Connect to unix socket

[ralight]

Would you consider support for connecting to unix sockets? The use case is a local application wanting to connect to a local MQTT broker without having to create a network.

It looks like lib/connect/unix.js would be very similar to tcp.js, but with this sort of construct instead:

    unixpath = '/var/run/mqtt.socket'

    return net.createConnection(unixpath)

[mcollina]

Definitely! I have no bandwidth to work on this, but I’ll be happy to review a PR Il 6 feb 2020, 13:03 +0100, Roger Light <notifications@github.com>, ha scritto:

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Would you consider support for connecting to unix sockets? The use case is a local application wanting to connect to a local MQTT broker without having to create a network. It looks like lib/connect/unix.js would be very similar to tcp.js, but with this sort of construct instead: unixpath = '/var/run/mqtt.socket' return net.createConnection(unixpath) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[ralight]

Thanks, I'll take a look.

[natcl]

Any updates on this ? Would be interested in this feature too !

[ralight]

I hadn't done any more because of this: #1094 , but that has been closed now for some reason. It wasn't clear what to use as the URL prefix, otherwise I suspect it may have got further.

I've been using my own modified version just fine, I'd be happy for anyone to take this over.

[RuStrannik]

I suggest using unix:// prefix, which also used in nginx configs (those are really widespread and well known). Native mosquitto clients also use option --unix to specify path to unix socket.

I am really confused why it has not been accepted yet. This feature is clearly useful for security, doesn't break anything, and there is not that much to review! Literally 1 line of code and 1 file with 6 lines of really simple and straight-forward code added. Is project dead / in hibernation or what?

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[natcl]

We're still interested in this!

[nik-sie]

It's actually possible to connect to a unix socket right now.
Check this out:

'use strict';
const mqtt = require('mqtt');
const cfg = { path: "/run/mosquitto/mosquitto.sock", username: "user", password: "pass" };
const client = mqtt.connect(cfg);
client.on('error', (err) => { if (err) { console.error(err); }; });
client.on('connect', (conn_evt) => {
    console.log("mqtt: connected. Subscribing...");
    client.subscribe(['#'], { nl: true }, (err, granted) => { console.log("granted:", granted); });
});
client.on('message', (path, data, packet) => { console.log("mqtt_msg_in: ['%s']:(%d) '%s'", path, data.length, data.toString()); });

[robertsLando]

I dunno how that code could work @nik-sie, the PR adding unix socket support has never been merged. Maybe the default tcp handler could work as it support sockets too