Google Recaptcha v3示例演示

时间：2018-07-24 21:20:37

标签： servlets recaptcha recaptcha-v3

直到现在，我仍在使用Google Recaptcha v2，但现在我想使用最新版本（v3）更新我的WebApp。

是否有人可以为基本表单添加完全可用的Google Recaptcha v3示例，因为我找不到它的任何演示示例？

我真的很感激。

非常感谢您。

PS：我在服务器端使用Java Servlet，但是如果您解释使用php还是其他方法都没关系。

9 个答案:

答案 0 :(得分：21)

实现ReCaptcha v3的简单代码

基本JS代码

<script src="https://www.google.com/recaptcha/api.js?render=your reCAPTCHA site key here"></script>
<script>
    grecaptcha.ready(function() {
    // do request for recaptcha token
    // response is promise with passed token
        grecaptcha.execute('your reCAPTCHA site key here', {action:'validate_captcha'})
                  .then(function(token) {
            // add token value to form
            document.getElementById('g-recaptcha-response').value = token;
        });
    });
</script>

基本HTML代码

<form id="form_id" method="post" action="your_action.php">
    <input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">
    <input type="hidden" name="action" value="validate_captcha">
    .... your fields
</form>

基本的PHP代码

    if(isset($_POST['g-recaptcha-response'])){
        $captcha=$_POST['g-recaptcha-response'];
    }
    else
        $captcha = false;

    if(!$captcha){
        //Do something with error
    }
    else{
        $secret = 'Your secret key here';
        $response=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=
            .$secret.&response=".$captcha."&remoteip=".$_SERVER['REMOTE_ADDR']);
        if($response.success==false)
        {
            //Do something with error
        }
    }
... The Captcha is valid you can continue with the rest of your code

答案 1 :(得分：11)

这里是链接：

https://recaptcha-demo.appspot.com/

只需请求v3的分数，它就会以JSON形式返回响应

答案 2 :(得分：4)

我假设您已经拥有站点密钥和机密。请执行此步骤。

在HTML文件中，添加脚本。

 <script src="https://www.google.com/recaptcha/api.js?render=put your site key here"></script>

此外，请使用jQuery简化事件处理。

这是简单的表格。

 <form id="comment_form" action="form.php" method="post" >
      <input type="email" name="email" placeholder="Type your email" size="40"><br><br>
      <textarea name="comment" rows="8" cols="39"></textarea><br><br>
      <input type="submit" name="submit" value="Post comment"><br><br>
    </form>

您需要初始化Google Recaptcha并监听ready事件。这是这样做的方法。

     <script>
       // when form is submit
    $('#comment_form').submit(function() {
        // we stoped it
        event.preventDefault();
        var email = $('#email').val();
        var comment = $("#comment").val();
        // needs for recaptacha ready
        grecaptcha.ready(function() {
            // do request for recaptcha token
            // response is promise with passed token
            grecaptcha.execute('put your site key here', {action: 'create_comment'}).then(function(token) {
                // add token to form
                $('#comment_form').prepend('<input type="hidden" name="g-recaptcha-response" value="' + token + '">');
                    $.post("form.php",{email: email, comment: comment, token: token}, function(result) {
                            console.log(result);
                            if(result.success) {
                                    alert('Thanks for posting comment.')
                            } else {
                                    alert('You are spammer ! Get the @$%K out.')
                            }
                    });
            });;
        });
  });
  </script>

这是示例PHP文件。您可以使用Servlet或Node或任何后端语言来代替它。

<?php

        $email;$comment;$captcha;
        if(isset($_POST['email'])){
          $email=$_POST['email'];
        }if(isset($_POST['comment'])){
          $comment=$_POST['comment'];
        }if(isset($_POST['token'])){
          $captcha=$_POST['token'];
          }
        if(!$captcha){
          echo '<h2>Please check the the captcha form.</h2>';
          exit;
        }
        $secretKey = "put your secret key here";
        $ip = $_SERVER['REMOTE_ADDR'];

