Sheldon  Grant

Sheldon Grant

1662811500

7 Favorite Node.js IP Geolocation API Libraries

In today's post we will learn about 7 Favorite Node.js IP Geolocation API Libraries. 

Geolocation has to be one of the most underrated yet rewarding innovations for the modern generation. Words cannot describe the impact it has had on our day-to-day personal and professional lives. From tracking lost devices to finding restaurants nearby to dine at, Geolocation has become an integral part of our daily lives.

Geolocation can be simply defined as the process by which the geographic location of a radar source, mobile network, or internet-connected devices can be identified. An IP Geolocation API is a technology that can identify the real-world location of a device connected to the internet.

1 - Node-geoip

Native NodeJS implementation of MaxMind's GeoIP API -- works in node 0.6.3 and above, ask me about other versions

why geoip-lite

geoip-lite is a fully JavaScript implementation of the MaxMind geoip API. It is not as fully featured as bindings that use libgeoip. By reducing scope, this package is about 40% faster at doing lookups. On average, an IP to Location lookup should take 20 microseconds on a Macbook Pro. IPv4 addresses take about 6 microseconds, while IPv6 addresses take about 30 microseconds.

synopsis

var geoip = require('geoip-lite');

var ip = "207.97.227.239";
var geo = geoip.lookup(ip);

console.log(geo);
{ range: [ 3479298048, 3479300095 ],
  country: 'US',
  region: 'TX',
  eu: '0',
  timezone: 'America/Chicago',
  city: 'San Antonio',
  ll: [ 29.4969, -98.4032 ],
  metro: 641,
  area: 1000 }

installation

1. get the library

$ npm install geoip-lite

2. update the datafiles (optional)

Run cd node_modules/geoip-lite && npm run-script updatedb license_key=YOUR_LICENSE_KEY to update the data files. (Replace YOUR_LICENSE_KEY with your license key obtained from maxmind.com)

You can create maxmind account here

NOTE that this requires a lot of RAM. It is known to fail on on a Digital Ocean or AWS micro instance. There are no plans to change this. geoip-lite stores all data in RAM in order to be fast.

View on Github

2 - ipapi-nodejs

Node.js + ipapi (IP address location API)

Installation

npm install ipapi.co

Usage

From Node.js REPL

var ipapi = require('ipapi.co');

var callback = function(res){
    console.log(res);
};

ipapi.location(callback)       // Complete location for your IP address
> { 
    ip: '50.1.2.3',
    city: 'Wilton',
    region: 'California',
    country: 'US',
    postal: 95693,
    latitude: 38.3926,
    longitude: -121.2429,
    timezone: 'America/Los_Angeles' 
  }


ipapi.location(callback, '', '', 'ip')         // Your external IP address
50.1.2.3

ipapi.location(callback, '', '', 'city')       // Your city
Wilton

ipapi.location(callback, '', '', 'country')    // Your country
US

ipapi.location(callback, '8.8.8.8')            // Complete location for IP address 8.8.8.8
> { 
    ip: '8.8.8.8',
    city: 'Mountain View',
    region: 'California',
    country: 'US',
    postal: '94035',
    latitude: 37.386,
    longitude: -122.0838,
    timezone: 'America/Los_Angeles' 
}

ipapi.location(callback, '8.8.8.8', '', 'city')       // City for IP address 8.8.8.8
Mountain View

ipapi.location(callback, '8.8.8.8', '', 'country')       // Country for IP address 8.8.8.8
US

View on Github

3 - Nodejs-geoip2ws

Maxmind GeoIP2 Web Services for Node.js

Usage

You can provide the configuration in the require function or inline at lookup time. The lookup always returns a Promise.

Normal configuration

const geo = require ('geoip2ws') ({
  userId: '12345',
  licenseKey: 'abc678',
});

geo ({
  service: 'city',
  ip: '1.2.3.4',
})
  .then (console.log)
  .catch (console.error)
;

Inline configuration

const geo = require ('geoip2ws')();

geo ({
  userId: '12345',
  licenseKey: 'abc678',
  service: 'city',
  ip: '1.2.3.4',
})
  .then (console.log)
  .catch (console.error)
;

Installation

You need a Maxmind account ID and license key with enough credits for one of their GeoIP web services. You can find both here.

npm i geoip2ws

View on Github

4 - Request-ip

A Node.js module for retrieving a request's IP address on the server.

