I'm running an express.js app, and req.params, req.body, and req.query are empty! Even though I'm trying to send JSON data over POST to it! Order matters. Move all the app.use() calls before app.post and voila. Works.

app.js

var express = require('express');       
                                        
var app = express();                    
                                        
// routes                           
app.post('/payment', function(req, res){
    console.log("======");  
    console.log(req.headers);
    console.log(req.params);            
    console.log(req.body);              
    console.log(req.query);             
    res.send('Hello World\n');          
});

app.use(express.bodyParser());      
app.use(express.methodOverride());  
app.use(app.router);                
app.use(express.logger());                                          

app.listen(3000);

// console.log time

//req.headers
{ 'user-agent': 'curl/7.28.1',
  host: 'localhost:3000',
  accept: 'application/json',
  'content-length': '37',
  'content-type': 'application/x-www-form-urlencoded' }

//req.params
{ path: '/payment',
  method: 'post',
  callbacks: [ [Function] ],
  keys: [],
  regexp: /^\/payment\/?$/i,
  params: [] }

script.sh

$ npm version
{ http_parser: '1.0',
  node: '0.8.15',
  v8: '3.11.10.25',
  ares: '1.7.5-DEV',
  uv: '0.8',
  zlib: '1.2.3',
  openssl: '1.0.1c',
  npm: '1.1.66',
}
$ npm list
├─┬ express@3.1.0
│ ├── buffer-crc32@0.1.1
│ ├── commander@0.6.1
│ ├─┬ connect@2.7.2
│ │ ├── bytes@0.1.0
│ │ ├── formidable@1.0.11
│ │ ├── pause@0.0.1
│ │ └── qs@0.5.1
│ ├── cookie@0.0.5
│ ├── cookie-signature@0.0.1
│ ├── debug@0.7.2
│ ├── fresh@0.1.0
│ ├── methods@0.0.1
│ ├── mkdirp@0.3.3
│ ├── range-parser@0.0.4
│ └─┬ send@0.1.0
│   └── mime@1.2.6
├── stripe@1.3.0

$ curl -i -H "Accept: application/json" -X POST -d '{"bedrooms":"4", "squarefeet":"1250"}' http://localhost:3000/payment