Laravel 微信小程序后端实现用户登录的示例代码

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
];

//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');
});

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

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
  }

{
 "pages": [
  "pages/index/index",
  "pages/auth/auth",//做一个登录页面
  "pages/logs/logs"
 ],
 "window": {
  "backgroundTextStyle": "light",
  "navigationBarBackgroundColor": "#fff",
  "navigationBarTitleText": "WeChat",
  "navigationBarTextStyle": "black"
 },
 "sitemapLocation": "sitemap.json",
 "permission": {
  "scope.userLocation": {
   "desc": "你的位置信息将用于小程序位置接口的效果展示"
  }
 }
}

const app = getApp();
Page({
 /**
  * 页面的初始数据
  */
 data: {
  UserData: [],
  isClick: false,
 },
 /**
  * 生命周期函数--监听页面加载
  */
 onLoad: function(options) {
 },
 login: function(e) {
  let that=this
  that.setData({
   isClick: true
  })
  wx.getUserInfo({
   lang: "zh_CN",
   success: response => {
    wx.login({
     success: res => {
      let data = {
       code:res.code,
       nickname: response.userInfo.nickName,
       avatar: response.userInfo.avatarUrl,
       country: response.userInfo.country ? response.userInfo.country : '',
       province: response.userInfo.province ? response.userInfo.province : '',
       city: response.userInfo.city ? response.userInfo.city : '',
       gender: response.userInfo.gender ? response.userInfo.gender : '',
       language: response.userInfo.language ? response.userInfo.language : '',
      }
      console.log(data)
      app.globalData.userInfo = data;
      wx.request({
       url: '你的后端地址',//我用的valet，http://ak.name/api/v1/user/login
       method: 'POST',
       data: data,
       header: {
        'Content-Type': 'application/x-www-form-urlencoded'
       },
       success: function (res) {
        console.log(res)
        if (res.statusCode != '200') {
         return false;
        }
        wx.setStorageSync('access_token', res.data.access_token)
        wx.setStorageSync('UserData', res.data.data ? res.data.data : '')
        wx.redirectTo({
         url: '/pages/index/index',
        })
       },
       fail: function (e) {
        wx.showToast({
         title: '服务器错误',
         duration: 2000
        });
        that.setData({
         isClick: false
        })
       },
      });
     }
    })
   },
   fail: function (e) {
    that.setData({
     isClick: false
    })
   },
  })
 }
})

<view class='padding-xl'>
 <button class='cu-btn margin-top bg-green shadow lg block' open-type="getUserInfo" bindgetuserinfo="login" disabled="{{isClick}}" type='success'>
  <text wx:if="{{isClick}}" class='cuIcon-loading2 iconfont-spin'></text> 微信登录</button>
</view>