I want to create a private backend for an application I want to make, but I am having trouble connecting to my node server, I have the basic stuff right now,
var http = require("http");
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html'});
res.end('<html><body><h1>Hello World</h1></body></html>');
}).listen(3000);
console.log('Server running on port 300.')
But this only works for https://localhost:3000/, how do I make it so that if I have a separate computer on a separate connection, I can connect to this server?
I am not interested in just opening it to everyone but just to specific client IP's...
If the client IP's are on the same network as you, you can check out this question
If you want people from anywhere to access your application, I suggest hosting it on something like Heroku (very easy to deploy, pretty good free tier). You can then create a whitelist of IPs in your express application.
I would suggest for any port forwarding using ngrok or configuration in your router
For downloading ngrok https://ngrok.com/ go to this link
For configuration your router it will take some searching in google based on what type of router your using
You must mention that your localhost or Nat Ip and your public IP to resolve here is NOIP refrence https://www.noip.com/support/knowledgebase/general-port-forwarding-guide/
As you specified that you want the backend to be private, such that it can only be accessed by your specified node. You will have to host this node server on a cloud service or you can host it on your local machine by opening a port for the node server. Suppose you host the node server on port 1234 on your local machine ip address.
You can start the node server on localhost and your desired port, but you need to allow requests to the particular port.
Now you need to check for the origin of the request that your node server receives and validate that, so that only your private node(computer) can access the node server. You can do that by validating the hostname using express, you can get the hostname of the request in express.js using req.hostname or req.headers.host.
You would need to use express.js for this functionality and the code would be as follows
let express = require('express');
let app = express();
let allowedHost = 134.32.234.3 // the hostname which is allowed to access the backend
let port = 1234; // desired port
let host = 0.0.0.0 // desired host; 0.0.0.0 to host on your ip
app.get((req, res) => {
res.header('Content-Type', 'text/html');
if(req.hostname == allowedHost){
res.send('<html><body><h1>Hello World</h1></body></html>');
}
else{
res.send('Connection not allowed');
}
});
app.listen(host, port, ()=>{
console.log(`The server is running on http://${host}:${port}`);
}
Related
So I got this small express server running. I can connect it to other devices on my local network e.g. mobile and other PC.
However when connecting over my 4g it does not work. Is there any reason for this? I am sure when I ping other private addresses on remote networks it has worked before, why not now?
Code:
const express = require("express");
const server = express();
const PORT = 3000
server.use(express.static("static"));
server.get("/", (req,res)=>{
res.sendFile(__dirname + "/pages/index.html")
});
server.listen(PORT, "0.0.0.0", (req,res) => {
console.log("Listening on port ", PORT)
});
Any information would be apricated I have some networking experience (still a noob just studying) and this really does interest me.
I assume you are trying to reach the server via your local IP. But you are doing it with 4G (in your phone maybe), which means your request is going over the internet while your local IP is only valid in your network.
Even if you are using your public IP, you would probably have to configure port forwarding on your router for it to know how to handle the incoming traffic for this port.
If you host your express server in your private network , you must have access to the express server by create port forwarding, destination nat, or some kind of publishing private services to public world methods.
If you need more help , i need to know more about your network env , your public ip and ...
Feel free to ask
An have a productive day
i am trying to url in node.js project
currently show in my local server port like -http://localhost:1337
expected url =http://localhost:1337/nodeprovider
var http = require('http');
var port = process.env.port || 1337;
http.createServer(function (req, res) {
res.writeHead(200, { 'Content-Type': 'text/plain' });
res.end('Hello World\n');
}).listen(port);
If I understood you right: you need your node.js server to response on http://abcwebsite
/nodeprovider
Since this that task must be done not in Node.js server I suggest you to read about domain parking: https://en.wikipedia.org/wiki/Domain_parking
Making long thing short: Node.js server is not responsible for domain name it responds on. Inside server script you can only set port to listen.
From an old answer
You dont assign a domain to a node.js server, instead you load your app onto a machine which has an ip adress. You then need to make sure your app is listening on the correct port, which on most servers is 80.
now getting a domain name to point to this ip adress is an entirely separate matter. You need to make your name server point to the ip. Your name server will usually be the company you bought the domain name through, for instance GoDaddy is a Domain Name Server (DNS). So if you had a domain name with them, you would go on their site under DNS settings and change the ip adress. Your domain name will then point to your ip adress and should render your node.js app.
