gistfile1.py

# For http://stackoverflow.com/questions/21248222/how-can-tornado-serve-a-single-static-file-at-an-arbitrary-location/21248691?noredirect=1#comment32053685_21248691

class MyFileHandler(StaticFileHandler):
    def initialize(self, file_mapping, **kwargs):
        self.file_mapping = file_mapping
        super(MyFileHandler, self).initialize(**kwargs)
        
    @classmethod
    def get_absolute_path(cls, root, path):
        return StaticFileHandler.get_absolute_path(root, self.file_mapping.get(path, path))
        
Application([
    (r'/(foo.json|bar.json)', MyFileHandler, 
        dict(path='/dir/containing/files',
             file_mapping={'foo.json': 'real_foo.json', 'bar.json': 'real_bar.json'})),
             ])