req.body is empty express js - javascript

I have been spending hours trying to figure out why req.body is empty. I have looked everywhere on stackoverflow and tried everything but no luck.
Express.js POST req.body empty
Express req.body is empty in form submission
Express + Postman, req.body is empty
Express js req.body returns empty
I tried setting:
app.use(bodyParser.urlencoded({extended: false})); //false
but it did not change anything
Here is 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 index = require('./routes/index');
var ajax = require('./routes/ajax');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
// 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: true}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(bodyParser.json());
app.disable('etag'); //disable cache control
app.use('/', index);
app.use('/ajax', ajax);
// catch 404 and forward to error handler
app.use(function (req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function (err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
Now let's have a look at ajax.js
var express = require('express');
var router = express.Router();
router.post('/1/kyc/form', function (req, res, next) {
console.log(req.body) //prints {}
});
This is the request done by the client:

The Content-Type header of your request is invalid:
Content-Type: application/json;
The trailing semicolon shouldn't be there. So it should be this:
Content-Type: application/json
FWIW, it's not bodyParser.urlencoded that's being used here; because the body content is JSON, it's bodyParser.json that handles processing the request body. But it's perfectly okay to have both of these body parsers active.
EDIT: if what the client sends is beyond your control (or it's too much of a hassle to fix it client-side), you can add an additional middleware to Express that will fix the invalid header:
app.use(function(req, res, next) {
if (req.headers['content-type'] === 'application/json;') {
req.headers['content-type'] = 'application/json';
}
next();
});
Make sure that you do this before the line that loads bodyParser.json.

Related

File Upload returning "undefined"

So I am using Express File Upload and when I attempt to send a post request to it, it returns the error from the error-handler that is set up, which essentially it couldn't find any files when I console.log(req.files) it returns undefined, which is why the error is being sent back, but I don't know how to fix the problem.
Index.js
router.post('/upload-avatar', async (req, res) => {
try {
console.log(req.files)
if(!req.files) {
res.send({
status: false,
message: 'No file uploaded'
});
} else {
//Use the name of the input field (i.e. "avatar") to retrieve the uploaded file
let avatar = req.files.avatar;
//Use the mv() method to place the file in upload directory (i.e. "uploads")
avatar.mv('./uploads/' + avatar.name);
//send response
res.send({
status: true,
message: 'File is uploaded',
data: {
name: avatar.name,
mimetype: avatar.mimetype,
size: avatar.size
}
});
}
} catch (err) {
res.status(500).send(err);
}
});
App.js
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const fileUpload = require('express-fileupload');
const cors = require('cors');
const bodyParser = require('body-parser');
const _ = require('lodash');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter);
app.use('/users', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
app.use(fileUpload({
createParentPath: true
}));
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
I am using an azure server, and at the moment I am using postman to get it working first!
Thanks In Advance!
Middlewares should be ordered appropriately. Your file upload middleware was placed below your index router. So when a request hits the server Express would run your indexRouter’s handler before the upload middleware and unless your handler calls next(), the file upload middleware would not process your request. And you cannot call next() since it would mean “I’m done with my part, hand this request (req) to the next middleware/handler”.
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const fileUpload = require('express-fileupload');
const cors = require('cors');
const bodyParser = require('body-parser');
const _ = require('lodash');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(fileUpload({
createParentPath: true
}));
app.use(cors());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.use('/', indexRouter);
app.use('/users', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;

req.body throws an empty {}

I am using body-parser but it's not working and I don't know what the problem is.
app.js
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const bodyParser = require('body-parser');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var app = express();
//bodyParser
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter);
app.use('/users', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
index.js
var express = require('express');
var router = express.Router();
/* GET home page. */
router.get('/', redirection, function(req, res, next) {
res.redirect('index', {title: 'Home'});
});
router.get('/country', function(req, res, next) {
// CountryName
res.render('country',
{
title: 'Home',
mainJS: 'main.js',
//country: req.body.countries
});
console.log(req.body)
});
function redirection(req, res){
if (req.url == '/'){
res.redirect('/country');
}
}
module.exports = router;
In this code it throws {}
What is the problem?
Your server only receives a request body in POST (or PUT or PATCH) operations, not in GET operations. You don't have router.post() in your sample code, so it seems you are not handling POSTs. Therefore, no req.body.
You can find your https://example.com/?query=parameters&query2=parameters at req.params.query and req.params.query2.
You can't use the location bar of a browser to do a POST: they from a form posts or xhr / fetch operations.

