mirror of
https://github.com/moodle/moodle.git
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1071 lines
40 KiB
PHP
Executable File
1071 lines
40 KiB
PHP
Executable File
#!/usr/bin/php -q
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<?php
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// Browser quirks
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define('QUIRK_CHUNK_UPDATE', 0x0001);
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// Connection telltale
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define('CHAT_CONNECTION', 0x10);
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// Connections: Incrementing sequence, 0x10 to 0x1f
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define('CHAT_CONNECTION_CHANNEL', 0x11);
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// Sidekick telltale
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define('CHAT_SIDEKICK', 0x20);
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// Sidekicks: Incrementing sequence, 0x21 to 0x2f
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define('CHAT_SIDEKICK_USERS', 0x21);
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define('CHAT_SIDEKICK_MESSAGE', 0x22);
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define('CHAT_SIDEKICK_BEEP', 0x23);
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$phpversion = phpversion();
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echo 'Moodle chat daemon v1.0 on PHP '.$phpversion." (\$Id$)\n\n";
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/// Set up all the variables we need /////////////////////////////////////
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/// $CFG variables are now defined in database by chat/lib.php
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$_SERVER['PHP_SELF'] = 'dummy';
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$_SERVER['SERVER_NAME'] = 'dummy';
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$_SERVER['HTTP_USER_AGENT'] = 'dummy';
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define('NO_MOODLE_COOKIES', true); // session not used here
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include('../../config.php');
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include('lib.php');
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$_SERVER['SERVER_NAME'] = $CFG->chat_serverhost;
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$_SERVER['PHP_SELF'] = "http://$CFG->chat_serverhost:$CFG->chat_serverport/mod/chat/chatd.php";
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$safemode = ini_get('safe_mode');
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if($phpversion < '4.3') {
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die("Error: The Moodle chat daemon requires at least PHP version 4.3 to run.\n Since your version is $phpversion, you have to upgrade.\n\n");
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}
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if(!empty($safemode)) {
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die("Error: Cannot run with PHP safe_mode = On. Turn off safe_mode in php.ini.\n");
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}
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$passref = ini_get('allow_call_time_pass_reference');
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if(empty($passref)) {
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die("Error: Cannot run with PHP allow_call_time_pass_reference = Off. Turn on allow_call_time_pass_reference in php.ini.\n");
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}
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@set_time_limit (0);
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set_magic_quotes_runtime(0);
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error_reporting(E_ALL);
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function chat_empty_connection() {
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return array('sid' => NULL, 'handle' => NULL, 'ip' => NULL, 'port' => NULL, 'groupid' => NULL);
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}
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class ChatConnection {
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// Chat-related info
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var $sid = NULL;
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var $type = NULL;
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//var $groupid = NULL;
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// PHP-level info
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var $handle = NULL;
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// TCP/IP
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var $ip = NULL;
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var $port = NULL;
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function ChatConnection($resource) {
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$this->handle = $resource;
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@socket_getpeername($this->handle, &$this->ip, &$this->port);
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}
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}
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class ChatDaemon {
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var $_resetsocket = false;
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var $_readytogo = false;
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var $_logfile = false;
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var $_trace_to_console = true;
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var $_trace_to_stdout = true;
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var $_logfile_name = 'chatd.log';
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var $_last_idle_poll = 0;
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var $conn_ufo = array(); // Connections not identified yet
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var $conn_side = array(); // Sessions with sidekicks waiting for the main connection to be processed
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var $conn_half = array(); // Sessions that have valid connections but not all of them
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var $conn_sets = array(); // Sessions with complete connection sets sets
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var $sets_info = array(); // Keyed by sessionid exactly like conn_sets, one of these for each of those
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var $chatrooms = array(); // Keyed by chatid, holding arrays of data
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// IMPORTANT: $conn_sets, $sets_info and $chatrooms must remain synchronized!
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// Pay extra attention when you write code that affects any of them!