        // post request to server

        $url =  'https://www.google.com/recaptcha/api/siteverify?secret=' . urlencode($secretKey) .  '&response=' . urlencode($captcha);
        $response = file_get_contents($url);
        $responseKeys = json_decode($response,true);
        header('Content-type: application/json');
        if($responseKeys["success"]) {
                echo json_encode(array('success' => 'true'));
        } else {
                echo json_encode(array('success' => 'false'));
        }
?>

以下是教程链接：https://codeforgeek.com/2019/02/google-recaptcha-v3-tutorial/

希望有帮助。

答案 3 :(得分：4)

我认为使用Bootstrap 4形式的PHP中的功能全面的reCaptcha v3示例演示可能对某些人有用。

参考显示的依赖关系，交换您的电子邮件地址和密钥（创建您自己的密钥here），该表单即可进行测试和使用。我进行了代码注释，以更好地阐明逻辑，还添加了注释掉的控制台日志和print_r行，以快速启用查看验证令牌和Google生成的数据的功能。

附带的jQuery函数是可选的，尽管它确实在此演示中提供了更好的用户提示体验。

PHP文件（mail.php）：

添加秘密密钥（ 2 个地方）和电子邮件地址（）。 

<?php

if ($_SERVER["REQUEST_METHOD"] == "POST") {

  # BEGIN Setting reCaptcha v3 validation data
  $url = "https://www.google.com/recaptcha/api/siteverify";
  $data = [
    'secret' => "your-secret-key-here",
    'response' => $_POST['token'],
    'remoteip' => $_SERVER['REMOTE_ADDR']
  ];

  $options = array(
    'http' => array(
      'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
      'method'  => 'POST',
      'content' => http_build_query($data)
    )
    );
  
  # Creates and returns stream context with options supplied in options preset 
  $context  = stream_context_create($options);
  # file_get_contents() is the preferred way to read the contents of a file into a string
  $response = file_get_contents($url, false, $context);
  # Takes a JSON encoded string and converts it into a PHP variable
  $res = json_decode($response, true);
  # END setting reCaptcha v3 validation data
   
    // print_r($response); 
# Post form OR output alert and bypass post if false. NOTE: score conditional is optional
# since the successful score default is set at >= 0.5 by Google. Some developers want to
# be able to control score result conditions, so I included that in this example.

  if ($res['success'] == true && $res['score'] >= 0.5) {
 
    # Recipient email
    $mail_to = "youremail@domain.com";
    
    # Sender form data
    $subject = trim($_POST["subject"]);
    $name = str_replace(array("\r","\n"),array(" "," ") , strip_tags(trim($_POST["name"])));
    $email = filter_var(trim($_POST["email"]), FILTER_SANITIZE_EMAIL);
    $phone = trim($_POST["phone"]);
    $message = trim($_POST["message"]);
    
    if (empty($name) OR !filter_var($email, FILTER_VALIDATE_EMAIL) OR empty($phone) OR empty($subject) OR empty($message)) {
      # Set a 400 (bad request) response code and exit
      http_response_code(400);
      echo '<p class="alert-warning">Please complete the form and try again.</p>';
      exit;
    }

    # Mail content
    $content = "Name: $name\n";
    $content .= "Email: $email\n\n";
    $content .= "Phone: $phone\n";
    $content .= "Message:\n$message\n";

    # Email headers
    $headers = "From: $name <$email>";

    # Send the email
    $success = mail($mail_to, $subject, $content, $headers);
    
    if ($success) {
      # Set a 200 (okay) response code
      http_response_code(200);
      echo '<p class="alert alert-success">Thank You! Your message has been successfully sent.</p>';
    } else {
      # Set a 500 (internal server error) response code
      http_response_code(500);
      echo '<p class="alert alert-warning">Something went wrong, your message could not be sent.</p>';
    }   

  } else {

    echo '<div class="alert alert-danger">
        Error! The security token has expired or you are a bot.
       </div>';
  }  

