Can node.js listen on UNIX socket?

Question

Can node.js listen on UNIX socket? I did not find any documentation regarding this. I only saw the possibility of listening on a dedicated port.

Answer 1

To listen for incoming connections in node.js you want to use the net.server class.

The standard way of creating an instance of this class is with the net.createServer(...) function. Once you have an instance of this class you use the server.listen(...) function to tell the server where to actually listen.

If the first argument to listen is a number then nodejs will listen on a TCP/IP socket with that port number. However, if the first argument to listen is a string, then the server object will listen on a Unix socket at that path.

var net = require('net');  // This server listens on a Unix socket at /var/run/mysocket var unixServer = net.createServer(function(client) {     // Do something with the client connection }); unixServer.listen('/var/run/mysocket');  // This server listens on TCP/IP port 1234 var tcpServer = net.createServer(function(client) {     // Do something with the client connection }); tcpServer.listen(1234); 

Answer 2

Yes. It's in the documentation.

https://nodejs.org/api/net.html#net_server_listen_path_backlog_callback