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Merge pull request #7 from metacube2/codex/implement-new-chat-age-restrictions-8f52zt

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Sitzungsbegrenzung und schnellere Chat-Ladezeiten
This commit is contained in:
Metacube
2025-11-03 18:53:58 +01:00
committed by GitHub
parent 8ef998d754 ebdaeea43f
commit a80f339887
1 changed files with 187 additions and 29 deletions
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write.php
+187 -29
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@@ -28,7 +28,8 @@ define('DB_FILE', __DIR__ . '/chat_secure.db');
define('MESSAGE_RETENTION_HOURS', 24);
define('LOG_RETENTION_MONTHS', 6);
define('ONLINE_TIMEOUT_SECONDS', 30);
define('SSE_RETRY_MS', 1000);
define('SSE_RETRY_MS', 500);
define('MAX_MESSAGES_PER_FETCH', 200);
// Rate Limiting
define('MAX_MESSAGES_PER_MINUTE', 10);
@@ -112,7 +113,17 @@ function getDB() {
FOREIGN KEY (user_id) REFERENCES users(id)
)
');
// User Sessions Table
$db->exec('
CREATE TABLE IF NOT EXISTS user_sessions (
user_id INTEGER PRIMARY KEY,
session_token TEXT NOT NULL,
last_seen DATETIME DEFAULT CURRENT_TIMESTAMP,
FOREIGN KEY (user_id) REFERENCES users(id)
)
');
// Reports Table
$db->exec('
CREATE TABLE IF NOT EXISTS reports (
@@ -194,7 +205,8 @@ function getDB() {
$db->exec('CREATE INDEX IF NOT EXISTS idx_users_age_group ON users(age_group)');
$db->exec('CREATE INDEX IF NOT EXISTS idx_blocks ON blocks(blocker_id, blocked_id)');
$db->exec('CREATE INDEX IF NOT EXISTS idx_reports_status ON reports(status)');
$db->exec('CREATE INDEX IF NOT EXISTS idx_user_sessions_last_seen ON user_sessions(last_seen)');
return $db;
}
@@ -382,6 +394,9 @@ function cleanupOldData() {
// Delete old logs (keep 6 months)
$months = LOG_RETENTION_MONTHS;
$db->exec("DELETE FROM security_logs WHERE timestamp < datetime('now', '-{$months} months')");
// Remove stale session placeholders
$db->exec("DELETE FROM user_sessions WHERE last_seen < datetime('now', '-5 minutes')");
}
// ═══════════════════════════════════════════════════════════
@@ -424,10 +439,117 @@ function updateOnlineStatus($userId) {
');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$stmt->execute();
$stmt = $db->prepare('UPDATE users SET last_seen = CURRENT_TIMESTAMP WHERE id = :user_id');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$stmt->execute();
touchUserSession($userId);
}
function generateSessionToken() {
return bin2hex(random_bytes(32));
}
function startUserSession($userId) {
if (!$userId) {
return ['allowed' => false, 'error' => 'Ungültige Benutzer-ID'];
}
$db = getDB();
$stmt = $db->prepare('SELECT session_token, last_seen FROM user_sessions WHERE user_id = :user_id');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$result = $stmt->execute();
$existing = $result->fetchArray(SQLITE3_ASSOC);
if ($existing && !empty($existing['last_seen'])) {
$secondsSinceLastSeen = time() - strtotime($existing['last_seen']);
if ($secondsSinceLastSeen < ONLINE_TIMEOUT_SECONDS) {
return [
'allowed' => false,
'error' => 'Du bist bereits auf einem anderen Gerät eingeloggt. Bitte dort zuerst ausloggen oder kurz warten.'
