The body parser body is {}. I've already done research and made sure that my ajax data key is set correctly as well as make sure the middleware is set up correctly as well. Here is my frontend ajax call
$.ajax({
type:"GET",
url:"/api",
data: {course:"MATH-226"},
success: function(data){ alert(data);}
});
And here is my backend server.js file:
'use strict'
const express = require('express');
const path = require('path');
const bodyParser = require('body-parser');
const alg = require('./app/algorithm.js');
const app = express();
app.use('/', express.static(path.join(__dirname, 'public')));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.get('/api', (req, res) => {
console.log(req.body);
alg.create(req.body.course, answer => res.send(answer));
});
let server = app.listen(3000, () => {
let host = server.address().address;
let port = server.address().port;
console.log('Example app listening at http://%s:%s', host, port);
});
You are using a GET request, so it's probably not being sent. If you need to send something, you can attach it as a header or include it in the query string of the url. If you want to send data, I would use a POST request.
Check out this article
How to send data in request body with a GET when using jQuery $.ajax()
Related
I am trying to learn node js. I am tryng to put a post request from axios by frontend but node js is responding with empty object.
Here is the code
node js
var express = require("express");
var app = express();
var cors = require("cors");
app.use(cors());
var bodyParser = require("body-parser");
var urlencodedParser = bodyParser.urlencoded({ extended: false });
// This responds with "Hello World" on the homepage
app.get("/", function (req, res) {
console.log("Got a GET request for the homepage");
res.send("Hello GET");
});
app.post("/", urlencodedParser, function (req, res) {
console.log(req.body);
res.send("Hello GET");
});
var server = app.listen(8081, function () {
var host = server.address().address;
var port = server.address().port;
console.log("Example app listening at http://%s:%s", host, port);
});
frontend
axios.post("http://localhost:8081/", { body: "dan" })
.then((e) => console.log(e))
The response is an empty object.
What should I do?
By default your axios code:
axios.post("http://localhost:8081/",{body:"dan"}).then((e) => console.log(e))
will send the body of the POST request as JSON. Quoted directly from the axios doc.
By default, axios serializes JavaScript objects to JSON
So, you need JSON middleware on your Express server to read and parse that JSON body. Without middleware that is looking for that specific content-type, the body of the POST request will not be read or parsed and req.body will remain empty.
app.post('/', express.json(), function (req, res) {
console.log(req.body);
res.send('Hello POST');
});
Note, there is no need to separately load the body-parser module as it is built-in to Express.
Or, if you want the request to be sent as application/x-www-form-urlencoded content-type, then you would need to encode the data that way and send it as the data in your axios request and set the content-type appropriately.
These request bodies can be handled by the express.urlencoded() middleware in the same way as express.json().
You should use bodyParser.json(), to get the data sent in req.body.
var bodyParser = require('body-parser');
app.use(bodyParser.json());
We should parse request body before access it using middleware in the following way
app.use(bodyParser.json());
I am intending to set up a Node.js server with MongoDB to handle HTTP CRUD requests. Upon setting up my endpoint I was initially able to receive POST/GET requests, however the handling of the document objects became the issue. Upon trying to fix this issue I am now unable to POST/GET at all? Is this simply a syntax issue or is my code doomed?
const MongoClient = require('mongodb').MongoClient;
var QRCode = require('qrcode');
var canvasu = require('canvas');
var express = require('express');
var mongoose = require('mongoose')
var app = express();
var port = process.env.PORT || 3000;
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
var db;
var collection
var Patient = require('./ShiftAssist/models/patientModel');
var router = express.Router();
''
CODE FOR CONNECTION
''
router.get('/patients/:Pnum', function(req,res,next){
Patient.findOne({Pnum:req.params.Pnum},function(err,patient){
if (err) return next(err);
res.json(patient);
})
});
app.use('/', router);
app.listen(3000, function () {
console.log('Example app listening on port ' + port + '!');
});
Expected: GET request to http://127.0.0.1:3000/patients/XXXXXX with a document identifier, returns entire document
Actual: Timeout Error
try to change you route by /patients/:Pnum
and your request should be http://127.0.0.1:3000/patients/XXXXXX
source: https://expressjs.com/en/guide/routing.html
EDIT: Code i used so far
var express = require('express');
var app = express();
var router = express.Router();
router.get('/patients/:Pnum', function (req, res, next) {
setTimeout(() => res.json({ ok: req.params.Pnum }), 1000)
});
app.use('/', router);
app.listen(3000);
I created a simple server using expressjs and have post method but I got strange response to post article and I don't know why it happened. Could anyone mind helping me?
my expected is a JSON format.
