如何在客户端和服务器端（php）中集成Google reCAPTCHA版本3。以下代码用于显示recaptcha，但它不能正常工作。如何进行这种整合。
<html>
<head>
<script src='https://www.google.com/recaptcha/api.js?render=6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD'></script>
</head>
<body>
<script>
grecaptcha.ready(function() {
grecaptcha.execute('6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD', {
action: 'action_name'
});
});
</script>
<form action="verify.php" method="post">
<input type="text" name="name" placeholder="Your name" required>
<input type="email" name="email" placeholder="Your email address" required>
<textarea name="message" placeholder="Type your message here...." required></textarea>
<input type="submit" name="submit" value="SUBMIT">
</form>
</body>
</html>
Verify.php
<?php
if(isset($_POST['g-recaptcha-response']) && !empty($_POST['g-recaptcha-response'])) {
//your site secret key
$secret = 'XXXX-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
//get verify response data
$verifyResponse = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret='.$secret.'&response='.$_POST['g-recaptcha-response']);
$responseData = json_decode($verifyResponse);
if($responseData->success):
print_r("Working Fine"); exit;
else:
print_r("No valid Key"); exit;
endif;
} else {
print_r("Not Working Captcha"); exit;
}
?>
答案 0 :(得分：13)
<html>
<head>
<script src='https://www.google.com/recaptcha/api.js?render=6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD'></script>
</head>
<body>
<script>
// when form is submit
$('form').submit(function() {
// we stoped it
event.preventDefault();
// needs for recaptacha ready
grecaptcha.ready(function() {
// do request for recaptcha token
// response is promise with passed token
grecaptcha.execute('6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD', {action: 'create_comment'}).then(function(token) {
// add token to form
$('form').prepend('<input type="hidden" name="token" value="' + token + '">');
$('form').prepend('<input type="hidden" name="action" value="create_comment">');
// submit form now
$('form').unbind('submit').submit();
});;
});
});
</script>
<form action="verify.php" method="post">
<input type="text" name="name" placeholder="Your name" required >
<input type="email" name="email" placeholder="Your email address" required>
<textarea name="message" placeholder="Type your message here...." required></textarea>
<input type="submit" name="submit" value="SUBMIT">
</form>
</body>
</html>
PHP
$token = $_POST['token'];
$secret = 'ur secret';
$action = $_POST['action'];
// now you need do a POST requst to google recaptcha server.
// url: https://www.google.com/recaptcha/api/siteverify.
// with data secret:$secret and response:$token
在代码的这一点上，您需要向ReCAPTCHA发送一个帖子请求来验证令牌，如下所示：https://www.google.com/recaptcha/api/siteverify。响应将是一个json对象，其字段为“success”（true / false）和“action” 用于比较（==）和得分（数字从0.0 - 1.0）
https://developers.google.com/recaptcha/docs/v3#api-response
您还可以为每个请求指定操作名称（create_post，update_post，create_comment ...）
答案 1 :(得分：11)
尝试一下。
<script>
grecaptcha.ready(function() {
grecaptcha.execute('<site-secret>', {action: 'MyForm'})
.then(function(token) {
console.log(token)
document.getElementById('g-recaptcha-response').value = token;
});
});
</script>
<form action="verify.php" method="post">
<input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">
<input type="text" name="name" placeholder="Your name" required >
<input type="email" name="email" placeholder="Your email address" required>
<input type="submit" name="submit" value="SUBMIT" >
</form>
答案 2 :(得分：3)
这是该示例的示例工作代码。
html辅助代码
<html>
<head>
<title>Google recapcha v3 demo - Codeforgeek</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://www.google.com/recaptcha/api.js?render=put your site key here"></script>
</head>
<body>
<h1>Google reCAPTHA Demo</h1>
<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>
<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>
</body>
</html>
PHP代码。
<?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'));
}
?>
工作正常。
演示：https://demo.codeforgeek.com/recaptcha-v3/
教程：https://codeforgeek.com/2019/02/google-recaptcha-v3-tutorial/
答案 3 :(得分：1)
我想为您提供完整的工作流，以将recaptchav3集成到ASP.NET核心MVC解决方案中。
在您的appsettings.json文件中：
"RecaptchaSettings": {
"Uri": "https://www.google.com/recaptcha/api/siteverify",
"SecretKey": "your private key"
"SiteKey": "your public key",
"Version": "v3"
}
您认为（@razor语法）：
@using Microsoft.Extensions.Configuration
@inject IConfiguration Configuration
<script src="https://www.google.com/recaptcha/api.js?render=@Configuration.GetSection("RecaptchaSettings")["SiteKey"]"></script>
