JS code to ask AWS if an S3 path is a folder with files in it

s3FolderExists.js

function s3FolderExists (s3path, callback) {
	var flHaveCalledBack = false;
	var splitpath = s3.splitPath (s3path);
	var pathToLookFor = splitpath.Key + "/";
	s3.listObjects (s3path, function (obj) {
		if (obj.flLastObject === undefined) {
			if (utils.beginsWith (obj.Key, pathToLookFor)) {
				if (!flHaveCalledBack) {
					callback (true);
					flHaveCalledBack = true;
					}
				}
			}
		else {
			if (!flHaveCalledBack) {
				callback (false);
				flHaveCalledBack = true;
				}
			}
		});
	}