Форум

<?
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/header.php");
$APPLICATION->SetTitle("TEST: ui.viewer");
CJSCore::Init([ 'ui.viewer' ]);
?>
<pre>TEST: ui.viewer</pre>

    <span class="disk-detail-sidebar-editor-item disk-detail-sidebar-editor-item-show"
          id="bx-disk-filepage-filename"
          data-viewer=""
          data-viewer-type="document"
          data-src="/disk/downloadFile/91235/?&ncc=1&filename=test-name.pdf"
          data-object-id="91235"
          data-title="test-name.pdf"
          data-actions="[{&quot;type&quot;:&quot;download&quot;}]"
    >Просмотреть</span>

<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/footer.php");?>

<?$APPLICATION->IncludeComponent(    "bitrix:pdf.viewer",
    "",
    Array(
        "HEIGHT" => "600",
        "IFRAME" => "N",
        "PATH" => "/upload/ISR6bMnaRq.pdf",
        "PRINT" => "N",
        "PRINT_URL" => "",
        "TITLE" => "",
        "VIEWER_ID" => "",
        "WIDTH" => "900"
    )
);?>

<? CJSCode::Init([ 'ui.viewer' ]); ?>
<button
   class="ui-btn ui-btn-link"
   data-viewer="null"
   data-object-id="1234"
   data-viewer-type="document"
   data-src="'/disk/downloadFile/1234/?&ncc=1&filename=ИмяФайла.pdf'"
   data-title="ИмяФайла.pdf"
   data-actions="[{"type":"download"}]"
>ОТКРЫТЬ ФАЙЛ</button>

    if ( $template !== null ) {
       $file = Bitrix\Main\Application::getDocumentRoot() . '/upload/' . $template->getFile()['SUBDIR'] . '/' . $template->getFile()['FILE_NAME'];
    }
    else
       exit();

    if ( $template !== null ) {
       $filePath = Bitrix\Main\Application::getDocumentRoot() . '/upload/' 
       . $template->getFile()['SUBDIR'] . '/' . $template->getFile()['FILE_NAME'];
       $file = new Bitrix\Main\IO\File( $filePath );
    }
    else
       exit();