So I create a NodeJs express app which I can reach by using my local ip-address (192.168.x.x), but when I use my ISP provided Ipv4 address I got "connection timed out".
The things that I done to make it live:
I disable firewall on ubuntu 16.04.
Open port at my router.
Even I put my local ip-address in DMZ.
If you have any suggestion please let me know!
My very simple code is here:
const app = require('express')();
app.get('/health-check', (req, res) => res.sendStatus(200));
app.listen(25565, "0.0.0.0");
So I have two questions about the topic. I have purchased a VPS with digitalocean.com to host my node.js app and they gave me an example hello world app to start.
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
var html = "hello world";
res.end(html);
}).listen(8080, 'localhost');
console.log('Server running at http://localhost:8080/');
So this code works locally and when I host on the VPS I replace 'localhost' with the IP address of my VPS and it is available on the web when I go to http://IP_Address_of_VPS:8080
My first question: How do I host it live on the web but have it point to my IP address? When I replace 'localhost' with my IP address it does not work when I go to http://my_IP_Address:8080
My second question:
I made a test app following a node.js tutorial and here is the code
var PORT = process.env.PORT || 8080;
var express = require('express');
var app = express();
var http = require('http').Server(app);
app.use(express.static(__dirname + '/public'));
http.listen(PORT, function(){
console.log('listening on port *:'+PORT);
});
Where public is the folder with a simple html page. This app works when I run it locally at http://localhost:8080
Can someone explain how the second app runs locally when I did not specify 'localhost' in the http.listen() function? Also how do I point the second app to run from my IP address if the process is any different from the first?
First question
I hope I understood your question right, here is an attempt at an answer :)
Depends a bit on what you mean with 'my ip address'. If it is your public ip adress, you might have to set up port forwarding. Most routers will deny traffic from the outside network (which you are doing when connecting to your own public ip address) to the internal network by default.
If you mean a private ip address (local to the local network) you need to you use your public ip address and set up port fowarding.
When you set up port forwarding to your local machine you might also want to make your private ip address static.
However, I do not recommend using your home computer as a production server. You will need to solve a lot of problems like making your network secure and having low downtime.
Second question
When no hostname is passed to http.listen, the server will accept connections on all adresses. See documentation for more information.
This works, because when you omit arguments in a function call, they will default toundefined. For example, http.listen(8080) might appear as http.listen(8080, undefined, undefined, undefined). Inside the function body these will often be substituted with some default value.
The process of making your app available to the rest of the world should not be any different.
I use express and a server cloud on AWS (Amazon Web Server) and a DNS "mydomain.com".
Question: how can I avoid my users to have to writing in the Browser-URL: http://mydomain.com:4000 and https://mydomain.com:3000
This is my code:
sudo node app.js
var app = express();
var server = http.createServer(app).listen(4000, function() {
console.log('Express HTTP server listening on port ' + app.get('port'));
});
var server = https.createServer(credentials, app).listen(3000, function() {
console.log('Express HTTPS server listening on port 3000');
});
// redirect all http requests to https
app.use(function(req, res, next) {
if(!req.secure) {
return res.redirect(['https://mydomain.com', req.url].join(''));
}
next();
});
I want my user to be able to write my domain name using http and https with no port numbers. I already have a SSL certificate and everything is working fine, but I haven't been able remove the port-numbers and use both: https and http.
Any idea? please :)
I use MEAN stack (Mongo, Express, Angular, )
The only way to do that is to use the default ports for the protocols. That is, Port 80 for HTTP and Port 443 for HTTPS.
If you don't use the default protocol ports then the only way for the browser (or whatever client the users are using) to determine which port to connect to is for the user to specify it in the URL.
Edit - To address your comment above about different server objects
In the code in your question you create an HTTP server and then use the variable server to hold a reference to the object. You then create an HTTPS server and assign it to the same variable. If you use the server variable later in your code then you'll be dealing with the HTTPS server object, but will have no way to reference the HTTP server object.
To fix this, just use two different variables to hold the object references.
var httpServer = http.createServer ....
var httpsServer = https.createServer ....