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function ChatDaemon() {
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$this->_trace_level = E_ALL ^ E_USER_NOTICE;
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$this->_pcntl_exists = function_exists('pcntl_fork');
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$this->_time_rest_socket = 20;
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$this->_beepsoundsrc = $GLOBALS['CFG']->wwwroot.'/mod/chat/beep.wav';
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$this->_freq_update_records = 20;
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$this->_freq_poll_idle_chat = $GLOBALS['CFG']->chat_old_ping;
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$this->_stdout = fopen('php://stdout', 'w');
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if($this->_stdout) {
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// Avoid double traces for everything
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$this->_trace_to_console = false;
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}
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}
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function error_handler ($errno, $errmsg, $filename, $linenum, $vars) {
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// Checks if an error needs to be suppressed due to @
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if(error_reporting() != 0) {
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$this->trace($errmsg.' on line '.$linenum, $errno);
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}
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return true;
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}
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function poll_idle_chats($now) {
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$this->trace('Polling chats to detect disconnected users');
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if(!empty($this->chatrooms)) {
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foreach($this->chatrooms as $chatid => $chatroom) {
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if(!empty($chatroom['users'])) {
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foreach($chatroom['users'] as $sessionid => $userid) {
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// We will be polling each user as required
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$this->trace('...shall we poll '.$sessionid.'?');
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if($this->sets_info[$sessionid]['chatuser']->lastmessageping < $this->_last_idle_poll) {
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$this->trace('YES!');
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// This user hasn't been polled since his last message
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if($this->write_data($this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL], '<!-- poll -->') === false) {
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// User appears to have disconnected
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$this->disconnect_session($sessionid);
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}
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}
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}
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}
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}
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}
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$this->_last_idle_poll = $now;
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}
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function query_start() {
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return $this->_readytogo;
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}
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function trace($message, $level = E_USER_NOTICE) {
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$severity = '';
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switch($level) {
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case E_USER_WARNING: $severity = '*IMPORTANT* '; break;
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case E_USER_ERROR: $severity = ' *CRITICAL* '; break;
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case E_NOTICE:
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case E_WARNING: $severity = ' *CRITICAL* [php] '; break;
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}
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$date = date('[Y-m-d H:i:s] ');
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$message = $date.$severity.$message."\n";
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if ($this->_trace_level & $level) {
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// It is accepted for output
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// Error-class traces go to STDERR too
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if($level & E_USER_ERROR) {
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fwrite(STDERR, $message);
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}
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// Emit the message to wherever we should
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if($this->_trace_to_stdout) {
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fwrite($this->_stdout, $message);
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fflush($this->_stdout);
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}
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if($this->_trace_to_console) {
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echo $message;
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flush();
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}
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if($this->_logfile) {
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fwrite($this->_logfile, $message);
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fflush($this->_logfile);
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}
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}
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}
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function write_data($connection, $text) {
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$written = @socket_write($connection, $text, strlen($text));
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if($written === false) {
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// $this->trace("socket_write() failed: reason: " . socket_strerror(socket_last_error($connection)));
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return false;
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}
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return true;
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// Enclosing the above code inside this blocks makes sure that
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// "a socket write operation will not block". I 'm not so sure
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// if this is needed, as we have a nonblocking socket anyway.
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// If trouble starts to creep up, we 'll restore this.
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// $check_socket = array($connection);
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// $socket_changed = socket_select($read = NULL, $check_socket, $except = NULL, 0, 0);
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// if($socket_changed > 0) {
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//
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// // ABOVE CODE GOES HERE
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//
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// }
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// return false;
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}
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function user_lazy_update($sessionid) {
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global $DB;
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// TODO: this can and should be written as a single UPDATE query
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if(empty($this->sets_info[$sessionid])) {
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$this->trace('user_lazy_update() called for an invalid SID: '.$sessionid, E_USER_WARNING);
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return false;
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}
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$now = time();
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// We 'll be cheating a little, and NOT updating the record data as
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// often as we can, so that we save on DB queries (imagine MANY users)
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if($now - $this->sets_info[$sessionid]['lastinfocommit'] > $this->_freq_update_records) {
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// commit to permanent storage
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$this->sets_info[$sessionid]['lastinfocommit'] = $now;
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$DB->update_record('chat_users', $this->sets_info[$sessionid]['chatuser']);
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}
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return true;
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}
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function get_user_window($sessionid) {
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global $CFG;
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static $str;
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$info = &$this->sets_info[$sessionid];
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course_setup($info['course'], $info['user']);
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$timenow = time();
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if (empty($str)) {
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$str->idle = get_string("idle", "chat");
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$str->beep = get_string("beep", "chat");
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$str->day = get_string("day");
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$str->days = get_string("days");
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$str->hour = get_string("hour");
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$str->hours = get_string("hours");
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$str->min = get_string("min");
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$str->mins = get_string("mins");
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$str->sec = get_string("sec");
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$str->secs = get_string("secs");
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$str->years = get_string('years');
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}
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ob_start();
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echo '<html><head>';
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echo '<script text="text/javascript">';
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echo "//<![CDATA[\n";
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echo 'function openpopup(url,name,options,fullscreen) {';
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echo 'fullurl = "'.$CFG->wwwroot.'" + url;';
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echo 'windowobj = window.open(fullurl,name,options);';
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echo 'if (fullscreen) {';
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echo ' windowobj.moveTo(0,0);';
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echo ' windowobj.resizeTo(screen.availWidth,screen.availHeight); ';
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echo '}';
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echo 'windowobj.focus();';
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echo 'return false;';
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echo "}\n//]]>\n";
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echo '</script></head><body style="font-face: serif;" bgcolor="#FFFFFF">';
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echo '<table style="width: 100%;"><tbody>';
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// Get the users from that chatroom
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$users = $this->chatrooms[$info['chatid']]['users'];
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foreach ($users as $usersessionid => $userid) {
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// Fetch each user's sessionid and then the rest of his data from $this->sets_info
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$userinfo = $this->sets_info[$usersessionid];
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$lastping = $timenow - $userinfo['chatuser']->lastmessageping;
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$popuppar = '\'/user/view.php?id='.$userinfo['user']->id.'&course='.$userinfo['courseid'].'\',\'user'.$userinfo['chatuser']->id.'\',\'\'';
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echo '<tr><td width="35">';
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echo '<a target="_new" onclick="return openpopup('.$popuppar.');" href="'.$CFG->wwwroot.'/user/view.php?id='.$userinfo['chatuser']->id.'&course='.$userinfo['courseid'].'">';
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print_user_picture($userinfo['user']->id, 0, $userinfo['user']->picture, false, false, false);
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echo "</a></td><td valign=\"center\">";
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echo "<p><font size=\"1\">";
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echo fullname($userinfo['user'])."<br />";
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echo "<font color=\"#888888\">$str->idle: ".format_time($lastping, $str)."</font> ";
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echo '<a target="empty" href="http://'.$CFG->chat_serverhost.':'.$CFG->chat_serverport.'/?win=beep&beep='.$userinfo['user']->id.
