Here's my request:
var xhttp = new XMLHttpRequest();
xhttp.open("GET", "/api/registerRequest?user=user", true);
xhttp.send();
And here's the request being handled:
var express = require("express");
var router = express.Router();
router.get("/registerRequest/:user", function(req, res, next){
console.log("response for param");
console.log(req.params.user);
});
router.get("/registerRequest", function(req, res, next){
console.log("normal response");
console.log();
});
And here's the app:
var express = require("express");
var app = express();
app.use("/api", index);
Note that these are just small, relevant to the question, portions of the code.
Now, the output in the console is
normal response
But from my understanding, it should be:
response for param
user
You're misunderstanding routing.
router.get("/registerRequest/:user" matches URLs of the form /registerRequest/..., where ... becomes req.params.user.
You aren't making such a URL.
In the url /api/registerRequest?user=user, you are sending user as a query parameter. Which will allow you to access it from req.query.user. more here
In order to access it from req.params.user, you'll need to change the url in the ajax request to /api/registerRequest/user. doc reference
Related
I just want to extract an http-Post but I didn't get it working. Can somebody help me please? The request is made by my HTML Frontend using XMLHttpRequest() and the backend is node.js. When I send the request I only get an empty Object {}
Node Backend
var express = require('express');
const bodyParser = require('body-parser');
var app = express();
app.use(express.json());
app.post('/save_options', (req, res) => {
console.log(req.body);
res.sendStatus(200);
});
Frontend
let DATA_FRONTEND_OPTIONS = {
"test":"1"
}
function save_options_to_database() {
var do_it_async = true;
var request = new XMLHttpRequest();
request.onload = function () {
var status = request.status;
var data = request.responseText;
}
request.open("POST", "/save_options", do_it_async);
request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
//request.setRequestHeader("Content-Type", "text/plain;charset=UTF-8");
request.send(JSON.stringify(DATA_FRONTEND_OPTIONS));
}
Simply add
app.use(express.urlencoded());
to your express configuration.
Here is great explanation:
https://stackoverflow.com/a/51844327/8522881
You have to add express.json() and express.urlencoded() for POST request.
Example:
app.use(express.json());
app.use(express.urlencoded());
Because in POST request the data which is sending is in form of some type of data object and you have to tell the server to accept or store that type of data (object), which is enclosed in the body of your POST request.
Above the same solution applied for PUT requests also.
i want to send some json data from my client page to server page of node.js,
here i have my server page :
var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());
app.post('/', function(req,res){
res.send('recieved request');
console.log(req.body);
});
app.listen(8081);
console.log('listening on 8081');
client page:
var name ='someName';
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function(){
if(this.readyState== 4 && this.status == 200){
console.log(this.responseText);
}
};
xhttp.setRequestHeader({'Content-Type': 'application/json'});
xhttp.open('POST', 'http://localhost:8081', true);
xhttp.send(JSON.stringify({'name' : name}));
I got the result as a null json {}.
NOTE: I don't want to about submission of a form , i just want to send JSON data from html file to node.js file.
The correct signature for a call to XMLHTTPRequest#setRequestHeader is setRequestHeader(header, value);
Change
xhttp.setRequestHeader({'Content-Type': 'application/json'});
to
xhttp.setRequestHeader('Content-Type', 'application/json');
Docs: https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/setRequestHeader
Send a parameter(URL) from another script through recursion to this script.
var express = require('express');
var request = require('request');
var cheerio = require('cheerio');
var mongodb = require('mongodb');
var app = express();
var MongoClient = mongodb.MongoClient;
// Connection URL. This is where your mongodb server is running.
var murl = 'mongodb://localhost:27017/getData';
url = '';
app.get('/getData', function(req, res){
firstCall(req,res)
//console.log("cookie",req.cookies);
})
var firstCall = function(req, res, data){
console.log("URL: ", url);
res.send('Check your console!');
}
app.listen('3000')
console.log('Magic happens on port 3000');
module.exports = function(app) {
app.get('/getData', function() {});
};
I want this code to act as backbone or logic board. And some other file should be able to trigger this logic board file by adding the URL to this file.
Like we pass parameters to function to call. How do I do it here.
I am currently working with the Express platform, the Twilio Node.js SMS API and obviously javascript to send text messages to my users. Problem is, I don't know what I should do in order to send data through my GET variables on the front-end and capture those values with node.js on the back-end.
For testing purposes, I created a simple button that sends a text message to a fixed number when clicked.
Here is the javascript side:
function sms() {
xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET","http://localhost:5001", true);
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
alert(xmlhttp.responseText);
}
}
xmlhttp.send();
}
Here is the node.js side:
var accountSid = 'ACCOUNT_SID';
var authToken = 'ACCOUNT_TOKEN';
//require the Twilio module and create a REST client
var client = require('twilio')(accountSid, authToken);
var express = require("express");
var app = express();
app.get('/',function(request,response){
var to = "TO";
var from = "FROM";
client.messages.create({
to: to,
from: from,
body: 'Another message from Twilio!',
}, function (err, message) {
console.log("message sent");
});
});
app.listen(5001);
I have came across two ways to send a responseText from Node.js, but can't manage to make them work
first one using response.send("Hello World"); or the second one response.write("Hello again"); response.end();
So just to sum it up, I want to send variables (to, from, message, etc.) through my http request, capture them in node.js and send a responseText! As a heads up, I'm very comfortable with AJAX requests between JS and PHP, but Node.js is new to me.
Thanks in advance
I think the new Guides will help you out here with How to receive and reply to SMS in Node.js:
https://www.twilio.com/docs/guides/sms/how-to-receive-and-reply-in-node-js
The CodeRail along the right hand side will walk you through it step-by-step but you should pay attention particularly to the section titled "Generate a dynamic TwiML Message".
var http = require('http'),
express = require('express'),
twilio = require('twilio'),
bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.post('/', function(req, res) {
var twilio = require('twilio');
var twiml = new twilio.TwimlResponse();
if (req.body.Body == 'hello') {
twiml.message('Hi!');
} else if(req.body.Body == 'bye') {
twiml.message('Goodbye');
} else {
twiml.message('No Body param match, Twilio sends this in the request to your server.');
}
res.writeHead(200, {'Content-Type': 'text/xml'});
res.end(twiml.toString());
});
http.createServer(app).listen(1337, function () {
console.log("Express server listening on port 1337");
});
I'm visiting a link to my Node app called
http://localhost:5000/payment?issue=123456
In my node app i have a callback that is fired when this happens
app.get('/payment', function(req, res){
res.render('payment', { user: req.user });
});
how do i get the issue number (123456) and assign it to a variable in the node app?
To get the URL params, you can use a module called "url",
var url = require('url');
var url_parts = url.parse(request.url, true);
var query = url_parts.query;
As an Express only alternative you can use the req.query method
app.get('/payment', function(req, res){
issue = req.query.issue;
// Other stuff
});