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feat: Bot-Detection erweitert. (#105)

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muli 2022-06-16 16:41:24 +02:00
parent 83d4694190
commit 5a089b6a2a
2 changed files with 14 additions and 1 deletions
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2
assets/js/contact_form.js
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@ -5,6 +5,7 @@ const message = document.getElementsByClassName('contact_form__message')[0];
const name = document.getElementsByClassName('contact_form__name')[0]; const name = document.getElementsByClassName('contact_form__name')[0];
const email = document.getElementsByClassName('contact_form__email')[0]; const email = document.getElementsByClassName('contact_form__email')[0];
const captcha = document.getElementsByClassName('contact_form__captcha')[0]; const captcha = document.getElementsByClassName('contact_form__captcha')[0];
const now = (new Date().getTime/1000).toFixed();
contact_form.addEventListener('submit', function(event) { contact_form.addEventListener('submit', function(event) {
event.preventDefault(); event.preventDefault();
@ -12,6 +13,7 @@ contact_form.addEventListener('submit', function(event) {
formData.append('message', message.value); formData.append('message', message.value);
formData.append('name', name.value); formData.append('name', name.value);
formData.append('email', email.value); formData.append('email', email.value);
formData.append('time_sent', now);
// If some bot entered some value, return. // If some bot entered some value, return.
if (typeof captcha.value == 'undefined') { if (typeof captcha.value == 'undefined') {

13
assets/php/contact_form.php
View File

@ -57,7 +57,18 @@ if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST['name'])) { if (empty($_POST['name'])) {
$response['errors'][] = 'Du hast keinen Namen eingegeben.'; $response['errors'][] = 'Du hast keinen Namen eingegeben.';
} }
if ($_POST['captcha'] != 'Nudelsuppe') { /*
Idee zur Bot-Erkennung:
1. Ein Bot hat das Pseudocaptcha entweder leer abgeschickt, oder sich selbst etwas ausgedacht.
2. Ein Bot schickt die Daten in unter 5s ab.
3. Ein Mensch braucht nicht länger als 60min.
*/
if (
$_POST['captcha'] != 'Nudelsuppe' ||
preg_match('d{10}', $_POST['time_sent']) != 1 ||
(preg_match('d{10}', $_POST['time_sent']) != 1 && time() - $_POST['time_sent'] < 5) ||
(preg_match('d{10}', $_POST['time_sent']) != 1 && time() - $_POST['time_sent'] > 3600)
) {
$response['errors'][] = 'Wir glauben du bist ein Bot.'; $response['errors'][] = 'Wir glauben du bist ein Bot.';
} }
} else { } else {