Question

我一直在遵循本指南：https://www.freecodecamp.org/news/how-to-build-a-keyword-density-tool-with-laravel/ 并在最后发现我的应用程序不会返回任何数组。事实上，当我点击提交按钮时，我注意到我收到了一个 419 控制台错误。在检查了与 CSRF 令牌相关的大多数问题后，但从检查中我发现这是正确的。

任何人都可以发现或引导我朝着正确的方向前进，以便我的应用返回一些东西。它不是很先进，实际上它是一个非常简单的应用程序，但这是我第一次使用 Laravel，因此不胜感激。

我的 index.blade.php（包含表单和ajax请求）

@extends('layouts.master')

@section('content')
    <form id="keywordDensityInputForm">
        <div class="form-group">
            <label for="keywordDensityInput">HTML or Text</label>
            <textarea class="form-control" id="keywordDensityInput" rows="12"></textarea>
        </div>
        <button type="submit" class="btn btn-primary mb-2">Get Keyword Densities</button>
    </form>
@endsection


@section ('scripts')
    <script>
        $('#keywordDensityInputForm').on('submit', function (e) { // Listen for submit button click and form submission.
            e.preventDefault(); // Prevent the form from submitting
            let kdInput = $('#keywordDensityInput').val(); // Get the input
            if (kdInput !== "") { // If input is not empty.
            // Set CSRF token up with ajax.
                $.ajaxSetup({
                    headers: {
                        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                    }
                });

                $.ajax({ // Pass data to backend
                    type: "POST",
                    url: "tool/calculate-and-get-density",
                    data: {'keywordInput': kdInput},
                    success: function (response) {
                        // On Success, build a data table with keyword and densities
                        if (response.length > 0) {
                            let html = "<table class='table'><tbody><thead>";
                            html += "<th>Keyword</th>";
                            html += "<th>Count</th>";
                            html += "<th>Density</th>";
                            html += "</thead><tbody>";

                            for (let i = 0; i < response.length; i++) {
                                html += "<tr><td>"+response[i].keyword+"</td>";
                                html += "<td>"+response[i].count+"</td>";
                                html += "<td>"+response[i].density+"%</td></tr>";
                            }

                            html += "</tbody></table>";

                            $('#keywordDensityInputForm').after(html); // Append the html table after the form.
                        }
                    },
                });
            }
        })
    </script>
@endsection

我的master.blade.php（头部CSRF令牌）

<!DOCTYPE html>
<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <title>Keyword Density Tool</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
          integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <!-- Fonts -->
    <link href="https://fonts.googleapis.com/css?family=Nunito:200,600" rel="stylesheet">
    <meta name="csrf-token" content="{{ csrf_token() }}">
<style>
    body {padding-top: 5em;}
</style>
</head>
<body>

...

<main role="main" class="container mt-3">

    @yield('content')

</main><!-- /.container -->

<script
  src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
@yield('scripts')
</body>
</html>

我的控制器

<?php 
    
    namespace App\Http\Controllers;
    
    use Illuminate\Http\Request;
    use Html2Text\Html2Text;
    
    class ToolController extends Controller
    {
        public function index()
        {
           return view('tool.index');
        }
        
        public function CalculateAndGetDensity(Request $request) {
                if ($request->isMethod('GET')) {
        
                    if (isset($request->keywordInput)) { // Test the parameter is set.
                        $html = new Html2Text($request->keywordInput); // Setup the html2text obj.
                        $text = strtolower($html->getText()); // Execute the getText() function and convert all text to lower case to prevent work duplication
                        $totalWordCount = str_word_count($text); // Get the total count of words in the text string
                        $wordsAndOccurrence  = array_count_values(str_word_count($text, 1)); // Get each word and the occurrence count as key value array
                        arsort($wordsAndOccurrence); // Sort into descending order of the array value (occurrence)
        
                        $keywordDensityArray = [];
                        // Build the array
                        foreach ($wordsAndOccurrence as $key => $value) {
                            $keywordDensityArray[] = ["keyword" => $key, // keyword
                                "count" => $value, // word occurrences
                                "density" => round(($value / $totalWordCount) * 100,2)]; // Round density to two decimal places.
                        }
        
                        return $keywordDensityArray;
                    }
                }
            }
    }
?>

和我的路线

Route::get('/tool', 'App\Http\Controllers\ToolController@index')->name('KDTool');
Route::post('/tool/calculate-and-get-density', 'App\Http\Controllers\ToolController@CalculateAndGetDensity');

我得到的错误是这个

https://imgur.com/lRYqo09

我已经检查了有关 stackoverflow 的所有其他答案建议，但我所做的一切似乎都没有让我更进一步。提前感谢您的任何帮助

应用了CSRF令牌的ajax发布请求后的Laravel 419

0 个答案: