# https://www.xwiki.org/xwiki/bin/view/Documentation/AdminGuide/Authentication/
# Authenticate like: username:password@url and add &basicauth=1 at the end

# Setup Credentials and Encode them
$Username = "DigitalData"
$Password = "35452dd!"
$CredentialsPair = "$($Username):$($Password)"
$EncodedCredentials = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes($CredentialsPair))

# Create Request Header for Basic Authenticastion
$Headers = @{ Authorization = "Basic $EncodedCredentials" }

# Set the url
$Url = "http://wiki.dd/xwiki11/bin/export/XWiki/XWikiPreferences?editor=globaladmin&section=Export"
$Path = "E:\backup.xar"

Write-Host "Downloading Backup from [$($url)].."

# Make the request
$Response = Invoke-WebRequest -Method Get -Uri $Url -Headers $Headers

Write-Host "Download finished!"

# Write the reponse to disk
Write-Host "Streaming file to [$($Path)].."

try {
    [System.IO.File]::WriteAllBytes($Path, $Response.Content)
} catch {
    Write-Host "An error occurred:"
    Write-Host $_
} finally {
    $Stream.Dispose()
}

Write-Host "Done!"