private function getCanonicalizedParameterString(PostBodyInterface $body)
{
$params = $body->getFields();
unset($params['Signature']);
uksort($params, 'strcmp');
$str = '';
foreach ($params as $key => $val) {
$str .= rawurlencode($key) . '=' . rawurlencode($val) . '&';
}
return substr($str, 0, -1);
}
/**
* Add a file to the postBody.
*
* @param PostBodyInterface $postBody
* @param string $fieldName
* @param string|array $filePath
*/
private function addFile(PostBodyInterface $postBody, $fieldName, $filePath)
{
$filename = null;
// Backward compatibility code
if (is_array($filePath)) {
$filename = $filePath['remoteName'];
$filePath = $filePath['filePath'];
}
// Remove leading @ symbol
if (strpos($filePath, '@') === 0) {
$filePath = substr($filePath, 1);
}
$postBody->addFile(new PostFile($fieldName, fopen($filePath, 'r'), $filename));
}