更新，简化代码

Author: xutl

src/oauth/OAuth.php

@@ -8,7 +8,7 @@
 namespace xutl\wechat\oauth;
 
 use Yii;
-use yii\authclient\OAuth2;
+use xutl\authclient\WeChat;
 use yii\authclient\OAuthToken;
 
 /**
@@ -18,7 +18,7 @@
  * @author Tongle Xu <xutongle@gmail.com>
  * @since 1.0
  */
-class OAuth extends OAuth2
+class OAuth extends WeChat
 {
     /**
      * @inheritdoc
@@ -48,25 +48,8 @@ class OAuth extends OAuth2
     /**
      * @inheritdoc
      */
-    protected function defaultName()
-    {
-        return 'wechat';
-    }
-
-    /**
-     * @inheritdoc
-     */
-    protected function defaultTitle()
-    {
-        return Yii::t('app', 'Wechat');
-    }
-
-    /**
-     * 初始化组件
-     */
     public function init()
     {
-        parent::init();
         if (empty ($this->clientId)) {
             $this->clientId = Yii::$app->wechat->appId;
         }
@@ -76,6 +59,7 @@ public function init()
         if ($this->scope === null) {
             $this->scope = 'snsapi_userinfo';
         }
+        parent::init();
     }
 
     /**
@@ -98,8 +82,8 @@ public function buildAuthUrl(array $params = [])
     {
         $defaultParams = [
             'appid' => $this->clientId,
-            'redirect_uri' => $this->getReturnUrl(),
             'response_type' => 'code',
+            'redirect_uri' => $this->getReturnUrl(),
         ];
         if (!empty($this->scope)) {
             $defaultParams['scope'] = $this->scope;
@@ -113,96 +97,4 @@ public function buildAuthUrl(array $params = [])
         $authUrl = $this->composeUrl($this->authUrl, array_merge($defaultParams, $params));
         return $authUrl . '#wechat_redirect';
     }
-
-    /**
-     * Composes URL from base URL and GET params.
-     * @param string $url base URL.
-     * @param array $params GET params.
-     * @return string composed URL.
-     */
-    protected function composeUrl($url, array $params = [])
-    {
-        if (!empty($params)) {
-            if (strpos($url, '?') === false) {
-                $url .= '?';
-            } else {
-                $url .= '&';
-            }
-            $url .= http_build_query($params, '', '&', PHP_QUERY_RFC3986);
-        }
-        return $url;
-    }
-
-    /**
-     * @param \yii\httpclient\Request $request HTTP request instance.
-     * @param OAuthToken $accessToken access token instance.
-     */
-    public function applyAccessTokenToRequest($request, $accessToken)
-    {
-        $data = $request->getData();
-        $data['access_token'] = $accessToken->getToken();
-        $data['openid'] = $accessToken->getParam('openid');
-        $request->setData($data);
-    }
-
-    /**
-     * Applies client credentials (e.g. [[clientId]] and [[clientSecret]]) to the HTTP request instance.
-     * This method should be invoked before sending any HTTP request, which requires client credentials.
-     * @param \yii\httpclient\Request $request HTTP request instance.
-     * @since 2.1.3
-     */
-    protected function applyClientCredentialsToRequest($request)
-    {
-        $request->addData([
-            'appid' => $this->clientId,
-            'secret' => $this->clientSecret,
-        ]);
-    }
-
-    /**
-     * 返回OpenId
-     * @return mixed
-     */
-    public function getOpenId()
-    {
-        return $this->getAccessToken()->getParam('openid');
-    }
-
-    /**
-     * @inheritdoc
-     */
-    protected function initUserAttributes()
-    {
-        return $this->api('sns/userinfo', 'GET', [
-            //'lang'=>
-        ]);
-    }
-
-    /**
-     * Gets new auth token to replace expired one.
-     * @param OAuthToken $token expired auth token.
-     * @return OAuthToken new auth token.
-     * @throws \yii\authclient\InvalidResponseException
-     */
-    public function refreshAccessToken(OAuthToken $token)
-    {
-        $params = [
-            'grant_type' => 'refresh_token'
-        ];
-        $params = array_merge($token->getParams(), $params);
-
-        $request = $this->createRequest()
-            ->setMethod('POST')
-            ->setUrl($this->refreshTokenUrl)
-            ->setData($params);
-
-        $this->applyClientCredentialsToRequest($request);
-
-        $response = $this->sendRequest($request);
-
-        $token = $this->createToken(['params' => $response]);
-        $this->setAccessToken($token);
-
-        return $token;
-    }
 }