];
}
}
$token = generateSessionToken();
$stmt = $db->prepare('
INSERT OR REPLACE INTO user_sessions (user_id, session_token, last_seen)
VALUES (:user_id, :token, CURRENT_TIMESTAMP)
');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$stmt->bindValue(':token', $token, SQLITE3_TEXT);
$stmt->execute();
$_SESSION['session_token'] = $token;
return ['allowed' => true, 'token' => $token];
}
function touchUserSession($userId) {
if (!$userId || empty($_SESSION['session_token'])) {
return;
}
$db = getDB();
$stmt = $db->prepare('
UPDATE user_sessions
SET last_seen = CURRENT_TIMESTAMP
WHERE user_id = :user_id AND session_token = :token
');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$stmt->bindValue(':token', $_SESSION['session_token'], SQLITE3_TEXT);
$stmt->execute();
}
function clearUserSession($userId) {
if (!$userId) {
return;
}
$db = getDB();
$stmt = $db->prepare('DELETE FROM user_sessions WHERE user_id = :user_id');
$stmt->bindValue(':user_id', $userId, SQLITE3_INTEGER);
$stmt->execute();
unset($_SESSION['session_token']);
}
function validateActiveSession() {
if (!isLoggedIn()) {
return false;
}
$token = $_SESSION['session_token'] ?? null;
if (!$token) {
return false;
}
$db = getDB();
$stmt = $db->prepare('SELECT session_token, last_seen FROM user_sessions WHERE user_id = :user_id');
$stmt->bindValue(':user_id', getCurrentUserId(), SQLITE3_INTEGER);
$result = $stmt->execute();
$session = $result->fetchArray(SQLITE3_ASSOC);
if (!$session) {
return false;
}
if (!hash_equals($session['session_token'], $token)) {
return false;
}
if (!empty($session['last_seen'])) {
$secondsSinceLastSeen = time() - strtotime($session['last_seen']);
if ($secondsSinceLastSeen > ONLINE_TIMEOUT_SECONDS * 3) {
return false;
}
}
return true;
}
// ═══════════════════════════════════════════════════════════
@@ -512,9 +634,19 @@ if (isset($_POST['action']) || isset($_GET['action'])) {
$stmt->bindValue(':birthdate', $birthdate, SQLITE3_TEXT);
$stmt->bindValue(':age_group', $ageGroup, SQLITE3_TEXT);
$stmt->execute();
$dbUserId = $db->lastInsertRowID();
$sessionResult = startUserSession($dbUserId);
if (!$sessionResult['allowed']) {
logSecurityEvent($dbUserId, 'LOGIN_BLOCKED_DUPLICATE_SESSION', 'REGISTER');
echo json_encode([
'success' => false,
'error' => $sessionResult['error']
]);
exit;
}
$_SESSION['user_id'] = $dbUserId;
$_SESSION['username'] = $username;
$_SESSION['user_display_id'] = $userId;
@@ -567,18 +699,32 @@ if (isset($_POST['action']) || isset($_GET['action'])) {
// ───────────────────────────────────────────────────────
if ($action === 'logout') {
if (isLoggedIn()) {
logSecurityEvent(getCurrentUserId(), 'LOGOUT', '');
$currentUserId = getCurrentUserId();
logSecurityEvent($currentUserId, 'LOGOUT', '');
clearUserSession($currentUserId);
}
session_destroy();
echo json_encode(['success' => true]);
exit;
}
// All other actions require login
if (!isLoggedIn() && !isAdmin()) {
echo json_encode(['success' => false, 'error' => 'Nicht eingeloggt']);
exit;
}
if (isLoggedIn() && !isAdmin() && !validateActiveSession()) {
$userId = getCurrentUserId();
clearUserSession($userId);
session_destroy();
echo json_encode(['success' => false, 'error' => 'Deine Sitzung ist nicht mehr gültig. Bitte erneut einloggen.']);
exit;
}
if (isLoggedIn() && !isAdmin()) {
touchUserSession(getCurrentUserId());
}
// ───────────────────────────────────────────────────────
// PING (UPDATE ONLINE STATUS)
@@ -714,28 +860,33 @@ if (isset($_POST['action']) || isset($_GET['action'])) {
}
$query = '
SELECT
m.id,
m.from_user_id,
m.to_user_id,
m.message,
m.timestamp,
m.is_read,
m.is_flagged,
u.username as from_username,
u.user_id as from_display_id
FROM messages m
JOIN users u ON m.from_user_id = u.id
WHERE
(m.from_user_id = :current_user_id AND m.to_user_id = :other_user_id)
OR
(m.from_user_id = :other_user_id AND m.to_user_id = :current_user_id)
ORDER BY m.timestamp ASC
SELECT * FROM (
SELECT
m.id,
m.from_user_id,
m.to_user_id,
m.message,
m.timestamp,
m.is_read,
m.is_flagged,
u.username as from_username,
u.user_id as from_display_id
FROM messages m
JOIN users u ON m.from_user_id = u.id
WHERE
(m.from_user_id = :current_user_id AND m.to_user_id = :other_user_id)
OR
(m.from_user_id = :other_user_id AND m.to_user_id = :current_user_id)
ORDER BY m.id DESC
LIMIT :limit
)
ORDER BY id ASC
';
$stmt = $db->prepare($query);
$stmt->bindValue(':current_user_id', $currentUserId, SQLITE3_INTEGER);
$stmt->bindValue(':other_user_id', $otherUserId, SQLITE3_INTEGER);
$stmt->bindValue(':limit', MAX_MESSAGES_PER_FETCH, SQLITE3_INTEGER);
$result = $stmt->execute();
$messages = [];
@@ -1373,16 +1524,22 @@ if (isset($_GET['stream']) && $_GET['stream'] === 'events') {
if (!isLoggedIn()) {
exit;
}
if (!validateActiveSession()) {
exit;
}
header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
header('Connection: keep-alive');
header('X-Accel-Buffering: no');
$currentUserId = getCurrentUserId();
$currentAgeGroup = getCurrentAgeGroup();
$lastMessageId = intval($_GET['last_message_id'] ?? 0);
touchUserSession($currentUserId);
set_time_limit(0);
ob_implicit_flush(true);
while (ob_get_level() > 0) {
@@ -1461,6 +1618,7 @@ if (isset($_GET['stream']) && $_GET['stream'] === 'events') {
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="theme-color" content="#f59e0b">
<title>💬 Secure Private Chat</title>
<style>