Laravel 异常处理

Laravel应用中所有的异常都通过 App\Exceptions\[Handler](http://laravelacademy.org/tags/handler "View all posts in Handler") 进行处理，下面我们先简单分析下给异常处理器类的属性和方法：

laravel中针对具体的处理逻辑，可能存在的错误。try{} catch(Exception $e) {}捕获处理对应的错误。针对大量出现的可能存在异常，可以使用全局异常捕获，如NotFoundException ,ModelNotFoundException

在\App\Exception\Handle中，对于不需要处理的异常添加到 $dontReport = []。其中report方法一般是对应的分开记录日志处理，render方法是对应的异常http响应处理。

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that should not be reported.
     *
     * @var array
     */
    protected $dontReport = [
         AuthorizationException::class,
        HttpException::class,
        ModelNotFoundException::class,
        ValidationException::class,
    ];

    /**
     * Report or log an exception.
     *
     * This is a great spot to send exceptions to Sentry, Bugsnag, etc.
     *
     * @param  \Exception  $e
     * @return void
     */
    public function report(Exception $e)
    {
        return parent::report($e);
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $e
     * @return \Illuminate\Http\Response
     */
    public function render($request, Exception $e)
    {
        if ($e instanceof ModelNotFoundException) {
            $e = new NotFoundHttpException($e->getMessage(), $e);
        }

        if ($e instanceof \ErrorException) {
            return xxx;
        }

    }
}

render方法

    /**  
         * Render an exception into an HTTP response.  
         *  
         * @param  \Illuminate\Http\Request $request  
         * @param  \Exception $e  
         * @return \Illuminate\Http\Response  
         */  
        public function render($request, Exception $e)  
        {  
            //TODO 这里一条自定义http错误自动跳转到首页  
            if (getenv('APP_ENV') == 'production' && $e instanceof HttpException) {  
                Log::error($e);  
                return Redirect::to('admin/dashboard');  
            }  
            if (getenv('APP_ENV') == 'production' && $e instanceof TokenMismatchException) {  
                Log::error($e);  
                if ($request->ajax()) {  
      
                    return Response::json(  
                        [  
                            'status' => 'failed',  
                            'error' =>  
                                [  
                                    'status_code' => 401,  
                                    'message' => '操作未完成，系统加载失败，重新登录或者刷新当前页面！'  
                                ]  
                        ]  
                    );  
                }  
                return Redirect::to('admin/logout');  
      
            }  
            return parent::render($request, $e);  
        }