Overall looks fine, couple of minor comments.
http://codereview.appspot.com/10269/diff/1/5 File java/gadgets/src/main/java/org/apache/shindig/gadgets/servlet/localfile/LocalFileServlet.java (right): http://codereview.appspot.com/10269/diff/1/5#newcode37 Line 37: * requests from localhost will be honored. Add a comment making it obvious that this should only be used in test environments. http://codereview.appspot.com/10269/diff/1/5#newcode69 Line 69: in = new BufferedInputStream(new FileInputStream(file), BUFFER_SIZE); Use the IOUtils class to do the IO handling, it has built in buffering and youll have less code. http://codereview.appspot.com/10269