我的网站上有一个简单的联系表格。验证有点微小，因为它不会进入数据库;只是一封电子邮件表格如下：
有5个字段 - 其中4个是必需的。提交被禁用，直到4个字段有效，然后您可以提交。然后在服务器上再次验证所有内容，包括recaptcha（我的客户端未验证）。整个过程使用ajax完成，并且有多个测试必须在服务器端传递或返回4 **头，并调用失败回调处理程序。
一切都像桌面上的Chrome浏览器一样（我没有尝试过其他浏览器，但我无法想象他们为什么会有所不同），但在iPhone上，即使我不检查，reCaptcha仍会验证测试框。
换句话说：我仍然需要正确填写四个值才能提交，但如果我没有选中reCaptcha的方框，请求仍然会成功。
如果有人认为这会有所帮助，我可以发布一些代码，但似乎问题出在设备而不是代码上。有没有人对此有任何见解？
注意：服务器端是PHP / Apache，如果这有用的话。
更新：2015年5月28日：
我还在调试这个，但似乎Mobile Safari忽略了我的iPhone上的响应标题。当我将响应输出到页面时，我在(data,status,xhr)桌面上获得的是：
data：我的回答，此时只是说错误或成功 - ＆gt; error
status：error
xhr：{'error',400,'error'}
On Mobile safari：
data：error
status：success
xhr：{'error',200,'success'}
所以 - 它似乎只是忽略了我的响应头。我试着明确设置{"headers":{"cache-control":"no-cache"}}，但无济于事。
更新：2015年6月3日
Per Request，这是代码。这几乎肯定比你需要的更多。由于我试图修复它所做的改变，它也变得更加迟钝。另请注意，虽然可能看起来存在尚未定义的变量，但它们（应该）已在其他文件中定义。
The client side
$('#submit').on('click', function(e) {
$(this).parents('form').find('input').each(function() {
$(this).trigger('blur');
})
var $btn = $(this);
$btn = $btn.button('loading');
var dfr = $.Deferred();
if ($(this).attr('disabled') || $(this).hasClass('disabled')) {
e.preventDefault();
e.stopImmediatePropagation();
dfr.reject();
return false;
} else {
var input = $('form').serializeArray();
var obj = {},
j;
$.each(input, function(i, a) {
if (a.name === 'person-name') {
obj.name = a.value;
} else if (a.name === 'company-name') {
obj.company_name = a.value;
} else {
j = a.name.replace(/(g-)(.*)(-response)/g, '$2');
obj[j] = a.value;
}
});
obj.action = 'recaptcha-js';
obj.remoteIp = rc.remoteiP;
rc.data = obj;
var request = $.ajax({
url: rc.ajaxurl,
type: 'post',
data: obj,
headers: {
'cache-control': 'no-cache'
}
});
var success = function(data) {
$btn.data('loadingText', 'Success');
$btn.button('reset');
$('#submit').addClass('btn-success').removeClass('btn-default');
$btn.button('loading');
dfr.resolve(data);
};
var fail = function(data) {
var reason = JSON.parse(data.responseText).reason;
$btn.delay(1000).button('reset');
switch (reason) {
case 'Recaptcha Failed':
case 'Recaptcha Not Checked':
case 'One Or more validator fields not valid or not filled out':
case 'One Or more validator fields is invalid':
// reset recaptcha
if ($('#submit').data('tries')) {
$('#submit').remove();
$('.g-recaptcha').parent().addBack().remove();
myPopover('Your request is invalid. Please reload the page to try again.');
} else {
$('#submit').data('tries', 1);
grecaptcha.reset();
myPopover('One or more of your entries are invalid. Please make corrections and try again.');
}
break;
default:
// reset page
$('#submit').remove();
$('.g-recaptcha').remove();
myPopover('There was a problem with your request. Please reload the page and try again.');
break;
}
dfr.reject(data);
};
request.done(success);
request.fail(fail);
}
The Server:
function _send_email(){
$recaptcha=false;
/* * */
if(isset($_POST['recaptcha'])):
$gRecaptchaResponse=$_POST['recaptcha'];
$remoteIp=isset($_POST['remoteIp']) ? $_POST['remoteIp'] : false;
/* ** */
if(!$remoteIp):
$response=array('status_code'=>'409','reason'=>'remoteIP not set');
echo json_encode($response);
http_response_code(409);
exit();
endif;
/* ** */
/* ** */
if($gRecaptchaResponse==''):
$response=array('status_code'=>'400','reason'=>'Recaptcha Failed');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* ** */
if($recaptcha=recaptcha_test($gRecaptchaResponse,$remoteIp)):
$recaptcha=true;
/* ** */
else:
$response=array('status_code'=>'400','reason'=>'Recaptcha Failed');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* ** */
/* * */
else:
$response=array('status_code'=>'400','reason'=>'Recaptcha Not Checked');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* * */
