forked from ag_kommunikation/webseite
110 lines
3.4 KiB
PHP
110 lines
3.4 KiB
PHP
<?php
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session_start();
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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 $text;
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}
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/**
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* Sending email (Platzhalter)
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*
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* mail(): Braucht auf dem Server einen korrekt konfigurierten Mailserver
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* phpmailer: Bibliothek, der per Composer installiert wird. Tut ganz gut mit SMTP.
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*/
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function send_message_to_office($subject, $message, $name, $email) {
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return mail(
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getenv('WTF_CONTACT_TO'),
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$subject,
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$name . "\r\n" . $message,
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$additional_headers = array(
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"From" => getenv('WTF_CONTACT_FROM'),
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"Reply-To" => $email,
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"Return-Path" => getenv('WTF_RETURN_PATH'),
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),
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);
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}
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function send_response($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 $json;
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}
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function prepare_response() {
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$response = array();
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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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/**
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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' or
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time() - $_SESSION['start_time'] < 5 or
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time() - $_SESSION['start_time'] > 3600
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) {
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$response['errors'][] = 'Wir glauben du bist ein Bot.';
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}
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if (!array_key_exists('errors', $response)) {
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$subject = sanitize_text('subject');
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$message = sanitize_text('message');
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$name = sanitize_text('name');
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$email = sanitize_text('email');
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if (!send_message_to_office($subject, $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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return $response;
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}
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if ($_SERVER["REQUEST_METHOD"] == "POST") {
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$response = array();
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if (empty($_POST['action'])){
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$response['errors'][] = 'Kann eigentlich nicht passieren :/';
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} else {
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if ($_POST['action'] == 'start_session') {
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$_SESSION['start_time'] = time();
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// $response['session_start_time'] = $_SESSION['start_time'];
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// $response['session_id_before'] = session_id();
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} elseif ($_POST['action'] == 'handle_form') {
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$response = prepare_response();
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session_destroy();
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} else {
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$response['errors'][] = 'Kann eigentlich auch nicht passieren :/';
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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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