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'&chat_sid='.$sessionid.'">'.$str->beep."</a>\n";
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echo "</font></p>";
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echo "<td></tr>";
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}
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echo '</tbody></table>';
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// About 2K of HTML comments to force browsers to render the HTML
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// echo $GLOBALS['CHAT_DUMMY_DATA'];
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echo "</body>\n</html>\n";
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return ob_get_clean();
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}
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function new_ufo_id() {
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static $id = 0;
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if($id++ === 0x1000000) { // Cycling very very slowly to prevent overflow
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$id = 0;
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}
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return $id;
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}
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function process_sidekicks($sessionid) {
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if(empty($this->conn_side[$sessionid])) {
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return true;
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}
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foreach($this->conn_side[$sessionid] as $sideid => $sidekick) {
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// TODO: is this late-dispatch working correctly?
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$this->dispatch_sidekick($sidekick['handle'], $sidekick['type'], $sessionid, $sidekick['customdata']);
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unset($this->conn_side[$sessionid][$sideid]);
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}
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return true;
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}
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function dispatch_sidekick($handle, $type, $sessionid, $customdata) {
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global $CFG, $DB;
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switch($type) {
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case CHAT_SIDEKICK_BEEP:
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// Incoming beep
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$msg = &New stdClass;
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$msg->chatid = $this->sets_info[$sessionid]['chatid'];
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$msg->userid = $this->sets_info[$sessionid]['userid'];
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$msg->groupid = $this->sets_info[$sessionid]['groupid'];
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$msg->system = 0;
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$msg->message = 'beep '.$customdata['beep'];
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$msg->timestamp = time();
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// Commit to DB
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$DB->insert_record('chat_messages', $msg, false);
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$DB->insert_record('chat_messages_current', $msg, false);
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// OK, now push it out to all users
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$this->message_broadcast($msg, $this->sets_info[$sessionid]['user']);
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// Update that user's lastmessageping
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$this->sets_info[$sessionid]['chatuser']->lastping = $msg->timestamp;
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$this->sets_info[$sessionid]['chatuser']->lastmessageping = $msg->timestamp;
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$this->user_lazy_update($sessionid);
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// We did our work, but before slamming the door on the poor browser
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// show the courtesy of responding to the HTTP request. Otherwise, some
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// browsers decide to get vengeance by flooding us with repeat requests.
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$header = "HTTP/1.1 200 OK\n";
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$header .= "Connection: close\n";
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$header .= "Date: ".date('r')."\n";
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$header .= "Server: Moodle\n";
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$header .= "Content-Type: text/html\n";
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$header .= "Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT\n";
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$header .= "Cache-Control: no-cache, must-revalidate\n";
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$header .= "Expires: Wed, 4 Oct 1978 09:32:45 GMT\n";
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$header .= "\n";
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// That's enough headers for one lousy dummy response
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$this->write_data($handle, $header);
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// All done
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break;
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case CHAT_SIDEKICK_USERS:
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// A request to paint a user window
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$content = $this->get_user_window($sessionid);
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$header = "HTTP/1.1 200 OK\n";
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$header .= "Connection: close\n";
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$header .= "Date: ".date('r')."\n";
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$header .= "Server: Moodle\n";
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$header .= "Content-Type: text/html\n";
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$header .= "Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT\n";
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$header .= "Cache-Control: no-cache, must-revalidate\n";
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$header .= "Expires: Wed, 4 Oct 1978 09:32:45 GMT\n";
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$header .= "Content-Length: ".strlen($content)."\n";
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// The refresh value is 2 seconds higher than the configuration variable because we are doing JS refreshes all the time.
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// However, if the JS doesn't work for some reason, we still want to refresh once in a while.
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$header .= "Refresh: ".(intval($CFG->chat_refresh_userlist) + 2)."; url=http://$CFG->chat_serverhost:$CFG->chat_serverport/?win=users&".
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"chat_sid=".$sessionid."\n";
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$header .= "\n";
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// That's enough headers for one lousy dummy response
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$this->trace('writing users http response to handle '.$handle);
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$this->write_data($handle, $header . $content);
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// Update that user's lastping
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$this->sets_info[$sessionid]['chatuser']->lastping = time();
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$this->user_lazy_update($sessionid);
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break;
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case CHAT_SIDEKICK_MESSAGE:
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// Incoming message
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// Browser stupidity protection from duplicate messages:
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$messageindex = intval($customdata['index']);
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if($this->sets_info[$sessionid]['lastmessageindex'] >= $messageindex) {
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// We have already broadcasted that!
