48 lines
1.8 KiB
JavaScript
48 lines
1.8 KiB
JavaScript
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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" || plat == "freebsd") { 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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try { node.send(msg); }
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catch(e) {}
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});
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}, node.timer);
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this.on("close", function() {
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if (this.tout) { 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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