} else {
  # Not a POST request, set a 403 (forbidden) response code
  http_response_code(403);
  echo '<p class="alert-warning">There was a problem with your submission, please try again.</p>';
} ?>

HTML <head>

引导CSS依赖性和reCaptcha客户端验证 放在<head>标签之间-将您自己的站点密钥粘贴到已标注的位置。 

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<script src="https://www.google.com/recaptcha/api.js?render=your-site-key-here"></script>

HTML <body>

放在<body>标签之间。 

<!-- contact form demo container -->
<section style="margin: 50px 20px;">
  <div style="max-width: 768px; margin: auto;">
    
    <!-- contact form -->
    <div class="card">
      <h2 class="card-header">Contact Form</h2>
      <div class="card-body">
        <form class="contact_form" method="post" action="mail.php">

          <!-- form fields -->
          <div class="row">
            <div class="col-md-6 form-group">
              <input name="name" type="text" class="form-control" placeholder="Name" required>
            </div>
            <div class="col-md-6 form-group">
              <input name="email" type="email" class="form-control" placeholder="Email" required>
            </div>
            <div class="col-md-6 form-group">
              <input name="phone" type="text" class="form-control" placeholder="Phone" required>
            </div>
            <div class="col-md-6 form-group">
              <input name="subject" type="text" class="form-control" placeholder="Subject" required>
            </div>
            <div class="col-12 form-group">
              <textarea name="message" class="form-control" rows="5" placeholder="Message" required></textarea>
            </div>

            <!-- form message prompt -->
            <div class="row">
              <div class="col-12">
                <div class="contact_msg" style="display: none">
                  <p>Your message was sent.</p>
                </div>
              </div>
            </div>

            <div class="col-12">
              <input type="submit" value="Submit Form" class="btn btn-success" name="post">
            </div>

            <!-- hidden reCaptcha token input -->
            <input type="hidden" id="token" name="token">
          </div>

        </form>
      </div>
    </div>

  </div>
</section>
<script>
  grecaptcha.ready(function() {
    grecaptcha.execute('your-site-key-here', {action: 'homepage'}).then(function(token) {
       // console.log(token);
       document.getElementById("token").value = token;
    });
  });
</script>

<!-- References for the opitional jQuery function to enhance end-user prompts -->
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="form.js"></script>

用于增强的UX（form.js）的可选jQuery函数：

(function ($) {
'use strict';

var form = $('.contact_form'),
  message = $('.contact_msg'),
  form_data;

// Success function
function done_func(response) {
  message.fadeIn()
  message.html(response);
  setTimeout(function () {
    message.fadeOut();
  }, 10000);
  form.find('input:not([type="submit"]), textarea').val('');
}

// fail function
function fail_func(data) {
  message.fadeIn()
  message.html(data.responseText);
  setTimeout(function () {
    message.fadeOut();
  }, 10000);
}

form.submit(function (e) {
  e.preventDefault();
  form_data = $(this).serialize();
  $.ajax({
    type: 'POST',
    url: form.attr('action'),
    data: form_data
  })
  .done(done_func)
  .fail(fail_func);
}); })(jQuery);

答案 4 :(得分：2)

我通过有角度的ajax调用在PHP上处理POST。我也很喜欢Google的评分。

这对我来说很好... 

import sympy as sp
t, x_sym = sp.symbols('t x')
x_func = sp.Function('x')
function = t**2*sp.cos((x_func(t)/2))

def replace(funcion):
    function1 = funcion.subs(x_func(t), x_sym)
    return function1

print(replace(function))

在HTML上

  @override
  Widget build(BuildContext context) => Scaffold(
    appBar: AppBar(
      title: Text("Login"),
    ),
    body: AutofillGroup(
        child: Column(
      children: [
        TextField(
          autofillHints: [AutofillHints.email],
          keyboardType: TextInputType.emailAddress,
        ),
        TextField(
          autofillHints: [AutofillHints.password],
          keyboardType: TextInputType.text,
        ),
      ],
    )));

