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Gateway.php
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Gateway.php
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<?php
namespace GatewayClient;
use \Exception;
/**
* This file is part of workerman.
*
* Licensed under The MIT License
* For full copyright and license information, please see the MIT-LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @author walkor<walkor@workerman.net>
* @copyright walkor<walkor@workerman.net>
* @link http://www.workerman.net/
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
/**
* 数据发送相关
* @version 3.0.0
*/
class Gateway
{
/**
* gateway 实例
*
* @var object
*/
protected static $businessWorker = null;
/**
* 注册中心地址
*
* @var string
*/
public static $registerAddress = '127.0.0.1:1236';
/**
* 注册中心地址缓存
*
* @var array
*/
public static $registerAddressCache = [];
/**
* 秘钥
* @var string
*/
public static $secretKey = '';
/**
* 链接超时时间
* @var int
*/
public static $connectTimeout = 3;
/**
* 与Gateway是否是长链接
* @var bool
*/
public static $persistentConnection = false;
/**
* 向所有客户端连接(或者 client_id_array 指定的客户端连接)广播消息
*
* @param string $message 向客户端发送的消息
* @param array $client_id_array 客户端 id 数组
* @param array $exclude_client_id 不给这些client_id发
* @param bool $raw 是否发送原始数据（即不调用gateway的协议的encode方法）
* @return void
*/
public static function sendToAll($message, $client_id_array = null, $exclude_client_id = null, $raw = false)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_SEND_TO_ALL;
$gateway_data['body'] = $message;
if ($raw) {
$gateway_data['flag'] |= GatewayProtocol::FLAG_NOT_CALL_ENCODE;
}
if ($exclude_client_id) {
if (!is_array($exclude_client_id)) {
$exclude_client_id = array($exclude_client_id);
}
if ($client_id_array) {
$exclude_client_id = array_flip($exclude_client_id);
}
}
if ($client_id_array) {
if (!is_array($client_id_array)) {
echo new \Exception('bad $client_id_array:'.var_export($client_id_array, true));
return;
}
$data_array = array();
foreach ($client_id_array as $client_id) {
if (isset($exclude_client_id[$client_id])) {
continue;
}
$address = Context::clientIdToAddress($client_id);
$key = long2ip($address['local_ip']) . ":{$address['local_port']}";
$data_array[$key][$address['connection_id']] = $address['connection_id'];
}
foreach ($data_array as $addr => $connection_id_list) {
$the_gateway_data = $gateway_data;
$the_gateway_data['ext_data'] = json_encode(array('connections' => $connection_id_list));
self::sendToGateway($addr, $the_gateway_data);
}
return;
} elseif (empty($client_id_array) && is_array($client_id_array)) {
return;
}
if (!$exclude_client_id) {
return self::sendToAllGateway($gateway_data);
}
$address_connection_array = self::clientIdArrayToAddressArray($exclude_client_id);
// 如果有businessWorker实例，说明运行在workerman环境中，通过businessWorker中的长连接发送数据
if (self::$businessWorker) {
foreach (self::$businessWorker->gatewayConnections as $address => $gateway_connection) {
$gateway_data['ext_data'] = isset($address_connection_array[$address]) ?
json_encode(array('exclude'=> $address_connection_array[$address])) : '';
/** @var TcpConnection $gateway_connection */
$gateway_connection->send($gateway_data);
}
} // 运行在其它环境中，通过注册中心得到gateway地址
else {
$all_addresses = self::getAllGatewayAddressesFromRegister();
if (!$all_addresses) {
throw new Exception('Gateway::getAllGatewayAddressesFromRegister() with registerAddress:' .
self::$registerAddress . ' return ' . var_export($all_addresses, true));
}
foreach ($all_addresses as $address) {
$gateway_data['ext_data'] = isset($address_connection_array[$address]) ?
