title: Access 'Date' HTTP header in NSURLRequest in iOS
body: <p>Is there a way to access 'Date' HTTP header in NSURLRequest in iOS for example to use it in Authorization process? (e.g. <a href="http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html" rel="nofollow noreferrer">http://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html</a>)</p>