为什么当我尝试用Laravel控制器方法处理AJAX请求时获得此异常 - Why I obtain this exception when I try to handle an AJAX request with a Laravel controller method?

我是PHP和Laravel的新手，我有以下问题。

从我的观点，我执行AJAX POST请求通过JQuery，通过以下代码:

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';
}

必须返回已搜索字符串的视图。

问题是我正在获得这个错误消息:

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

是由TokenMismatchException引起的异常创建的，在Laravel stackrace中我可以看到这样的东西:

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

有什么问题吗?如何解决这个问题?

应该为Ajax请求设置令牌。把它放到主布局中:

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

并对每个请求执行以下JS代码:

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

如果你的代码是。php页面而不是。html页面

试试这个:

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

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

您需要将csv -token附加到您的ajax请求…这里是链接

要添加一个，你可以使用csrf_token()方法，它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中你可以使用它的值。

。在HTML表单中你需要添加:

{{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());
   }
 });