Laravel 微信页面授权登陆

<?php

namespace App\Http\Middleware;

use EasyWeChat\Factory;
use App\User;
use Closure;

class WechatMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        // https://www.easywechat.com/docs/master/official-account/configuration
        $wechat_config = [
            'app_id'        => 'app_id',
            'secret'        => 'secret',
            'oauth'         => [
                'scopes'    => ['snsapi_userinfo'],
                'callback'  => '/',
            ]
        ];

        $app = Factory::officialAccount($wechat_config);

        $request->app = $app;

        // 通过 UA 来判断是否为微信内置浏览器访问，如果不是的话则返回一个测试号信息
        if(isset($_SERVER['HTTP_USER_AGENT'])
            && strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') === false
        ) {
            // 测试号 ID
            // $test_uid = 1;

            // session([
            //     'wechat_user' => User::find($test_uid)->toArray()
            // ]);

            // session()->save();

            return $next($request);
        }

        // $request->session()->flush();

        // 判断是否存在可以验证用户信息的 session
        if(session()->has('wechat_user')) {
            return $next($request);
        }

        $oauth = $app->oauth;

        // 通过 code state 这两个参数来判断是否为成功授权后跳转回来，也可以通过判断来源
        if(!$request->has(['code', 'state'])) {
            // 跳转到授权页面
            return  $oauth->setRequest($request)
                        ->redirect();
        }

        // 获取当前用户信息
        $user = $oauth->user();

        // 获取当前用户 openid
        $openid = $user->getId();

        $model =    User::where('openid', $openid)
                        ->first();

        if(!$model) {
            // 用户不存在需要注册
            $model              = new User;
            $model->nickname    = $user->getNickname();
            $model->openid      = $openid;
            $model->save();
        }

        session([
            'wechat_user' => $model->toArray()
        ]);

        session()->save();

        return redirect('/');
    }
}

protected $routeMiddleware = [
    ...
    'wechat' => \App\Http\Middleware\WechatMiddleware::class,
];

Route::get('/', function () {
    return view('welcome');
})->middleware('wechat');