Send base URL for my custom block

Question

In my Drupal 8 site, I am developing a custom block in my module custom, with some text and some images. I created a template, and everything works fine. Now I need to add some images for my custom block, and I don't know how to pass the base URL to call those images.

In Drupal 7 I used the following code.

function bloques_block_view($delta = '') {
    $block = array();

    $ruta = $GLOBALS['base_url'] . '/' . drupal_get_path("module", "mymodule");
    $link = $GLOBALS['base_url'] ;   

  switch ($delta) {

//footer
    case 'footer':
      $block['subject'] = '';
      $block['content'] = leer_template('footer.tpl', array('%ruta%' => $ruta, '%link%' => $link));
      break;
  }
  return $block;
}

Everything works well, but in Drupal 8 it is a little different. The problem comes with build().

    public function build() {
    $ruta = 'holamundo',        
    return array(
        '#theme' => 'mymodule',
        '#title' => 'my title ',
        '#ruta' => '<p>' . $ruta . '</p>'
    );

}

Just the title works in the template file; $ruta is not working.

  <h2>My Custom Block {{ title }}-{{ ruta }}</h2>

I don't know if this is the correct way to declare the base URL (just like I did in Drupal 7).

  $ruta = $GLOBALS['base_url'] . '/' . drupal_get_path("module", "bloques");

Answer 1

You can try template_preprocess_block(&$variables). There is a global $base_url variable. Create variable for block template:

function your_module_preprocess_block(&$variables){
  global $base_url;
  $variables['base_url'] = $base_url;

}

Now you can use {{base_url}} in twig template of your block.