62 lines
2.3 KiB
JavaScript
62 lines
2.3 KiB
JavaScript
/**
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* Copyright 2013 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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var spawn = require('child_process').spawn;
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var plat = require('os').platform();
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function PingNode(n) {
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RED.nodes.createNode(this,n);
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this.host = n.host;
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this.timer = n.timer * 1000;
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var node = this;
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node.tout = setInterval(function() {
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var ex;
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if (plat == "linux") { ex = spawn('ping', ['-n', '-w', '5', '-c', '1', node.host]); }
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else if (plat.match(/^win/)) { ex = spawn('ping', ['-n', '1', '-w', '5000', node.host]); }
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else if (plat == "darwin") { ex = spawn('ping', ['-n', '-t', '5', '-c', '1', node.host]); }
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else { node.error("Sorry - your platform - "+plat+" - is not recognised."); }
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var res = false;
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var line = "";
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//var regex = /from.*time.(.*)ms/;
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var regex = /=.*[<|=]([0-9]*).*TTL|ttl..*=([0-9\.]*)/;
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ex.stdout.on('data', function (data) {
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line += data.toString();
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});
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//ex.stderr.on('data', function (data) {
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//console.log('[ping] stderr: ' + data);
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//});
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ex.on('close', function (code) {
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var m = regex.exec(line)||"";
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if (m !== '') {
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if (m[1]) { res = Number(m[1]); }
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if (m[2]) { res = Number(m[2]); }
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}
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var msg = { payload:false, topic:node.host };
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if (code === 0) { msg = { payload:res, topic:node.host }; }
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node.send(msg);
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});
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}, node.timer);
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this.on("close", function() {
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clearInterval(this.tout);
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});
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}
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RED.nodes.registerType("ping",PingNode);
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}
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