/**
* initialize REST Http Client
*
* @param string $spec_file
* @return array $specs
*/
protected function _init_client()
{
$base_url = $this->_specs['base_url'];
$this->_base_url = $base_url;
$client = RESTHttpClient::connect($base_url);
$client->addHeader('Accept-Charset', 'ISO-8859-1,utf-8');
#TODO: manage exception
$this->_client = $client;
}