<script>
grecaptcha.ready(function () {
grecaptcha.execute('@Configuration.GetSection("RecaptchaSettings")["SiteKey"]', { action: 'homepage' })
.then(function (token) {
document.getElementById('g-recaptcha-response').value = token;
});
});
</script>
并在您的表格中输入：
<form action="/">
…
<input type="hidden" id="g-recaptcha-response" name="g-recaptcha-response">
…
</form>
我创建了一个简单的方法来对其进行管理：
public async Task<bool> ChallengePassed(string uri, string gRecaptchaResponse, string secret)
{
var concUri = uri + "?secret=" + secret + "&response=" + gRecaptchaResponse;
var request = new HttpRequestMessage(HttpMethod.Get, concUri);
var res = await _Client.SendAsync(request);
if (!res.IsSuccessStatusCode)
{
return false;
}
var data = await res.Content.ReadAsStringAsync();
dynamic JSONdata = JObject.Parse(data);
if (JSONdata.success != "true")
{
return false;
}
return true;
}
#endregion
#region PRIVATE
#endregion
#endregion
#endregion
}
我只是简单地将其称为控制器：
//recaptcha validation
bool isChallengeOk = await _CaptchaVerify.ChallengePassed(_Configuration.GetValue<string>("RecaptchaSettings:Uri"), Request.Form["g-recaptcha-response"], _Configuration.GetValue<string>("RecaptchaSettings:SecretKey"));
请注意，我正在从“ _Configuration”对象设置输入参数，该对象代表Startup.cs中的配置设置对象的实例。您可以将手动输入的参数传递给该方法。
享受
答案 4 :(得分：0)
tldr;跳到底部的代码。
（如果Google在听，我们喜欢您的工作，那么请在上面的页面上链接一些更详尽的示例，将是一件很棒的事情。）
重要说明：“成功”响应参数仅指示验证码是否被成功评估，而不指示提交是否可能是垃圾邮件。
'score'参数是您需要了解的结果。分数越高（介于0到1之间的数字），则提交的内容越真实的可能性就越大，这取决于您接受的阈值（例如0.5）。
将以下行添加到HTML的开头以加载recaptcha api.js代码：
<script src="https://www.google.com/recaptcha/api.js?render=$reCAPTCHA_site_key"></script>
（其中$reCAPTCHA_site_key是您的公共“站点密钥”，我已将其保存在“ config.php”文件中。）
您需要向服务器提交令牌（从Google接收并且对于每个表单提交都是唯一的）。我认为通过POST与其余的表单数据一起发送是最简单的。为此，我在表单中包含一个隐藏字段，如下所示：
<form id="contactForm" method="post" action="contact">
<!-- other form inputs -->
<input type="hidden" id="gRecaptchaResponse" name="gRecaptchaResponse">
<input type="submit" name="contact_submit" value="Send message">
</form>
（注：“ contact”是contact.php，但我已经用.htaccess重写了网址）
现在，我们需要劫持默认表单提交以生成令牌。我们可以在页面加载时生成令牌，但是由于令牌仅在两分钟内有效（如果我正确阅读了https://developers.google.com/recaptcha/docs/verify页面），我认为最好在需要将其发送到您的站点时获取它网站的服务器。
为此，我在结束表单标签之后添加了以下内容：
<script>
contactForm.addEventListener('submit', event => {
event.preventDefault()
validate(contactForm)
});
</script>
我已经将validate(form)函数放在结束body标记之前：
function validate(form) {
//perform optional error checking on form. If no errors then request a token and put it into the hidden field
getRecaptchaToken(form)
}
//some other (optional) form validation functions
function getRecaptchaToken(form) {
grecaptcha.ready(function() {
grecaptcha.execute($reCAPTCHA_site_key, {action: 'contactForm'}).then(function(token) {
gRecaptchaResponse.value = token //set the value of the hidden field
form.submit() //submit the form
});
});
}
注释：
$reCAPTCHA_site_key是您的公共站点密钥action: 'contactForm'标识此特定内容的提交
建议您在Google reCAPTCHA信息中心中填写表单，并确认是否在后端中按预期方式进行确认
安全步骤在主PHP文件中，当收到表单提交时：
//get the IP address of the origin of the submission
$ip = $_SERVER['REMOTE_ADDR'];
//construct the url to send your private Secret Key, token and (optionally) IP address of the form submitter to Google to get a spam rating for the submission (I've saved '$reCAPTCHA_secret_key' in config.php)
$url = 'https://www.google.com/recaptcha/api/siteverify?secret=' . urlencode($reCAPTCHA_secret_key) . '&response=' . urlencode($g_recaptcha_response) . '&remoteip=' . urlencode($ip);
//save the response, e.g. print_r($response) prints { "success": true, "challenge_ts": "2019-07-24T11:19:07Z", "hostname": "your-website-domain.co.uk", "score": 0.9, "action": "contactForm" }
$response = file_get_contents($url);
//decode the response, e.g. print_r($responseKeys) prints Array ( [success] => 1 [challenge_ts] => 2019-07-24T11:19:07Z [hostname] => your-website-domain.co.uk [score] => 0.9 [action] => contactForm )
$responseKeys = json_decode($response, true);
//check if the test was done OK, if the action name is correct and if the score is above your chosen threshold (again, I've saved '$g_recaptcha_allowable_score' in config.php)
if ($responseKeys["success"] && $responseKeys["action"] == 'contactForm') {
if ($responseKeys["score"] >= $g_recaptcha_allowable_score) {
//send email with contact form submission data to site owner/ submit to database/ etc
//redirect to confirmation page or whatever you need to do
} elseif ($responseKeys["score"] < $g_recaptcha_allowable_score) {
//failed spam test. Offer the visitor the option to try again or use an alternative method of contact.
