laravel--通用后台管理系统--权限中间件

学习总结

1.通过Auth::user()获取用户的登录信息

2.通过$request->route()->action['controller']获取当前访问路由地址对应的控制器App\Http\Controllers\admins\Home@index

3.通过字符串函数stopos()获取控制器和方法,然后判断是否存在该菜单，菜单是否可用，是否有权限操作菜单

1.权限中间件RightsVerify.php

<?php

namespace App\Http\Middleware;

use Closure;
use Hamcrest\Arrays\IsArray;
//引入数据库查询构造器，链式调用
use Illuminate\Support\Facades\DB;
//引入Auth类，获取当前登录的用户
use Illuminate\Support\Facades\Auth;

use function GuzzleHttp\json_decode;

class RightsVerify
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        //获取当前登录用户的用户信息
        $user = Auth::user();
        //获取当前登录用户的角色id
        $gid = $user->gid;
        $gInfo = DB::table('admin_group')->where('gid',$gid)->item();
        if(!$gInfo):
            return response('不存在该角色',200);
        endif;

        //把所有当前用户可用的菜单保存在数组中
        $rights = [];
        if($gInfo['rights']):
           $rights = json_decode($gInfo['rights'],true);
        endif;

        //检查当前用户访问的是哪个菜单，是否有权限访问，是否有该菜单

        $curUrl = $request->route()->action['controller'];//返回当前访问的路由所对应的控制器和方法
        //App\Http\Controllers\admins\Home@index
        $pos = strrpos($curUrl,'\\');//从字符串右边开始查找\在字符串中的位置
        $curUrl = substr($curUrl,$pos+1);
        //Home@index
        $pos = strpos($curUrl,'@');//获取分隔符的位置
        $con = substr($curUrl,0,$pos);//获取要访问的控制器
        $act = substr($curUrl,$pos+1);//获取要访问的方法
        //在数据库中查找对应的菜单
        $curMenu = DB::table('admin_menu')->where('controller',$con)->where('action',$act)->item();
        if(!$curMenu):
            return response('不存在此功能',200);
        endif;
        if($curMenu['status']==1):
            return response('此功能已被禁用,请联系管理员开启此功能',200);
        endif;
        if(!(in_array($curMenu['mid'],$rights))):
            return response('没有权限使用此菜单，请更改权限后使用',200);
        endif;
        // echo '<pre>';
        // print_r($curMenu);
        // exit;
        return $next($request);
    }
}

2.注册权限控制中间件app/kernel.php中的$routeMiddleware属性

<?php

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel
{
    /**
     * The application's global HTTP middleware stack.
     *
     * These middleware are run during every request to your application.
     *
     * @var array
     */
    protected $middleware = [
        // \App\Http\Middleware\TrustHosts::class,
        \App\Http\Middleware\TrustProxies::class,
        \Fruitcake\Cors\HandleCors::class,
        \App\Http\Middleware\CheckForMaintenanceMode::class,
        \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
        \App\Http\Middleware\TrimStrings::class,
        \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,
    ];

    /**
     * The application's route middleware groups.
     *
     * @var array
     */
    protected $middlewareGroups = [
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            \Illuminate\Session\Middleware\StartSession::class,
            // \Illuminate\Session\Middleware\AuthenticateSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
        ],

        'api' => [
            'throttle:60,1',
            \Illuminate\Routing\Middleware\SubstituteBindings::class,
        ],
    ];

    /**
     * The application's route middleware.
     *
     * These middleware may be assigned to groups or used individually.
     *
     * @var array
     */
    protected $routeMiddleware = [
        'auth' => \App\Http\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
        'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
        'can' => \Illuminate\Auth\Middleware\Authorize::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'password.confirm' => \Illuminate\Auth\Middleware\RequirePassword::class,
        'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'verified' => \Illuminate\Auth\Middleware\EnsureEmailIsVerified::class,
        //注册权限控制中间件
        'rights' => \App\Http\Middleware\RightsVerify::class,
    ];
}

3.在web.php中使用中间件

<?php

use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/', function(){
    return view('welcome');
});


//登录页面
Route::get('/admins/account/login','admins\Account@login')->name('login');//使用name()方法对路由进行命名
//验证码图片
Route::get('/admins/account/captcha','admins\Account@captcha');
//登录操作
Route::post('/admins/account/dologin','admins\Account@dologin');

//后台首页
//调用框架自带的auth中间件判断是否登录,namespace()方法指定控制器的命令空间，group()方法中是一个回调函数，把一组路由写在这个回调函数中
Route::namespace('admins')->middleware(['auth','rights'])->group(function(){
    Route::get('/admins/home/index','Home@index');
    Route::get('/admins/home/welcome','Home@welcome');

    //账号管理
    Route::get('/admins/admin/index','Admin@index');
    //添加账号
    Route::get('/admins/admin/add','Admin@add');
});