Recursively retrieve the files and folders from a remote resource.

Get-RemoteItem.ps1

<#
.SYNOPSIS
Recursively retrieve the files and folders from a remote resource.

.PARAMETER Uri
The URI of the remote item.

.PARAMETER Destination
The path to folder that will contain the files and folders that are fetched from the Uri.  Default: ~/Downloads

.EXAMPLE
Get-RemoteItem -Uri 'https://physionet.org/files/deid/1.1/'

Gets the files and folders from resource and saves them to ~/Downloads
#>
function Get-RemoteItem
{
    [CmdletBinding()]
    param (
        [Parameter(Position=0)]
        [uri]$Uri,

        [Parameter(Position=1)]
        [string]$Destination = "$env:USERPROFILE\Downloads"
    )

    Write-Verbose "Requesting $Uri..."
    $Response = Invoke-WebRequest -Uri $Uri.AbsoluteUri

    # it's a file
    if ($Response.Links.Count -eq 0) 
    {
        $FilePath = Join-Path -Path $Destination -ChildPath ("{0}{1}" -f $Uri.Host, $Uri.LocalPath)
        Write-Debug "FilePath: $FilePath"

        $Parent = Split-Path $FilePath -Parent
        if ( $False -eq (Test-Path $Parent) )
        {
            Write-Verbose "Creating directory: $Parent..."
            New-Item -ItemType Directory -Path $Parent -Force
        }

        Write-Verbose "Saving file $FilePath..."
        $Response.Content | Out-File -FilePath $FilePath -Force
    }

    # it's a directory
    else
    {
        # skip parent directory (../)
        $Response.Links | Where-Object { $_.href -ne '../' } | ForEach-Object {
            Write-Debug "href: $( $_.href )"
            Get-RemoteItem "$Uri$($_.href)" $Destination
        }
    }

}