/* * */
if($recaptcha==1):
$name=isset($_POST['name']) ? $_POST['name'] : false;
$company_name=isset($_POST['company_name']) ? $_POST['company_name'] : false;
$phone=isset($_POST['phone']) ? $_POST['phone'] : false;
$email=isset($_POST['email']) ? $_POST['email'] : false;
/* ** */
if(isset($_POST['questions'])):
$questions=$_POST['questions']=='' ? 1 : $_POST['questions'];
/* *** */
if(!$questions=filter_var($questions,FILTER_SANITIZE_SPECIAL_CHARS)):
$response=array('status_code'=>'400','reason'=>'$questions could not be sanitized');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* *** */
/* ** */
else:
$questions=true;
endif;
/* ** */
/* ** */
if( count( array_filter( array( $name,$company_name,$phone,$email ),"filter_false" ) ) !=4 ):
$response=array('status_code'=>'400','reason'=>'One Or more validator fields not valid or not filled out');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* ** */
$company_name=filter_var($company_name,FILTER_SANITIZE_SPECIAL_CHARS);
$name=filter_var($name,FILTER_SANITIZE_SPECIAL_CHARS);
$phone=preg_replace('/[^0-9+-]/', '', $phone);
$email=filter_var($email,FILTER_VALIDATE_EMAIL);
/* ** */
if($company_name && $recaptcha && $name && $phone && $email && $questions):
$phone_str='Phone: ' . $phone;
$company_str='Company: ' . $company_name;
$email_str='Email String: ' . $email;
$name_str='Name: '.$name;
$questions=$questions==1 ? '' : $questions;
$body="$name_str\r\n\r\n$company_str\r\n\r\n$email_str\r\n\r\n$phone_str\r\n\r\n____________________\r\n\r\n$questions";
$mymail='fake@fake.com';
$headers = array();
$headers[] = "MIME-Version: 1.0";
$headers[] = "Content-type: text/plain; charset=\"utf-8\"";
$headers[] = "From: $email";
$headers[] = "X-Mailer: PHP/" . phpversion();
/* *** */
if(mail('$mymail', 'Information Request from: ' . $name,$body,implode("\r\n",$headers))):
$response=array('status_code'=>'200','reason'=>'Sent !');
echo json_encode($response);
http_response_code(200);
exit();
/* *** */
else:
$response=array('status_code'=>'400','reason'=>'One Or more validator fields is invalid');
echo json_encode($response);
http_response_code(400);
exit();
endif;
/* *** */
endif;
/* ** */
endif;
/* * */
$response=array('status_code'=>'412','reason'=>'There was an unknown error');
echo json_encode($response);
http_response_code(412);
exit();
}
function recaptcha_test($gRecaptchaResponse,$remoteIp){
$secret=$itsasecret; //removed for security;
require TEMPLATE_DIR . '/includes/lib/recaptcha/src/autoload.php';
$recaptcha = new \ReCaptcha\ReCaptcha($secret);
$resp = $recaptcha->verify($gRecaptchaResponse, $remoteIp);
if ($resp->isSuccess()) {
return true;
// verified!
} else {
$errors = $resp->getErrorCodes();
return false;
}
}
答案 0 :(得分：1)
就像那个问题iOS: Authentication using XMLHttpRequest - Handling 401 reponse一样，解决这个问题的最简单方法是忽略自然标头验证，并在回调成功时，用一些标志进行验证。
我看过一些像这样的案子，从来没有闻到过。
答案 1 :(得分：0)
你的＆＃34; remoteIP＆＃34;变量在客户端正确设置？
即使您的Ajax请求发送空值或假值，php脚本中的isset（）函数也会返回true，从而错误地填充$ remoteIp。
尝试做：
$remoteIp = $_SERVER['REMOTE_ADDR'];
Ajax只是让浏览器执行请求，因此PHP可以完美地获取用户的ip。
我确信，如果你传递错误的价值，ReCaptcha会以这种或那种方式陷入困境。
从不相信Ajax上的任何Javascript变量也更安全，因为这些变量也应被视为用户输入。
答案 2 :(得分：0)
验证码旨在防止恶意客户端（机器人），因此理论上如果客户端绕过验证码，则是服务器端问题。（但是，如果是客户端无法完成验证码，可能是服务器端问题或客户端问题。）
所以问题必须在服务器上。即使出于安全考虑，您也应该使用$_SERVER['REMOTE_ADDR']而不是$_POST['remoteIp']，因为$_POST['remoteIp']可能是伪造的（恶意客户端）。事实上，$_SERVER['REMOTE_ADDR']比客户端$_POST['remoteIp']更可靠。
答案 3 :(得分：0)
我在2或3个月前制作了一个仍然有效的脚本，试试这个：
<?php
$siteKey = ''; // Public Key
$secret = ''; // Private Key
/**
* This is a PHP library that handles calling reCAPTCHA.
