Node.js Express Can't get Post Data - node.js

Question

When I post to /insertUser and it schema.saveUser(req) it doesn't find the correct data. I am using node-inspector and it can't find my post data. I have also tried req.body and it finds nothing. I am sending a json
var express = require('express');
var bodyParser = require('body-parser');
var schema = require("./schemas");
var app = express();
app.get('/hello.txt', function(req, res){
res.send('Hello World2');
});
app.post('/insertUser', function(req, res){
console.log("Request handler 'insertUser' was called.");
//console.log(req.body);
schema.saveUser(req);
response.writeHead(200, {"Content-Type": "text/plain"});
res.send("You've sent the text: " + req);
response.write("The following data has been saved to the database: " + jsonString);
res.end();
});
var server = app.listen(8888, function() {
console.log('Listening on port %d', server.address().port);
});
function saveUser(postData){
var jsonObj = JSON.parse(postData);
var newUser = new User({
name: jsonObj.name,
email: jsonObj.email,
photoURL: jsonObj.photourl,
groups: jsonObj.groups
});
newUser.save(function(err, newUser) {
if (err) return console.error(err);
console.dir(newUser);
});
}
edit:
SyntaxError: Unexpected token o
at Object.parse (native)
at Object.saveUser (schemas.js:42:22)
at Object.handle (server.js:25:9)
at next_layer (route.js:103:13)
at Route.dispatch (route.js:107:5)
at c (index.js:195:24)
at Function.proto.process_params (index.js:251:12)
at next (index.js:189:19)
at next (index.js:166:38)
at Layer.urlencodedParser [as handle] (index.js:70:44)

Answer 1

In the client
Cannot GET /insertUser means this is a GET route which is called by the browser when clicking on a link or entering the page URL.
But you specified app.post('/insertUser'... which means that the route will be called only when using the POST method (used when submitting forms for instance, NEVER when clicking on links)
If this is the result of a form, don't forget to specify the method (<form method="post">). Same for ajax calls.
If you want to test in dev mode you can use Postman on chrome to easily call POST routes. If you don't have chrome use curl.
Back-end
Express body parser isn't included in express 4.0 so you need to install it then use it:
var express = require('express');
var bodyParser = require('body-parser');
var schema = require("./schemas");
var app = express();
app.use(bodyParser());
app.get('/hello.txt', function(req, res){
res.send('Hello World2');
});
Then you can use req.body

Answer 2

I think in Express 4 you need to use router object instead of app to define the routes... Something like this:
var express = require('express');
var bodyParser = require('body-parser');
var schema = require("./schemas");
var app = express();
var router = express.Router();
router.get('/hello.txt', function(req, res){
res.send('Hello World2');
});
router.post('/insertUser', function(req, res){
console.log("Request handler 'insertUser' was called.");
});
...