2022-06-16 13:02:42 +02:00
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<?php
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$message = '';
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$name = '';
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$email = '';
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function sanitize_text(string $name) {
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$text = filter_var($_POST[$name], FILTER_SANITIZE_FULL_SPECIAL_CHARS);
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$text = trim($text);
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$text = stripslashes($text);
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$text = htmlspecialchars($text);
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return $text;
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}
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/**
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* Sending email (Platzhalter)
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*
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* mail(): Braucht auf dem Server einen korrekt konfigurierten Mailserver
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* phpmailer: Bibliothek, der per Composer installiert wird. Tut ganz gut mit SMTP.
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*/
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function send_message_to_office($message, $name, $email) {
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return true;
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}
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function send_response($response_data) {
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$json = json_encode($response_data);
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if ($json === false) {
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// Avoid echo of empty string (which is invalid JSON), and
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// JSONify the error message instead:
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$json = json_encode(["jsonError" => json_last_error_msg()]);
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if ($json === false) {
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// This should not happen, but …
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$json = '{"jsonError":"unknown"}';
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}
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// Set HTTP response status code to: 500 - Internal Server Error
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http_response_code(500);
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}
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header('Content-type: application/json');
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echo $json;
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}
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if ($_SERVER["REQUEST_METHOD"] == "POST") {
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$response = array();
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if (
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empty($_POST['message']) ||
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empty($_POST['email']) ||
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empty($_POST['name']) ||
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$_POST['captcha'] != 'Nudelsuppe'
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) {
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if (empty($_POST['message'])) {
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$response['errors'][] = 'Du hast keine Nachricht eingegeben.';
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}
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if (empty($_POST['email'])) {
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$response['errors'][] = 'Du hast keine E-Mail-Adresse eingegeben.';
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}
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if (empty($_POST['name'])) {
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$response['errors'][] = 'Du hast keinen Namen eingegeben.';
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}
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2022-06-16 16:41:24 +02:00
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/*
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Idee zur Bot-Erkennung:
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1. Ein Bot hat das Pseudocaptcha entweder leer abgeschickt, oder sich selbst etwas ausgedacht.
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2. Ein Bot schickt die Daten in unter 5s ab.
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3. Ein Mensch braucht nicht länger als 60min.
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*/
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if (
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$_POST['captcha'] != 'Nudelsuppe' ||
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preg_match('d{10}', $_POST['time_sent']) != 1 ||
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(preg_match('d{10}', $_POST['time_sent']) != 1 && time() - $_POST['time_sent'] < 5) ||
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(preg_match('d{10}', $_POST['time_sent']) != 1 && time() - $_POST['time_sent'] > 3600)
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) {
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2022-06-16 13:02:42 +02:00
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$response['errors'][] = 'Wir glauben du bist ein Bot.';
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}
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} else {
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$message = sanitize_text('message');
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$name = sanitize_text('name');
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$email = sanitize_text('email');
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if (!send_message_to_office($message, $name, $email)) {
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$response['errors'][] = 'Deine Nachricht konnte nicht übermittelt werden.';
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} else {
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$response['status'] = 'ok';
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}
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}
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send_response($response);
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} else {
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http_response_code(404);
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}
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