Here is my app.js file
const express = require('express');
const mongoose = require('mongoose');
const articleModel = require('./models/article');
const bodyParser = require('body-parser');
enter code here
const db = mongoose.connect('mongodb://0.0.0.0:27017/bbs-api');
const app = express();
const port = process.env.PORT || 3000;
//support parsing of application/x-www-form-urlencoded post data
app.use(bodyParser.urlencoded({extended:true}));
// support parsing of application/json type post data
app.use(bodyParser.json());
const bbsRouter = express.Router();
bbsRouter.route('/articles').post( (req, res) => {
console.log(req.body);
// const newArticle = new articleModel(req.body);
// newArticle.save();
// res.status(201).send(newArticle);
res.send(req.body);
});
app.use('/api', bbsRouter);
app.get('/', (req, res) => res.send('Hello World!'))
app.listen(port, () => console.log('Example app listening on port 8000!'))
My postman. I log request body out but it is not as my expectation.
if you are sending form data(application/x-www-form-urlencoded) the you can do
bbsRouter.route('/articles').post( (req, res) => {
console.log(req.params);
// const newArticle = new articleModel(req.body);
// newArticle.save();
// res.status(201).send(newArticle);
res.send(req.params);
});
You're sending the wrong request body via postman, your body should be JSON format, not form data
Try removing body-parser and use middlewares directly from express and set urlencoded to false:
app.use(express.urlencoded({extended:false}));
// support parsing of application/json type post data
app.use(express.json());
See here urlencoded option documentation
I am trying to post data from postman to my node server, I keep getting 404.
Is my code setup correctly to receive post to http://localhost:8080/back-end/test and if not how can I fix it ?
var express = require('express');
var request = require('request');
var nodePardot = require('node-pardot');
var bodyParser = require('body-parser');
var rp = require('request-promise');
var app = express();
var port = process.env.PORT || 8080;
// Start the server
app.listen(port);
app.use(bodyParser.json()); // support json encoded bodies
app.use(bodyParser.urlencoded({extended: true})); // support encoded bodies
console.log('Test server started! At http://localhost:' + port); // Confirms server start
var firstFunction = function () {
return new Promise (function (resolve) {
setTimeout(function () {
app.post('back-end/test.js', function (req, res) {
console.log(req.body);
var login = req.body.LoginEmail;
res.send(login);
resolve({
data_login_email: login
});
});
}, 2000);
});
};
I am posting LoginEmail and keep getting 404.
Move app.post() outside of the timeout, promise, and firstFunction.
There is no proceeding paths defined in your code, so the path must start with a /: /back-end/test.js. Don't forget the extension since you've defined it.
I am trying to make POST work with Express (4.13.3 version). when I print request.body.user, it says 'undefined'. I am using Chrome Poster to post my JSON request. Here is how my request looks
{
"user":"testUser",
"password":"test pwd"
}
the URL I use: http://localhost:4000/first
and my server.js file.
var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.post('/first', function (request, response) {
console.log('FIRST POST hello world');
console.log('req.body:' + request);
var user_name=request.body.user;
var password=request.body.password;
console.log("User name = "+user_name+", password is "+password);
response.end("yes");
});
var server = app.listen(4000, function() {
var host = server.address().address;
var port = server.address().port;
console.log('Example app listening at http://%s:%s', host, port);
});
when I post the request, here is what I see on my Node console.
Example app listening at http://:::4000
FIRST POST hello world
req.body:[object Object]
User name = undefined, password is undefined
Why I am not able to get my 'user' and 'password' values here from my request? I am getting 'undefined' for both of these variables.
try this:
app.use(bodyParser());
if this still doesn't work change your request to this:
user=testUser&password=test+pwd
This is how the request body have to look using Chrome's "Advanced REST Client".