json_encode(array('exclude'=> $address_connection_array[$address])) : '';
self::sendToGateway($address, $gateway_data);
}
}
}
/**
* 向某个客户端连接发消息
*
* @param int $client_id
* @param string $message
* @return bool
*/
public static function sendToClient($client_id, $message)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_SEND_TO_ONE, $message);
}
/**
* 向当前客户端连接发送消息
*
* @param string $message
* @return bool
*/
public static function sendToCurrentClient($message)
{
return self::sendCmdAndMessageToClient(null, GatewayProtocol::CMD_SEND_TO_ONE, $message);
}
/**
* 判断某个uid是否在线
*
* @param string $uid
* @return int 0|1
*/
public static function isUidOnline($uid)
{
return (int)self::getClientIdByUid($uid);
}
/**
* 判断某个客户端连接是否在线
*
* @param int $client_id
* @return int 0|1
*/
public static function isOnline($client_id)
{
$address_data = Context::clientIdToAddress($client_id);
$address = long2ip($address_data['local_ip']) . ":{$address_data['local_port']}";
if (isset(self::$businessWorker)) {
if (!isset(self::$businessWorker->gatewayConnections[$address])) {
return 0;
}
}
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_IS_ONLINE;
$gateway_data['connection_id'] = $address_data['connection_id'];
return (int)self::sendAndRecv($address, $gateway_data);
}
/**
* 获取所有在线用户的session，client_id为 key
*
* @param string $group
* @return array
*/
public static function getAllClientInfo($group = null)
{
return self::getAllClientSessions($group);
}
/**
* 获取所有在线用户的session，client_id为 key
*
* @param string $group
* @return array
*/
public static function getAllClientSessions($group = null)
{
$gateway_data = GatewayProtocol::$empty;
if (!$group) {
$gateway_data['cmd'] = GatewayProtocol::CMD_GET_ALL_CLIENT_INFO;
} else {
$gateway_data['cmd'] = GatewayProtocol::CMD_GET_CLINET_INFO_BY_GROUP;
$gateway_data['ext_data'] = $group;
}
$status_data = array();
$all_buffer_array = self::getBufferFromAllGateway($gateway_data);
foreach ($all_buffer_array as $local_ip => $buffer_array) {
foreach ($buffer_array as $local_port => $data) {
if ($data) {
foreach ($data as $connection_id => $session_buffer) {
$client_id = Context::addressToClientId($local_ip, $local_port, $connection_id);
if ($client_id === Context::$client_id) {
$status_data[$client_id] = (array)$_SESSION;
} else {
$status_data[$client_id] = $session_buffer ? Context::sessionDecode($session_buffer) : array();
}
}
}
}
}
return $status_data;
}
/**
* 获取某个组的连接信息
*
* @param string $group
* @return array
*/
public static function getClientInfoByGroup($group)
{
return self::getAllClientSessions($group);
}
/**
* 获取某个组的连接信息
*
* @param string $group
* @return array
*/
public static function getClientSessionsByGroup($group)
{
return self::getAllClientSessions($group);
}
/**
* 获取所有连接数
*
* @return int
*/
public static function getAllClientCount()
{
return self::getClientCountByGroup();
}
/**
* 获取某个组的在线连接数
*
* @param string $group
* @return int
*/
public static function getClientCountByGroup($group = '')
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_GET_CLIENT_COUNT_BY_GROUP;
$gateway_data['ext_data'] = $group;
$total_count = 0;
$all_buffer_array = self::getBufferFromAllGateway($gateway_data);
foreach ($all_buffer_array as $local_ip => $buffer_array) {
foreach ($buffer_array as $local_port => $count) {
if ($count) {
$total_count += $count;
}
}
}
return $total_count;
}
/**
* 获取与 uid 绑定的 client_id 列表
*
* @param string $uid
* @return array
*/
public static function getClientIdByUid($uid)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_GET_CLIENT_ID_BY_UID;
