Express js req.body returns empty - javascript

I've tried the all solutions from some another stackoverflow posts but it didn't solved my issue.
Here is my app.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
var index = require('./routes/index');
var v1 = require('./routes/route');
app.use('/', index);
//routes for api
app.use('/v1',v1);
Here is my post controller
module.exports = {
createUser:function (req,res) {
console.log(req.body);
res.send('ok'+req.body.test);
}
}
req.body returns {} even if the request body contains the parameters.
I am checking the api's with postman plugin.
Update
Postman request

body-parser
The bodyParser object exposes various factories to create middlewares. All middlewares will populate the req.body property with the parsed body, or an empty object {} if there was no body to parse (or an error was returned).
app.use(bodyParser.urlencoded({ extended: true })); // for encoded bodies
A new body object containing the parsed data is populated on the request object after the middleware, req.body will contain the parsed data, this object will contain key-value pairs, where the value can be a string or array
The Content-Type is application/x-www-form-urlencoded
app.use(bodyParser.json()); // for json encoded bodies
A new body object containing the parsed data is populated on the request object after the middleware (i.e. req.body).
The Content-Type is application/json
application/json is used when you are posting the data {"test":"hello"} like this. www-form-url-encoded is used to get the data as key-value in object from the url when used the app.use(bodyParser.urlencoded({ extended: true }));. They both are different and have their own use cases

After removing the last 4 lines of code (to be sure you are configuring correctly the routes) and adding this test lines:
app.post('/ping', function (req,res) {
console.log(req.body);
res.send('ok ' + req.body.test);
});
let server = http.createServer(app);
server.listen(8899, function onstart() {
console.log('server listening');
});
When I run:
curl -X POST http://localhost:8899/ping -d '{"test": 1234}'
I get ok undefined, like you did. After adding the proper content-type header:
curl -X POST http://localhost:8899/ping -d '{"test": 1234}' -H "content-type: application/json"
it works like a charm and I get ok 1234. So I think you are missing the "content-type: application/json" header in your postman.

Related

req.body is NULL {} on POST request

On post request from POSTMAN req.body is sending the data but returns { } when submitting the form.
This is what I used as the middleware,
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false}));
but the word bodyParser is marked with the message 'bodyparser is deprecated'.ts(6385),
The declaration was marked as deprecated here.
I tried using,
app.use(express.json());
app.use(express.urlencoded({ extended: false}));
but still its returning { } on req.body
See the coding line when you are registering dependencies, if you register express json, that should be before your route, so it's look like :
const express = require('express');
const app = express();
// middleware registered here
app.use(express.json());
// then your route
app.post('/someroute', async (req,res,next) => {
const { param1, param2 } = req.body;
try {
console.log(`${param1} and ${param2} written in terminal);
res.send('ok');
} catch (err) {
res.send('oopps');
}
})
Are you sure you're using correct headers when you're sending your POST request?
For .json() parsing, your headers should contain: Content-Type: application/json
For urlencoded() form data parsing, your headers should contain: Content-Type: application/x-www-form-urlencoded
Can you also share the CURL of your Postman request?

Twilio Receive Fax, Body is Empty

I'm trying to get started with Twilio's Programmable Fax API and I have completed their getting started guide. However, when I receive the fax, I log the request body to the console. However, the body is just an empty object.
I'm not sure what is going wrong.
const http = require('http');
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
// Parse any incoming POST parameters
app.use(bodyParser.json({ extended: false }));
// Define a handler for when the fax is initially sent
app.post('/fax/sent', (req, res) => {
// Let's manually build some TwiML. We can choose to receive the
// fax with <Receive>, or reject with <Reject>.
console.log(req.body);
const twiml = `
<Response>
<Receive action="/fax/received" mediaType="application/pdf" storeMedia="true"/>
</Response>
`;
// Send Fax twiml response
res.type('text/xml');
res.send(twiml);
});
// Define a handler for when the fax is finished sending to us - if successful,
// We will have a URL to the contents of the fax at this point
app.post('/fax/received', (req, res) => {
// log the URL of the PDF received in the fax
console.log(req.body);
// Respond with empty 200/OK to Twilio
res.status(200);
res.send(req.body);
});
// Start the web server
http.createServer(app).listen(3000, () => {
console.log('Express server listening on port 3000');
});
And here is what I get back in the console. You can see the empty object that is logged...
Express server listening on port 3000
{}
UPDATE:
I changed the body parser middleware to use urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
And I get the object but I don't see a media url...
With later versions of Express, 4.16.0 - Release date: 2017-09-28, you don't need to require body-parser.
// Body Parser Middleware
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
BodyParser has updated since their documentation was written. You need to do
app.use(bodyParser.urlencoded({ extended: false }));

