code: function (path, onDone) {
  
  		var options = {cookie: cookie};
  		var contentType = contentTypesByExtension[pathLib.extname(path)];
  		if (contentType) 
  			options['content_type'] = contentType;
  				
  		LOG.sys('try to serve: ' + path, 'handlers.REST_web');
  
  		/*
  		*/
  		
  		// NOTE: file can either not exist, or path can be a directory, need to consider both cases
  		l_readFile(path, function (data) {				
  			if (data) {
  				LOG.sys('finished reading file: ' + path, 'handlers.REST_web');
  				onReturnFile(data, options);
  				UTIL.safeCall(onDone, true);
  			}
  			else
  				UTIL.safeCall(onDone, false);
  		});		
  	}
docs: server a particular file, returns true/false