node.js - Meteor picker server side router use express middleware -

i trying use express functions res.send('string') or res.json(json) in meteor rest api using picker server side router. in documentation, says :

you can use existing connect , express middlewares without issues.

how can use express funtions res.send , res.json ? when try use them, tells me not function.

i have following main.js file server :

import { meteor } 'meteor/meteor'; import { picker} 'meteor/meteorhacks:picker';  var bodyparser = meteor.npmrequire('body-parser'),     methodoverride = meteor.npmrequire('method-override'),     logger = meteor.npmrequire('morgan');  picker.middleware(bodyparser.json()); picker.middleware(bodyparser.urlencoded({extended:false})); picker.middleware(logger('dev')); picker.middleware(methodoverride('x-http-method'));          // microsoft picker.middleware(methodoverride('x-http-method-override')); // google/gdata picker.middleware(methodoverride('x-method-override'));  meteor.startup(() => {     console.log('meteor server started');      var postroutes = picker.filter(function(req, res) {         return req.method == "post";     });      postroutes.route('/post/:id', require('./routes/helloworld')); }); 

and following route action (routes/helloworld.js) :

function helloworld(params, req, res, next) {     res.send('id:' + params.id);  }  module.exports = helloworld; 

i following error :

typeerror: res.send not function 

it yells same error when try use res.json...

packages.json :

{     "body-parser": "1.15.2",     "chai": "3.5.0",     "chai-http": "3.0.0",     "method-override": "2.3.6",     "mocha": "3.0.2",     "moment": "2.14.1",     "moment-timezone": "0.5.5",     "morgan": "1.7.0",     "supertest": "2.0.0",     "supertest-as-promised":"4.0.0",     "express":"4.14.0" } 

update found can mimic res.json code :

function helloworld(params, req, res, next) {     console.log(req.body);     res.setheader( 'content-type', 'application/json' );     res.end( json.stringify({id:params.id}) ); }  module.exports = helloworld; 

as picker/meteor not using express, not have res.send() , res.json().

however, can explore restivus, high level api wrapper handle json automatically.

http://meteorpedia.com/read/rest_api#restivus

following sample code above link:

if(meteor.isserver) {   meteor.startup(function () {     // global configuration     api = new restivus({       version: 'v1',       usedefaultauth: true,       prettyjson: true     });      // generates: get/post on /api/v1/users, , get/put/delete on /api/v1/users/:id      // meteor.users collection (works on mongo collection)     api.addcollection(meteor.users);     // that's it! many more options available if needed...      // maps to: post /api/v1/articles/:id     api.addroute('articles/:id', {authrequired: true}, {       post: {         rolerequired: ['author', 'admin'],         action: function () {           var article = articles.findone(this.urlparams.id);           if (article) {             return {status: "success", data: article};           }           return {             statuscode: 400,             body: {status: "fail", message: "unable add article"}           };         }       }     });   }); }