当我尝试使用 Laravel 控制器方法处理 AJAX 请求时，为什么会出现此异常？

Question

我是 PHP 和 Laravel 的新手，遇到以下问题。

在我看来，我通过 JQuery 执行 AJAX POST 请求，代码如下：

jQuery.ajax({
  url: '/doSearch',
  type: 'POST',
  dataType: 'json',
  //data: $form.serialize(),
  success: function(data){
   console.info('ssssssssssiiii',data);
     },
     error: function(data, b){
   console.info('erroreeeeee');
     }
 });

这个POST请求由这个简单的控制器方法处理：

public function doSearch(){
    echo 'SEARCHED';
}

必须返回视图 SEARCHED 字符串。

问题是我收到此错误消息：

http://localhost:8000/doSearch 500 (Internal Server Error)

这是由 TokenMismatchException 引发的这个异常创建的，在 Laravel stackrace 中我可以看到如下内容：

in VerifyCsrfToken.php line 68
at VerifyCsrfToken->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in ShareErrorsFromSession.php line 49
at ShareErrorsFromSession->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in StartSession.php line 64
at StartSession->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in AddQueuedCookiesToResponse.php line 37
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in EncryptCookies.php line 59
at EncryptCookies->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Pipeline.php line 104
at Pipeline->then(object(Closure)) in Router.php line 644
at Router->runRouteWithinStack(object(Route), object(Request)) in Router.php line 618
at Router->dispatchToRoute(object(Request)) in Router.php line 596
at Router->dispatch(object(Request)) in Kernel.php line 267
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request)) in Pipeline.php line 53
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in CheckForMaintenanceMode.php line 46
at CheckForMaintenanceMode->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Pipeline.php line 104
at Pipeline->then(object(Closure)) in Kernel.php line 149
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 116
at Kernel->handle(object(Request)) in index.php line 54
at require_once('C:\xampp\htdocs\www.betrivius.it\application\public\index.php') in server.php line 21

可能是什么问题？我该如何解决这个问题？

Answer 1

你应该setup token for Ajax requests。把它放在主布局中：

<meta name="csrf-token" content="{{ csrf_token() }}">

并在每个请求中执行这段 JS 代码：

$.ajaxSetup({
    headers: {
        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
    }
});

Answer 2

您需要将 csrf-token 附加到您的 ajax 请求...这里是 link

要添加一个，您可以使用 csrf_token() 方法，该方法将自动创建一个名为“_token”的隐藏字段，其值设置为“token”，然后在 ajax 中您可以使用它的值。

例如。 在表单中的 html 中，您需要添加：

{{csrf_token()}}

在 ajax 中：

jQuery.ajax({
  url: '/doSearch',
  type: 'POST',
  dataType: 'json',
  //data: $form.serialize(),
  success: function(data){
   console.info('ssssssssssiiii',data);
     },
     error: function(data, b){
   console.info('erroreeeeee');
     },
   beforeSend:function(xhr){
      xhr.setRequestHeader('X-CSRF-TOKEN',$('_token').val());
   }
 });

Answer 3

如果您正在编写 .php 页面而不是 .html 页面

试试这个：

<meta name="csrf-token" content="<?php echo csrf_token(); ?>">

改为：

<meta name="csrf-token" content="{{ csrf_token() }}">

它对我有用。