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// $this->trace('discarding message with stale index');
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break;
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}
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else {
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// Update our info
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$this->sets_info[$sessionid]['lastmessageindex'] = $messageindex;
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}
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$msg = &New stdClass;
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$msg->chatid = $this->sets_info[$sessionid]['chatid'];
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$msg->userid = $this->sets_info[$sessionid]['userid'];
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$msg->groupid = $this->sets_info[$sessionid]['groupid'];
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$msg->system = 0;
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$msg->message = urldecode($customdata['message']); // have to undo the browser's encoding
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$msg->timestamp = time();
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if(empty($msg->message)) {
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// Someone just hit ENTER, send them on their way
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break;
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}
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// A slight hack to prevent malformed SQL inserts
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$origmsg = $msg->message;
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$msg->message = $msg->message;
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// Commit to DB
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$DB->insert_record('chat_messages', $msg, false);
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$DB->insert_record('chat_messages_current', $msg, false);
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// Undo the hack
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$msg->message = $origmsg;
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// OK, now push it out to all users
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$this->message_broadcast($msg, $this->sets_info[$sessionid]['user']);
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// Update that user's lastmessageping
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$this->sets_info[$sessionid]['chatuser']->lastping = $msg->timestamp;
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$this->sets_info[$sessionid]['chatuser']->lastmessageping = $msg->timestamp;
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$this->user_lazy_update($sessionid);
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// We did our work, but before slamming the door on the poor browser
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// show the courtesy of responding to the HTTP request. Otherwise, some
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// browsers decide to get vengeance by flooding us with repeat requests.
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$header = "HTTP/1.1 200 OK\n";
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$header .= "Connection: close\n";
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$header .= "Date: ".date('r')."\n";
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$header .= "Server: Moodle\n";
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$header .= "Content-Type: text/html\n";
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$header .= "Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT\n";
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$header .= "Cache-Control: no-cache, must-revalidate\n";
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$header .= "Expires: Wed, 4 Oct 1978 09:32:45 GMT\n";
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$header .= "\n";
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// That's enough headers for one lousy dummy response
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$this->write_data($handle, $header);
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// All done
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break;
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}
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|
|
socket_shutdown($handle);
|
|
socket_close($handle);
|
|
}
|
|
|
|
function promote_final($sessionid, $customdata) {
|
|
global $DB;
|
|
|
|
if(isset($this->conn_sets[$sessionid])) {
|
|
$this->trace('Set cannot be finalized: Session '.$sessionid.' is already active');
|
|
return false;
|
|
}
|
|
|
|
$chatuser = $DB->get_record('chat_users', array('sid'=>$sessionid));
|
|
if($chatuser === false) {
|
|
$this->dismiss_half($sessionid);
|
|
return false;
|
|
}
|
|
$chat = $DB->get_record('chat', array('id'=>$chatuser->chatid));
|
|
if($chat === false) {
|
|
$this->dismiss_half($sessionid);
|
|
return false;
|
|
}
|
|
$user = $DB->get_record('user', array('id'=>$chatuser->userid));
|
|
if($user === false) {
|
|
$this->dismiss_half($sessionid);
|
|
return false;
|
|
}
|
|
$course = $DB->get_record('course', array('id'=>$chat->course));
|
|
if($course === false) {
|
|
$this->dismiss_half($sessionid);
|
|
return false;
|
|
}
|
|
|
|
global $CHAT_HTMLHEAD_JS, $CFG;
|
|
|
|
$this->conn_sets[$sessionid] = $this->conn_half[$sessionid];
|
|
|
|
// This whole thing needs to be purged of redundant info, and the
|
|
// code base to follow suit. But AFTER development is done.
|
|
$this->sets_info[$sessionid] = array(
|
|
'lastinfocommit' => 0,
|
|
'lastmessageindex' => 0,
|
|
'course' => $course,
|
|
'courseid' => $course->id,
|
|
'chatuser' => $chatuser,
|
|
'chatid' => $chat->id,
|
|
'user' => $user,
|
|
'userid' => $user->id,
|
|
'groupid' => $chatuser->groupid,
|
|
'lang' => $chatuser->lang,
|
|
'quirks' => $customdata['quirks']
|
|
);
|
|
|
|
// If we know nothing about this chatroom, initialize it and add the user
|
|
if(!isset($this->chatrooms[$chat->id]['users'])) {
|
|
$this->chatrooms[$chat->id]['users'] = array($sessionid => $user->id);
|
|
}
|
|
else {
|
|
// Otherwise just add the user
|
|
$this->chatrooms[$chat->id]['users'][$sessionid] = $user->id;
|
|
}
|
|
|
|
// $this->trace('QUIRKS value for this connection is '.$customdata['quirks']);
|
|
|
|
$this->dismiss_half($sessionid, false);
|
|
$this->write_data($this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL], $CHAT_HTMLHEAD_JS);
|
|
$this->trace('Connection accepted: '.$this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL].', SID: '.$sessionid.' UID: '.$chatuser->userid.' GID: '.$chatuser->groupid, E_USER_WARNING);
|
|
|
|
// Finally, broadcast the "entered the chat" message
|
|
|
|
$msg = new stdClass;
|
|
$msg->chatid = $chatuser->chatid;
|
|
$msg->userid = $chatuser->userid;
|
|
$msg->groupid = $chatuser->groupid;
|
|
$msg->system = 1;
|
|
$msg->message = 'enter';
|
|
$msg->timestamp = time();
|
|
|
|
$DB->insert_record('chat_messages', $msg, false);
|
|
$DB->insert_record('chat_messages_current', $msg, false);
|
|
$this->message_broadcast($msg, $this->sets_info[$sessionid]['user']);
|
|
|
|
return true;
|
|
}
|
|
|
|
function promote_ufo($handle, $type, $sessionid, $customdata) {
|
|
if(empty($this->conn_ufo)) {
|
|
return false;
|
|
}
|
|
foreach($this->conn_ufo as $id => $ufo) {
|
|
if($ufo->handle == $handle) {
|
|
// OK, got the id of the UFO, but what is it?
