/**
* Get a connection handle
*
* If keep-alive connections are used, the handle will be stored and re-used
*
* @throws ClientException
* @return resource - connection handle
*/
private function getHandle()
{
if ($this->_useKeepAlive && $this->_handle && is_resource($this->_handle)) {
// keep-alive and handle was created already
$handle = $this->_handle;
// check if connection is still valid
if (!feof($handle)) {
// connection still valid
return $handle;
}
// close handle
@fclose($this->_handle);
$this->_handle = 0;
if (!$this->_options[ConnectionOptions::OPTION_RECONNECT]) {
// if reconnect option not set, this is the end
throw new ClientException('Server has closed the connection already.');
}
}
// no keep-alive or no handle available yet or a reconnect
$handle = HttpHelper::createConnection($this->_options);
if ($this->_useKeepAlive && is_resource($handle)) {
$this->_handle = $handle;
}
return $handle;
}
