/**
* Compute the content MD5 hash of the request body (streams request body contents to a
* temporary file and incrementaly computes the hash value replacing the requests input
* URL with the URL of the created file).
*
* @param HttpRequest $request
* @return string
*/
protected function computeContentMd5(HttpRequest $request)
{
if (!$request->hasEntity()) {
return md5('');
}
$hash = hash_init('md5');
$in = $request->getEntity()->getInputStream();
$tmp = new \SplTempFileObject();
$fp = $tmp->openFile('wb', false);
try {
flock($fp, LOCK_EX);
while (false !== ($chunk = $in->read())) {
hash_update($hash, $chunk);
fwrite($fp, $chunk);
}
} finally {
@fclose($fp);
}
$request->setEntity(new StreamEntity($tmp->openFile('rb', false)));
return hash_final($hash);
}
