npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

portscanner-sync

v1.0.1

Published

A synchronous port scanner for Node.js

Downloads

9

Readme

portscanner-sync

Build Status

The portscanner module is a synchronous port scanner for Node.js

Portscanner can check a port, or range of ports, for 'open' or 'closed' statuses.

Install

npm install portscanner-sync

Usage

A brief example:


const portScanner = require('portscanner-sync');
const to = require('await-to-js').to;

let main = async () => {
    let [err, care] = [];
    let status;
    let port;
    
    // Checks the status of an individual port.
    [err, care] = await to(portScanner.checkPortStatus(3005, '127.0.0.1'));
    status = care;
    if (err) {
        console.error(err)
    } else {
        console.log('Status at port 3005 is ' + status)
    }
    [err, care] = await to(portScanner.checkPortStatus(2999, '127.0.0.1'));
    status = care;
    if (err) {
        console.error(err)
    } else {
        console.log('Status at port 2999 is ' + status)
    }
    [err, care] = await to(portScanner.checkPortStatus(3000, '127.0.0.1'));
    status = care;
    if (err) {
        console.error(err)
    } else {
        console.log('Status at port 3000 is ' + status)
    }
    [err, care] = await to(portScanner.checkPortStatus(3001, '127.0.0.1'));
    status = care;
    if (err) {
        console.error(err)
    } else {
        console.log('Status at port 3001 is ' + status)
    }

    // Finds a port that a service is listening on
    [err, care] = await to(portScanner.findAPortInUse(2900, 3010, '127.0.0.1'));
    port = care
    if (err) {
        console.error(err)
    } else {
        console.log('Found an open port at ' + port)
    }

    [err, care] = await to(portScanner.findAPortNotInUse([80,3000, 3010], '127.0.0.1'));
    port = care
    if (err) {
        console.error(err)
    } else {
        console.log('Found a closed port at ' + port)
    }
}

main()

The example directory contains a more detailed example.

Test

npm test

API

Refer to the documentation

Modules

Functions

portscanner

checkPortStatus(port, [host], timeout) ⇒ Array.<string>

Kind: global function
Returns: Array.<string> - - [err, success]. success is either of closed/open. Closed if port is not in use, open otherwise

| Param | Type | Default | Description | | --- | --- | --- | --- | | port | Number | | Port to check status on. | | [host] | String | '127.0.0.1' | Host of where to scan. | | timeout | Number | 400 | timeout. |

findAPortInUse(postList, [host]) ⇒ Array.<string>

Kind: global function
Returns: Array.<string> - - [error, port]

| Param | Type | Default | Description | | --- | --- | --- | --- | | postList | Array | | Array of ports to check status on. | | [host] | String | '127.0.0.1' | Host of where to scan. |

Example

// scans 3000 and 3002 only, not 3001.
portscanner.findAPortInUse([3000, 3002], console.log)

findAPortNotInUse()

Finds the first port with a status of 'closed', implying the port is not in use. Accepts identical parameters as findAPortInUse

Kind: global function

findAPortWithStatus(...params)

Kind: global function

| Param | Type | Description | | --- | --- | --- | | ...params | params | Params as passed exactly to findAPortInUse and findAPortNotInUse. |

Developed by CSECO

CSECO is a mechatronics firm specializing in engineering technology to be cheap enough to be affordable to low income earners.

http://www.cseco.co.ke