Function Ftp-DirectoryItemSize {
	<#
	.SYNOPSIS
	    Gets total size (in KB) of all items on FTP site.

	.DESCRIPTION
	    The Ftp-DirectoryItemSize cmdlet returns total size (in KB) of items on FTP site as an integer.
		
	.PARAMETER RequestURI
	    Specifies a path to ftp location. 
		
	.PARAMETER User
		Specifies user name to access FTP site.
		
	.PARAMETER Pass
		Specifies password to access FTP site
	
	.EXAMPLE
		Ftp-DirectoryItemSize -RequestURI "ftp://<ftp site>/<ftp folder>/" -User "<user name>" -Pass "<password>"

	.NOTES
		Author: Jennifer Salvo
	#>  

	Param (
		[parameter(Mandatory=$true)]
		$requestURI="",
		[parameter(Mandatory=$true)]
		[String]$User="",
		[parameter(Mandatory=$true)]
		[String]$Pass=""
	)
	
	Try {
		$sizeOnFTP = 0
	
		[System.Net.FtpWebRequest]$Request = [System.Net.WebRequest]::Create($RequestURI)
		$Request.Credentials =  New-Object System.Net.NetworkCredential($User,$Pass)

		$Request.Method = [System.Net.WebRequestMethods+FTP]::ListDirectoryDetails

		$Response = $Request.GetResponse()
		[System.IO.StreamReader]$Stream = $Response.GetResponseStream()

		Try{
			[string]$Line = $Stream.ReadLine()
		} Catch{ 
			$Line = $null
		}

		while ($Line) {
			[string]$Date,[string]$Time,[string]$Size,[string]$Name = $Line -split '\s+'
			$sizeOnFTP = $sizeOnFTP + $Size
			[string]$Line = $Stream.ReadLine()
		}

		$Response.Close()
	} Catch {
		throw "Failed getting directory item size - $Error[0]"
		exit 1
	}
	
	return ($sizeOnFTP / 1024)
	
}