119 lines
3.2 KiB
JavaScript
119 lines
3.2 KiB
JavaScript
// https://github.com/ben-bradley/ping-lite/blob/master/ping-lite.js
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// Fixed on Windows
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var spawn = require('child_process').spawn,
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events = require('events'),
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fs = require('fs'),
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WIN = /^win/.test(process.platform),
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LIN = /^linux/.test(process.platform),
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MAC = /^darwin/.test(process.platform);
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module.exports = Ping;
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function Ping(host, options) {
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if (!host)
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throw new Error('You must specify a host to ping!');
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this._host = host;
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this._options = options = (options || {});
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events.EventEmitter.call(this);
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if (WIN) {
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this._bin = 'c:/windows/system32/ping.exe';
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this._args = (options.args) ? options.args : [ '-n', '1', '-w', '5000', host ];
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this._regmatch = /[><=]([0-9.]+?)ms/;
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}
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else if (LIN) {
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this._bin = '/bin/ping';
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this._args = (options.args) ? options.args : [ '-n', '-w', '2', '-c', '1', host ];
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this._regmatch = /=([0-9.]+?) ms/; // need to verify this
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}
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else if (MAC) {
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this._bin = '/sbin/ping';
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this._args = (options.args) ? options.args : [ '-n', '-t', '2', '-c', '1', host ];
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this._regmatch = /=([0-9.]+?) ms/;
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}
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else {
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throw new Error('Could not detect your ping binary.');
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}
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if (!fs.existsSync(this._bin))
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throw new Error('Could not detect '+this._bin+' on your system');
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this._i = 0;
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return this;
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}
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Ping.prototype.__proto__ = events.EventEmitter.prototype;
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// SEND A PING
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// ===========
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Ping.prototype.send = function(callback) {
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var self = this;
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callback = callback || function(err, ms) {
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if (err) return self.emit('error', err);
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else return self.emit('result', ms);
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};
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var _ended, _exited, _errored;
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this._ping = spawn(this._bin, this._args); // spawn the binary
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this._ping.on('error', function(err) { // handle binary errors
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_errored = true;
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callback(err);
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});
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this._ping.stdout.on('data', function(data) { // log stdout
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this._stdout = (this._stdout || '') + data;
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});
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this._ping.stdout.on('end', function() {
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_ended = true;
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if (_exited && !_errored) onEnd.call(self._ping);
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});
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this._ping.stderr.on('data', function(data) { // log stderr
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this._stderr = (this._stderr || '') + data;
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});
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this._ping.on('exit', function(code) { // handle complete
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_exited = true;
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if (_ended && !_errored) onEnd.call(self._ping);
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});
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function onEnd() {
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var stdout = this.stdout._stdout,
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stderr = this.stderr._stderr,
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ms;
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if (stderr)
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return callback(new Error(stderr));
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else if (!stdout)
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return callback(new Error('No stdout detected'));
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ms = stdout.match(self._regmatch); // parse out the ##ms response
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ms = (ms && ms[1]) ? Number(ms[1]) : ms;
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callback(null, ms);
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}
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};
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// CALL Ping#send(callback) ON A TIMER
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// ===================================
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Ping.prototype.start = function(callback) {
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var self = this;
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this._i = setInterval(function() {
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self.send(callback);
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}, (self._options.interval || 5000));
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self.send(callback);
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};
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// STOP SENDING PINGS
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// ==================
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Ping.prototype.stop = function() {
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clearInterval(this._i);
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};
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