Google reCaptcha响应“未捕获(承诺)为空" [英] Google reCaptcha response "Uncaught (in promise) null"

问题描述

我正在使用reCaptcha v2，但无论如何都要在开发控制台响应Uncaught (in promise) null中(并移动.reset()函数)

控制台:

我的验证码:

<div class="text-xs-center" style="text-align: center; height:150px;">
    <p style="color: black;"> Complete the verification: </p>
    <div style="display: inline-block;" class="g-recaptcha" data-sitekey="xxxxxxxxxxx" data-callback="callback"></div>
</div>

我的回调函数:

function callback() {
    if (grecaptcha === undefined) {
        alert('Recaptcha non definito'); 
        return; 
    }

    var response = grecaptcha.getResponse();
    console.log(response);

    if (!response) {
        alert('Coud not get recaptcha response'); 
        return; 
    }

    $.ajax({
    'url' : 'validate-recaptcha.php',
    'type' : 'POST',
    'data' : {
        'response' : response   
    },
    'success' : function(data) {              
        alert('Data: '+data);
    },
    'error' : function(request,error)
    {
        alert("Request: "+JSON.stringify(request));
    }
    });
    grecaptcha.reset();
}

和我的 validate-recaptcha.php :

<?php
//debug
$fp = fopen('debug.txt', 'a');
fwrite($fp, print_r($_POST, TRUE));
fclose($fp);
//enddebug

if (empty($_POST['recaptcha'])) {
    exit('Please set recaptcha variable');
}
// validate recaptcha
$response = $_POST['recaptcha'];
$post = http_build_query(
    array (
        'response' => $response,
        'secret' => 'yoursecretkey',
        'remoteip' => $_SERVER['REMOTE_ADDR']
    )
);
$opts = array('http' => 
    array (
        'method' => 'POST',
        'header' => 'application/x-www-form-urlencoded',
        'content' => $post
    )
);
$context = stream_context_create($opts);
$serverResponse = @file_get_contents('https://www.google.com/recaptcha/api/siteverify', false, $context);
if (!$serverResponse) {
    exit('Failed to validate Recaptcha');
}
$result = json_decode($serverResponse);
if (!$result -> success) {
    exit('Invalid Recaptcha');
}
exit('Recaptcha Validated');

在Internet上搜索，可能是.reset()函数的问题，但我不知道解决方案.

解决方案

我也有此错误，我发现与recaptcha回调有关(在您的情况下为data-callback="callback").如果您删除数据回调属性，则不会出现该错误.

控制台错误Uncaught (in promise) null表示回调正在等待Promise.这是使用promises进行Recaptcha的基本回调函数:

function callback() {
    return new Promise(function(resolve, reject) { 

    //Your code logic goes here

    //Instead of using 'return false', use reject()
    //Instead of using 'return' / 'return true', use resolve()
    resolve();

  }); //end promise
};

在您的情况下，您需要将代码调整为以下形式:

function callback() {
  return new Promise(function(resolve, reject) {  

    if (grecaptcha === undefined) {
        alert('Recaptcha non definito'); 
        //return;
        reject();
    }

    var response = grecaptcha.getResponse();
    console.log(response);

    if (!response) {
        alert('Coud not get recaptcha response'); 
        //return;
        reject();
    }

    $.ajax({
    'url' : 'validate-recaptcha.php',
    'type' : 'POST',
    'data' : {
        'response' : response   
    },
    'success' : function(data) {              
        alert('Data: '+data);
        resolve();
    },
    'error' : function(request,error)
    {
        alert("Request: "+JSON.stringify(request));
        reject();   
    }
    });
    grecaptcha.reset();

  }); //end promise
}

这是我的第一个回答，所以请耐心等待，让我知道我是否忘记或错过了什么:)

I'm use reCaptcha v2 but in dev console response Uncaught (in promise) null in in any case (and moving the .reset() function)

console:

my code for recaptcha:

<div class="text-xs-center" style="text-align: center; height:150px;">
    <p style="color: black;"> Complete the verification: </p>
    <div style="display: inline-block;" class="g-recaptcha" data-sitekey="xxxxxxxxxxx" data-callback="callback"></div>
</div>

my callback function:

function callback() {
    if (grecaptcha === undefined) {
        alert('Recaptcha non definito'); 
        return; 
    }

    var response = grecaptcha.getResponse();
    console.log(response);

    if (!response) {
        alert('Coud not get recaptcha response'); 
        return; 
    }

    $.ajax({
    'url' : 'validate-recaptcha.php',
    'type' : 'POST',
    'data' : {
        'response' : response   
    },
    'success' : function(data) {              
        alert('Data: '+data);
    },
    'error' : function(request,error)
    {
        alert("Request: "+JSON.stringify(request));
    }
    });
    grecaptcha.reset();
}

and my validate-recaptcha.php:

<?php
//debug
$fp = fopen('debug.txt', 'a');
fwrite($fp, print_r($_POST, TRUE));
fclose($fp);
//enddebug

if (empty($_POST['recaptcha'])) {
    exit('Please set recaptcha variable');
}
// validate recaptcha
$response = $_POST['recaptcha'];
$post = http_build_query(
    array (
        'response' => $response,
        'secret' => 'yoursecretkey',
        'remoteip' => $_SERVER['REMOTE_ADDR']
    )
);
$opts = array('http' => 
    array (
        'method' => 'POST',
        'header' => 'application/x-www-form-urlencoded',
        'content' => $post
    )
);
$context = stream_context_create($opts);
$serverResponse = @file_get_contents('https://www.google.com/recaptcha/api/siteverify', false, $context);
if (!$serverResponse) {
    exit('Failed to validate Recaptcha');
}
$result = json_decode($serverResponse);
if (!$result -> success) {
    exit('Invalid Recaptcha');
}
exit('Recaptcha Validated');

Searching on the internet, probably the problem is the .reset() function, but I do not understand the solution.

解决方案

I had this error too and I found is related with the recaptcha callback (in your case data-callback="callback"). If you remove your data-callback attribute the error won't come up.

The console error Uncaught (in promise) null indicates the callback is waiting for a promise. Here's a basic callback function for recaptcha using promises:

function callback() {
    return new Promise(function(resolve, reject) { 

    //Your code logic goes here

    //Instead of using 'return false', use reject()
    //Instead of using 'return' / 'return true', use resolve()
    resolve();

  }); //end promise
};

In your case you need to adjust your code to something like this:

function callback() {
  return new Promise(function(resolve, reject) {  

    if (grecaptcha === undefined) {
        alert('Recaptcha non definito'); 
        //return;
        reject();
    }

    var response = grecaptcha.getResponse();
    console.log(response);

    if (!response) {
        alert('Coud not get recaptcha response'); 
        //return;
        reject();
    }

    $.ajax({
    'url' : 'validate-recaptcha.php',
    'type' : 'POST',
    'data' : {
        'response' : response   
    },
    'success' : function(data) {              
        alert('Data: '+data);
        resolve();
    },
    'error' : function(request,error)
    {
        alert("Request: "+JSON.stringify(request));
        reject();   
    }
    });
    grecaptcha.reset();

  }); //end promise
}

This is my first answer in SO, so please be patient and let me know if I forgot or missed something :)

这篇关于Google reCaptcha响应“未捕获(承诺)为空"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！