$gateway_data['ext_data'] = $uid;
$client_list = array();
$all_buffer_array = self::getBufferFromAllGateway($gateway_data);
foreach ($all_buffer_array as $local_ip => $buffer_array) {
foreach ($buffer_array as $local_port => $connection_id_array) {
if ($connection_id_array) {
foreach ($connection_id_array as $connection_id) {
$client_list[] = Context::addressToClientId($local_ip, $local_port, $connection_id);
}
}
}
}
return $client_list;
}
/**
* 生成验证包，用于验证此客户端的合法性
*
* @return string
*/
protected static function generateAuthBuffer()
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_GATEWAY_CLIENT_CONNECT;
$gateway_data['body'] = json_encode(array(
'secret_key' => self::$secretKey,
));
return GatewayProtocol::encode($gateway_data);
}
/**
* 批量向所有 gateway 发包，并得到返回数组
*
* @param string $gateway_data
* @return array
* @throws Exception
*/
protected static function getBufferFromAllGateway($gateway_data)
{
$gateway_buffer = GatewayProtocol::encode($gateway_data);
$gateway_buffer = self::$secretKey ? self::generateAuthBuffer() . $gateway_buffer : $gateway_buffer;
if (isset(self::$businessWorker)) {
$all_addresses = self::$businessWorker->getAllGatewayAddresses();
if (empty($all_addresses)) {
throw new Exception('businessWorker::getAllGatewayAddresses return empty');
}
} else {
$all_addresses = self::getAllGatewayAddressesFromRegister();
if (empty($all_addresses)) {
return array();
}
}
$client_array = $status_data = $client_address_map = $receive_buffer_array = $recv_length_array = array();
// 批量向所有gateway进程发送请求数据
foreach ($all_addresses as $address) {
$client = stream_socket_client("tcp://$address", $errno, $errmsg, self::$connectTimeout);
if ($client && strlen($gateway_buffer) === stream_socket_sendto($client, $gateway_buffer)) {
$socket_id = (int)$client;
$client_array[$socket_id] = $client;
$client_address_map[$socket_id] = explode(':', $address);
$receive_buffer_array[$socket_id] = '';
}
}
// 超时1秒
$timeout = 1;
$time_start = microtime(true);
// 批量接收请求
while (count($client_array) > 0) {
$write = $except = array();
$read = $client_array;
if (@stream_select($read, $write, $except, $timeout)) {
foreach ($read as $client) {
$socket_id = (int)$client;
$buffer = stream_socket_recvfrom($client, 65535);
if ($buffer !== '' && $buffer !== false) {
$receive_buffer_array[$socket_id] .= $buffer;
$receive_length = strlen($receive_buffer_array[$socket_id]);
if (empty($recv_length_array[$socket_id]) && $receive_length >= 4) {
$recv_length_array[$socket_id] = current(unpack('N', $receive_buffer_array[$socket_id]));
}
if (!empty($recv_length_array[$socket_id]) && $receive_length >= $recv_length_array[$socket_id] + 4) {
unset($client_array[$socket_id]);
}
} elseif (feof($client)) {
unset($client_array[$socket_id]);
}
}
}
if (microtime(true) - $time_start > $timeout) {
break;
}
}
$format_buffer_array = array();
foreach ($receive_buffer_array as $socket_id => $buffer) {
$local_ip = ip2long($client_address_map[$socket_id][0]);
$local_port = $client_address_map[$socket_id][1];
$format_buffer_array[$local_ip][$local_port] = unserialize(substr($buffer, 4));
}
return $format_buffer_array;
}
/**
* 关闭某个客户端
*
* @param int $client_id
* @return bool
*/
public static function closeClient($client_id)
{
if ($client_id === Context::$client_id) {
return self::closeCurrentClient();
} // 不是发给当前用户则使用存储中的地址
else {
$address_data = Context::clientIdToAddress($client_id);
$address = long2ip($address_data['local_ip']) . ":{$address_data['local_port']}";
