Created in FIWARE Q/A platform on 09-06-2015 at 21:06
Answer this issue at http://stackoverflow.com/questions/30741118/fiware-wp-oauth-user-authentication-php-curl

Question:
FiWare WP-OAuth user authentication PHP CURL
Description:
I am using KeyRock from FiWare.org. Previously everything seems to work find but now the rest server after user authorization send me the following response. I have looked at the server response and it seems to be a NULL/Empty response. But on the NodeJS the request is processed seamlessly. I am using wp-oauth plugin and have modified it to work with FiWare. I am sending this request via PHP CURL.

{
"error":

}

Following is the CURL request I am using:

$url = URL_TOKEN . $url_params;
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($curl, CURLOPT_USERPWD, CLIENT_ID . ":" . CLIENT_SECRET);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, (get_option('wpoa_http_util_verify_ssl') == 1 ? 1 : 0));
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, (get_option('wpoa_http_util_verify_ssl') == 1 ? 2 : 0));
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($curl);