Express sample to map queryParams in one route

routing_by_object_mappings.js

var express = require('express')
var app = express()

app.get('/', function (req, res) {
  
              var params = {};
                if (!_.isUndefined (req.params.param1)) { params.param1 =  req.params.param1; }
                if (!_.isUndefined (req.params.param2)) { params.param2 =  req.params.param2; }
                if (!_.isUndefined (req.params.param3)) { params.param3 =  req.params.param3; }

            var findAll = function()  { statsServices.findAll('months',req.timings, function(data) { salamandraResponse(req,res,data,true);}) };

            var map = [
                { args : ['param1','param2','param3'], caller: findAll },
                { args : ['param2','param3'], caller: func1 },
                { args : ['param1'], caller: function()  { statsServices.findAll('plans',req.timings, function(data) { salamandraResponse(req,res,data,true);}) } },
                { args : ['param1','param3'], caller: function()  { statsServices.findAll('logic',req.timings, function(data) { salamandraResponse(req,res,data,true);}) } }
            ];

            var cosa = _.find(map,function(line) {
                return _.isEqual(_.keys(params),line.args);
            });

          cosa.caller();
})

var server = app.listen(3000, function () {

  var host = server.address().address
  var port = server.address().port

  console.log('Example app listening at http://%s:%s', host, port)

})