return self::kickAddress($address, $address_data['connection_id']);
}
}
/**
* 踢掉当前客户端
*
* @return bool
* @throws Exception
*/
public static function closeCurrentClient()
{
if (!Context::$connection_id) {
throw new Exception('closeCurrentClient can not be called in async context');
}
return self::kickAddress(long2ip(Context::$local_ip) . ':' . Context::$local_port, Context::$connection_id);
}
/**
* 将 client_id 与 uid 绑定
*
* @param int $client_id
* @param int|string $uid
* @return bool
*/
public static function bindUid($client_id, $uid)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_BIND_UID, '', $uid);
}
/**
* 将 client_id 与 uid 解除绑定
*
* @param int $client_id
* @param int|string $uid
* @return bool
*/
public static function unbindUid($client_id, $uid)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_UNBIND_UID, '', $uid);
}
/**
* 将 client_id 加入组
*
* @param int $client_id
* @param int|string $group
* @return bool
*/
public static function joinGroup($client_id, $group)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_JOIN_GROUP, '', $group);
}
/**
* 将 client_id 离开组
*
* @param int $client_id
* @param int|string $group
* @return bool
*/
public static function leaveGroup($client_id, $group)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_LEAVE_GROUP, '', $group);
}
/**
* 向所有 uid 发送
*
* @param int|string|array $uid
* @param string $message
*/
public static function sendToUid($uid, $message)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_SEND_TO_UID;
$gateway_data['body'] = $message;
if (!is_array($uid)) {
$uid = array($uid);
}
$gateway_data['ext_data'] = json_encode($uid);
self::sendToAllGateway($gateway_data);
}
/**
* 向 group 发送
*
* @param int|string|array $group 组（不允许是 0 '0' false null array()等为空的值）
* @param string $message 消息
* @param array $exclude_client_id 不给这些client_id发
* @param bool $raw 发送原始数据（即不调用gateway的协议的encode方法）
*/
public static function sendToGroup($group, $message, $exclude_client_id = null, $raw = false)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_SEND_TO_GROUP;
$gateway_data['body'] = $message;
if ($raw) {
$gateway_data['flag'] |= GatewayProtocol::FLAG_NOT_CALL_ENCODE;
}
if (!is_array($group)) {
$group = array($group);
}
// 分组发送，没有排除的client_id，直接发送
$default_ext_data_buffer = json_encode(array('group'=> $group, 'exclude'=> null));
if (empty($exclude_client_id)) {
$gateway_data['ext_data'] = $default_ext_data_buffer;
return self::sendToAllGateway($gateway_data);
}
// 分组发送，有排除的client_id，需要将client_id转换成对应gateway进程内的connectionId
if (!is_array($exclude_client_id)) {
$exclude_client_id = array($exclude_client_id);
}
$address_connection_array = self::clientIdArrayToAddressArray($exclude_client_id);
// 如果有businessWorker实例，说明运行在workerman环境中，通过businessWorker中的长连接发送数据
if (self::$businessWorker) {
foreach (self::$businessWorker->gatewayConnections as $address => $gateway_connection) {
$gateway_data['ext_data'] = isset($address_connection_array[$address]) ?
json_encode(array('group'=> $group, 'exclude'=> $address_connection_array[$address])) :
$default_ext_data_buffer;
/** @var TcpConnection $gateway_connection */
$gateway_connection->send($gateway_data);
}
} // 运行在其它环境中，通过注册中心得到gateway地址
else {
$all_addresses = self::getAllGatewayAddressesFromRegister();
if (!$all_addresses) {
throw new Exception('Gateway::getAllGatewayAddressesFromRegister() with registerAddress:' .
self::$registerAddress . ' return ' . var_export($all_addresses, true));
}
foreach ($all_addresses as $address) {
$gateway_data['ext_data'] = isset($address_connection_array[$address]) ?
