Drupal 8 creare link html da file id (fid)

Per i nostalgici di Drupal 7 che hanno provato disperatamente a districarsi tra le varie classi introdotte in Drupal 8, ebbene sappiate che:

  1. per quello che può servire, godete della mia solidarietà
  2. dopo varie peripezie sono riuscito ad ottenere un codice utile a generare il famigerato html

Ecco il codice di esempio testato su Drupal 8.5.x

use Drupal\file\Entity\File;
use Drupal\Core\Link;
use Drupal\Core\Url;

$fid = 123; // <- your file id here

$uri = File::load($fid)->getFileUri();
$url = Url::fromUri(file_create_url($uri));
$link = Link::fromTextAndUrl('somestring', $url);
$link = $link->toRenderable();

print render($link); // <- this is HTML!!! YEAH!

spero che questo codice vi sia di aiuto.

Fatemi sapere, nei commenti, se questa cosa vi risolve il problema.

File managed entire folder Drupal

Some information on managed and unmanaged files in Drupal

If a file is on a certain folder of the webserver within the Drupal folders it does not mean that Drupal knows it!

When Drupal “store” the presence of a certain file (i.e. public://myfile.pdf) it became a managed file.

You can add a file to managed with file_save_data function.

Luckly or unfortunaly a function that manage an entire directory of files, maybe in a recursive way, is not present in Drupal core.

How to import a folder of files to Drupal?

I create a script to this in a clean and easy way.

  $destination = 'public://path-to-folder';
  $regex = '/.*\.jpg$/'; // This will identify jpg files

  $paths = file_scan_directory($destination,$regex);
  foreach($paths as $path => $data){
    $realPath = drupal_realpath($path);
    $handle = fopen($realPath, 'r');
    $file = file_save_data($handle, $path, FILE_EXISTS_REPLACE);

Note that dpm function is provided with a contrib module: Devel.


I have used this functionality to put lots of images in the media library (made with Media module) and make them available for redactors.

Drupal 7 blocks external frame due to X-Frame-Options

As documented (https://www.drupal.org/node/2735873) Drupal comunity removed the possibility to embedd a Drupal site into an external frame to avoid clickjacking.

The problem

Basically you can not put an external Drupal website into an iFrame anymore, if you try to embedd a website with X-Frame-Options restrictions you will get a browser console error stating something like this

because it set ‘X-Frame-Options’ to ‘sameorigin’

This behavior is obtained in drupal_deliver_html_page (in common.inc) in which it is checked what I show you below:

// By default, do not allow the site to be rendered in an iframe on another
// domain, but provide a variable to override this. If the code running for
// this page request already set the X-Frame-Options header earlier, don't
// overwrite it here.
$frame_options = variable_get('x_frame_options', 'SAMEORIGIN');
if ($frame_options && is_null(drupal_get_http_header('X-Frame-Options'))) {
  drupal_add_http_header('X-Frame-Options', $frame_options);

To see your Drupal website displayed into a frame of an external website you must change X-Frame-Options (or remove it).

The solution

Although Drupal documentation (https://www.drupal.org/node/2735873) explains that you can remove the X-Frame-Options header via the page_alter, I discovered that under certain conditions this strategy does not work at all.

In my case I was able to surf the site from a Frame only if I was logged in with an active session.

To achieve a better solution, my suggestion is to modify the Drupal variable x_frame_options before the drupal_deliver_html_page is called.
I did this (and it works like charme) via page_delivery_callback_alter, where I set the variable to FALSE under certain satisfited conditions (i.e. the page is requested from a whitelist domain).

function MYMODULENAME_page_delivery_callback_alter(&$delivery_callback) {
  $domains = variable_get('ur_com_xframe_allowed',array('http://www.myalloweddomain.xxx/'));
  //removing frameset limitation for certain referrers
    //setting the variable to false in order to avoid a future setting of the header
    variable_set('x_frame_options', FALSE);
  } else {
    //default behavior
    variable_set('x_frame_options', 'SAMEORIGIN');

Hope this help.