52 lines
1.7 KiB
JavaScript
52 lines
1.7 KiB
JavaScript
/**
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* Copyright 2015 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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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 browser = mdns.createBrowser(this.service);
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var node = this;
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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.start();
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node.on("close", function () {
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browser.stop();
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});
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}
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RED.nodes.registerType("discovery", MdnsNode);
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}
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