关于js 

$postData = json_decode(file_get_contents('php://input'), true); //get data sent via post
$captcha = $postData['g-recaptcha-response'];

header('Content-Type: application/json');
if($captcha === ''){
    //Do something with error
    echo '{ "status" : "bad", "score" : "none"}';
} else {
    $secret   = 'your-secret-key';
    $response = file_get_contents(
        "https://www.google.com/recaptcha/api/siteverify?secret=" . $secret . "&response=" . $captcha . "&remoteip=" . $_SERVER['REMOTE_ADDR']
    );
    // use json_decode to extract json response
    $response = json_decode($response);

    if ($response->success === false) {
        //Do something with error
        echo '{ "status" : "bad", "score" : "none"}';
    }else if ($response->success==true && $response->score <= 0.5) {
        echo '{ "status" : "bad", "score" : "'.$response->score.'"}';
    }else {
        echo '{ "status" : "ok", "score" : "'.$response->score.'"}';
    }
}

答案 5 :(得分：1)

我们仅使用recaptcha-V3来查看网站的流量质量，并将其用作非阻塞。由于recaptcha-V3不需要在网站上显示，可以用作隐藏内容，但您可以显示Recaptcha隐私等链接（建议）

头部脚本标记 

<script src="https://www.google.com/recaptcha/api.js?onload=ReCaptchaCallbackV3&render='SITE KEY' async defer></script>

注意：“异步延迟”确保其非阻塞性是我们的特定要求

JS代码： 

<script>
    ReCaptchaCallbackV3 = function() {
        grecaptcha.ready(function() {
            grecaptcha.execute("SITE KEY").then(function(token) {
                $.ajax({
                    type: "POST",
                    url: `https://api.${window.appInfo.siteDomain}/v1/recaptcha/score`,
                    data: {
                        "token" : token,
                    },
                    success: function(data) {
                        if(data.response.success) {
                            window.recaptchaScore = data.response.score;
                            console.log('user score ' + data.response.score)
                        }
                    },
                    error: function() {
                        console.log('error while getting google recaptcha score!')
                    }
                });

            });
        });
    };
</script>

HTML / CSS代码： 

there is no html code since our requirement is just to get score and don't want to show recaptcha badge.

后端-Laravel代码： 

Route:

Route::post('/recaptcha/score', 'Api\\ReCaptcha\\RecaptchaScore@index');


Class:

class RecaptchaScore extends Controller
{
    public function index(Request $request)
    {
        $score = null;

        $response = (new Client())->request('post', 'https://www.google.com/recaptcha/api/siteverify', [
            'form_params' => [
                'response' => $request->get('token'),
                'secret' => 'SECRET HERE',
            ],
        ]);

        $score = json_decode($response->getBody()->getContents(), true);

        if (!$score['success']) {
            Log::warning('Google ReCaptcha Score', [
                'class' => __CLASS__,
                'message' => json_encode($score['error-codes']),
            ]);
        }

        return [
            'response' => $score,
        ];
    }
}

我们获得分数并保存在稍后提交表单时使用的变量中。

参考： https://developers.google.com/recaptcha/docs/v3 https://developers.google.com/recaptcha/

答案 6 :(得分：1)

对于“基本形式”（如原始问题所问），如果您满足于在服务器上进行验证，所需的内容很简单。这是一个完整的 HTML 页面：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<script src="https://www.google.com/recaptcha/api.js"></script>
<script>
<!--
function onSubmit() {
    var form = document.forms[0];
    if ( form['name'].value ) {
        form.submit();
    } else {
        alert( 'Please provide a name.' );
    }
}
//-->
</script> 
</head>
<body>
    <form action="process.asp" method="post">
        Name: <input type="text" name="name" /><br /><br />
        <button class="g-recaptcha" data-sitekey="SITE_KEY" data-callback='onSubmit' data-action='contact'>Send</button>
    </form>
</body>
</html>

