I am using node.js to create an HTTP server, it is working fine but at the first time when any node application runs, a windows security firewall interrupts my application.I want that this security alert should not shown , i had checked many references but did not found my answer.
Here is my code :
var http = require('http');
var PORT = process.env.PORT || 3000;
http.createServer(function (req, res) {
console.log('%d request received', process.pid);
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello world!\n');
}).listen(PORT);
console.log('%d listening on %d', process.pid, PORT);
Allow access to that application through the Windows Firewall:
Go to: "Control Panel > System Ecurity > Windows Firewall > Advanced Settings".
Create new rule.
Select "Port" and press "Next".
Allow TCP and port your are attempting to expose (default 3000, you might want to expose 80), and press "Next".
Select "Allow the connection" and press "Next".
Check all: Domain, Private, Public and press "Next".
Source
I would also suggest you replace:
var PORT = process.env.PORT || 3000;
With:
var PORT = 3000;
Related
I'm fairly new to a lot of this stuff and am trying to figure it out.
I have a hosted domain at <my.domain.com>. I host a game at this address that users can go to that address and the game loads in the browser for them.
On the same server I am running an Express nodejs (we'll call this HTTP SERVER) server to receive HTTP requests.
Also on the same server I am running a socket server using the Socket.io (we'll call this SOCKET SERVER) library.
HTTP SERVER can connect to SOCKET SERVER via localhost:<port> and they can communicate back and forth. I can send requests from my mobile device to HTTP SERVER which forwards those request to SOCKET SERVER and get a response back on the mobile device.
My problem now is I need to create another connection to SOCKET SERVER from my hosted game at <my.domain.com>. However, when I attempt to connect to localhost:<port> like I do from HTTP SERVER I get an ERR_CONNECTION_REFUSED error. I am assuming this has to do with with the host name being different. I've attempted to add
app.use(function(req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
});
But that doesn't seem to help. I'm not really sure where to go from here.
Socket server app.js
const app = require('express')();
const server = require('http').Server(app);
const io = require('socket.io')(server);
app.use(function(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
});
server.listen(8082);
io.on('connection', (socket) => {
console.log(`Socket server 'connection' event`);
});
Code in HTTP SERVER that does properly connect and send/receive messages
var socket = require('socket.io-client')('http://localhost:8082');
socket.on('connect', () => {
console.log(`HTTP server - 'connect' event to socket server`);
});
This is a javascript file that the game loads as an add-on. Hooks is provided by the game as an EventEmitter. I do not have direct access to the HTML pages the game displays, though I can manipulate them via this javascript add-on file.
let socket;
// a game hook when it's initialized
Hooks.on("init", function() {
// don't have direct access to game pages, so create a script tag and load
// the socket.io client library
const scriptRef = document.createElement('script');
scriptRef.setAttribute('type', 'text/javascript');
scriptRef.setAttribute('onload', 'window.socketLibraryLoaded()');
scriptRef.setAttribute('src', 'https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js');
document.getElementsByTagName('head')[0].appendChild(scriptRef);
});
// handler for when library is loaded
window.socketLibraryLoaded = () => {
log('Socket library loaded');
// i assume this address is wrong since the host of the game is <my.domain.com> and it's trying to connect to localhost
socket = io('https://localhost:8082');
socket.on('connect', () => {
log('Connected to socket server');
});
socket.on('connect_error', error => {
log(error);
});
}
So after banging my head on the wall for more than 10 hours over this I finally found the issue. And of course a simple user error.
The CORs error wasn't really the problem. I was getting that error because the NGINX proxy was erroring which caused the proper headers not to get sent back so the browser showed that error.
The issue was that in one place in my NGINX configuration I was using 127.0.0.0 instead of 127.0.0.1
I am building a web scraper as a small project (using CodeIgniter). Due to CORS policy, I am not allowed to get data from some sites.
To bypass that, I am using Rob Wu's CORS Anywhere. I'm prepending the cors_url to the URL I'm scraping data off of.
Everything works fine until I hit the maximum allowed limit of 200 requests per hour. After hitting 200 times, I get an HTTP status code: 429 (Too many requests).
Screenshot showing Network log.
As per the documentation, we can create an instance of our own server.js on Heroku. But, what I want to do is, to set it up locally for my local Apache server (localhost), just to test out the things first.
Some sample code:
var url = "http://example.com/";
var cors_url = "https://cors-anywhere.herokuapp.com/";
$.ajax({
method:'GET',
url : cors_url + url,
success : function(response){
//data_scraping_logic...