|
|
|
|
if($type & CHAT_SIDEKICK) {
|
|
// Is the main connection ready?
|
|
if(isset($this->conn_sets[$sessionid])) {
|
|
// Yes, so dispatch this sidekick now and be done with it
|
|
//$this->trace('Dispatching sidekick immediately');
|
|
$this->dispatch_sidekick($handle, $type, $sessionid, $customdata);
|
|
$this->dismiss_ufo($handle, false);
|
|
}
|
|
else {
|
|
// No, so put it in the waiting list
|
|
$this->trace('sidekick waiting');
|
|
$this->conn_side[$sessionid][] = array('type' => $type, 'handle' => $handle, 'customdata' => $customdata);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// If it's not a sidekick, at this point it can only be da man
|
|
|
|
if($type & CHAT_CONNECTION) {
|
|
// This forces a new connection right now...
|
|
$this->trace('Incoming connection from '.$ufo->ip.':'.$ufo->port);
|
|
|
|
// Do we have such a connection active?
|
|
if(isset($this->conn_sets[$sessionid])) {
|
|
// Yes, so regrettably we cannot promote you
|
|
$this->trace('Connection rejected: session '.$sessionid.' is already final');
|
|
$this->dismiss_ufo($handle, true, 'Your SID was rejected.');
|
|
return false;
|
|
}
|
|
|
|
// Join this with what we may have already
|
|
$this->conn_half[$sessionid][$type] = $handle;
|
|
|
|
// Do the bookkeeping
|
|
$this->promote_final($sessionid, $customdata);
|
|
|
|
// It's not an UFO anymore
|
|
$this->dismiss_ufo($handle, false);
|
|
|
|
// Dispatch waiting sidekicks
|
|
$this->process_sidekicks($sessionid);
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function dismiss_half($sessionid, $disconnect = true) {
|
|
if(!isset($this->conn_half[$sessionid])) {
|
|
return false;
|
|
}
|
|
if($disconnect) {
|
|
foreach($this->conn_half[$sessionid] as $handle) {
|
|
@socket_shutdown($handle);
|
|
@socket_close($handle);
|
|
}
|
|
}
|
|
unset($this->conn_half[$sessionid]);
|
|
return true;
|
|
}
|
|
|
|
function dismiss_set($sessionid) {
|
|
if(!empty($this->conn_sets[$sessionid])) {
|
|
foreach($this->conn_sets[$sessionid] as $handle) {
|
|
// Since we want to dismiss this, don't generate any errors if it's dead already
|
|
@socket_shutdown($handle);
|
|
@socket_close($handle);
|
|
}
|
|
}
|
|
$chatroom = $this->sets_info[$sessionid]['chatid'];
|
|
$userid = $this->sets_info[$sessionid]['userid'];
|
|
unset($this->conn_sets[$sessionid]);
|
|
unset($this->sets_info[$sessionid]);
|
|
unset($this->chatrooms[$chatroom]['users'][$sessionid]);
|
|
$this->trace('Removed all traces of user with session '.$sessionid, E_USER_NOTICE);
|
|
return true;
|
|
}
|
|
|
|
|
|
function dismiss_ufo($handle, $disconnect = true, $message = NULL) {
|
|
if(empty($this->conn_ufo)) {
|
|
return false;
|
|
}
|
|
foreach($this->conn_ufo as $id => $ufo) {
|
|
if($ufo->handle == $handle) {
|
|
unset($this->conn_ufo[$id]);
|
|
if($disconnect) {
|
|
if(!empty($message)) {
|
|
$this->write_data($handle, $message."\n\n");
|
|
}
|
|
socket_shutdown($handle);
|
|
socket_close($handle);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
function conn_accept() {
|
|
$read_socket = array($this->listen_socket);
|
|
$changed = socket_select($read_socket, $write = NULL, $except = NULL, 0, 0);
|
|
|
|
if(!$changed) {
|
|
return false;
|
|
}
|
|
$handle = socket_accept($this->listen_socket);
|
|
if(!$handle) {
|
|
return false;
|
|
}
|
|
|
|
$newconn = &New ChatConnection($handle);
|
|
$id = $this->new_ufo_id();
|
|
$this->conn_ufo[$id] = $newconn;
|
|
|
|
//$this->trace('UFO #'.$id.': connection from '.$newconn->ip.' on port '.$newconn->port.', '.$newconn->handle);
|
|
}
|
|
|
|
function conn_activity_ufo (&$handles) {
|
|
$monitor = array();
|
|
if(!empty($this->conn_ufo)) {
|
|
foreach($this->conn_ufo as $ufoid => $ufo) {
|
|
$monitor[$ufoid] = $ufo->handle;
|
|
}
|
|
}
|
|
|
|
if(empty($monitor)) {
|
|
$handles = array();
|
|
return 0;
|
|
}
|
|
|
|
$retval = socket_select($monitor, $a = NULL, $b = NULL, NULL);
|
|
$handles = $monitor;
