/**
* Signs the Request so it can be dispatched.
*
* @param Request $request The Request to Sign
* @return $this
*/
public function signRequest(Request $request)
{
if ($request->isSigned()) {
return $this;
}
$query = $request->getQuery();
$query['auth_key'] = $this->credentials->getAuthKey();
$query['auth_timestamp'] = time();
$query['auth_version'] = '1.0';
if (!is_null($request->getBody())) {
$query['body_md5'] = md5($request->getBody());
}
ksort($query);
$queryString = urldecode(http_build_query(array_change_key_case($query, CASE_LOWER)));
$stringToSign = $request->getMethod() . "\n" . $request->getUri() . "\n" . $queryString;
$query['auth_signature'] = hash_hmac('sha256', $stringToSign, $this->credentials->getAuthSecret());
$request->setQuery($query);
$request->setSigned(true);
return $this;
}