Node js not returning proper result?

I have this node js program which should return asked variable in the console but it is returning undefined here is code and the input i have trying to parse :-
router.post('/createorder',function(req,res){
console.log(req.body.ProductName);
// var obj=JSON.parse(req.body);
res.send(req.body);
});
the input :
{
"ProductName":"Wine",
"ProductPrice":"500",
"ProductQuantity":"2",
"ProductCost":"1000",
"SellerId":"2"
}
and here is the main module i'm using
var express= require('express');
var routes=require('./routes/api');
var bodyparser=require('body-parser');
var mysql = require('mysql');
var db=mysql.createConnection({
host:'localhost',
user:'root',
password:'',
database:'nodemysql'
})
//setting up express
var app = express();
app.use(bodyparser.urlencoded({extended:false}));
app.use(bodyparser.json());
app.use(routes);
//listen for requests
/*app.get('/',function(req,res){
console.log('get trial method called');
res.send({name:'Atul'});
});*/
app.listen(3000,function(){
console.log('server started on port 3000 ');
});
i want to acess an specific object in order to store in the database?
As soueuls mentioned in the comments, you need to make sure express can parse the body of the request as it doesn't do this by default. Assuming you are using express framework. You could have something like this.
var express = require('express')
var bodyParser = require('body-parser')
var app = express()
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }))
// parse application/json
app.use(bodyParser.json())
Now you can read the body.
notice if you console log your req object before you add in the code above, you will not see the body property.
UPDATE
this is what i have in my app.js file
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 index = require('./routes/index');
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.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
In my routes/index.js i have the following
var express = require('express');
var router = express.Router();
router.post('/createorder',function(req,res){
console.log(req.body);
// var obj=JSON.parse(req.body);
res.send(req.body);
});
module.exports = router;
i tested this with postman app and it works.

Why router in Express/node.js return 404

I just generated Express app and added custom route (/configuration). But if I try to open http://localhost:3000/configuration, server returns 404 Not Found error. I checked the code and don't understand where is error.
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 index = require('./routes/index');
var config_page = require('./routes/configuration');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use('/configuration', config_page);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
routes/configuration.js (routes/index.js is similar)
var express = require('express');
var router = express.Router();
/* GET configuration page. */
router.get('/configuration', function(req, res, next) {
res.render('configuration', { title: 'My App | Configuration' });
});
module.exports = router;
This code is the problem
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
Also the current Url which is generated by your application is http://localhost:3000/configuration/configuration. If you make a query on this then it will work. Now if you wan to use it with http://localhost:3000/configuration. then you need to remove on path from anywhere. May be you can change in main file like this
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', index);
app.use('/',config_page); //-----------> this is the line you need to change
How can it be used for error handling. Remove it and add this code to catch any error in application.
process.on('uncaughtException', function (err) {
// This should not happen
logger.error("Pheew ....! Something unexpected happened. This should be handled more gracefully. I am sorry. The culprit is: ", err);
});

Why is my server returning error 500 while trying to set a cookie?

I have an express v4 server with a route called admin. When the user post a password to the admin route, I want to respond by setting a cookie on the user's browser and sending a small json. For some reason, the server keeps returning error 500 when trying to respond. I'm assuming that this is something to do with the cookie as I can do "res.send()" without any problem. I'm new to express/nodejs so any help is appreciated.
admin.js
var express = require('express');
var router = express.Router();
var cookieParser = require('cookie-parser');
/* POST HANDLER */
router.post('/', function(req, res) {
var on = {'admin' : "on"};
res.cookie(cookie , 'cookie_on').send(on);
});
module.exports = router;
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 routes = require('./routes/index');
var admin = require('./routes/admin');
var blogposts = require('./routes/blogposts');
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.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/admin', admin);
app.use('/blogposts', blogposts);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
Dumb mistake: Cookie should have been 'cookie'...

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