110 lines
3.1 KiB
JavaScript
110 lines
3.1 KiB
JavaScript
'use strict';
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// ==================================================================================
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// index.js
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// ----------------------------------------------------------------------------------
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// Description: System Information - library
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// for Node.js
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// Copyright: (c) 2014 - 2016
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// Author: Sebastian Hildebrandt
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// ----------------------------------------------------------------------------------
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// License: MIT
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// ==================================================================================
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// 12. Internet
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// ----------------------------------------------------------------------------------
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const os = require('os');
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const exec = require('child_process').exec;
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const util = require('./util');
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let _platform = os.type();
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const _linux = (_platform == 'Linux');
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const _darwin = (_platform == 'Darwin');
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const _windows = (_platform == 'Windows_NT');
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const NOT_SUPPORTED = 'not supported';
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// --------------------------
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// check if external site is available
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function inetChecksite(url, callback) {
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return new Promise((resolve, reject) => {
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process.nextTick(() => {
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if (_windows) {
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let error = new Error(NOT_SUPPORTED);
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if (callback) { callback(NOT_SUPPORTED) }
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reject(error);
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}
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let result = {
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url: url,
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ok: false,
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status: 404,
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ms: -1
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};
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if (url) {
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let t = Date.now();
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let args = " -I --connect-timeout 5 -m 5 " + url + " 2>/dev/null | head -n 1 | cut -d ' ' -f2";
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let cmd = "curl";
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exec(cmd + args, function (error, stdout) {
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let statusCode = parseInt(stdout.toString());
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result.status = statusCode || 404;
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result.ok = !error && (statusCode == 200 || statusCode == 301 || statusCode == 302 || statusCode == 304);
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result.ms = (result.ok ? Date.now() - t : -1);
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if (callback) { callback(result) }
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resolve(result);
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})
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} else {
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if (callback) { callback(result) }
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resolve(result);
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}
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});
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});
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}
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exports.inetChecksite = inetChecksite;
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// --------------------------
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// check inet latency
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function inetLatency(host, callback) {
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// fallback - if only callback is given
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if (util.isFunction(host) && !callback) {
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callback = host;
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host = '';
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}
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host = host || '8.8.8.8';
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return new Promise((resolve, reject) => {
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process.nextTick(() => {
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if (_windows) {
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let error = new Error(NOT_SUPPORTED);
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if (callback) { callback(NOT_SUPPORTED) }
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reject(error);
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}
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let t = Date.now();
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let cmd;
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if (_linux) {
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cmd = "ping -c 2 -w 3 " + host + " | grep rtt | cut -d'/' -f4 | awk '{ print $3 }'";
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}
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if (_darwin) {
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cmd = "ping -c 2 -t 3 " + host + " | grep avg | cut -d'/' -f4 | awk '{ print $3 }'";
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}
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exec(cmd, function (error, stdout) {
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let result = -1;
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if (!error) {
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result = parseFloat(stdout.toString());
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}
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if (callback) { callback(result) }
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resolve(result);
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})
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});
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});
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}
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exports.inetLatency = inetLatency;
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