ag_kommunikation/webseite
6
4
Fork 5
Code Issues 18 Pull Requests 1 Projects Releases Activity

feat: Bot-Detection erweitert. (#105)

Browse Source
This commit is contained in:
muli 2022-06-16 16:41:24 +02:00
parent 3679f79bc5
commit e267a58b80
2 changed files with 14 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
assets/js/contact_form.js
View File

@ -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 {