58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
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/**
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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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var RED = require("../../red/red");
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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="";
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ex.stdout.on('data', function (data) {
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//console.log('[ping] stdout: ' + data.toString());
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var regex = /time=(.*)ms/;
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var m = regex.exec(data.toString())||[""];
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res = Number(m[1]);
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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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//console.log('[ping] result: ' + code);
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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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}
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RED.nodes.registerType("ping",PingNode);
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PingNode.prototype.close = function() {
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clearInterval(this.tout);
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}
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