Witam,
mam problem z serwerem websocket, wszystko działa, ale po kilku/kilkunastu godzinach się zawiesza (teoretycznie powinien się restartować po błędzie, ale nic takiego się nie dzieje...)
Serwer co sekundę sprawdza bazę mysql i wysyła dane do wszystkich podłączonych użytkowników.
Odpalam go przy starcie systemu jako usługę - debian6 (/etc/init/server.conf)
tak wygląda plik /etc/init/server.conf:
start on startup
stop on shutdown
# Automatically respawn
respawn
respawn limit 20 5
# Run the script!
# Note, in this example, if your PHP script returns
# the string "ERROR", the daemon will stop itself.
script
[ $(exec /usr/bin/php -f /home/xxx/socket/server.php) = 'ERROR' ] && ( stop; exit 1; )
end script
Plik serwera /home/xxx/socket/server.php:
<?php
error_reporting(E_ALL);
$host = 'localhost'; //host
$port = '9000'; //port
$null = NULL; //null var
$db = new PDO('mysql:host=localhost;dbname=xxx;charset=utf8', 'root', '');
//Create TCP/IP sream socket
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
//reuseable port
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
//bind socket to specified host
socket_bind($socket, 0, $port);
//listen to port
socket_listen($socket);
//create & add listning socket to the list
$clients = array($socket);
//start endless loop, so that our script doesn't stop
while (true) {
//manage multipal connections
$changed = $clients;
$new = false;
//returns the socket resources in $changed array
socket_select($changed, $null, $null, 0, 10);
//check for new socket
if (in_array($socket, $changed)) {
$socket_new = socket_accept($socket); //accpet new socket
$clients[] = $socket_new; //add socket to client array
$header = socket_read($socket_new, 1024); //read data sent by the socket
perform_handshaking($header, $socket_new, $host, $port); //perform websocket handshake
socket_getpeername($socket_new, $ip); //get ip address of connected socket
$new = true;
//make room for new socket
$found_socket = array_search($socket, $changed);
unset($changed[$found_socket]);
}
foreach ($changed as $changed_socket) {
//check for any incomming data
while(socket_recv($changed_socket, $buf, 1024, 0) >= 1)
{
$found_socket2 = array_search($changed_socket, $clients);
unset($clients[$found_socket2]);
break 2; //exist this loop
}
$buf = @socket_read($changed_socket, 1024, PHP_NORMAL_READ);
if ($buf === false) { // check disconnected client
// remove client for $clients array
$found_socket = array_search($changed_socket, $clients);
unset($clients[$found_socket]);
}
}
//
// wyciąganie danych z bazy
//
$response2 = mask(json_encode(array('xxx'=>'dane_z_bazy')));
send_message($response2);
}
sleep(1);
}
// close the listening socket
socket_close($sock);
function send_message($msg,$client = NULL)
{
global $clients;
if(!isset($client))
{
foreach($clients as $changed_socket)
{
@socket_write($changed_socket,$msg,strlen($msg));
}
}
else{
@socket_write($client,$msg,strlen($msg));
}
return true;
}
//Unmask incoming framed message
function unmask($text) {
$length = ord($text[1]) & 127;
if($length == 126) {
$masks = substr($text, 4, 4);
$data = substr($text, 8);
}
elseif($length == 127) {
$masks = substr($text, 10, 4);
$data = substr($text, 14);
}
else {
$masks = substr($text, 2, 4);
$data = substr($text, 6);
}
$text = "";
for ($i = 0; $i < strlen($data); ++$i) {
$text .= $data[$i] ^ $masks[$i%4];
}
return $text;
}
//Encode message for transfer to client.
function mask($text)
{
$b1 = 0x80 | (0x1 & 0x0f);
$length = strlen($text);
if($length <= 125)
$header = pack('CC', $b1, $length);
elseif($length > 125 && $length < 65536)
$header = pack('CCn', $b1, 126, $length);
elseif($length >= 65536)
$header = pack('CCNN', $b1, 127, $length);
return $header.$text;
}
//handshake new client.
function perform_handshaking($receved_header,$client_conn, $host, $port)
{
$headers = array();
$lines = preg_split("/\r\n/", $receved_header);
foreach($lines as $line)
{
$line = chop($line);
if(preg_match('/\A(\S+): (.*)\z/', $line, $matches))
{
$headers[$matches[1]] = $matches[2];
}
}
$secKey = $headers['Sec-WebSocket-Key'];
$secAccept = base64_encode(pack('H*', sha1($secKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
//hand shaking header
$upgrade = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"WebSocket-Origin: $host\r\n" .
"WebSocket-Location: ws://$host:$port/socket/server.php\r\n".
"Sec-WebSocket-Accept:$secAccept\r\n\r\n";
socket_write($client_conn,$upgrade,strlen($upgrade));
}
Czemu taki serwer się zawiesza i co można zrobić żeby się automatycznie restartował po zawiasie?