NODE-PING

a ping wrapper for nodejs

@last-modified: 2016-04-24 00:00

LICENSE MIT

(C) Daniel Zelisko

http://github.com/danielzzz/node-ping

DESCRIPTION

node-ping is a simple wrapper for the system ping utility

INSTALLATION

npm install ping

USAGE

Below are examples extracted from examples

Tradition calls

var ping = require('ping');

var hosts = ['192.168.1.1', 'google.com', 'yahoo.com'];
hosts.forEach(function(host){
    ping.sys.probe(host, function(isAlive){
        var msg = isAlive ? 'host ' + host + ' is alive' : 'host ' + host + ' is dead';
        console.log(msg);
    });
});

Tradition calls with configuration

var cfg = {
    timeout: 10,
    // WARNING: -i 2 may not work in other platform like window
    extra: ["-i 2"],
};

hosts.forEach(function(host){
    ping.sys.probe(host, function(isAlive){
        var msg = isAlive ? 'host ' + host + ' is alive' : 'host ' + host + ' is dead';
        console.log(msg);
    }, cfg);
});

Promise wrapper

var ping = require('ping');

var hosts = ['192.168.1.1', 'google.com', 'yahoo.com'];

hosts.forEach(function (host) {
    ping.promise.probe(host)
        .then(function (res) {
            console.log(res);
        });
});

Promise Wrapper with configable ping options

hosts.forEach(function (host) {
    // WARNING: -i 2 argument may not work in other platform like window
    ping.promise.probe(host, {
        timeout: 10,
        extra: ["-i 2"],
    }).then(function (res) {
        console.log(res);
    });
});

Support configuration

Below is the possible configuration

/**
 * Cross platform config representation
 * @typedef {Object} PingConfig
 * @property {boolean} numeric - Map IP address to hostname or not
 * @property {number} timeout - Time duration for ping command to exit
 * @property {number} min_reply - Exit after sending number of ECHO_REQUEST
 * @property {string[]} extra - Optional options does not provided
 */

Output specification

• For callback based implementaiton:

/**
 * Callback after probing given host
 * @callback probeCallback
 * @param {boolean} isAlive - Whether target is alive or not
 * @param {Object} error - Null if no error occurs
 */

• For promise based implementation

/**
 * Resolved response
 * @param {string} host - The input IP address or HOST
 * @param {boolean} alive - True for existed host
 * @param {string} output - Raw stdout from system ping
 * @param {number} time - Time (float) in ms for first successful ping response
 */

{
    host: addr,
    alive: result,
    output: outstring,
    time: time,
}

Note

• Since ping in this module relies on the ping from underlying platform, arguments in PingConfig.extra will definitely be varied across different platforms.

• However, numeric, timeout and min_reply have been abstracted. Values for them are expected to be cross platform.

• By setting numeric, timeout or min_reply to false, you can run ping without corresponding arguments.