how to get response from node server using ajax method in html

Question

i am sending form data to node.js server using ajax function in html page if i use post method i am not able see anything in console as well as alert box.

if i use get method in ajax and app.js file i am getting alert as hello but i am not any msg in console of app.js server

app.js

var express = require('express')
, routes = require('./routes')
, manage = require('./routes/user')
, http = require('http')
, path = require('path');

var app = express();
app.post('/filter', routes.filter);
http.createServer(app).listen(app.get('port'), "172.29.59.65", function(){
console.log('Express server listening on port ' + app.get('port'));
});

index.js

exports.filter = function(req, res){

req.on('data', function (chunk) {  
console.log("Received body data", chunk.toString());
    //chunk is received, process it as you need
  })
req.on('end', function() {
    // http request is competed, send response to client
    res.writeHead(200, "OK", {'Content-Type': 'text/html'});
    res.end("hello");
  })    
};

client.html

<html>
<head>
<script>
function myFunction() { 

var region=document.getElementById("region").value;
var os=document.getElementById("os").value;
alert(region+os);
var data = {};
 data.region = region;
 data.os = os;
 $.ajax({
 type: 'POST',
 jsonpCallback: "callback",
 datatype: 'jsonp',
 data: JSON.stringify(data),
 //contentType: 'application/json',
 url: 'http://172.29.59.65:3000/filter',
 success: function(data) {
   alert(data);
   console.log(JSON.stringify(data));
 },
 error: function (xhr, status, error){
    console.log('Failure');
    alert("failure");
    },
}); 
}
</script>
</head>
<body>
<form>
<input type="text" id="region" name="region"/>
<input type="text" id="os" name="os"/>
<input type="button" value="search" class="fil_search" onclick="myFunction()"/>
</form>
</body>
</html>

my problem is send data to node server and receive the data from node server to html page how to achieve this. please help me out of this.

Alexandr Lazarev · Accepted Answer · 2015-10-27 07:25:20Z

1

You need a middleware to parse post data of the body. You can try bodyParser. First, you should install it:

$ npm install body-parser

And then just require and use it:

var express = require('express')
, bodyParser = require('body-parser')
, routes = require('./routes')
, manage = require('./routes/user')
, http = require('http')
, path = require('path');

var app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.post('/filter', routes.filter);
http.createServer(app).listen(app.get('port'), "172.29.59.65", function(){
console.log('Express server listening on port ' + app.get('port'));
});

Now your POST parameters will be stored in req.body.

exports.filter = function(req, res){
    console.log("Received body data", req.body);
    res.writeHead(200, "OK", {'Content-Type': 'text/html'});
    res.end("hello");
 })    
};

edited Oct 27, 2015 at 7:25

answered Oct 27, 2015 at 6:44

Alexandr Lazarev

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2 Comments

Rapid Over a year ago

i have tried this but not working again "failure" message and along with error called "uncaught exception: out of memory"

Alexandr Lazarev Over a year ago

One more moment I've missed, use req.body instead of chunks, I will update my answer in a minute.

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