$Cookies = New-Object System.Net.CookieContainer
   if($SessionVariableName) {
      $Cookies = Get-Variable $SessionVariableName -Scope 1
   }
   $request.CookieContainer = $Cookies
   if($SessionVariableName) {
      Set-Variable $SessionVariableName -Scope 1 -Value $Cookies
   }

   try {
      $res = $request.GetResponse();
   } catch [System.Net.WebException] {
      Write-Error $_.Exception -Category ResourceUnavailable
      return
   } catch {
      Write-Error $_.Exception -Category NotImplemented
      return
   }

   if((Test-Path variable:res) -and $res.StatusCode -eq 200) {
      if($fileName -and !(Split-Path $fileName)) {
         $fileName = Join-Path (Convert-Path (Get-Location -PSProvider "FileSystem")) $fileName
      }
      elseif((!$Passthru -and !$fileName) -or ($fileName -and (Test-Path -PathType "Container" $fileName)))
      {
         [string]$fileName = ([regex]'(?i)filename=(.*)$').Match( $res.Headers["Content-Disposition"] ).Groups[1].Value
         $fileName = $fileName.trim("\/""'")

         $ofs = ""
         $fileName = [Regex]::Replace($fileName, "[$([Regex]::Escape(""$([System.IO.Path]::GetInvalidPathChars())$([IO.Path]::AltDirectorySeparatorChar)$([IO.Path]::DirectorySeparatorChar)""))]", "_")
         $ofs = " "

         if(!$fileName) {
            $fileName = $res.ResponseUri.Segments[-1]
            $fileName = $fileName.trim("\/")
            if(!$fileName) {
               $fileName = Read-Host "Please provide a file name"
            }
            $fileName = $fileName.trim("\/")
            if(!([IO.FileInfo]$fileName).Extension) {
               $fileName = $fileName + "." + $res.ContentType.Split(";")[0].Split("/")[1]
            }
         }
         $fileName = Join-Path (Convert-Path (Get-Location -PSProvider "FileSystem")) $fileName
      }
      if($Passthru) {
         $encoding = [System.Text.Encoding]::GetEncoding( $res.CharacterSet )
         [string]$output = ""
      }

      [int]$goal = $res.ContentLength
      $reader = $res.GetResponseStream()
      if($fileName) {
         try {
            $writer = new-object System.IO.FileStream $fileName, "Create"
         } catch {
            Write-Error $_.Exception -Category WriteError
            return
         }
      }
      [byte[]]$buffer = new-object byte[] 4096
      [int]$total = [int]$count = 0
      do
      {
         $count = $reader.Read($buffer, 0, $buffer.Length);
         if($fileName) {
            $writer.Write($buffer, 0, $count);
         }
         if($Passthru){
            $output += $encoding.GetString($buffer,0,$count)
         } elseif(!$quiet) {
            $total += $count
            if($goal -gt 0) {
               Write-Progress "Downloading $Uri" "Saving $total of $goal" -id 0 -percentComplete (($total/$goal)*100)
            } else {
               Write-Progress "Downloading $Uri" "Saving $total bytes..." -id 0
            }
         }
      } while ($count -gt 0)

      $reader.Close()
      if($fileName) {
         $writer.Flush()
         $writer.Close()
      }
      if($Passthru){
         $output
      }
   }
   if(Test-Path variable:res) { $res.Close(); }
   if($fileName) {
      ls $fileName
   }
}