这里是处理它的完整页面，为简单起见，使用经典 ASP（文件名 = process.asp）：

<%@ Language=JavaScript %>
<%
var name = Request( 'name' ).Item;
var recaptchaResponse = Request( 'g-recaptcha-response' ).Item;
var ip = Request.ServerVariables( 'REMOTE_ADDR' );
var xmlhttp = Server.CreateObject( 'MSXML2.ServerXMLHTTP' );
var query = 'secret=SECRET_KEY&response=' + recaptchaResponse + '&remoteip=' + ip;
xmlhttp.open( 'POST', 'https://www.google.com/recaptcha/api/siteverify?' + query, false ); // false says to wait for response
xmlhttp.send();
var response = JSON.parse( xmlhttp.responseText );
Response.Write( name + ' is a ' + (response.success && response.action == 'contact' && response.score > 0.5 ? 'HUMAN' : 'ROBOT') );
%>

一些注意事项：

  1. 您需要提供自己的 SITE_KEY 和 SECRET_KEY。
  2. 您需要一个 JSON 解析器。
  3. 您将使用适合您的方法进行服务器端 POST 服务器。
  4. 我添加了一个简单的表单字段验证，以便您了解如何 整合它。
  5. 您可以将“action”字符串设为您想要的任何内容，但请确保 服务器上的内容与 HTML 中的内容一致。
  6. 您可能希望以不同的方式响应响应。成功 不正确或 response.action 与您的操作不符 字符串，或进行其他错误检查。
  7. 您可能需要除“> 0.5”以外的分数条件。
  8. 此代码在两分钟超时方面没有问题。

答案 7 :(得分：0)

我已经看到大多数文章无法正常工作，这就是为什么新开发人员和专业开发人员对此感到困惑的原因。

我正在以一种非常简单的方式向您解释。在这段代码中，我每隔3秒就会在客户端生成一个Google Recaptcha令牌，因为该令牌仅在几分钟内有效，这就是为什么如果任何用户花时间填写表单，该令牌可能会过期的原因。 / p>

首先，我有一个index.php文件，用于编写HTML和JavaScript代码。

    <!DOCTYPE html>
<html>
   <head>
      <title>Google Recaptcha V3</title>
   </head>
   <body>
      <h1>Google Recaptcha V3</h1>
      <form action="recaptcha.php" method="post">
         <label>Name</label>
         <input type="text" name="name" id="name">
         <input type="hidden" name="token" id="token" /> 
         <input type="hidden" name="action" id="action" /> 
         <input type="submit" name="submit">
      </form>
      <script src="https://www.google.com/recaptcha/api.js?render=put your site key here"></script>
      <script  src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
      <script type="text/javascript">
         $(document).ready(function(){
            setInterval(function(){
            grecaptcha.ready(function() {
                grecaptcha.execute('put your site key here', {action: 'application_form'}).then(function(token) {
                    $('#token').val(token);
                    $('#action').val('application_form');
                });
            });
            }, 3000);
         });

      </script>
   </body>
</html>

接下来，我创建了recaptcha.php文件以在服务器端执行

<?php

if ($_POST['submit']) {
    $name   = $_POST['name'];
    $token  = $_POST['token'];
    $action = $_POST['action'];

    $curlData = array(
        'secret' => 'put your secret key here',
        'response' => $token
    );

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "https://www.google.com/recaptcha/api/siteverify");
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($curlData));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $curlResponse = curl_exec($ch);

    $captchaResponse = json_decode($curlResponse, true);

    if ($captchaResponse['success'] == '1' && $captchaResponse['action'] == $action && $captchaResponse['score'] >= 0.5 && $captchaResponse['hostname'] == $_SERVER['SERVER_NAME']) {
        echo 'Form Submitted Successfully';
    } else {
        echo 'You are not a human';
    }
}

此代码的来源。如果您想了解此代码的说明，请访问。 Google reCAPTCHA V3 integration in PHP

答案 8 :(得分：-1)

如果您是在网站上新实施Recaptcha，建议您添加api.js，并让google在1-2天内收集用户的行为数据。这种方式非常容易出错，尤其是在开始使用评分之前。

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