Sample MODX Revolution Plugin for Binary Resources

OnBinaryResourceLoad

<?php
if ($modx->event->name == 'OnLoadWebDocument'
&&  $modx->resource->get('type') == 'document') {
    $mime = $modx->resource->get('contentType');

    $isBinary = $modx->getObject('modContentType', array('mime_type' => $mime))->get('binary');
    if ($isBinary == 1) {
        $bytes = base64_decode($modx->resource->get('content'));                
    }
    
// Inline Disposition is handled differently from Attachment
    $rArray = $modx->resource->toArray();
    $disposition = $rArray['content_dispo'];
    if ($disposiiton == 0) {
    // This must be handled explicitly (from here, that is)
        header('Content-Type: '. $mime);
        
    // Image-specific Handling
        if ($bytes && strpos($mime, 'image/') == 0) {
            $img = imagecreatefromstring($bytes);
            if ($img) {
                
            // Other Images: Add MIME type and handling
                switch($mime) {
                    case 'image/png':
                        imagesavealpha($img, true);
                        imagepng($img, NULL, 0, NULL);
                        break;
                }
                imagedestroy($img);
                
            // Stop MODX from mangling the output
                @session_write_close();
                exit;
            }
        }
        elseif ($bytes) {
            // ... typically, we'll just send back the binary data
        }
    }
    elseif ($bytes) {
        // ... typically, we'll just send back the binary data
    }
}