json_encode(array('group'=> $group, 'exclude'=> $address_connection_array[$address])) :
$default_ext_data_buffer;
self::sendToGateway($address, $gateway_data);
}
}
}
/**
* 更新 session，框架自动调用，开发者不要调用
*
* @param int $client_id
* @param string $session_str
* @return bool
*/
public static function setSocketSession($client_id, $session_str)
{
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_SET_SESSION, '', $session_str);
}
/**
* 设置 session，原session值会被覆盖
*
* @param int $client_id
* @param array $session
*/
public static function setSession($client_id, array $session)
{
if (Context::$client_id === $client_id) {
$_SESSION = $session;
Context::$old_session = $_SESSION;
}
return self::setSocketSession($client_id, Context::sessionEncode($session));
}
/**
* 更新 session，实际上是与老的session合并
*
* @param int $client_id
* @param array $session
*/
public static function updateSession($client_id, array $session)
{
if (Context::$client_id === $client_id) {
$_SESSION = $session + (array)$_SESSION;
Context::$old_session = $_SESSION;
}
return self::sendCmdAndMessageToClient($client_id, GatewayProtocol::CMD_UPDATE_SESSION, '', Context::sessionEncode($session));
}
/**
* 获取某个client_id的session
*
* @param int $client_id
* @return mixed false表示出错、null表示用户不存在、array表示具体的session信息
*/
public static function getSession($client_id)
{
$address_data = Context::clientIdToAddress($client_id);
$address = long2ip($address_data['local_ip']) . ":{$address_data['local_port']}";
if (isset(self::$businessWorker)) {
if (!isset(self::$businessWorker->gatewayConnections[$address])) {
return null;
}
}
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_GET_SESSION_BY_CLIENT_ID;
$gateway_data['connection_id'] = $address_data['connection_id'];
return self::sendAndRecv($address, $gateway_data);
}
/**
* 想某个用户网关发送命令和消息
*
* @param int $client_id
* @param int $cmd
* @param string $message
* @param string $ext_data
* @return boolean
*/
protected static function sendCmdAndMessageToClient($client_id, $cmd, $message, $ext_data = '')
{
// 如果是发给当前用户则直接获取上下文中的地址
if ($client_id === Context::$client_id || $client_id === null) {
$address = long2ip(Context::$local_ip) . ':' . Context::$local_port;
$connection_id = Context::$connection_id;
} else {
$address_data = Context::clientIdToAddress($client_id);
$address = long2ip($address_data['local_ip']) . ":{$address_data['local_port']}";
$connection_id = $address_data['connection_id'];
}
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = $cmd;
$gateway_data['connection_id'] = $connection_id;
$gateway_data['body'] = $message;
if (!empty($ext_data)) {
$gateway_data['ext_data'] = $ext_data;
}
return self::sendToGateway($address, $gateway_data);
}
/**
* 发送数据并返回
*
* @param int $address
* @param mixed $data
* @return bool
* @throws Exception
*/
protected static function sendAndRecv($address, $data)
{
$buffer = GatewayProtocol::encode($data);
$buffer = self::$secretKey ? self::generateAuthBuffer() . $buffer : $buffer;
$client = stream_socket_client("tcp://$address", $errno, $errmsg, self::$connectTimeout);
if (!$client) {
throw new Exception("can not connect to tcp://$address $errmsg");
}
if (strlen($buffer) === stream_socket_sendto($client, $buffer)) {
$timeout = 1;
// 阻塞读
stream_set_blocking($client, 1);
// 1秒超时
stream_set_timeout($client, 1);
$all_buffer = '';
$time_start = microtime(true);
$pack_len = 0;
while (1) {
$buf = stream_socket_recvfrom($client, 655350);
if ($buf !== '' && $buf !== false) {
$all_buffer .= $buf;
} else {
if (feof($client)) {
throw new Exception("connection close tcp://$address");
} elseif (microtime(true) - $time_start > $timeout) {
break;
}
continue;
}
$recv_len = strlen($all_buffer);
if (!$pack_len && $recv_len >= 4) {
$pack_len= current(unpack('N', $all_buffer));
}
// 回复的数据都是以\n结尾
if (($pack_len && $recv_len >= $pack_len + 4) || microtime(true) - $time_start > $timeout) {
break;
}
}
// 返回结果
return unserialize(substr($all_buffer, 4));
