到目前为止，我一直在使用 Google Recaptcha v2，但现在我想使用最新版本 (v3) 更新我的 WebApp。
任何人都可以为基本表单添加一个完全工作的 Google Recaptcha v3 示例，因为我找不到它的任何工作演示吗？
我真的很感激。
非常感谢。
PS：我在服务器端使用Java Servlets，但如果你解释使用PHP 或其他什么都没关系。
问问题
200926 次
8 回答
118
实现 ReCaptcha v3 的简单代码
基本的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>
基本的 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']
);
// use json_decode to extract json response
$response = json_decode($response);
if ($response->success === false) {
//Do something with error
}
}
//... The Captcha is valid you can continue with the rest of your code
//... Add code to filter access using $response . score
if ($response->success==true && $response->score <= 0.5) {
//Do something to denied access
}
您必须使用 $response.score 的值过滤访问。它的取值范围为 0.0 到 1.0，其中 1.0 表示用户与您的网站的最佳交互，0.0 表示最差的交互（如机器人）。您可以在ReCaptcha 文档中看到一些使用示例。
于 2019-01-09T20:47:26.783 回答
20
我认为使用 Bootstrap 4 形式的 PHP 中功能齐全的 reCaptcha v3 示例演示可能对某些人有用。
参考显示的依赖项，交换您的电子邮件地址和密钥（在此处创建您自己的密钥），该表单已准备好进行测试和使用。我做了代码注释以更好地阐明逻辑，还包括注释掉的控制台日志和 print_r 行，以便快速查看验证令牌和从 Google 生成的数据。
包含的 jQuery 函数是可选的，尽管它确实在此演示中创建了更好的用户提示体验。
PHP 文件 ( mail.php):
在注明的地方添加密钥（2 个位置）和电子邮件地址。
<?php
if ($_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>
Bootstrap CSS 依赖和 reCaptcha 客户端验证标签
之间<head>的位置 - 在注明的位置粘贴您自己的站点密钥。
<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>
放置在<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;
});
// refresh token every minute to prevent expiration
setInterval(function(){
grecaptcha.execute('your-site-key-here', {action: 'homepage'}).then(function(token) {
console.log( 'refreshed token:', token );
document.getElementById("token").value = token;
});
}, 60000);
});
</script>
<!-- References for the optional 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 UX ( ) 的可选 jQuery 函数form.js：
(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);
于 2020-02-03T09:27:07.650 回答
6
我假设您有站点密钥和密钥。按照这个步骤。
在您的 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，请务必使用 jQuery 来轻松处理事件。
这是简单的形式。
<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。这是如何做到这一点的。
<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'));
}
?>
这是教程链接：https ://codeforgeek.com/2019/02/google-recaptcha-v3-tutorial/
希望能帮助到你。
于 2019-02-06T18:01:14.107 回答
3
我看过大多数不能正常工作的文章，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。
我以非常简单的方式向您解释。在这段代码中，我每隔 3 秒的时间间隔在客户端生成一个 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格，那么它可能会过期。
首先，我有一个 index.php 文件，我将在其中编写 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);
$('#action').val('application_form');
});
});
}, 3000);
});
</script>
</body>
</html>
接下来，我创建了 recaptcha.php 文件以在服务器端执行它
<?php
if ($_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解释，请访问。PHP 中的 Google reCAPTCHA V3 集成
于 2020-05-05T17:43:37.600 回答
3
我们仅使用recaptcha-V3 来查看站点流量质量，并将其用作非阻塞。由于recaptcha-V3 不需要在现场显示并且可以用作隐藏，但您必须显示recaptcha 隐私等链接（推荐）
头部中的脚本标记
<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，这是我们的具体要求
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,
];
}
}
我们得到分数并保存在我们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/
于 2019-09-16T07:02:48.913 回答
2
我通过角度 ajax 调用处理 PHP 上的 POST。我也喜欢看谷歌的分数。
这对我很有效......
$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.'"}';
}
}
在 HTML 上
<input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">
关于js
$scope.grabCaptchaV3=function(){
var myCaptcha = angular.element('#g-recaptcha-response').val();
var params = {
method: 'POST',
url: 'api/recaptcha.php',
headers: {
'Content-Type': undefined
},
data: {'g-recaptcha-response' : myCaptcha }
}
$http(params).then(function(result){
console.log(result.data);
}, function(response){
console.log(response.statusText);
});
}
于 2020-11-16T16:17:52.050 回答
1
对于“基本形式”（如原始问题所问），如果您满足在服务器上进行验证，那么所需的内容很简单。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>
这是处理它的完整页面，为简单起见，使用 Classic ASP (filename = 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') );
%>
几点注意事项：
- 您将提供自己的 SITE_KEY 和 SECRET_KEY。
- 您将需要一个 JSON 解析器。
- 您将使用适合您服务器的方法执行服务器端 POST。
- 我添加了一个简单的表单字段验证，以便您了解如何集成它。
- 您可以将“action”字符串设置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。
- 您可能希望对不正确的 response.success 或与您的操作字符串不匹配的 response.action 做出不同的响应，或者进行其他错误检查。
- 您可能需要 "> 0.5" 以外的分数条件。
- 此代码与两分钟超时没有问题。
于 2021-04-07T19:41:27.737 回答
0
如果您是在您的网站上新实施 recaptcha，我建议您添加 api.js 并让谷歌在 1-2 天内收集您用户的行为数据。这种方式非常安全，尤其是在开始使用 score 之前。
于 2020-05-03T11:42:21.767 回答