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diff --git a/web/modules/contrib/libraries/src/Plugin/libraries/Locator/UriLocator.php b/web/modules/contrib/libraries/src/Plugin/libraries/Locator/UriLocator.php
new file mode 100644
index 000000000..348be0c24
--- /dev/null
+++ b/web/modules/contrib/libraries/src/Plugin/libraries/Locator/UriLocator.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace Drupal\libraries\Plugin\libraries\Locator;
+
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
+use Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface;
+use Drupal\libraries\ExternalLibrary\Local\LocatorInterface;
+use Drupal\libraries\Plugin\MissingPluginConfigurationException;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a locator utilizing a URI.
+ *
+ * It makes the following assumptions:
+ * - The library files can be accessed using a specified stream.
+ * - The stream wrapper is local (i.e. it is a subclass of
+ *   \Drupal\Core\StreamWrapper\LocalStream).
+ * - The first component of the file URIs are the library IDs (i.e. file URIs
+ *   are of the form: scheme://library-id/path/to/file/filename).
+ *
+ * @Locator("uri")
+ *
+ * @see \Drupal\libraries\ExternalLibrary\Local\LocatorInterface
+ */
+class UriLocator implements LocatorInterface, ContainerFactoryPluginInterface {
+
+  /**
+   * The stream wrapper manager.
+   *
+   * @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface
+   */
+  protected $streamWrapperManager;
+
+  /**
+   * The URI to check.
+   *
+   * @var string
+   */
+  protected $uri;
+
+  /**
+   * Constructs a URI locator.
+   *
+   * @param \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface $stream_wrapper_manager
+   *   The stream wrapper manager.
+   * @param string $uri
+   *   The URI to check.
+   */
+  public function __construct(StreamWrapperManagerInterface $stream_wrapper_manager, $uri) {
+    $this->streamWrapperManager = $stream_wrapper_manager;
+    $this->uri = (string) $uri;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    if (!isset($configuration['uri'])) {
+      throw new MissingPluginConfigurationException($plugin_id, $plugin_definition, $configuration, 'uri');
+    }
+    return new static($container->get('stream_wrapper_manager'), $configuration['uri']);
+  }
+
+  /**
+   * Locates a library.
+   *
+   * @param \Drupal\libraries\ExternalLibrary\Local\LocalLibraryInterface $library
+   *   The library to locate.
+   *
+   * @see \Drupal\libraries\ExternalLibrary\Local\LocatorInterface::locate()
+   */
+  public function locate(LocalLibraryInterface $library) {
+    /** @var \Drupal\Core\StreamWrapper\LocalStream $stream_wrapper */
+    $stream_wrapper = $this->streamWrapperManager->getViaUri($this->uri);
+    assert('$stream_wrapper instanceof \Drupal\Core\StreamWrapper\LocalStream');
+    // Calling LocalStream::getDirectoryPath() explicitly avoids the realpath()
+    // usage in LocalStream::getLocalPath(), which breaks if Libraries API is
+    // symbolically linked into the Drupal installation.
+    list($scheme, $target) = explode('://', $this->uri, 2);
+    $base_path = str_replace('//', '/', $stream_wrapper->getDirectoryPath() . '/' . $target . '/' . $library->getId());
+    if (is_dir($base_path) && is_readable($base_path)) {
+      $library->setLocalPath($base_path);
+      return;
+    }
+    $library->setUninstalled();
+  }
+
+}