lianjie_admin/app/Http/Middleware/WechatAuth.php

<?php

namespace App\Http\Middleware;

use App\Models\v3\User;
use Closure;
use EasyWeChat\Factory;
use Exception;
use Illuminate\Http\Request;

class WechatAuth
{
    /**
     * Handle an incoming request.
     *
     * @param Request $request
     * @param Closure $next
     * @return mixed
     * @throws Exception
     */
    public function handle(Request $request, Closure $next)
    {
        $sessionKey = 'wechat_user';
        $user = $request->session()->get($sessionKey);
        if (!$user) {
            $config = config('wechat.official_account.default');
            $app = Factory::officialAccount($config);

            $code = $request->input('code');
            if (empty($code)) {
                return $app->oauth->scopes(['snsapi_userinfo'])->redirect($request->url());
            } else {
                $wechatUser = $app->oauth->user();
                if (!$wechatUser) {
                    throw new \Exception('获取用户信息失败');
                } else if (empty($user->unionid)) {
                    # TODO 调试unionid
                    if (config('app.debug') && $request->server('REMOTE_ADDR') == '127.0.0.1') {
                        $wechatUser['unionid'] = 'onhl355f-ofX5e0-4I4vn0bswVPM';
                    } else
                        throw new Exception('获取UnionId失败');
                }
            }

            $user = User::where('unionid', $wechatUser->unionid)->first();
            if (!$user) {
                throw new Exception('您的账号未在小程序上登录过，获取用户信息失败');
            }
            $request->session()->put($sessionKey, $user);
        }
        return $next($request);
    }
}