129 lines
3.9 KiB
PHP
129 lines
3.9 KiB
PHP
<?php
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namespace Workerman\Connection;
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use Workerman\Events\Libevent;
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use Workerman\Events\Select;
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use Workerman\Events\EventInterface;
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use Workerman\Worker;
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use \Exception;
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/**
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* 异步tcp连接类
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* @author walkor<walkor@workerman.net>
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*/
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class AsyncTcpConnection extends TcpConnection
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{
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/**
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* 连接状态 连接中
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* @var int
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*/
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protected $_status = self::STATUS_CONNECTING;
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/**
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* 当连接成功时，如果设置了连接成功回调，则执行
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* @var callback
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*/
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public $onConnect = null;
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/**
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* 构造函数，创建连接
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* @param resource $socket
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* @param EventInterface $event
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*/
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public function __construct($remote_address)
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{
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// 获得协议及远程地址
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list($scheme, $address) = explode(':', $remote_address, 2);
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if($scheme != 'tcp')
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{
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// 判断协议类是否存在
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$scheme = ucfirst($scheme);
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$this->protocol = '\\Protocols\\'.$scheme;
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if(!class_exists($this->protocol))
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{
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$this->protocol = '\\Workerman\\Protocols\\' . $scheme;
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if(!class_exists($this->protocol))
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{
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throw new Exception("class \\Protocols\\$scheme not exist");
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}
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}
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}
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// 创建异步连接
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$this->_socket = stream_socket_client("tcp:$address", $errno, $errstr, 0, STREAM_CLIENT_ASYNC_CONNECT);
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// 如果失败尝试触发失败回调（如果有回调的话）
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if(!$this->_socket)
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{
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$this->emitError(WORKERMAN_CONNECT_FAIL, $errstr);
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return;
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}
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// 监听连接可写事件（可写意味着连接已经建立或者已经出错）
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Worker::$globalEvent->add($this->_socket, EventInterface::EV_WRITE, array($this, 'checkConnection'));
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}
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/**
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* 尝试触发失败回调
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* @param int $code
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* @param string $msg
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* @return void
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*/
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protected function emitError($code, $msg)
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{
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if($this->onError)
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{
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try{
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call_user_func($this->onError, $this, $code, $msg);
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}
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catch(Exception $e)
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{
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echo $e;
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}
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}
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}
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/**
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* 检查连接状态，连接成功还是失败
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* @param resource $socket
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* @return void
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*/
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public function checkConnection($socket)
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{
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// 删除连接可写监听
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Worker::$globalEvent->del($this->_socket, EventInterface::EV_WRITE);
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// 需要判断两次连接是否已经断开
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if(!feof($this->_socket) && !feof($this->_socket))
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{
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// 设置非阻塞
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stream_set_blocking($this->_socket, 0);
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// 监听可读事件
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Worker::$globalEvent->add($this->_socket, EventInterface::EV_READ, array($this, 'baseRead'));
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// 如果发送缓冲区有数据则执行发送
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if($this->_sendBuffer)
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{
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Worker::$globalEvent->add($this->_socket, EventInterface::EV_WRITE, array($this, 'baseWrite'));
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}
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// 标记状态为连接已经建立
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$this->_status = self::STATUS_ESTABLISH;
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// 为status 命令统计数据
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ConnectionInterface::$statistics['connection_count']++;
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// 如果有设置onConnect回调，则执行
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if($this->onConnect)
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{
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try
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{
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call_user_func($this->onConnect, $this);
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}
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catch(Exception $e)
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{
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self::$statistics['throw_exception']++;
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echo $e;
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}
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}
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}
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else
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{
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// 连接未建立成功
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$this->emitError(WORKERMAN_CONNECT_FAIL, 'connect fail');
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}
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}
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}
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