function Get-Downloader {
param (
  [string]$url
 )

  $downloader = new-object System.Net.WebClient

  $defaultCreds = [System.Net.CredentialCache]::DefaultCredentials
  if ($defaultCreds -ne $null) {
    $downloader.Credentials = $defaultCreds
  }

  $ignoreProxy = $env:chocolateyIgnoreProxy
  if ($ignoreProxy -ne $null -and $ignoreProxy -eq 'true') {
    Write-Debug "Explicitly bypassing proxy due to user environment variable"
    $downloader.Proxy = [System.Net.GlobalProxySelection]::GetEmptyWebProxy()
  } else {
    # check if a proxy is required
    $explicitProxy = $env:chocolateyProxyLocation
    $explicitProxyUser = $env:chocolateyProxyUser
    $explicitProxyPassword = $env:chocolateyProxyPassword
    if ($explicitProxy -ne $null -and $explicitProxy -ne '') {
      # explicit proxy
      $proxy = New-Object System.Net.WebProxy($explicitProxy, $true)
      if ($explicitProxyPassword -ne $null -and $explicitProxyPassword -ne '') {
        $passwd = ConvertTo-SecureString $explicitProxyPassword -AsPlainText -Force
        $proxy.Credentials = New-Object System.Management.Automation.PSCredential ($explicitProxyUser, $passwd)
      }

      Write-Debug "Using explicit proxy server '$explicitProxy'."
      $downloader.Proxy = $proxy

    } elseif (!$downloader.Proxy.IsBypassed($url)) {
      # system proxy (pass through)
      $creds = $defaultCreds
      if ($creds -eq $null) {
        Write-Debug "Default credentials were null. Attempting backup method"
        $cred = get-credential
        $creds = $cred.GetNetworkCredential();
      }

      $proxyaddress = $downloader.Proxy.GetProxy($url).Authority
      Write-Debug "Using system proxy server '$proxyaddress'."
      $proxy = New-Object System.Net.WebProxy($proxyaddress)
      $proxy.Credentials = $creds
      $downloader.Proxy = $proxy
    }
  }

  return $downloader
}