如何实现Yii2中OAuth扩展及QQ互联登录？

'components' => [
 'authClientCollection' => [
 'class' => 'yii\authclient\Collection',
 'clients' => [
 'google' => [
 'class' => 'yii\authclient\clients\GoogleOpenId'
 ],
 'facebook' => [
 'class' => 'yii\authclient\clients\Facebook',
 'clientId' => 'facebook_client_id',
 'clientSecret' => 'facebook_client_secret',
 ],
 ],
 ]
 ...
]

class SiteController extends Controller
{
 public function actions()
 {
 return [
 'auth' => [
 'class' => 'yii\authclient\AuthAction',
 'successCallback' => [$this, 'successCallback'],
 ],
 ]
 }
 public function successCallback($client)
 {
 $attributes = $client->getUserAttributes();
 // user login or signup comes here
 }
}

<?= yii\authclient\widgets\AuthChoice::widget([
 'baseAuthUrl' => ['site/auth']
])?>

<?php
namespace common\components;
use yii\authclient\OAuth2;
use yii\base\Exception;
use yii\helpers\Json;
/**
 *
 * ~~~
 * 'components' => [
 * 'authClientCollection' => [
 * 'class' => 'yii\authclient\Collection',
 * 'clients' => [
 * 'qq' => [
 *  'class' => 'common\components\QqOAuth',
 *  'clientId' => 'qq_client_id',
 *  'clientSecret' => 'qq_client_secret',
 * ],
 * ],
 * ]
 * ...
 * ]
 * ~~~
 *
 * @see http://connect.qq.com/
 *
 * @author easypao <admin@easypao.com>
 * @since 2.0
 */
class QqOAuth extends OAuth2
{
 public $authUrl = 'https://graph.qq.com/oauth2.0/authorize';
 public $tokenUrl = 'https://graph.qq.com/oauth2.0/token';
 public $apiBaseUrl = 'https://graph.qq.com';
 public function init()
 {
 parent::init();
 if ($this->scope === null) {
 $this->scope = implode(',', [
 'get_user_info',
 ]);
 }
 }
 protected function initUserAttributes()
 {
 $openid = $this->api('oauth2.0/me', 'GET');
 $qquser = $this->api("user/get_user_info", 'GET', ['oauth_consumer_key'=>$openid['client_id'], 'openid'=>$openid['openid']]);
 $qquser['openid']=$openid['openid'];
 return $qquser;
 }
 protected function defaultName()
 {
 return 'qq';
 }
 protected function defaultTitle()
 {
 return 'Qq';
 }
 /**
 * 该扩展初始的处理方法似乎QQ互联不能用，应此改写了方法
 * @see \yii\authclient\BaseOAuth::processResponse()
 */
 protected function processResponse($rawResponse, $contentType = self::CONTENT_TYPE_AUTO)
 {
  if (empty($rawResponse)) {
   return [];
  }
  switch ($contentType) {
   case self::CONTENT_TYPE_AUTO: {
    $contentType = $this->determineContentTypeByRaw($rawResponse);
    if ($contentType == self::CONTENT_TYPE_AUTO) {
  //以下代码是特别针对QQ互联登录的，也是与原方法不一样的地方 
     if(strpos($rawResponse, "callback") !== false){
      $lpos = strpos($rawResponse, "(");
      $rpos = strrpos($rawResponse, ")");
      $rawResponse = substr($rawResponse, $lpos + 1, $rpos - $lpos -1);
      $response = $this->processResponse($rawResponse, self::CONTENT_TYPE_JSON);
      break;
     }
  //代码添加结束
     throw new Exception('Unable to determine response content type automatically.');
    }
    $response = $this->processResponse($rawResponse, $contentType);
    break;
   }
   case self::CONTENT_TYPE_JSON: {
    $response = Json::decode($rawResponse, true);
    if (isset($response['error'])) {
     throw new Exception('Response error: ' . $response['error']);
    }
    break;
   }
   case self::CONTENT_TYPE_URLENCODED: {
    $response = [];
    parse_str($rawResponse, $response);
    break;
   }
   case self::CONTENT_TYPE_XML: {
    $response = $this->convertXmlToArray($rawResponse);
    break;
   }
   default: {
    throw new Exception('Unknown response type "' . $contentType . '".');
   }
  }
  return $response;
 }
}

'components' => [
 'authClientCollection' => [
  'class' => 'yii\authclient\Collection',
  'clients' => [
   'qq' => [
   'class'=>'common\components\QqOAuth',
   'clientId'=>'your_qq_clientid',
   'clientSecret'=>'your_qq_secret'
  ],
  ],
 ]
]

public function successCallback($client)
{
 $attributes = $client->getUserAttributes();
 // 用户的信息在$attributes中，以下是您根据您的实际情况增加的代码
 // 如果您同时有QQ互联登录，新浪微博等，可以通过 $client->id 来区别。
}

<a href="/site/auth?authclient=qq">使用QQ快速登录</a>