$baseURI = "https://upload.gridprotectionalliance.org/Upload/TEST"
$basePath = ""
$basePath = $(Resolve-Path -LiteralPath $basePath).Path

Get-ChildItem -LiteralPath $basePath -Recurse -File |
    ForEach-Object {
        $fileName = $_.Name
        
        $filePath = $_.FullName
        $folderPath = [System.IO.Path]::GetDirectoryName($filePath)
        Push-Location -LiteralPath $basePath
        $relativeFolderPath = Resolve-Path -LiteralPath $folderPath -Relative
        Pop-Location
        $uriPath = $relativeFolderPath.TrimStart('.', '\').Replace('\', '/')
        $uri = "$baseURI/$uriPath"
        
        $bytes = [System.IO.File]::ReadAllBytes($filePath)
        $encoding = [System.Text.Encoding]::GetEncoding("ISO-8859-1")
        $text = $encoding.GetString($bytes)
        $boundary = [System.Guid]::NewGuid().ToString()
        $LF = "`r`n"
        
        $bodyLines = (
            "--$boundary",
            "Content-Disposition: form-data; name=`"file`"; filename=`"$fileName`"",
            "Content-Type: application/octet-stream$LF",
            $text,
            "--$boundary--$LF"
        ) -join $LF
        
        Write-Host "Uploading `"$fileName`" to `"$uri`"..."
        Invoke-WebRequest -Uri $uri -Method Post -ContentType "multipart/form-data; boundary=`"$boundary`"" -Body $bodyLines
    }