} else {
throw new Exception("sendAndRecv($address, \$bufer) fail ! Can not send data!", 502);
}
}
/**
* 发送数据到网关
*
* @param string $address
* @param array $gateway_data
* @return bool
*/
protected static function sendToGateway($address, $gateway_data)
{
return self::sendBufferToGateway($address, GatewayProtocol::encode($gateway_data));
}
/**
* 发送buffer数据到网关
* @param string $address
* @param string $gateway_buffer
* @return bool
*/
protected static function sendBufferToGateway($address, $gateway_buffer)
{
// 有$businessWorker说明是workerman环境，使用$businessWorker发送数据
if (self::$businessWorker) {
if (!isset(self::$businessWorker->gatewayConnections[$address])) {
return false;
}
return self::$businessWorker->gatewayConnections[$address]->send($gateway_buffer, true);
}
// 非workerman环境
$gateway_buffer = self::$secretKey ? self::generateAuthBuffer() . $gateway_buffer : $gateway_buffer;
$flag = self::$persistentConnection ? STREAM_CLIENT_PERSISTENT | STREAM_CLIENT_CONNECT : STREAM_CLIENT_CONNECT;
$client = stream_socket_client("tcp://$address", $errno, $errmsg, self::$connectTimeout, $flag);
return strlen($gateway_buffer) == stream_socket_sendto($client, $gateway_buffer);
}
/**
* 向所有 gateway 发送数据
*
* @param string $gateway_data
* @throws Exception
*/
protected static function sendToAllGateway($gateway_data)
{
$buffer = GatewayProtocol::encode($gateway_data);
// 如果有businessWorker实例，说明运行在workerman环境中，通过businessWorker中的长连接发送数据
if (self::$businessWorker) {
foreach (self::$businessWorker->gatewayConnections as $gateway_connection) {
/** @var TcpConnection $gateway_connection */
$gateway_connection->send($buffer, true);
}
} // 运行在其它环境中，通过注册中心得到gateway地址
else {
$all_addresses = self::getAllGatewayAddressesFromRegister();
if (!$all_addresses) {
throw new Exception('Gateway::getAllGatewayAddressesFromRegister() with registerAddress:' .
self::$registerAddress . ' return ' . var_export($all_addresses, true));
}
foreach ($all_addresses as $address) {
self::sendBufferToGateway($address, $buffer);
}
}
}
/**
* 踢掉某个网关的 socket
*
* @param string $address
* @param int $connection_id
* @return bool
*/
protected static function kickAddress($address, $connection_id)
{
$gateway_data = GatewayProtocol::$empty;
$gateway_data['cmd'] = GatewayProtocol::CMD_KICK;
$gateway_data['connection_id'] = $connection_id;
return self::sendToGateway($address, $gateway_data);
}
/**
* 将clientid数组转换成address数组
*
* @param array $client_id_array
* @return array
*/
protected static function clientIdArrayToAddressArray(array $client_id_array)
{
$address_connection_array = array();
foreach ($client_id_array as $client_id) {
$address_data = Context::clientIdToAddress($client_id);
$address = long2ip($address_data['local_ip']) .
":{$address_data['local_port']}";
$address_connection_array[$address][$address_data['connection_id']] = $address_data['connection_id'];
}
return $address_connection_array;
}
/**
* 设置 gateway 实例
*
* @param \GatewayWorker\BusinessWorker $business_worker_instance
*/
public static function setBusinessWorker($business_worker_instance)
{
self::$businessWorker = $business_worker_instance;
}
/**
* 获取通过注册中心获取所有 gateway 通讯地址
*
* @return array
* @throws Exception
*/
protected static function getAllGatewayAddressesFromRegister()
{
static $last_update;
$time_now = time();
$expiration_time = 1;
if(empty(self::$registerAddressCache[self::$registerAddress]) || $time_now - $last_update > $expiration_time) {
$client = stream_socket_client('tcp://' . self::$registerAddress, $errno, $errmsg, self::$connectTimeout);
if (!$client) {
throw new Exception('Can not connect to tcp://' . self::$registerAddress . ' ' . $errmsg);
}
fwrite($client, '{"event":"worker_connect","secret_key":"' . self::$secretKey . '"}' . "\n");
stream_set_timeout($client, 1);
$ret = fgets($client, 655350);
if (!$ret || !$data = json_decode(trim($ret), true)) {
throw new Exception('getAllGatewayAddressesFromRegister fail. tcp://' .
