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feat: Bot-Detection erweitert. (#105)

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This commit is contained in:
muli 2022-06-16 16:41:24 +02:00
parent 24cc9f362b
commit c610679c10
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 email = document.getElementsByClassName('contact_form__email')[0];
const captcha = document.getElementsByClassName('contact_form__captcha')[0];
const now = (new Date().getTime/1000).toFixed();
contact_form.addEventListener('submit', function(event) {
event.preventDefault();
@ -12,6 +13,7 @@ contact_form.addEventListener('submit', function(event) {
formData.append('message', message.value);
formData.append('name', name.value);
formData.append('email', email.value);
formData.append('time_sent', now);
// If some bot entered some value, return.
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'])) {
$response['errors'][] = 'Du hast keinen Namen eingegeben.';
}
if ($_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.';
}
} else {