node.js - HTTP requests makes server hang -

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i trying build rest api in expressjs, far i've had lot of trouble generating json responses. if send new record post requests 1 of endpoints, gets inserted database, server keeps hanging , doesnt respond. likewise, if make request 1 of resources, nothing happens, server hangs again.

routes file:

'use strict'  calendar = require './models/calendar'  module.exports = (app, express) ->   router   = express.router()    # log http requests console   router.use (req, res, next) ->     console.log req.method, req.url     next()    # calendar routes   router.get '/calendars', (req, res) ->     calendar.find (err, calendars) ->       if err res.send(err)       res.json(calendars)    router.post '/calendars', (req, res) ->     calendar = new calendar     calendar.name = req.body.name      calendar.save (err, calendar) ->       if err next(err)       res.json(200,   calendar)     # namespace api    app.use('/api', router)

server file:

'use strict';  express = require 'express' path    = require 'path' fs      = require 'fs'  # set default node environment development process.env.node_env = process.env.node_env || 'development';  config = require './server/config/config' app = express() require('./server/config/express') app require('./server/routes') app, express  # start server app.listen config.port, config.ip, ->   console.log 'express server listening on %s:%d, in %s mode', config.ip, config.port, app.get 'env'  # expose app exports = module.exports = app;

config file:

path         = require 'path' express      = require 'express' favicon      = require 'static-favicon' cookieparser = require 'cookie-parser' errorhandler = require 'errorhandler' session      = require 'express-session' config       = require './config' mongostore   = require('connect-mongo') session bodyparser   = require 'body-parser'   module.exports = (app) ->   env = app.get 'env'   if env 'development'     app     .use require('connect-livereload')()     .use errorhandler()      #disables caching of scripts in development module     #todo: paths?     .use (req, res, next) ->       res.header 'cache-control', 'no-cache, no-store, must-revalidate'       res.header 'pragma', 'no-cache'       res.header 'expires', 0       next()    sessionstore = new mongostore     url: config.mongo.uri     collection: 'sessions'    app   .use express.static path.join config.root, '.tmp'   .use express.static path.join config.root, 'client'   .use bodyparser.json()   .use bodyparser.urlencoded(extended: true)    .set 'views', "#{config.root}/client"   .set 'view engine', 'jade'   .use cookieparser()   .use session     secret: 'my-little-secret'     store: sessionstore


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