s3fs_cors.module in S3 File System CORS Upload 8

Allow uploading of files directly to AmazonS3 via the browser using CORS.

File

s3fs_cors.module

<?php

/**
 * @file
 * Allow uploading of files directly to AmazonS3 via the browser using CORS.
 */
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Site\Settings;
use Drupal\field\FieldConfigInterface;

/**
 * Implements hook_help().
 */
function s3fs_cors_help($path, $arg) {
  if ($path == 'admin/config/media/s3fs/cors') {
    $msg = t("Configure your S3 Bucket's CORS configuration from this page.\n      Please be aware that submitting this form will <b>overwrite</b> your bucket's current CORS config.<br>\n      So if you intend to configure your bucket's CORS policy manually, <b>never submit this form</b>.");
    return "<p>{$msg}</p>";
  }
}

/**
 * Implements hook_field_info_alter().
 *
 * Use a custom class to override the file field class by extending it to allow
 * larger file sizes when the upload is to AWS S3. Images are not being treated
 * similarly at this time.
 */
function s3fs_cors_field_info_alter(array &$info) {

  // Override the default file field class with a custom version.
  $info['file']['class'] = '\\Drupal\\s3fs_cors\\Plugin\\Field\\FieldType\\S3fsCorsFileItem';
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Remove the S3 Cors widget option from file or image fields that are not
 * using S3 storage.
 */
function s3fs_cors_form_entity_form_display_edit_form_alter(&$form, FormStateInterface $form_state) {
  $entity_type = $form['#entity_type'];
  $bundle = $form['#bundle'];
  $entityManager = Drupal::service('entity_field.manager');
  $field_definitions = $entityManager
    ->getFieldDefinitions($entity_type, $bundle);
  $s3_public = Settings::get('s3fs.use_s3_for_public');
  $s3_private = Settings::get('s3fs.use_s3_for_private');
  foreach ($form['#fields'] as $field) {
    $field_definition = $field_definitions[$field];
    if ($field_definition instanceof FieldConfigInterface) {

      /** @var \Drupal\field\Entity\FieldConfig $field_definition */
      $field_type = $field_definition
        ->get('field_type');
      if ($field_type == 'file' || $field_type == 'image') {

        /** @var \Drupal\field\Entity\FieldStorageConfig $field_storage */
        $field_storage = $field_definition
          ->getFieldStorageDefinition();
        $uri_scheme = $field_storage
          ->getSetting('uri_scheme');
        if ($uri_scheme == 's3' || $uri_scheme == 'public' && $s3_public || $uri_scheme == 'private' && $s3_private) {
          continue;
        }
        $widget = 's3fs_cors_' . $field_type . '_widget';
        unset($form['fields'][$field]['plugin']['type']['#options'][$widget]);
      }
    }
  }
}

Functions

Name	Description
s3fs_cors_field_info_alter	Implements hook_field_info_alter().
s3fs_cors_form_entity_form_display_edit_form_alter	Implements hook_form_FORM_ID_alter().
s3fs_cors_help	Implements hook_help().