104 lines
3.4 KiB
JavaScript
104 lines
3.4 KiB
JavaScript
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module.exports = function(RED) {
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"use strict";
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function MdnsNode(n) {
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var mdns = require('mdns');
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if (process.platform === "linux") {
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RED.log.info("You may ignore the warning about Bonjour compatability.");
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}
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RED.nodes.createNode(this, n);
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this.topic = n.topic || "";
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this.service = n.service;
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var node = this;
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// var sequence = [
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// mdns.rst.DNSServiceResolve(),
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// mdns.rst.getaddrinfo({families: [4] })
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// ];
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// var browser = mdns.createBrowser(this.service,{resolverSequence: sequence});
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var sequence = [
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mdns.rst.DNSServiceResolve(),
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'DNSServiceGetAddrInfo' in mdns.dns_sd ? mdns.rst.DNSServiceGetAddrInfo() : mdns.rst.getaddrinfo({families:[4]}),
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mdns.rst.makeAddressesUnique()
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];
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var browser = mdns.createBrowser((this.service), {resolverSequence:sequence});
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browser.on('serviceUp', function(service) {
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if (RED.settings.verbose) { node.log("here : " + service.name); }
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service.state = true;
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var msg = {topic:node.topic, payload:service};
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node.send(msg);
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});
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browser.on('serviceDown', function(service) {
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if (RED.settings.verbose) { node.log("away : " + service.name); }
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service.state = false;
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var msg = {topic:node.topic, payload:service};
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node.send(msg);
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});
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browser.on('error', function(exception) {
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node.error(exception.toString());
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});
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browser.start();
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node.on("close", function() {
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if (browser) { browser.stop(); }
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});
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}
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RED.nodes.registerType("discovery", MdnsNode);
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function MdnsAnnNode(n) {
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var mdns = require('mdns');
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var os = require("os");
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if (process.platform === "linux") {
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RED.log.info("You may ignore the warning about Bonjour compatability.");
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}
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RED.nodes.createNode(this, n);
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this.service = n.service || "";
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this.port = n.port;
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this.name = n.name;
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this.txt = n.txt;
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if (this.txt && (this.txt !== '')) {
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try { this.txt = JSON.parse('{'+this.txt+'}'); }
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catch (e) { delete this.txt; }
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}
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var node = this;
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this.on("input", function(msg) {
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if (msg.payload == false) {
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this.stop();
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}
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else {
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var service = node.service || msg.service;
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var port = Number(node.port || msg.port);
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var options = {};
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if (node.name || msg.name) {
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options.name = (node.name || msg.name).replace(/\%h/g, os.hostname());
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}
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if (node.txt || msg.txtRecord) { options.txtRecord = node.txt || msg.txtRecord }
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this.stop();
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node.ad = mdns.createAdvertisement(service, port, options);
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node.ad.start();
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node.status({fill: "green", shape: "dot"});
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}
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});
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this.on("error", function(e) {
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node.error(e);
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});
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this.on("close", function() {
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this.stop();
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});
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this.stop = function() {
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if (node.ad) {
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node.ad.stop();
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node.status({fill: "red", shape: "ring"});
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}
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}
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}
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RED.nodes.registerType("announce", MdnsAnnNode);
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}
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