function publisher_authenticate_request()
{
// Make sure the API key header exists.
$headers = publisher_get_request_headers();
if (!array_key_exists('x-publisher-apikey', $headers)) {
return publisher_authentication_error('The header X-Publisher-APIKey does not exist.', 'NoAPIKeyHeader');
}
// Make sure this is a POST request.
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
return publisher_authentication_error('The publisher API only supports POST requests.', 'POSTOnly');
}
// Check the validity of the API key.
$valid = false;
if ($headers['x-publisher-apikey'] == publisher_get_api_key()) {
$valid = true;
} elseif (defined('AC_API_MASTER_KEY') && $headers['x-publisher-apikey'] == AC_API_MASTER_KEY) {
$valid = true;
}
if (!$valid) {
return publisher_authentication_error('The provided API key is incorrect.', 'IncorrectAPIKey');
}
// Make sure we have a remote key.
if (!array_key_exists('x-publisher-remote', $headers)) {
return publisher_authentication_error('The header X-Publisher-Remote does not exist.', 'NoRemoteHeader');
}
// Make sure the remote header is valid.
$remote = publisher_get_remote_by_key($headers['x-publisher-remote']);
if ($remote === false) {
return publisher_authentication_error('The specified remote does not exist.', 'RemoteDoesntExist');
}
// Make sure we have an origin header.
if (!array_key_exists('origin', $headers)) {
return publisher_authentication_error('The origin header does not exist.', 'NoOriginHeader');
}
// Check to see if the URL in the remote matches the origin.
if (publisher_normalize_remote_url($remote->url) != publisher_normalize_remote_url($headers['origin'])) {
return publisher_authentication_error('The remote URL (' . publisher_normalize_remote_url($remote->url) . ') does not match the origin URL (' . publisher_normalize_remote_url($headers['origin']) . ').', 'OriginRemoteMismatch');
}
// Make sure the remote is enabled.
if (!$remote->enabled) {
return publisher_authentication_error('The remote is not enabled.', 'RemoteNotEnabled');
}
// Make sure the remote is set to receive content.
if (!$remote->receive) {
return publisher_authentication_error('This site cannot receive content from this remote.', 'CantReceiveContent');
}
return $remote;
}
protected function generateHeaders()
{
global $base_url;
$headers = array();
$headers['x-publisher-apikey'] = $this->remote->api_key;
$headers['x-publisher-remote'] = \publisher_get_api_key();
$headers['origin'] = $base_url;
$headers['Content-Type'] = 'application/json';
$curl_headers = array();
foreach ($headers as $key => $value) {
$curl_headers[] = $key . ': ' . $value;
}
return $curl_headers;
}