credential
			$ftp.Method = [System.Net.WebRequestMethods+Ftp]::UploadFile
			$ftp.UseBinary = $UseBinary.IsPresent
			$ftp.UsePassive = $UsePassive.IsPresent
			
			try {
				$fs = [System.IO.File]::OpenRead($file)
				$ftps = $ftp.GetRequestStream()
				$fs.CopyTo($ftps)
			} finally {
				if ($null -ne $ftps) {$ftps.Dispose(); $ftps = $null}
				if ($null -ne $fs) {$fs.Dispose(); $fs = $null}
			}
		}
	}
}

$creddyMurphy = [System.Management.Automation.PSCredential]::new('abcdef', ('ghijklmn' | ConvertTo-SecureString -AsPlainText -Force))
Copy-FtpItem -Path 'c:\temp\poc.zip' -FtpHost 'ftp.example.com' -Port 21 -Credential $creddyMurphy -Folder 'TargetFolder' -UseBinary -UsePassive -Verbose -ErrorAction Stop