cdn = $cdn;
$this->key = W3TC_CDN_OAUTH_KEY;
$this->secret = W3TC_CDN_OAUTH_SECRET;
$this->base_url = admin_url();
$this->authorize_url = W3TC_CDN_OAUTH_AUTHORIZE_URL;
$this->access_token = W3TC_CDN_OAUTH_ACCESS_TOKEN;
$this->request_token_url = W3TC_CDN_OAUTH_REQUEST_TOKEN_URL;
}
/**
* Requests and returns the authorization tokens. To be used with get_authorize_url.
* Exits application and prints message on WP_Error
*
* @return array
*/
private function _get_auth_request_tokens(){
$test_consumer = new OAuthConsumer($this->key, $this->secret, NULL);
//prepare to get request token
$sig_method = new OAuthSignatureMethod_HMAC_SHA1();
$parsed = parse_url($this->request_token_url);
$params = array('callback' => $this->base_url);
if (isset($parsed['query']))
parse_str($parsed['query'], $params);
$req_req = OAuthRequest::from_consumer_and_token($test_consumer, NULL, "GET", W3TC_CDN_OAUTH_REQUEST_TOKEN_URL, $params);
$req_req->sign_request($sig_method, $test_consumer, NULL);
$page = wp_remote_get($req_req->to_url());
if (is_wp_error($page))
$this->handle_error($page);
parse_str ($page['body'],$tokens);
return $tokens;
}
/**
* Tokens are retrived using get_auth_request_tokens
*
* @param $oauth_token
* @param $oauth_token_secret
* @return string
*/
private function _get_authorize_url($oauth_token, $oauth_token_secret){
$callback_url = $this->base_url . "admin.php?page=w3tc_cdn&w3tc_cdn_oauth_access&key=$this->key&token=$oauth_token&token_secret=$oauth_token_secret&type=$this->cdn&_wpnonce=" .wp_create_nonce('w3tc'). "&endpoint="
. urlencode($this->authorize_url);
$auth_url = $this->authorize_url . "/?oauth_token=$oauth_token&oauth_callback=".urlencode($callback_url);
return $auth_url;
}
/**
* Redirects to authorization url
*/
public function authorize(){
$tokens = $this->_get_auth_request_tokens();
$oauth_token = $tokens['oauth_token'];
$oauth_token_secret = $tokens['oauth_token_secret'];
$auth_url = $this->_get_authorize_url($oauth_token, $oauth_token_secret);
w3_redirect($auth_url);
}
/**
* @abstract
* Returns the API credentials for the CDN
*
* @return array
*/
abstract function get_api_keys();
/**
* @abstract
* Prints the required javascript for extracting API Credentials from page.
*/
abstract function print_javascript();
/**
* Prints error message when the authentication process encounters issue.
* Also exits application.
*
* @param $page
*/
public function handle_error($page){
$messages=$page->errors['http_request_failed'];
wp_die('Authentication process encountered a problem.
'
. 'Details:
'.implode('
',$messages).'
');
exit;
}
}