title: Is there some way to determine mobile operation system (iOS,Android, etc.) from the http request to the server?
body: <p>I have RESTful web service and mobile clients (applications)for Android, iOS, WinPhone 8 and BlackBerry. Interaction with the server is implemented by sending http requests with parameters to the server. And I wonder can I in some way determine OS type from which this request was sent (by http content or something else)? I know i can add specific field as a parameter to the request but I don't like such a solution. I know there is a way to determine an OS type via mobile browser. May be  similar idea can be used for my mobile applications or each mobile OS add some specific information to the http request or whatever. Thanks in advance!</p>