Tag: drupal

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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.

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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, $path, FILE_EXISTS_REPLACE);
    fclose($handle);
    if(!$file){
      dpm('ERROR');
    }
    else{
      dpm("YEAH!!");
      dpm($file);
    }
  }

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

Hint

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

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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) {
  $domains = variable_get('ur_com_xframe_allowed',array('http://www.myalloweddomain.xxx/'));
  //removing frameset limitation for certain referrers
  if(in_array($_SERVER['HTTP_REFERER'],$domains)){
    //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.

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