Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/update/src/UpdateFetcher.php

@@ -0,0 +1,125 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\update\UpdateFetcher.
+ */
+
+namespace Drupal\update;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\DependencyInjection\DependencySerializationTrait;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\RequestException;
+
+/**
+ * Fetches project information from remote locations.
+ */
+class UpdateFetcher implements UpdateFetcherInterface {
+
+  use DependencySerializationTrait;
+
+  /**
+   * URL to check for updates, if a given project doesn't define its own.
+   */
+  const UPDATE_DEFAULT_URL = 'http://updates.drupal.org/release-history';
+
+  /**
+   * The fetch url configured in the update settings.
+   *
+   * @var string
+   */
+  protected $fetchUrl;
+
+  /**
+   * The update settings
+   *
+   * @var \Drupal\Core\Config\Config
+   */
+  protected $updateSettings;
+
+  /**
+   * The HTTP client to fetch the feed data with.
+   *
+   * @var \GuzzleHttp\ClientInterface
+   */
+  protected $httpClient;
+
+  /**
+   * Constructs a UpdateFetcher.
+   *
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory.
+   * @param \GuzzleHttp\ClientInterface $http_client
+   *   A Guzzle client object.
+   */
+  public function __construct(ConfigFactoryInterface $config_factory, ClientInterface $http_client) {
+    $this->fetchUrl = $config_factory->get('update.settings')->get('fetch.url');
+    $this->httpClient = $http_client;
+    $this->updateSettings = $config_factory->get('update.settings');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function fetchProjectData(array $project, $site_key = '') {
+    $url = $this->buildFetchUrl($project, $site_key);
+    $data = '';
+    try {
+      $data = (string) $this->httpClient
+        ->get($url, array('headers' => array('Accept' => 'text/xml')))
+        ->getBody();
+    }
+    catch (RequestException $exception) {
+      watchdog_exception('update', $exception);
+    }
+    return $data;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildFetchUrl(array $project, $site_key = '') {
+    $name = $project['name'];
+    $url = $this->getFetchBaseUrl($project);
+    $url .= '/' . $name . '/' . \Drupal::CORE_COMPATIBILITY;
+
+    // Only append usage information if we have a site key and the project is
+    // enabled. We do not want to record usage statistics for disabled projects.
+    if (!empty($site_key) && (strpos($project['project_type'], 'disabled') === FALSE)) {
+      // Append the site key.
+      $url .= (strpos($url, '?') !== FALSE) ? '&' : '?';
+      $url .= 'site_key=';
+      $url .= rawurlencode($site_key);
+
+      // Append the version.
+      if (!empty($project['info']['version'])) {
+        $url .= '&version=';
+        $url .= rawurlencode($project['info']['version']);
+      }
+
+      // Append the list of modules or themes enabled.
+      $list = array_keys($project['includes']);
+      $url .= '&list=';
+      $url .= rawurlencode(implode(',', $list));
+    }
+    return $url;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFetchBaseUrl($project) {
+    if (isset($project['info']['project status url'])) {
+      $url = $project['info']['project status url'];
+    }
+    else {
+      $url = $this->fetchUrl;
+      if (empty($url)) {
+        $url = static::UPDATE_DEFAULT_URL;
+      }
+    }
+    return $url;
+  }
+
+}