}
} elseif($responseKeys["error-codes"]) { //optional
//handle errors. See notes below for possible error codes
//personally I'm probably going to handle errors in much the same way by sending myself a the error code for debugging and offering the visitor the option to try again or use an alternative method of contact
} else {
//unkown screw up. Again, offer the visitor the option to try again or use an alternative method of contact.
}
注释：
{
"success": true|false, // whether this request was a valid reCAPTCHA token for your site
"score": number // the score for this request (0.0 - 1.0)
"action": string // the action name for this request (important to verify)
"challenge_ts": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
"hostname": string, // the hostname of the site where the reCAPTCHA was solved
"error-codes": [...] // optional
}
contact.php
<?php //contact.php
require_once('config.php');
//do server-side validation of other form fields
if (/*form has been submitted and has passed server-side validation of the other form fields*/) {
$ip = $_SERVER['REMOTE_ADDR'];
$url = 'https://www.google.com/recaptcha/api/siteverify?secret=' . urlencode($reCAPTCHA_secret_key) . '&response=' . urlencode($g_recaptcha_response) . '&remoteip=' . urlencode($ip);
$response = file_get_contents($url);
$responseKeys = json_decode($response, true);
if ($responseKeys["success"] && $responseKeys["action"] == 'contactForm') {
if ($responseKeys["score"] >= $g_recaptcha_allowable_score) {
//send email with contact form submission data to site owner/ submit to database/ etc
//redirect to confirmation page or whatever you need to do
} elseif ($responseKeys["score"] < $g_recaptcha_allowable_score) {
//failed spam test. Offer the visitor the option to try again or use an alternative method of contact.
}
} elseif($responseKeys["error-codes"]) { //optional
//handle errors. See notes below for possible error codes
//(I handle errors by sending myself an email with the error code for debugging and offering the visitor the option to try again or use an alternative method of contact)
} else {
//unkown screw up. Again, offer the visitor the option to try again or use an alternative method of contact.
}
exit;
} else { //(re)display the page with the form
echo <<<_END
<!DOCTYPE html>
<html lang="en">
<head>
<title>Contact | Your website</title>
<link rel="stylesheet" href="css/style.css">
<script src="https://www.google.com/recaptcha/api.js?render=$reCAPTCHA_site_key"></script>
</head>
<body>
<!-- header etc -->
<form id="contactForm" method="post" action="contact">
//other form inputs
<input type="hidden" id="gRecaptchaResponse" name="gRecaptchaResponse">
<input type="submit" name="contact_submit" value="Send message">
</form>
<script>
contactForm.addEventListener('submit', event => {
event.preventDefault()
validate(contactForm)
});
</script>
<!-- footer etc -->
<script>
function validate(form) {
//perform optional client-side error checking of the form. If no errors are found then request a token and put it into the hidden field. Finally submit the form.
getRecaptchaToken(form)
}
//some (optional) form field validation functions
function getRecaptchaToken(form) {
grecaptcha.ready(function() {
grecaptcha.execute($reCAPTCHA_site_key, {action: 'contactForm'}).then(function(token) {
gRecaptchaResponse.value = token
form.submit()
});
});
}
</script>
</body>
</html>
_END;
config.php
<?php //config.php
//other site settings
// Google reCAPTCHA v3 keys
// For reducing spam contact form submissions
// Site key (public)
$reCAPTCHA_site_key = 'N0t-a-real-0N3_JHbnbUJ-BLAHBLAH_Blahblah';
// Secret key
$reCAPTCHA_secret_key = 'N0t-a-real-0N3_i77tyYGH7Ty6UfG-blah';
// Min score returned from reCAPTCHA to allow form submission
$g_recaptcha_allowable_score = 0.5; //Number between 0 and 1. You choose this. Setting a number closer to 0 will let through more spam, closer to 1 and you may start to block valid submissions.