/**
* @param array|string $formats
* @param string $blob
* @return Message
* @throws InvalidMessageException
*/
public function decode($formats, $blob)
{
$formats = (array) $formats;
$prefixLen = 0;
foreach ($formats as $format) {
$prefixLen = max($prefixLen, strlen($format));
}
list($prefix) = explode(Constants::PROTOCOL_DELIM, substr($blob, 0, $prefixLen + 1));
if (!in_array($prefix, $formats)) {
if (in_array(GarbledMessage::NAME, $formats)) {
return GarbledMessage::decode($blob);
} else {
throw new InvalidMessageException("Unexpected message type.");
}
}
switch ($prefix) {
case StdMessage::NAME:
return StdMessage::decode($this->cxnStore, $blob);
case InsecureMessage::NAME:
return InsecureMessage::decode($blob);
case RegistrationMessage::NAME:
return RegistrationMessage::decode($this->appStore, $blob);
case AppMetasMessage::NAME:
return AppMetasMessage::decode($this->certValidator, $blob);
default:
throw new InvalidMessageException("Unrecognized message type.");
}
}
/**
* @param string $entity
* @param string $action
* @param array $params
* @throws GarbledMessageException
* @throws InvalidMessageException
* @return mixed
*/
public function call($entity, $action, $params)
{
$this->log->debug("Send API call: {entity}.{action} over {cxnId}", array('entity' => $entity, 'action' => $action, 'cxnId' => $this->cxnId));
$cxn = $this->cxnStore->getByCxnId($this->cxnId);
$req = new StdMessage($cxn['cxnId'], $cxn['secret'], array($entity, $action, $params, $this->appMeta['appCert']));
list($respHeaders, $respCiphertext, $respCode) = $this->http->send('POST', $cxn['siteUrl'], $req->encode(), array('Content-type' => Constants::MIME_TYPE));
$respMessage = $this->decode(array(StdMessage::NAME, GarbledMessage::NAME), $respCiphertext);
if ($respMessage instanceof GarbledMessage) {
throw new GarbledMessageException($respMessage);
} elseif ($respMessage instanceof StdMessage) {
if ($respMessage->getCxnId() != $cxn['cxnId']) {
// Tsk, tsk, Mallory!
throw new InvalidMessageException('Received response from incorrect connection.');
}
return $respMessage->getData();
} else {
throw new InvalidMessageException('Unrecognized message type.');
}
}
public function decode($formats, $message)
{
$prefixLen = 0;
foreach ($formats as $format) {
$prefixLen = max($prefixLen, strlen($format));
}
list($prefix) = explode(Constants::PROTOCOL_DELIM, substr($message, 0, $prefixLen + 1));
if (!in_array($prefix, $formats)) {
throw new InvalidMessageException("Unexpected message type.");
}
switch ($prefix) {
case StdMessage::NAME:
return StdMessage::decode($this->cxnStore, $message);
case InsecureMessage::NAME:
return InsecureMessage::decode($message);
case RegistrationMessage::NAME:
return RegistrationMessage::decode($this->appId, $this->appPrivKey, $message);
default:
throw new InvalidMessageException("Unrecognized message type");
}
}
