接上篇微信小程序后端搭建：分享：Laravel 微信小程序后端搭建

后端搭建好后第一件事就是用户登录认证，简单实现微信小程序登录认证

1.user 模型

use Laravel\Passport\HasApiTokens; 新增

use HasApiTokens, Notifiable;

protected $fillable = [
 'id',
 'name',
 'email',
 'email_verified_at',
 'username',
 'phone',
 'avatar',//我用来把微信头像的/0清晰图片，存到又拍云上
 'weapp_openid',
 'nickname',
 'weapp_avatar',
 'country',
 'province',
 'city',
 'language',
 'location',
 'gender',
 'level',//用户等级
 'is_admin',//is管理员
];

2. 新增一条路由

//前端小程序拿到的地址：https://域名/api/v1/自己写的接口
Route::group(['prefix' => '/v1'], function () {
  Route::post('/user/login', 'UserController@weappLogin');
});

3. 在 UserController 控制器里新建 function weappLogin ()，别忘了 use 这些

use App\User;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

写两个 function weappLogin (),avatarUpyun ()

public function weappLogin(Request $request)
  {
    $code = $request->code;
    // 根据 code 获取微信 openid 和 session_key
    $miniProgram = \EasyWeChat::miniProgram();
    $data = $miniProgram->auth->session($code);
    if (isset($data['errcode'])) {
      return $this->response->errorUnauthorized('code已过期或不正确');
    }
    $weappOpenid = $data['openid'];
    $weixinSessionKey = $data['session_key'];
    $nickname = $request->nickname;
    $avatar = str_replace('/132', '/0', $request->avatar);//拿到分辨率高点的头像
    $country = $request->country?$request->country:'';
    $province = $request->province?$request->province:'';
    $city = $request->city?$request->city:'';
    $gender = $request->gender == '1' ? '1' : '2';//没传过性别的就默认女的吧，体验好些
    $language = $request->language?$request->language:'';

    //找到 openid 对应的用户
    $user = User::where('weapp_openid', $weappOpenid)->first();
    //没有，就注册一个用户
    if (!$user) {
      $user = User::create([
        'weapp_openid' => $weappOpenid,
        'weapp_session_key' => $weixinSessionKey,
        'password' => $weixinSessionKey,
        'avatar' => $request->avatar?$this->avatarUpyun($avatar):'',
        'weapp_avatar' => $avatar,
        'nickname' => $nickname,
        'country' => $country,
        'province' => $province,
        'city' => $city,
        'gender' => $gender,
        'language' => $language,
      ]);
    }
    //如果注册过的，就更新下下面的信息
    $attributes['updated_at'] = now();
    $attributes['weixin_session_key'] = $weixinSessionKey;
    $attributes['weapp_avatar'] = $avatar;
    if ($nickname) {
      $attributes['nickname'] = $nickname;
    }
    if ($request->gender) {
      $attributes['gender'] = $gender;
    }
    // 更新用户数据
    $user->update($attributes);
    // 直接创建token并设置有效期
    $createToken = $user->createToken($user->weapp_openid);
    $createToken->token->expires_at = Carbon::now()->addDays(30);
    $createToken->token->save();
    $token = $createToken->accessToken;

    return response()->json([
      'access_token' => $token,
      'token_type' => "Bearer",
      'expires_in' => Carbon::now()->addDays(30),
      'data' => $user,
    ], 200);
  }

  //我保存到又拍云了，版权归腾讯所有。。。头条闹的
  private function avatarUpyun($avatar)
  {
    $avatarfile = file_get_contents($avatar);
    $filename = 'avatars/' . uniqid() . '.png';//微信的头像链接我也不知道怎么获取后缀，直接保存成png的了
    Storage::disk('upyun')->write($filename, $avatarfile);
    $wexinavatar = config('filesystems.disks.upyun.protocol') . '://' . config('filesystems.disks.upyun.domain') . '/' . $filename;
    return $wexinavatar;//返回链接地址
  }