ability to use external yii2-httpclient object

ReCaptchaValidator.php

@@ -10,7 +10,8 @@
 use Yii;
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
-use yii\httpclient\Client;
+use yii\httpclient\Client as HttpClient;
+use yii\httpclient\Request as HttpClientRequest;
 use yii\validators\Validator;
 
 /**
@@ -32,6 +33,9 @@ class ReCaptchaValidator extends Validator
     /** @var string */
     public $uncheckedMessage;
 
+    /** @var \yii\httpclient\Request */
+    public $httpClientRequest;
+
     /** @var boolean */
     protected $isValid = false;
 
@@ -49,6 +53,10 @@ public function init()
             }
         }
 
+        if (empty($this->httpClientRequest) || !($this->httpClientRequest instanceof HttpClientRequest)) {
+            $this->httpClientRequest = (new HttpClient())->createRequest();
+        }
+
         if ($this->message === null) {
             $this->message = Yii::t('yii', 'The verification code is incorrect.');
         }
@@ -107,9 +115,7 @@ protected function validateValue($value)
      */
     protected function getResponse($value)
     {
-        $client = new Client();
-        /** @var yii\httpclient\Response $response */
-        $response = $client->createRequest()
+        $response = $this->httpClientRequest
             ->setMethod('GET')
             ->setUrl(self::SITE_VERIFY_URL)
             ->setData(['secret' => $this->secret, 'response' => $value, 'remoteip' => Yii::$app->request->userIP])