CODEWITHSUNDEEP
node.js
jim dif
jim dif

Reputation: 641

Changing Node.js listening port

I just installed node.js on Windows. I have this simple code which does not run:

I get: Error: listen EADDRINUSE

Is there a config file that tells node.js to listen on a specific port?

The problem is I have Apache listening on port 80 already.

EDIT:

var http = require('http'); 
var url = require('url'); 

http.createServer(function (req, res) { 
 console.log("Request: " + req.method + " to " + req.url); 
 res.writeHead(200, "OK"); 
 res.write("<h1>Hello</h1>Node.js is working"); 
 res.end(); 
}).listen(5454); 
console.log("Ready on port 5454");

Upvotes: 33

Views: 187644

Answers (4)

Thomas
Thomas

Reputation: 726

I would use an env variable...

let port = process.env.PORT ?? 9090
exp.listen(port, () => {
    console.log(`Serving... running on port ${port}`)
})

Run via CLI command:

PORT=9000 node index.js

This sets the default port to 9090, and if specified, uses the overridden value.

Upvotes: 0

maudulus
maudulus

Reputation: 11035

I usually manually set the port that I am listening on in the app.js file (assuming you are using express.js

var server = app.listen(8080, function() {
    console.log('Ready on port %d', server.address().port);
});

This will log Ready on port 8080 to your console.

Upvotes: 10

Gaurav Singh
Gaurav Singh

Reputation: 189

you can get the nodejs configuration from http://nodejs.org/
The important thing you need to keep in your mind is about its configuration in file app.js which consists of port number host and other settings these are settings working for me

backendSettings = {
"scheme":"https / http ",
"host":"Your website url",
"port":49165, //port number 
'sslKeyPath': 'Path for key',
'sslCertPath': 'path for SSL certificate',
'sslCAPath': '',
"resource":"/socket.io",
"baseAuthPath": '/nodejs/',
"publishUrl":"publish",
"serviceKey":"",
"backend":{
"port":443,
"scheme": 'https / http', //whatever is your website scheme
"host":"host name",
"messagePath":"/nodejs/message/"},
"clientsCanWriteToChannels":false,
"clientsCanWriteToClients":false,
"extensions":"",
"debug":false,
"addUserToChannelUrl": 'user/channel/add/:channel/:uid',
"publishMessageToContentChannelUrl": 'content/token/message',
"transports":["websocket",
"flashsocket",
"htmlfile",
"xhr-polling",
"jsonp-polling"],
"jsMinification":true,
"jsEtag":true,
"logLevel":1};

In this if you are getting "Error: listen EADDRINUSE" then please change the port number i.e, here I am using "49165" so you can use other port such as 49170 or some other port. For this you can refer to the following article
http://www.a2hosting.com/kb/installable-applications/manual-installations/installing-node-js-on-shared-hosting-accounts

Upvotes: 3

Mike Christensen
Mike Christensen

Reputation: 91608

There is no config file unless you create one yourself. However, the port is a parameter of the listen() function. For example, to listen on port 8124:

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(8124, "127.0.0.1");
console.log('Server running at http://127.0.0.1:8124/');

If you're having problems finding a port that's open, you can go to the command line and type:

netstat -ano

To see a list of all ports in use per adapter.

Upvotes: 32

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