微信开放平台扫码登录功能

Author: lishipeng

src/WxApp.php

@@ -0,0 +1,89 @@
+<?php
+namespace lspbupt\wechat;
+use \Yii;
+use yii\caching\Cache;
+use yii\di\Instance;
+class WxApp extends \lspbupt\curl\CurlHttp
+{
+    public $appid = "";
+    public $appsecret = "";
+    public $host = "api.weixin.qq.com";
+    public $protocol = "https";
+    public $redirectUrl = "";
+    public $cache = 'cache';
+    const WX_CACHEKEY = "wxapp_cachekey";
+
+    public function init()
+    {
+        parent::init();
+        $this->cache = Instance::ensure($this->cache, Cache::className());
+        $this->beforeRequest = function($params, $curlhttp) {
+            $action = $curlhttp->getAction();
+            if($action != "/sns/oauth2/access_token") {
+                $ch = clone $curlhttp;
+                $token = $ch->getTokenFromCache();
+                if(strpos($action, "?") != 0) {
+                    $curlhttp->setAction($action."&access_token=".$token);
+                } else {
+                    $curlhttp->setAction($action."?access_token=".$token);
+                }
+            }
+            return $params; 
+        };
+        $this->afterRequest = function($output, $curlhttp) {
+            $data = json_decode($output, true);
+            if(empty($output) || empty($data)) {
+                $data = [
+                    'errcode' => 1,
+                    'errmsg' => '网络错误!',
+                ]; 
+            }
+            if(empty($data['errcode'])) {
+                $data = [
+                    'errcode' => 0,
+                    'errmsg' => '请求成功',
+                    'data' => $data,
+                ];
+            }
+            return $data;
+        };
+    }
+
+    public function getToken($code, $grantType="authorization_code")
+    {
+        $data = $this->setGet()->httpExec("/sns/oauth2/access_token", [
+            'appid' => $this->appid,
+            'secret' => $this->appsecret,
+            'code' => $code,
+            'grant_type' => $grantType,
+        ]);
+        if($data['errcode']) {
+            return $data;
+        }
+        $ts = time();
+        $token = $data['data']['access_token'];
+        $tempData = [
+            'token' => $token,
+            'expire' => $data['data']['expires_in'] + $ts - 100
+        ];
+        Yii::$app->session->set(self::WX_CACHEKEY.$this->appid, $tempData);
+        return $data;
+    }
+
+    public function getTokenFromCache($code = "", &$data = [], $grantType = "authorization_code")
+    {
+        $tempData = Yii::$app->session->get(self::WX_CACHEKEY.$this->appid, "");
+        $ts = time();
+        if($tempData && $tempData['expire'] > $ts) {
+            return $tempData['token'];
+        }
+        return "";
+    }
+
+    public function getUserInfo($openid)
+    {
+        $params = ['openid' => $openid];
+        return $this->setGet()->httpExec("/sns/userinfo", $params);
+    }
+
+}

src/assets/WxappLoginAsset.php

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+<?php
+namespace lspbupt\wechat\assets;
+
+use yii\web\AssetBundle;
+class WxappLoginAsset extends AssetBundle
+{
+    public $js = [
+        '//res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js',
+    ];
+}

src/widgets/JsWxappLogin.php

@@ -0,0 +1,50 @@
+<?php
+namespace lspbupt\wechat\widgets;
+use \Yii;
+use yii\base\Widget;
+use yii\web\JsExpression;
+use yii\base\InvalidConfigException;
+use lspbupt\wechat\WxApp;
+use lspbupt\wechat\assets\WxappLoginAsset;
+class JsWxappLogin extends Widget
+{
+    public $debug = false;
+    public $wxApp = 'wxapp';
+    public $id = 'login_container';
+    public $scope = 'snsapi_login';
+    public $redirect_uri = ''; 
+    public $state = '';
+    public $style = 'black';
+    public $href = '';
+
+    public function init()
+    {
+        if (is_string($this->wxApp)) {
+            $this->wxApp = Yii::$app->get($this->wxApp);
+        } elseif (is_array($this->wxApp)) {
+            if (!isset($this->wxApp['class'])) {
+                $this->wxApp['class'] = WxApp::className();
+            }
+            $this->wxApp = Yii::createObject($this->wxApp);
+        }
+        if (!$this->wxApp instanceof WxApp) {
+            throw new InvalidConfigException("微信配置错误");
+        }
+    }
+
+    public function run()
+    {
+        $view = $this->getView();
+        WxappLoginAsset::register($view);
+        $js = 'var obj = new WxLogin({
+            id:"'.$this->id.'", 
+            appid: "'.$this->wxApp->appid.'", 
+            scope: "'.$this->scope.'", 
+            redirect_uri: "'.$this->redirect_uri.'",
+            state: "'.$this->state.'",
+            style: "'.$this->style.'",
+            href: "'.$this->href.'"
+        }); ';
+        $view->registerJs($js);
+    }
+}