function onReceive($serv, $fd, $from_id, $data)
{
if (!isset($this->_buffer[$fd]) or $this->_buffer[$fd] === '') {
//超过buffer区的最大长度了
if (count($this->_buffer) >= $this->buffer_maxlen) {
$n = 0;
foreach ($this->_buffer as $k => $v) {
$this->close($k);
$n++;
//清理完毕
if ($n >= $this->buffer_clear_num) {
break;
}
}
$this->log("clear {$n} buffer");
}
//解析包头
$header = unpack(self::HEADER_STRUCT, substr($data, 0, self::HEADER_SIZE));
//错误的包头
if ($header === false) {
$this->close($fd);
}
$header['fd'] = $fd;
$this->_headers[$fd] = $header;
//长度错误
if ($header['length'] - self::HEADER_SIZE > $this->packet_maxlen or strlen($data) > $this->packet_maxlen) {
return $this->sendErrorMessage($fd, self::ERR_TOOBIG);
}
//加入缓存区
$this->_buffer[$fd] = substr($data, self::HEADER_SIZE);
} else {
$this->_buffer[$fd] .= $data;
}
//长度不足
if (strlen($this->_buffer[$fd]) < $this->_headers[$fd]['length']) {
return true;
}
//数据解包
$request = self::decode($this->_buffer[$fd], $this->_headers[$fd]['type']);
if ($request === false) {
$this->sendErrorMessage($fd, self::ERR_UNPACK);
} else {
//当前请求的头
self::$requestHeader = $_header = $this->_headers[$fd];
//调用端环境变量
if (!empty($request['env'])) {
self::$clientEnv = $request['env'];
}
//socket信息
self::$clientEnv['_socket'] = $this->server->connection_info($header['fd']);
$response = $this->call($request, $_header);
//发送响应
$ret = $this->server->send($fd, self::encode($response, $_header['type'], $_header['uid'], $_header['serid']));
if ($ret === false) {
trigger_error("SendToClient failed. params=" . var_export($request, true) . "\nheaders=" . var_export($_header, true), E_USER_WARNING);
}
//退出进程
if (self::$stop) {
exit(0);
}
}
//清理缓存
unset($this->_buffer[$fd], $this->_headers[$fd]);
return true;
}
/**
* 调用远程函数
* @param $request
* @return array
*/
protected function call($request, $header)
{
if (empty($request['call'])) {
return array('errno' => self::ERR_PARAMS);
}
//函数不存在
if (!is_callable($request['call'])) {
return array('errno' => self::ERR_NOFUNC);
}
//调用端环境变量
if (!empty($request['env'])) {
self::$clientEnv = $request['env'];
}
//请求头
self::$requestHeader = $header;
//socket信息
self::$clientEnv['_socket'] = $this->server->connection_info($header['fd']);
$ret = call_user_func_array($request['call'], $request['params']);
if ($ret === false) {
return array('errno' => self::ERR_CALL);
}
return array('errno' => 0, 'data' => $ret);
}