}
}
Install the latest node
save the repo example code as cors.js (I'll paste it below)
do npm install cors-anywhere
run node cors - now it's running on localhost:8080
sample code
// Listen on a specific host via the HOST environment variable
var host = process.env.HOST || '0.0.0.0';
// Listen on a specific port via the PORT environment variable
var port = process.env.PORT || 8080;
var cors_proxy = require('cors-anywhere');
cors_proxy.createServer({
originWhitelist: [], // Allow all origins
// requireHeader: ['origin', 'x-requested-with'],
// removeHeaders: ['cookie', 'cookie2']
}).listen(port, host, function() {
console.log('Running CORS Anywhere on ' + host + ':' + port);
});
I have a series of serverless next.js apps running on AWS that I am serving at subdomains, and I want to proxy them to subdirectories on my main domain. So, for example, the app at foo.example.com/foo/ should appear at www.example.com/foo/.
I've accomplished this by using http-proxy and express. I have a fairly simple express server that runs in its own serverless app, like so:
const serverless = require('serverless-http');
const httpProxy = require('http-proxy');
const express = require('express');
const app = express();
const proxy = httpProxy.createProxyServer();
app.get('/', (req, res) => {
res.send('Hello, you are at index.');
});
app.get('/:project/*', (req, res) => {
const project = req.params.project;
const rest = req.params[0];
const url = `https://${project}.example.com/${project}/`;
req.url = `/${rest}`;
req.headers['X-Projects-Router-Proxy'] = true;
req.body = undefined;
proxy.web(req, res, {
target: url,
xfwd: false,
toProxy: true,
changeOrigin: true,
secure: true,
});
});
module.exports.handler = serverless(app);
This works quite well on its own, which is great. However, when I try to put this behind CloudFront, the index page works fine, but anything that touches the proxy returns a 403 error:
403 ERROR
The request could not be satisfied.
Bad request.
Generated by cloudfront (CloudFront)
What might be going wrong here, and how can I configure http-proxy so that it will cooperate with CloudFront?
You need to add *.example.com into CloudFront CNAME/Alternative name filed and also in DNS to point it to CloudFront, when url changes as {project}.example.com, CloudFront finds the distribution based on the host header and if it can't find, it'll give you 403 error.
I am running Charles to inspect HTTP traffic between a node js client and a service running locally on my machine (a Mac). I am able to access the service but don't see any trace in Charles. I have tried replacing localhost with my machine's IP name but still no trace. If I type the service URL in Chrome I do see a trace. Anyone knows how to fix this?
Here is my nodejs code:
var thrift = require('thrift'); // I use Apache Thrift
var myService = require('./gen-nodejs/MyService'); // this is code generated by thrift compiler
var transport = thrift.TBufferedTransport();
var protocol = thrift.TBinaryProtocol();
var connection = thrift.createHttpConnection("localhost", 5331, {
transport : transport,
protocol : protocol,
path: '/myhandler',
});
connection.on('error', function(err) {
console.log(err);
});
// Create a client with the connection
var client = thrift.createHttpClient(myService, connection);
console.log('calling getTotalJobCount...');
client.getTotalJobCount(function(count)
{
console.log('total job count = ' + count);
});
and my proxy settings:
fixed this myself with help of this link. Charles intercepts the traffic crossing the system proxy which is 127.0.0.1:8888 on my mac. Here is proper code:
// give path to the proxy in argument to createHttpConnection
var connection = thrift.createHttpConnection('127.0.0.1', 8888, {
transport : transport,
protocol : protocol,
path: 'http://localhost:5331/myhandler', // give the actual URL you want to connect to here
});
In addition need to use thrift.TBufferedTransport instead of thrift.TBufferedTransport() and thrift.TBinaryProtocol instead of thrift.TBinaryProtocol()
I did install all needed package and node.js to dedicated machine Windows 2008 Server.
var http = require('http');
var port = 1337;
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(port, '127.0.0.1');
console.log('Server running at http://127.0.0.1:' + port );
So when I call
http://local.host:1337/,
I get 'Hello World'
But if try to call this service from another machine:
http://my.domain.ip.address:1337/ Ooops, I can't see nothing.
I already switch Off firewall at all
Thanks, to All advices
Listening to localhost or 127.0.0.1 only allows for responding to requests made from the same computer to that specific IP or hostname.
To have your application respond to requests for multiple IP addresses, you'll need to listen to each of them. You can either do this individually.
function server(req, res) {
// ...
}
http.createServer(server).listen(port, '127.0.0.1');
http.createServer(server).listen(port, 'my.domain.ip.address');
http.createServer(server).listen(port, '<any other public facing IP address>');
Or, you can listen to IPADDR_ANY (0.0.0.0), which in a non-specific, meta address. And, this is the default value for the hostname argument, so you only need to specify the port.
http.createServer(function (req, res) {
// ...
}).listen(port);