uptime-kuma/server/ping-lite.js

119 lines
3.2 KiB
JavaScript

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