self::$registerAddress . ' return ' . var_export($ret, true));
}
$last_update = $time_now;
self::$registerAddressCache[self::$registerAddress] = $data['addresses'];
}
return self::$registerAddressCache[self::$registerAddress];
}
}
/**
* 上下文 包含当前用户uid， 内部通信local_ip local_port socket_id ，以及客户端client_ip client_port
*/
class Context
{
/**
* 内部通讯id
* @var string
*/
public static $local_ip;
/**
* 内部通讯端口
* @var int
*/
public static $local_port;
/**
* 客户端ip
* @var string
*/
public static $client_ip;
/**
* 客户端端口
* @var int
*/
public static $client_port;
/**
* client_id
* @var string
*/
public static $client_id;
/**
* 连接connection->id
* @var int
*/
public static $connection_id;
/**
* 旧的session
*
* @var string
*/
public static $old_session;
/**
* 编码session
* @param mixed $session_data
* @return string
*/
public static function sessionEncode($session_data = '')
{
if($session_data !== '')
{
return serialize($session_data);
}
return '';
}
/**
* 解码session
* @param string $session_buffer
* @return mixed
*/
public static function sessionDecode($session_buffer)
{
return unserialize($session_buffer);
}
/**
* 清除上下文
* @return void
*/
public static function clear()
{
self::$local_ip = self::$local_port = self::$client_ip = self::$client_port =
self::$client_id = self::$connection_id = self::$old_session = null;
}
/**
* 通讯地址到client_id的转换
* @return string
*/
public static function addressToClientId($local_ip, $local_port, $connection_id)
{
return bin2hex(pack('NnN', $local_ip, $local_port, $connection_id));
}
/**
* client_id到通讯地址的转换
* @return array
*/
public static function clientIdToAddress($client_id)
{
if(strlen($client_id) !== 20)
{
throw new \Exception("client_id $client_id is invalid");
}
return unpack('Nlocal_ip/nlocal_port/Nconnection_id' ,pack('H*', $client_id));
}
}
/**
* Gateway与Worker间通讯的二进制协议
*
* struct GatewayProtocol
* {
* unsigned int pack_len,
* unsigned char cmd,//命令字
* unsigned int local_ip,
* unsigned short local_port,
* unsigned int client_ip,
* unsigned short client_port,
* unsigned int connection_id,
* unsigned char flag,
* unsigned short gateway_port,
* unsigned int ext_len,
* char[ext_len] ext_data,
* char[pack_length-HEAD_LEN] body//包体
* }
* NCNnNnNCnN
*/
class GatewayProtocol
{
// 发给worker，gateway有一个新的连接
const CMD_ON_CONNECTION = 1;
// 发给worker的，客户端有消息
const CMD_ON_MESSAGE = 3;
// 发给worker上的关闭链接事件
const CMD_ON_CLOSE = 4;
// 发给gateway的向单个用户发送数据
const CMD_SEND_TO_ONE = 5;
// 发给gateway的向所有用户发送数据
const CMD_SEND_TO_ALL = 6;
// 发给gateway的踢出用户
const CMD_KICK = 7;
// 发给gateway，通知用户session更新
const CMD_UPDATE_SESSION = 9;
// 获取在线状态
const CMD_GET_ALL_CLIENT_INFO = 10;
// 判断是否在线
const CMD_IS_ONLINE = 11;