Laravel中使用google/apiclient单次请求推送通知至多设备

我已经在Laravel项目中集成了google/apiclient，需要实现单次请求向多个设备发送FCM推送通知，不想用foreach循环为每个设备token单独创建请求。现有单设备推送代码和循环推送的代码，但循环方式会产生大量请求，求更优的解决方案。

单设备推送代码 #

$notification = new Notification([
   'title' => $data['title'],
   'body' => $data['message']
]);

$message = new Message([
   'notification' => $notification,
   'data' => $data,
    'token' => $token
]);

$request = new FirebaseCloudMessaging\SendMessageRequest();
$request->setMessage($message);

$messaging = new FirebaseCloudMessaging($this->client);
$response = $messaging->projects_messages->send('projects/my-project', $request);

不推荐的循环推送方式 #

foreach ($tokens as $token){
    $message = new Message([
        'notification' => $notification,
        'data' => $data,
        'token' => $token
    ]);
    $request = new FirebaseCloudMessaging\SendMessageRequest();
    $request->setMessage($message);
    $messaging = new FirebaseCloudMessaging($this->client);
    $response = $messaging->projects_messages->send('projects/my-project', $request);
}

解决方案：使用FCM Multicast消息（单次请求推多设备） #

FCM官方支持通过tokens参数批量传入设备token数组，实现单次请求推送至多个设备，具体修改如下：

修改后的代码 #

$notification = new Notification([
    'title' => $data['title'],
    'body' => $data['message']
]);

// 用tokens参数替代单个token，传入多设备token数组
$message = new Message([
    'notification' => $notification,
    'data' => $data,
    'tokens' => $tokens // 这里传入你的设备token数组
]);

$request = new FirebaseCloudMessaging\SendMessageRequest();
$request->setMessage($message);

$messaging = new FirebaseCloudMessaging($this->client);
// 单次请求完成多设备推送
$response = $messaging->projects_messages->send('projects/my-project', $request);

注意事项 #

• 单次Multicast消息最多支持500个设备token，如果你的token数组长度超过500，需要用array_chunk分割成每500个一组，再循环发送每组（每组仍是单次请求）：

  $tokenGroups = array_chunk($tokens, 500);
  foreach ($tokenGroups as $group) {
      $message = new Message([
          'notification' => $notification,
          'data' => $data,
          'tokens' => $group
      ]);
      $request = new FirebaseCloudMessaging\SendMessageRequest();
      $request->setMessage($message);
      $response = $messaging->projects_messages->send('projects/my-project', $request);
      // 可在此处理每组的推送结果
  }
  

• 推送响应中会包含每个设备的推送状态，可解析$response来排查无效token或推送失败的情况。

内容的提问来源于stack exchange，提问作者Shriyank