Request body is null for POST request in NodeJS

I have the below code. when I make a Post request via Postman I get req.body as undefined.
Post Request is http://localhost:1702/es.
Body:
{
"ip_a":"191.X.X.XX",
"pkts":34
}
and Content-Type:"application/json". I also used application/x-www-form-urlencoded but got the same result.
My app.js is:
var express = require('express');
var es=require('./routes/es');
var app = express();
app.post('/es',es.postesdata);
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
And my file where I am receiving a request body null is:
exports.postesdata=function(req,res){
var body=req.body;
console.log(body);//Getting Undefined here
}
Am I doing something wrong here?
express runs middleware in order try:
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.post('/es',es.postesdata);

Can't seem to POST using Python and Node.js

I've looked at various posts on this topic but am still running into an error with this.
Python code:
import requests
import json
url = 'http://127.0.0.1:8080/ay'
payload = {'some': 'data'}
r = requests.post(url, data=payload)
print r.text
print r.status_code
Node.js code:
var app = express();
app.use(bodyparser.urlencoded({
extended: true
}));
app.use(bodyparser.json());
app.post('/ay', function(req, res){
console.log(req.body);
res.send('done');
});
So I've looked at my req and even req.body but req.body returns undefined so I think it's with json=payload but I've also tried params=payload and data=json.dumps(payload)
Edit: I forgot to include bodyparser and urlencoded. I edited my code to show the changes.
You have to use body-parser to get JSON from request body
var bodyparser = require('body-parser');
app.use(bodyparser.json());

How to access the request body when POSTing using Node.js and Express?

