I was going to use selenium webdriver to navigate to a facebook feed and just refresh the page every couple of seconds to check if there is a new post. I will then need to take that post and parse it for data. However this requires my webdriver browser to always to be open. Is there a way to grab the post through the Facebook API or SDK? I really have no experience in this area, and is it possible to do it in Java or C#?
You can subscribe to realtime updates to the the page, which executes a callback on your server whenever the object changes.
The documentation is grey whether or not you can do this for the feed object, but this is one of those features that is being actively developed right now.