handlerForSearch

[njsfield]

function handlerForSearch (request, response) {
  var searchTerm = request.url.split('?q=')[1];
  response.writeHead(200, {'content-type': 'text/plain'});
  response.end(JSON.stringify(runSmartMatch.smartMatch(searchTerm).slice(0, 10)));
}

Incase there are any issues of the formatting of queries that are passed into this function, use a module like 'url', where you can use .parse methods to access different segments of the url (an object for query holds key and value pairs for the query).
You could then easily have a few checks to see if query formatting is correct and provide a fail case if not