|
|
|
|
return $retval;
|
|
}
|
|
|
|
function message_broadcast($message, $sender) {
|
|
if(empty($this->conn_sets)) {
|
|
return true;
|
|
}
|
|
|
|
$now = time();
|
|
|
|
// First of all, mark this chatroom as having had activity now
|
|
$this->chatrooms[$message->chatid]['lastactivity'] = $now;
|
|
|
|
foreach($this->sets_info as $sessionid => $info) {
|
|
// We need to get handles from users that are in the same chatroom, same group
|
|
if($info['chatid'] == $message->chatid &&
|
|
($info['groupid'] == $message->groupid || $message->groupid == 0))
|
|
{
|
|
|
|
// Simply give them the message
|
|
course_setup($info['course'], $info['user']);
|
|
$output = chat_format_message_manually($message, $info['courseid'], $sender, $info['user']);
|
|
$this->trace('Delivering message "'.$output->text.'" to '.$this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL]);
|
|
|
|
if($output->beep) {
|
|
$this->write_data($this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL], '<embed src="'.$this->_beepsoundsrc.'" autostart="true" hidden="true" />');
|
|
}
|
|
|
|
if($info['quirks'] & QUIRK_CHUNK_UPDATE) {
|
|
$output->html .= $GLOBALS['CHAT_DUMMY_DATA'];
|
|
$output->html .= $GLOBALS['CHAT_DUMMY_DATA'];
|
|
$output->html .= $GLOBALS['CHAT_DUMMY_DATA'];
|
|
}
|
|
|
|
if(!$this->write_data($this->conn_sets[$sessionid][CHAT_CONNECTION_CHANNEL], $output->html)) {
|
|
$this->disconnect_session($sessionid);
|
|
}
|
|
//$this->trace('Sent to UID '.$this->sets_info[$sessionid]['userid'].': '.$message->text_);
|
|
}
|
|
}
|
|
}
|
|
|
|
function disconnect_session($sessionid) {
|
|
global $DB;
|
|
|
|
$info = $this->sets_info[$sessionid];
|
|
|
|
$DB->delete_records('chat_users', array('sid'=>$sessionid));
|
|
$msg = &New stdClass;
|
|
$msg->chatid = $info['chatid'];
|
|
$msg->userid = $info['userid'];
|
|
$msg->groupid = $info['groupid'];
|
|
$msg->system = 1;
|
|
$msg->message = 'exit';
|
|
$msg->timestamp = time();
|
|
|
|
$this->trace('User has disconnected, destroying uid '.$info['userid'].' with SID '.$sessionid, E_USER_WARNING);
|
|
$DB->insert_record('chat_messages', $msg, false);
|
|
$DB->insert_record('chat_messages_current', $msg, false);
|
|
|
|
// *************************** IMPORTANT
|
|
//
|
|
// Kill him BEFORE broadcasting, otherwise we 'll get infinite recursion!
|
|
//
|
|
// **********************************************************************
|
|
$latesender = $info['user'];
|
|
$this->dismiss_set($sessionid);
|
|
$this->message_broadcast($msg, $latesender);
|
|
}
|
|
|
|
function fatal($message) {
|
|
$message .= "\n";
|
|
if($this->_logfile) {
|
|
$this->trace($message, E_USER_ERROR);
|
|
}
|
|
echo "FATAL ERROR:: $message\n";
|
|
die();
|
|
}
|
|
|
|
function init_sockets() {
|
|
global $CFG;
|
|
|
|
$this->trace('Setting up sockets');
|
|
|
|
if(false === ($this->listen_socket = socket_create(AF_INET, SOCK_STREAM, 0))) {
|
|
// Failed to create socket
|
|
$lasterr = socket_last_error();
|
|
$this->fatal('socket_create() failed: '. socket_strerror($lasterr).' ['.$lasterr.']');
|
|
}
|
|
|
|
//socket_close($DAEMON->listen_socket);
|
|
//die();
|
|
|
|
if(!socket_bind($this->listen_socket, $CFG->chat_serverip, $CFG->chat_serverport)) {
|
|
// Failed to bind socket
|
|
$lasterr = socket_last_error();
|
|
$this->fatal('socket_bind() failed: '. socket_strerror($lasterr).' ['.$lasterr.']');
|
|
}
|
|
|
|
if(!socket_listen($this->listen_socket, $CFG->chat_servermax)) {
|
|
// Failed to get socket to listen
|
|
$lasterr = socket_last_error();
|
|
$this->fatal('socket_listen() failed: '. socket_strerror($lasterr).' ['.$lasterr.']');
|
|
}
|
|
|
|
// Socket has been initialized and is ready
|
|
$this->trace('Socket opened on port '.$CFG->chat_serverport);
|
|
|
|
// [pj]: I really must have a good read on sockets. What exactly does this do?
|
|
// http://www.unixguide.net/network/socketfaq/4.5.shtml is still not enlightening enough for me.
