<?php
class socketServer
{
const LISTEN_SOCKET_NUM = 9;
const LOG_PATH = "./log/";
private $_ip = "127.0.0.1";
private $_port = 1238;
private $_socketPool = array();
private $_master = null;
public function __construct()
{
$this->initSocket();
}
private function initSocket()
{
try {
$this->_master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($this->_master, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($this->_master, $this->_ip, $this->_port);
socket_listen($this->_master, self::LISTEN_SOCKET_NUM);
} catch (Exception $e) {
$this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
}
$this->_socketPool[0] = array('resource' => $this->_master);
$pid = getmypid();
$this->debug(array("server: {$this->_master} started,pid: {$pid}"));
while (true) {
try {
$this->run();
} catch (Exception $e) {
$this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
}
}
}
private function run()
{
$write = $except = NULL;
$sockets = array_column($this->_socketPool, 'resource');
$read_num = socket_select($sockets, $write, $except, NULL);
if (false === $read_num) {
$this->debug(array('socket_select_error', $err_code = socket_last_error(), socket_strerror($err_code)));
return;
}
foreach ($sockets as $socket) {
if ($socket == $this->_master) {
$client = socket_accept($this->_master);
if ($client === false) {
$this->debug(['socket_accept_error', $err_code = socket_last_error(), socket_strerror($err_code)]);
continue;
}
$this->connection($client);
} else {
$bytes = @socket_recv($socket, $buffer, 2048, 0);
if ($bytes == 0) {
$recv_msg = $this->disconnection($socket);
} else {
if ($this->_socketPool[(int)$socket]['handShake'] == false) {
$this->handShake($socket, $buffer);
continue;
} else {
$recv_msg = $this->parse($buffer);
}
}
$msg = $this->doEvents($socket, $recv_msg);
echo($msg);
socket_getpeername ( $socket , $address ,$port );
$this->debug(array(
'send_success',
json_encode($recv_msg),
$address,
$port
));
$this->broadcast($msg);
}
}
}
private function broadcast($data)
{
foreach ($this->_socketPool as $socket) {
if ($socket['resource'] == $this->_master) {
continue;
}
socket_write($socket['resource'], $data, strlen($data));
}
}
private function doEvents($socket, $recv_msg)
{
$msg_type = $recv_msg['type'];
$msg_content = $recv_msg['msg'];
$response = [];
switch ($msg_type) {
case 'login':
$this->_socketPool[(int)$socket]['userInfo'] = array("username" => $msg_content, 'headerimg' => $recv_msg['headerimg'], "login_time" => date("h:i"));
$user_list = array_column($this->_socketPool, 'userInfo');
$response['type'] = 'login';
$response['msg'] = $msg_content;
$response['user_list'] = $user_list;
break;
case 'logout':
$user_list = array_column($this->_socketPool, 'userInfo');
$response['type'] = 'logout';
$response['user_list'] = $user_list;
if ($nowUserSocket = @$this->_socketPool[(int)$socket]) {
$response['msg'] = $nowUserSocket['userInfo']['username'];
}else{
$response['msg'] = '';
}
break;
case 'user':
$userInfo = $this->_socketPool[(int)$socket]['userInfo'];
$response['type'] = 'user';
$response['from'] = $userInfo['username'];
$response['msg'] = $msg_content;
$response['headerimg'] = $userInfo['headerimg'];
break;
}
return $this->frame(json_encode($response));
}
public function handShake($socket, $buffer)
{
$acceptKey = $this->encry($buffer);
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"Sec-WebSocket-Accept: " . $acceptKey . "\r\n\r\n";
socket_write($socket, $upgrade, strlen($upgrade));
$this->_socketPool[(int)$socket]['handShake'] = true;
socket_getpeername ( $socket , $address ,$port );
$this->debug(array(
'hand_shake_success',
$socket,
$address,
$port
));
$msg = array('type' => 'handShake', 'msg' => '握手成功');
$msg = $this->frame(json_encode($msg));
socket_write($socket, $msg, strlen($msg));
return true;
}
private function frame($msg)
{
$frame = [];
$frame[0] = '81';
$len = strlen($msg);
if ($len < 126) {
$frame[1] = $len < 16 ? '0' . dechex($len) : dechex($len);
} else if ($len < 65025) {
$s = dechex($len);
$frame[1] = '7e' . str_repeat('0', 4 - strlen($s)) . $s;
} else {
$s = dechex($len);
$frame[1] = '7f' . str_repeat('0', 16 - strlen($s)) . $s;
}
$data = '';
$l = strlen($msg);
for ($i = 0; $i < $l; $i++) {
$data .= dechex(ord($msg{$i}));
}
$frame[2] = $data;
$data = implode('', $frame);
return pack("H*", $data);
}
private function parse($buffer)
{
$decoded = '';
$len = ord($buffer[1]) & 127;
if ($len === 126) {
$masks = substr($buffer, 4, 4);
$data = substr($buffer, 8);
} else if ($len === 127) {
$masks = substr($buffer, 10, 4);
$data = substr($buffer, 14);
} else {
$masks = substr($buffer, 2, 4);
$data = substr($buffer, 6);
}
for ($index = 0; $index < strlen($data); $index++) {
$decoded .= $data[$index] ^ $masks[$index % 4];
}
return json_decode($decoded, true);
}
private function getKey($req)
{
$key = null;
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
$key = $match[1];
}
return $key;
}
private function encry($req)
{
$key = $this->getKey($req);
return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
}
public function connection($client)
{
socket_getpeername ( $client , $address ,$port );
$info = array(
'resource' => $client,
'userInfo' => '',
'handShake' => false,
'ip' => $address,
'port' => $port,
);
$this->_socketPool[(int)$client] = $info;
$this->debug(array_merge(['socket_connect'], $info));
}
public function disconnection($socket)
{
$recv_msg = array(
'type' => 'logout',
'msg' => @$this->_socketPool[(int)$socket]['username'],
);
unset($this->_socketPool[(int)$socket]);
return $recv_msg;
}
private function debug(array $info)
{
$time = date('Y-m-d H:i:s');
array_unshift($info, $time);
$info = array_map('json_encode', $info);
file_put_contents(self::LOG_PATH . 'websocket_debug.log', implode(' | ', $info) . "\r\n", FILE_APPEND);
}
}
new socketServer();
