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laravel自定义中间件实例

一、总结

一句话总结：

二、laravel自定义中间件实例

1、中间件位置和代码

legend3/app/Http/Middleware/Home/UploadLessonMiddleware.php

<?php

namespace AppHttpMiddlewareHome;

use AppModelsBaHomeAaUserAbUserSettingGetGetUserSetting;
use Closure;
use Auth;

//上传功能中间件
class UploadLessonMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  IlluminateHttpRequest  $request
     * @param  Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        //前端的上传功能中间件
        //用来判断用户是否有上传课程、上传视频、上传博客的权限
        //如果登录成功就进行下一步
        //如果没有登录成功就返回到登录页
        if(!Auth::guard('user')->check()){
            return redirect('/login');
        }else{
            //如果登录了
            $u_id=Auth::guard('user')->user()->id;
            $u_id=intval($u_id);
            $user_setting=GetUserSetting::byUID($u_id);
            //有发布课程的权限
            if($user_setting['us_can_publish_lesson']){
                //进行下一步操作
                return $next($request);
            }else{
                return redirect('/no_upload_lesson_permission');
            }
        }

    }
}

 

2、注册中间件

legend3/app/Http/Kernel.php

protected $routeMiddleware = [
    //fry
    //后端的登录中间件注册
    'admin.auth'=>MiddlewareAdminAdmin::class,
    //前端的登录中间件注册
    'home.auth'=>MiddlewareHomeUser::class,
    //发布课程权限中间件
    'upload_lesson'=>MiddlewareHomeUploadLessonMiddleware::class,

    省略若干无关代码...........
]

3、使用中间件

class CreateLessonController extends CommonController
{

    public function __construct()
    {
        //排除'index'方法，进行中间件的验证
        $this->middleware('upload_lesson')->except(['no_upload_lesson_permission']);
    }
    省略若干无关代码........... 
}

可以写个方法来显示没通过权限验证的消息

//没有上传课程权限的中间件返回显示信息
public function no_upload_lesson_permission(){
    $validate_message='你没有权限发布课程、章节、视频！！';
    $error_data=['validate_message'];
    return view('home.ya_common.validate_return_page.validate_return_page',compact($error_data));
}