|
|
socket_setopt($this->listen_socket, SOL_SOCKET, SO_REUSEADDR, 1);
|
|
socket_set_nonblock($this->listen_socket);
|
|
}
|
|
|
|
function cli_switch($switch, $param = NULL) {
|
|
switch($switch) { //LOL
|
|
case 'reset':
|
|
// Reset sockets
|
|
$this->_resetsocket = true;
|
|
return false;
|
|
case 'start':
|
|
// Start the daemon
|
|
$this->_readytogo = true;
|
|
return false;
|
|
break;
|
|
case 'v':
|
|
// Verbose mode
|
|
$this->_trace_level = E_ALL;
|
|
return false;
|
|
break;
|
|
case 'l':
|
|
// Use logfile
|
|
if(!empty($param)) {
|
|
$this->_logfile_name = $param;
|
|
}
|
|
$this->_logfile = @fopen($this->_logfile_name, 'a+');
|
|
if($this->_logfile == false) {
|
|
$this->fatal('Failed to open '.$this->_logfile_name.' for writing');
|
|
}
|
|
return false;
|
|
default:
|
|
// Unrecognized
|
|
$this->fatal('Unrecognized command line switch: '.$switch);
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
$DAEMON = New ChatDaemon;
|
|
set_error_handler(array($DAEMON, 'error_handler'));
|
|
|
|
/// Check the parameters //////////////////////////////////////////////////////
|
|
|
|
unset($argv[0]);
|
|
$commandline = implode(' ', $argv);
|
|
if(strpos($commandline, '-') === false) {
|
|
if(!empty($commandline)) {
|
|
// We cannot have received any meaningful parameters
|
|
$DAEMON->fatal('Garbage in command line');
|
|
}
|
|
}
|
|
else {
|
|
// Parse command line
|
|
$switches = preg_split('/(-{1,2}[a-zA-Z]+) */', $commandline, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
|
|
|
|
// Taking advantage of the fact that $switches is indexed with incrementing numeric keys
|
|
// We will be using that to pass additional information to those switches who need it
|
|
$numswitches = count($switches);
|
|
|
|
// Fancy way to give a "hyphen" boolean flag to each "switch"
|
|
$switches = array_map(create_function('$x', 'return array("str" => $x, "hyphen" => (substr($x, 0, 1) == "-"));'), $switches);
|
|
|
|
for($i = 0; $i < $numswitches; ++$i) {
|
|
|
|
$switch = $switches[$i]['str'];
|
|
$params = ($i == $numswitches - 1 ? NULL :
|
|
($switches[$i + 1]['hyphen'] ? NULL : trim($switches[$i + 1]['str']))
|
|
);
|
|
|
|
if(substr($switch, 0, 2) == '--') {
|
|
// Double-hyphen switch
|
|
$DAEMON->cli_switch(strtolower(substr($switch, 2)), $params);
|
|
}
|
|
else if(substr($switch, 0, 1) == '-') {
|
|
// Single-hyphen switch(es), may be more than one run together
|
|
$switch = substr($switch, 1); // Get rid of the -
|
|
$len = strlen($switch);
|
|
for($j = 0; $j < $len; ++$j) {
|
|
$DAEMON->cli_switch(strtolower(substr($switch, $j, 1)), $params);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if(!$DAEMON->query_start()) {
|
|
// For some reason we didn't start, so print out some info
|
|
echo 'Starts the Moodle chat socket server on port '.$CFG->chat_serverport;
|
|
echo "\n\n";
|
|
echo "Usage: chatd.php [parameters]\n\n";
|
|
echo "Parameters:\n";
|
|
echo " --start Starts the daemon\n";
|
|
echo " -v Verbose mode (prints trivial information messages)\n";
|
|
echo " -l [logfile] Log all messages to logfile (if not specified, chatd.log)\n";
|
|
echo "Example:\n";
|
|
echo " chatd.php --start -l\n\n";
|
|
die();
|
|
}
|
|
|
|
if (!function_exists('socket_setopt')) {
|
|
echo "Error: Function socket_setopt() does not exist.\n";
|
|
echo "Possibly PHP has not been compiled with --enable-sockets.\n\n";
|
|
die();
|
|
}
|
|
|
|
$DAEMON->init_sockets();
|
|
|
|
/*
|
|
declare(ticks=1);
|
|
|
|
$pid = pcntl_fork();
|
|
if ($pid == -1) {
|
|
die("could not fork");
|
|
} else if ($pid) {
|
|
exit(); // we are the parent
|
|
} else {
|
|
// we are the child
|
|
}
|
|
|
|
// detatch from the controlling terminal
|
|
if (!posix_setsid()) {
|
|
die("could not detach from terminal");
|
|
}
|
|
|
|
// setup signal handlers
|
|
pcntl_signal(SIGTERM, "sig_handler");
|
|
pcntl_signal(SIGHUP, "sig_handler");
|
|
|
|
if($DAEMON->_pcntl_exists && false) {
|
|
$DAEMON->trace('Unholy spirit possession: daemonizing');
|
|
$DAEMON->pid = pcntl_fork();
|
|
if($pid == -1) {
|
|
$DAEMON->trace('Process fork failed, terminating');
|
|
die();
|
|
}
|
|
else if($pid) {
|
|
// We are the parent
|
|
$DAEMON->trace('Successfully forked the daemon with PID '.$pid);
|
|
die();
|
|
}
|
|
else {
|
|
// We are the daemon! :P
|
|
}
|
|
|
|
// FROM NOW ON, IT'S THE DAEMON THAT'S RUNNING!
