CODEWITHSUNDEEP
node.jspipenamed-pipes
wako
wako

Reputation: 815

How to create a named pipe in node.js?

How to create a named pipe in node.js?

P.S.: For now I'm creating a named pipe as follows. But I think this is not best way

var mkfifoProcess = spawn('mkfifo',  [fifoFilePath]);
mkfifoProcess.on('exit', function (code) {
    if (code == 0) {
        console.log('fifo created: ' + fifoFilePath);
    } else {
        console.log('fail to create fifo with code:  ' + code);
    }
});

Upvotes: 39

Views: 45002

Answers (3)

befzz
befzz

Reputation: 1292

Working with named pipes on Windows

Node v0.12.4

var net = require('net');

var PIPE_NAME = "mypipe";
var PIPE_PATH = "\\\\.\\pipe\\" + PIPE_NAME;

var L = console.log;

var server = net.createServer(function(stream) {
    L('Server: on connection')

    stream.on('data', function(c) {
        L('Server: on data:', c.toString());
    });

    stream.on('end', function() {
        L('Server: on end')
        server.close();
    });

    stream.write('Take it easy!');
});

server.on('close',function(){
    L('Server: on close');
})

server.listen(PIPE_PATH,function(){
    L('Server: on listening');
})

// == Client part == //
var client = net.connect(PIPE_PATH, function() {
    L('Client: on connection');
})

client.on('data', function(data) {
    L('Client: on data:', data.toString());
    client.end('Thanks!');
});

client.on('end', function() {
    L('Client: on end');
})

Output:

Server: on listening
Client: on connection
Server: on connection
Client: on data: Take it easy!
Server: on data: Thanks!
Client: on end
Server: on end
Server: on close

Note about pipe names:

C/C++ / Nodejs:
\\.\pipe\PIPENAME CreateNamedPipe

.Net / Powershell:
\\.\PIPENAME NamedPipeClientStream / NamedPipeServerStream

Both will use file handle:
\Device\NamedPipe\PIPENAME

Upvotes: 43

jpillora
jpillora

Reputation: 5262

Looks like name pipes aren't and won't be supported in Node core - from Ben Noordhuis 10/11/11:

Windows has a concept of named pipes but since you mention mkfifo I assume you mean UNIX FIFOs.

We don't support them and probably never will (FIFOs in non-blocking mode have the potential to deadlock the event loop) but you can use UNIX sockets if you need similar functionality.

https://groups.google.com/d/msg/nodejs/9TvDwCWaB5c/udQPigFvmgAJ

Named pipes and sockets are very similar however, the net module implements local sockets by specifying a path as opposed to a host and port:

Example:

var net = require('net');

var server = net.createServer(function(stream) {
  stream.on('data', function(c) {
    console.log('data:', c.toString());
  });
  stream.on('end', function() {
    server.close();
  });
});

server.listen('/tmp/test.sock');

var stream = net.connect('/tmp/test.sock');
stream.write('hello');
stream.end();

Upvotes: 34

Vodun
Vodun

Reputation: 1385

Maybe use fs.watchFile instead of named pipe ? See documentation

Upvotes: -1

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