Powershell Download Script

# If you haven't already done so you will need to run this to be able to execute PowerShell scripts
# You will need to run PowerShell as administrator to run this script
set-executionpolicy remotesigned

Pass variables to the script

<#
.SYNOPSIS
    Downloads one file from a defined URL to a defined directory path
.DESCRIPTION
    This script is designed to take a defined URL and download it to a defined directory on your computer.
    The script will assume the file name part of the URL is the file name for the computer.
.PARAMETER Path
.PARAMETER LiteralPath
.Example
    DownloadFile.ps1 http://www.kittell.net/downloadfile.txt c:usersdkittelldesktop
.Inputs
    [String]$WebURL
    [String]$FileDirectory
.Link
    
Powershell Download Script

#>

# URL Parameter
$WebURL = $args[0]

# Directory Parameter
$FileDirectory = $args[1]

# If directory doesn't exist create the directory
if((Test-Path $FileDirectory) -eq 0)
    {
        mkdir $FileDirectory;
        cd $FileDirectory;
    }

# We assume the file you download is named what you want it to be on your computer
$FileName = [System.IO.Path]::GetFileName($WebURL)

# Concatenate the two values to prepare the download
$FullFilePath = "$($FileDirectory)$($FileName)"

# Give a basic message to the user to let them know what we are doing
Write-Host "Downloading '$WebURL' to '$FullFilePath'"

    $uri = New-Object "System.Uri" "$WebURL"
    $request = [System.Net.HttpWebRequest]::Create($uri)
    $request.set_Timeout(15000) #15 second timeout
    $response = $request.GetResponse()
    $totalLength = [System.Math]::Floor($response.get_ContentLength()/1024)
    $responseStream = $response.GetResponseStream()
    $targetStream = New-Object -TypeName System.IO.FileStream -ArgumentList $FullFilePath, Create
    $buffer = new-object byte[] 10KB
    $count = $responseStream.Read($buffer,0,$buffer.length)
    $downloadedBytes = $count
    while ($count -gt 0)
    {
        [System.Console]::Write("`r`nDownloaded {0}K of {1}K", [System.Math]::Floor($downloadedBytes/1024), $totalLength)
        $targetStream.Write($buffer, 0, $count)
        $count = $responseStream.Read($buffer,0,$buffer.length)
        $downloadedBytes = $downloadedBytes + $count
    }

    $targetStream.Flush()
    $targetStream.Close()
    $targetStream.Dispose()
    $responseStream.Dispose()


# Give a basic message to the user to let them know we are done
Write-Host "`r`nDownload complete"

powershell -file DownloadFile.ps1 http://www.kittell.net/downloadfile.txt c:usersdkittelldesktop

Manually type values in the script execution

# Request the URL
$sWebURL = Read-Host -Prompt 'Input the URL to download from'

# Request the Directory to download to
$sFileDirectory = Read-Host -Prompt 'Input the directory path to download to (remember to include end )'

# We assume the file you download is named what you want it to be on your computer
$sFileName = [System.IO.Path]::GetFileName($sWebURL)

# Concatenate the two values to prepare the download
$sFullFilePath = "$($sFileDirectory)$($sFileName)"

# Give a basic message to the user to let them know what we are doing
Write-Host "Downloading '$sWebURL' to '$sFullFilePath'"

# Download the file
$webclient = New-Object System.Net.WebClient
$webclient.DownloadFile($sWebURL,$sFullFilePath)

# Give a basic message to the user to let them know we are done
Write-Host "Download complete"

powershell -file DownloadFile.ps1

References:
http://windowsitpro.com/powershell/prompting-user-input-powershell
https://teusje.wordpress.com/2011/02/19/download-file-with-powershell/
http://stackoverflow.com/questions/5592531/how-to-pass-an-argument-to-a-powershell-script