56 lines
2.0 KiB
JavaScript
56 lines
2.0 KiB
JavaScript
/**
|
|
* Copyright 2013 IBM Corp.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
**/
|
|
|
|
var RED = require(process.env.NODE_RED_HOME+"/red/red");
|
|
var spawn = require('child_process').spawn;
|
|
var plat = require('os').platform();
|
|
|
|
function PingNode(n) {
|
|
RED.nodes.createNode(this,n);
|
|
this.host = n.host;
|
|
this.timer = n.timer * 1000;
|
|
var node = this;
|
|
|
|
node.tout = setInterval(function() {
|
|
var ex;
|
|
if (plat == "linux") ex = spawn('ping', ['-n', '-w', '5', '-c', '1', node.host]);
|
|
else if (plat.match(/^win/)) ex = spawn('ping', ['-n', '1', '-w', '5000', node.host]);
|
|
else if (plat == "darwin") ex = spawn('ping', ['-n', '-t', '5', '-c', '1', node.host]);
|
|
else node.error("Sorry - your platform - "+plat+" - is not recognised.");
|
|
var res = false;
|
|
ex.stdout.on('data', function (data) {
|
|
//console.log('[ping] stdout: ' + data.toString());
|
|
var regex = /from.*time.(.*)ms/;
|
|
var m = regex.exec(data.toString())||"";
|
|
if (m != '') { res = Number(m[1]); }
|
|
});
|
|
ex.stderr.on('data', function (data) {
|
|
//console.log('[ping] stderr: ' + data);
|
|
});
|
|
ex.on('close', function (code) {
|
|
//console.log('[ping] result: ' + code);
|
|
var msg = { payload:false, topic:node.host };
|
|
if (code == 0) msg = { payload:res, topic:node.host };
|
|
node.send(msg);
|
|
});
|
|
}, node.timer);
|
|
|
|
this.on("close", function() {
|
|
clearInterval(this.tout);
|
|
});
|
|
}
|
|
RED.nodes.registerType("ping",PingNode);
|