I have the following Node.js code:
var express = require('express');
var app = express.createServer(express.logger());
app.use(express.bodyParser());
app.post('/', function(request, response) {
response.write(request.body.user);
response.end();
});
Now if I POST something like:
curl -d user=Someone -H Accept:application/json --url http://localhost:5000
I get Someone as expected. Now, what if I want to get the full request body? I tried doing response.write(request.body) but Node.js throws an exception saying "first argument must be a string or Buffer" then goes to an "infinite loop" with an exception that says "Can't set headers after they are sent."; this also true even if I did var reqBody = request.body; and then writing response.write(reqBody).
What's the issue here?
Also, can I just get the raw request without using express.bodyParser()?
Starting from express v4.16 there is no need to require any additional modules, just use the built-in JSON middleware:
app.use(express.json())
Like this:
const express = require('express')
app.use(express.json()) // <==== parse request body as JSON
app.listen(8080)
app.post('/test', (req, res) => {
res.json({requestBody: req.body}) // <==== req.body will be a parsed JSON object
})
Note - body-parser, on which this depends, is already included with express.
Also don't forget to send the header Content-Type: application/json
Express 4.0 and above:
$ npm install --save body-parser
And then in your node app:
const bodyParser = require('body-parser');
app.use(bodyParser);
Express 3.0 and below:
Try passing this in your cURL call:
--header "Content-Type: application/json"
and making sure your data is in JSON format:
{"user":"someone"}
Also, you can use console.dir in your node.js code to see the data inside the object as in the following example:
var express = require('express');
var app = express.createServer();
app.use(express.bodyParser());
app.post('/', function(req, res){
console.dir(req.body);
res.send("test");
});
app.listen(3000);
This other question might also help: How to receive JSON in express node.js POST request?
If you don't want to use the bodyParser check out this other question: https://stackoverflow.com/a/9920700/446681
As of Express 4, the following code appears to do the trick.
Note that you'll need to install body-parser using npm.
var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.listen(8888);
app.post('/update', function(req, res) {
console.log(req.body); // the posted data
});
For 2019, you don't need to install body-parser.
You can use:
var express = require('express');
var app = express();
app.use(express.json())
app.use(express.urlencoded({extended: true}))
app.listen(8888);
app.post('/update', function(req, res) {
console.log(req.body); // the posted data
});
You should not use body-parser it is deprecated. Try this instead
const express = require('express')
const app = express()
app.use(express.json()) //Notice express.json middleware
The app.use() function is used to mount the specified middleware function(s) at the path which is being specified. It is mostly used to set up middleware for your application.
Now to access the body just do the following
app.post('/', (req, res) => {
console.log(req.body)
})
var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json())
var port = 9000;
app.post('/post/data', function(req, res) {
console.log('receiving data...');
console.log('body is ',req.body);
res.send(req.body);
});
// start the server
app.listen(port);
console.log('Server started! At http://localhost:' + port);
This will help you. I assume you are sending body in json.
This can be achieved without body-parser dependency as well, listen to request:data and request:end and return the response on end of request, refer below code sample. ref:https://nodejs.org/en/docs/guides/anatomy-of-an-http-transaction/#request-body
var express = require('express');
var app = express.createServer(express.logger());
app.post('/', function(request, response) {
// push the data to body
var body = [];
request.on('data', (chunk) => {
body.push(chunk);
}).on('end', () => {
// on end of data, perform necessary action
body = Buffer.concat(body).toString();
response.write(request.body.user);
response.end();
});
});
In my case, I was missing to set the header:
"Content-Type: application/json"
Try this:
response.write(JSON.stringify(request.body));
That will take the object which bodyParser has created for you and turn it back into a string and write it to the response. If you want the exact request body (with the same whitespace, etc), you will need data and end listeners attached to the request before and build up the string chunk by chunk as you can see in the json parsing source code from connect.
The accepted answer only works for a body that is compatible with the JSON format. In general, the body can be accessed using
app.use(
Express.raw({
inflate: true,
limit: '50mb',
type: () => true, // this matches all content types
})
);
like posted here. The req.body has a Buffer type and can be converted into the desired format.
For example into a string via:
let body = req.body.toString()
Or into JSON via:
let body = req.body.toJSON();
If you're lazy enough to read chunks of post data.
you could simply paste below lines
to read json.
Below is for TypeScript similar can be done for JS as well.
app.ts
import bodyParser from "body-parser";
// support application/json type post data
this.app.use(bodyParser.json());
// support application/x-www-form-urlencoded post data
this.app.use(bodyParser.urlencoded({ extended: false }));
In one of your any controller which receives POST call use as shown below
userController.ts
public async POSTUser(_req: Request, _res: Response) {
try {
const onRecord = <UserModel>_req.body;
/* Your business logic */
_res.status(201).send("User Created");
}
else{
_res.status(500).send("Server error");
}
};
_req.body should be parsing you json data into your TS Model.
I'm absolutely new to JS and ES, but what seems to work for me is just this:
JSON.stringify(req.body)
Let me know if there's anything wrong with it!
Install Body Parser by below command
$ npm install --save body-parser
Configure Body Parser
const bodyParser = require('body-parser');
app.use(bodyParser);
app.use(bodyParser.json()); //Make sure u have added this line
app.use(bodyParser.urlencoded({ extended: false }));
What you claim to have "tried doing" is exactly what you wrote in the code that works "as expected" when you invoke it with curl.
The error you're getting doesn't appear to be related to any of the code you've shown us.
If you want to get the raw request, set handlers on request for the data and end events (and, of course, remove any invocations of express.bodyParser()). Note that the data events will occur in chunks, and that unless you set an encoding for the data event those chunks will be buffers, not strings.
You use the following code to log post data:
router.post("/users",function(req,res){
res.send(JSON.stringify(req.body, null, 4));
});

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