* - Documentation and latest version
* https://developers.google.com/recaptcha/docs/php
* - Get a reCAPTCHA API Key
* https://www.google.com/recaptcha/admin/create
* - Discussion group
* http://groups.google.com/group/recaptcha
*
* @copyright Copyright (c) 2014, Google Inc.
* @link http://www.google.com/recaptcha
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/**
* A ReCaptchaResponse is returned from checkAnswer().
*/
class ReCaptchaResponse
{
public $success;
public $errorCodes;
}
class ReCaptcha
{
private static $_signupUrl = "https://www.google.com/recaptcha/admin";
private static $_siteVerifyUrl =
"https://www.google.com/recaptcha/api/siteverify?";
private $_secret;
private static $_version = "php_1.0";
/**
* Constructor.
*
* @param string $secret shared secret between site and ReCAPTCHA server.
*/
function ReCaptcha($secret)
{
if ($secret == null || $secret == "") {
die("To use reCAPTCHA you must get an API key from <a href='"
. self::$_signupUrl . "'>" . self::$_signupUrl . "</a>");
}
$this->_secret=$secret;
}
/**
* Encodes the given data into a query string format.
*
* @param array $data array of string elements to be encoded.
*
* @return string - encoded request.
*/
private function _encodeQS($data)
{
$req = "";
foreach ($data as $key => $value) {
$req .= $key . '=' . urlencode(stripslashes($value)) . '&';
}
// Cut the last '&'
$req=substr($req, 0, strlen($req)-1);
return $req;
}
/**
* Submits an HTTP GET to a reCAPTCHA server.
*
* @param string $path url path to recaptcha server.
* @param array $data array of parameters to be sent.
*
* @return array response
*/
private function _submitHTTPGet($path, $data)
{
$req = $this->_encodeQS($data);
$response = file_get_contents($path . $req);
return $response;
}
/**
* Calls the reCAPTCHA siteverify API to verify whether the user passes
* CAPTCHA test.
*
* @param string $remoteIp IP address of end user.
* @param string $response response string from recaptcha verification.
*
* @return ReCaptchaResponse
*/
public function verifyResponse($remoteIp, $response)
{
// Discard empty solution submissions
if ($response == null || strlen($response) == 0) {
$recaptchaResponse = new ReCaptchaResponse();
$recaptchaResponse->success = false;
$recaptchaResponse->errorCodes = 'missing-input';
return $recaptchaResponse;
}
$getResponse = $this->_submitHttpGet(
self::$_siteVerifyUrl,
array (
'secret' => $this->_secret,
'remoteip' => $remoteIp,
'v' => self::$_version,
'response' => $response
)
);
$answers = json_decode($getResponse, true);
$recaptchaResponse = new ReCaptchaResponse();
if (trim($answers ['success']) == true) {
$recaptchaResponse->success = true;
} else {
$recaptchaResponse->success = false;
$recaptchaResponse->errorCodes = $answers [error-codes];
}
return $recaptchaResponse;
}
}
$reCaptcha = new ReCaptcha($secret);
if(isset($_POST["g-recaptcha-response"])) {
$resp = $reCaptcha->verifyResponse(
$_SERVER["REMOTE_ADDR"],
$_POST["g-recaptcha-response"]
);
if ($resp != null && $resp->success) {echo "OK";}
else {echo "CAPTCHA incorrect";}
}
?>
<html>
<head>
<title>Google reCAPTCHA</title>
<script src="https://www.google.com/recaptcha/api.js"></script>
</head>
<body>
<form action="reCAPTCHA.php" method="POST">
<input type="submit" value="Submit">
<div class="g-recaptcha" data-sitekey="<?php echo $siteKey; ?>"></div>
</form>
</body>
</html>
通常，它应该可以工作（只需添加你的私钥和你的公钥），我在2秒前在我的iPhone SE上测试过，它运行得很好。