Develop Reference

Node js server. httpstatus - 404

I made a small server. When I am trying to make a get request to my server in browser i can see correct data, but when I am trying to make a post request to my server by code I get httpstatus - 404. Why can it happened?
My server code:
var express = require('express');
var http = require('http');
var app = express();
app.get('/api/check', function(req, res) {
res.send('{"debug": "on"}');
});
exports.app = functions.https.onRequest(app);

You are not accepting POST requests to your API right now, only GET. To accept POST requests, add this:
app.post("/api/example", function(req, res) {
// do your logic here
}

Because your server doesn't have a POST route request handler. So it shows 404 Not Found Message. Add a POST route same as GET

Node.js Server completing same Function as mobile device on browser

This is my first post on stackoverflow so pls forgive me if I'm making post taht already existis. I'm kinda new into HTML and .js, "know basics guy".
I have a mobile app on tablet that has kisok mode browser and I'm using it to connect to my NodeJS Server on RPI (works). I have a lot of HTML's and .js files already in my project.
What I'm trying to find out:
Is it possible to make new seperate HTML or .js file that would do something like remote control with my tablet to server. Example - When I click a button taht same button is clicked on browser on RPI beacuse I have another seperate display on RPI that show same thing and I would use my tablet only as a getter of HTML (so I can show it on tablet) and input method for RPI. (simultaneously on both display but use tablet as input)
Or update all existing HTML and .js on server side (harder way, if this thing is even posbile to do)
Thank you very much for further help!
EXtra edit - code
Here is the server side code!
//var app = require('http').createServer(handler);
//var express = require("express")();
var express = require("express");
//var app = require("express")();
var app = express();
var http = require("http").Server(app);
var path = require("path");
//var io = require('socket.io')(app);
var io = require('socket.io')(http);
var SerialPort = require('serialport');
//previous was app.listen(3000);
http.listen(3000);
//Enabling CORS - for specific localhost port
app.use(function (req, res, next){
res.setHeader('Access-Control-Allow-Origin', 'http://localhost:8080');
res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
res.setHeader('Access-Control-Allow-Credentials', true);
next();
});
function handler(req, res){
console.log(req, res);
}
var serialPort = new SerialPort.SerialPort("/dev/ttyAMA0", {
baudrate: 9600,
dataBits: 8,
parity: "none",
stopBits: 1,
flowControl: false
});
var counter = 0;
serialPort.on("open", function () {
console.log("open");
var service = new Service();
serialPort.on("data", function (data) {
var hexData = data.toString('hex');
console.log(data, hexData);
io.emit('hit', data);
});
});
io.on('connection', function(socket){
console.log('Connected');
//nsmrcek - custom code for accepting data from client side
socket.on("message1",function(data){
});
socket.on("message2",function(data){
});
socket.on("message3",function(data){
});
socket.on("message4", function(data){
});
socket.on("message5", function(data){
});
});
app.use(express.static(path.join(__dirname, '/')));
//app.use('/js', express.static(path.join(__dirname,
app.get("/home",function(req,res,next){
//res.send("OK");
//if fails path incorrect
res.sendFile(path.join(__dirname + "/index.html"));
//res.render("index.html");
});
function Service() {
this.mapCodeToHit = function (data) {
"data send from little homemade CPU board via serial port to RPI server" }
I hope this is enough code so You can instruct me where to put more code to simulate click on evry other client while clicking button on one of the clients (alawys 2 clients)

If you created a websocket connection that ran through your server and pushed the updated state of the button to the connected clients this would certainly be possible. I can't give a detailed answer without seeing your code but you could start with the socket.io docs here and ask more questions as you get started.
http://socket.io/

Request body in express is undefined?

I am making a simple POST request using Alamofire (in iOS) and handling it in node using express.
My code in iOS:
let boop: [String: AnyObject] = ["username":"fakeuser"];
Alamofire.request(.POST,"http://localhost:3000/test", parameters: boop, encoding: .JSON)
And this is my code in node:
var app = require('express')();
var http = require('http').Server(app);
app.post('/test', function(req, res){
console.log("THE SERVER HAS RECEIVED THE POST! \n")
console.log(req.body);
});
http.listen(PORT, function(){
console.log('listening on *:3000');
});
My terminal console prints out "the server has received the post" , so I know that the post is actually triggered. The issue is that instead of logging the req.body, it instead prints out "undefined". I've looked around and it seems like a "body parser" thing needs to be configured but apparently that is obsolete with the new version of express. So I am lost as to what to do.
Any advice?

I'm pretty sure you need to add the body-parser to your express app to parse the JSON.
const bodyParser = require('body-parser');
app.use(bodyParser.json());
See http://expressjs.com/de/api.html#req.body.

Node.js express POST request not getting parameters

I have the following code:
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.post('/rasp', function(req, res) {
res.send("received");
res.send(req.body.data);
});
app.listen(process.env.PORT || 5000);
I used POSTMAN to see if it worked and apparently the "received" text is sent back, but the data parameter is blank. What could be the problem?

Basically, the client sends a request and waits for a single response from your server. Once the client receives that response, it stops waiting for another. Furthermore, Express only allows you to send one response per request (going along with the client stuff explained above). You may be able to change this setting, but I've never dealt with it, so my answer will be limited to that knowledge.
Your server is executing res.send('received'); and the response is handled. You cannot call res.send again. You should be getting an error on your server when you attempt the second call.
You should send all data that the client needs in the first (and only) res.send().
Server responses should not be handled like logging (ex: sending 'received', 'analyzing', etc). Keep the logging separate. The client doesn't want to know all that extra info, it just wants the expected data response.

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.listen(process.env.PORT || 5000);
app.post('/rasp', function(req, res) {
res.send({received:true,data:req.body});
});
can you try this one and writing the response here

I believe your post body is "data=Some Value".
If you want to send multiple chunks of data, you should use res.write, and res.end. In your code change the following lines
res.send("received");
res.send(req.body.data);
to
res.write("received");
res.end(req.body.data);

Value of request params is empty if i use = symbol with request value

I am working on node.js project which uses express framework .
My application will process bunch of POST requests . One of my post request is follows
URL
POST /processit
request params
info={"one":"a=5"}
node.js code
var express = require('express');
var app = express();
app.use(express.bodyParser());
app.post('/processit', function(req, res) {
console.log(req.body);
res.type('text/plain');
res.send('Testing !');
});
app.listen(process.env.PORT || 3000);
In node.js log i am getting respone
{}
But if i change request params from info={"one":"a=5"} to info={"one":"ab5"} i am getting
info={"one":"ab5"}
in node.js log .
I don't know whether i did anything wrong here
ScreenShot :
Thanks in advance .

I suspect your issue is with how your Eclipse test tool is encoding things.
Try doing your POST with curl from the command line, or this Chrome plugin: https://chrome.google.com/webstore/detail/rest-console/cokgbflfommojglbmbpenpphppikmonn?hl=en