|
|
|
|
// Detach from controlling terminal
|
|
if(!posix_setsid()) {
|
|
$DAEMON->trace('Could not detach daemon process from terminal!');
|
|
}
|
|
}
|
|
else {
|
|
// Cannot go demonic
|
|
$DAEMON->trace('Unholy spirit possession failed: PHP is not compiled with --enable-pcntl');
|
|
}
|
|
*/
|
|
|
|
$DAEMON->trace('Started Moodle chatd on port '.$CFG->chat_serverport.', listening socket '.$DAEMON->listen_socket, E_USER_WARNING);
|
|
|
|
/// Clear the decks of old stuff
|
|
$DB->delete_records('chat_users', array('version'=>'sockets'));
|
|
|
|
while(true) {
|
|
$active = array();
|
|
|
|
// First of all, let's see if any of our UFOs has identified itself
|
|
if($DAEMON->conn_activity_ufo($active)) {
|
|
foreach($active as $handle) {
|
|
$read_socket = array($handle);
|
|
$changed = socket_select($read_socket, $write = NULL, $except = NULL, 0, 0);
|
|
|
|
if($changed > 0) {
|
|
// Let's see what it has to say
|
|
|
|
$data = socket_read($handle, 2048); // should be more than 512 to prevent empty pages and repeated messages!!
|
|
if(empty($data)) {
|
|
continue;
|
|
}
|
|
|
|
if (strlen($data) == 2048) { // socket_read has more data, ignore all data
|
|
$DAEMON->trace('UFO with '.$handle.': Data too long; connection closed', E_USER_WARNING);
|
|
$DAEMON->dismiss_ufo($handle, true, 'Data too long; connection closed');
|
|
continue;
|
|
}
|
|
|
|
if(!ereg('win=(chat|users|message|beep).*&chat_sid=([a-zA-Z0-9]*) HTTP', $data, $info)) {
|
|
// Malformed data
|
|
$DAEMON->trace('UFO with '.$handle.': Request with malformed data; connection closed', E_USER_WARNING);
|
|
$DAEMON->dismiss_ufo($handle, true, 'Request with malformed data; connection closed');
|
|
continue;
|
|
}
|
|
|
|
$type = $info[1];
|
|
$sessionid = $info[2];
|
|
|
|
$customdata = array();
|
|
|
|
switch($type) {
|
|
case 'chat':
|
|
$type = CHAT_CONNECTION_CHANNEL;
|
|
$customdata['quirks'] = 0;
|
|
if(strpos($data, 'Safari')) {
|
|
$DAEMON->trace('Safari identified...', E_USER_WARNING);
|
|
$customdata['quirks'] += QUIRK_CHUNK_UPDATE;
|
|
}
|
|
break;
|
|
case 'users':
|
|
$type = CHAT_SIDEKICK_USERS;
|
|
break;
|
|
case 'beep':
|
|
$type = CHAT_SIDEKICK_BEEP;
|
|
if(!ereg('beep=([^&]*)[& ]', $data, $info)) {
|
|
$DAEMON->trace('Beep sidekick did not contain a valid userid', E_USER_WARNING);
|
|
$DAEMON->dismiss_ufo($handle, true, 'Request with malformed data; connection closed');
|
|
continue;
|
|
}
|
|
else {
|
|
$customdata = array('beep' => intval($info[1]));
|
|
}
|
|
break;
|
|
case 'message':
|
|
$type = CHAT_SIDEKICK_MESSAGE;
|
|
if(!ereg('chat_message=([^&]*)[& ]chat_msgidnr=([^&]*)[& ]', $data, $info)) {
|
|
$DAEMON->trace('Message sidekick did not contain a valid message', E_USER_WARNING);
|
|
$DAEMON->dismiss_ufo($handle, true, 'Request with malformed data; connection closed');
|
|
continue;
|
|
}
|
|
else {
|
|
$customdata = array('message' => $info[1], 'index' => $info[2]);
|
|
}
|
|
break;
|
|
default:
|
|
$DAEMON->trace('UFO with '.$handle.': Request with unknown type; connection closed', E_USER_WARNING);
|
|
$DAEMON->dismiss_ufo($handle, true, 'Request with unknown type; connection closed');
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
// OK, now we know it's something good... promote it and pass it all the data it needs
|
|
$DAEMON->promote_ufo($handle, $type, $sessionid, $customdata);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
$now = time();
|
|
|
|
// Clean up chatrooms with no activity as required
|
|
if($now - $DAEMON->_last_idle_poll >= $DAEMON->_freq_poll_idle_chat) {
|
|
$DAEMON->poll_idle_chats($now);
|
|
}
|
|
|
|
// Finally, accept new connections
|
|
$DAEMON->conn_accept();
|
|
|
|
usleep($DAEMON->_time_rest_socket);
|
|
}
|
|
|
|
@socket_shutdown($DAEMON->listen_socket, 0);
|
|
die("\n\n-- terminated --\n");
|
|
|
|
?>
|