Installation

Yarn

yarn add request-ip

npm

npm install request-ip --save

Getting Started

const requestIp = require('request-ip');

// inside middleware handler
const ipMiddleware = function(req, res, next) {
    const clientIp = requestIp.getClientIp(req); 
    next();
};

// on localhost you'll see 127.0.0.1 if you're using IPv4 
// or ::1, ::ffff:127.0.0.1 if you're using IPv6

As Connect Middleware

const requestIp = require('request-ip');
app.use(requestIp.mw())

app.use(function(req, res) {
    const ip = req.clientIp;
    res.end(ip);
});

View on Github

5 - Node-iplocate

Find geolocation data from IP addresses (e.g. city, country, timezone) using the IPLocate.io API

Installation

npm install node-iplocate

Usage Example

const iplocate = require("node-iplocate");

iplocate("8.8.8.8").then(function(results) {
  console.log("IP Address: " + results.ip);
  console.log("Country: " + results.country + " (" + results.country_code + ")");
  console.log("Continent: " + results.continent);
  console.log("Organisation: " + results.org + " (" + results.asn + ")");

  console.log(JSON.stringify(results, null, 2));
});

// Or with callbacks
iplocate("8.8.8.8", null, function(err, results) {
  // ...
  console.log(JSON.stringify(results, null, 2));
});

// Provide an API key from IPLocate.io
iplocate("8.8.8.8", { api_key: "abcdef" }).then(function(results) {
  // ...
});

IP Address: 8.8.8.8
Country: United States (US)
Continent: North America
Organisation: Google LLC (AS15169)

{
  "ip": "8.8.8.8",
  "country": "United States",
  "country_code": "US",
  "city": null,
  "continent": "North America",
  "latitude": 37.751,
  "longitude": -97.822,
  "time_zone": null,
  "postal_code": null,
  "org": "Google LLC",
  "asn": "AS15169"
}

View on Github

6 - Express-ipfilter

A light-weight IP address based connection filtering system

Installation

Recommended installation is with npm. To add express-ipfilter to your project, do:

npm install express-ipfilter

Usage with Express

Denying certain IP addresses, while allowing all other IPs:

// Init dependencies
const express = require('express')
const ipfilter = require('express-ipfilter').IpFilter

// Deny the following IPs
const ips = ['127.0.0.1']

// Create the server
app.use(ipfilter(ips))
app.listen(3000)

Allowing certain IP addresses, while denying all other IPs:

// Init dependencies
// Init dependencies
const express = require('express')
const ipfilter = require('express-ipfilter').IpFilter

// Allow the following IPs
const ips = ['127.0.0.1']

// Create the server
app.use(ipfilter(ips, { mode: 'allow' }))

module.exports = app

View on Github

7 - Nodejs-geolocation

Google Maps Geolocation API for Node.js (unofficial)

Example

const geo = require ('google-geolocation');

function out (obj) {
  console.dir (obj, {
    depth: null,
    colors: true,
  });
}

// Get data
geo ({
  key: 'abc123',
  wifiAccessPoints: [{
    macAddress: '01:23:45:67:89:AB',
    signalStrength: -65,
    signalToNoiseRatio: 40,
  }],
})
  .then (out)
  .catch (err => {
    out (err);
    process.exit (1);
  })
;

Installation

npm i google-geolocation

View on Github

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Related videos:

API-Review of an IP Geolocation API

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7 Favorite Node.js IP Geolocation API Libraries

NBB: Ad-hoc CLJS Scripting on Node.js

Nbb

Not babashka. Node.js babashka!?

Ad-hoc CLJS scripting on Node.js.

Status

Experimental. Please report issues here.

Goals and features

Nbb's main goal is to make it easy to get started with ad hoc CLJS scripting on Node.js.

Additional goals and features are:

  • Fast startup without relying on a custom version of Node.js.
  • Small artifact (current size is around 1.2MB).
  • First class macros.
  • Support building small TUI apps using Reagent.
  • Complement babashka with libraries from the Node.js ecosystem.

Requirements

Nbb requires Node.js v12 or newer.

How does this tool work?

CLJS code is evaluated through SCI, the same interpreter that powers babashka. Because SCI works with advanced compilation, the bundle size, especially when combined with other dependencies, is smaller than what you get with self-hosted CLJS. That makes startup faster. The trade-off is that execution is less performant and that only a subset of CLJS is available (e.g. no deftype, yet).

Usage

Install nbb from NPM:

$ npm install nbb -g

Omit -g for a local install.

Try out an expression:

$ nbb -e '(+ 1 2 3)'
6

And then install some other NPM libraries to use in the script. E.g.:

$ npm install csv-parse shelljs zx

Create a script which uses the NPM libraries:

(ns script
  (:require ["csv-parse/lib/sync$default" :as csv-parse]
            ["fs" :as fs]
            ["path" :as path]
            ["shelljs$default" :as sh]
            ["term-size$default" :as term-size]
            ["zx$default" :as zx]
            ["zx$fs" :as zxfs]
            [nbb.core :refer [*file*]]))

(prn (path/resolve "."))

(prn (term-size))

(println (count (str (fs/readFileSync *file*))))

(prn (sh/ls "."))

(prn (csv-parse "foo,bar"))

(prn (zxfs/existsSync *file*))

(zx/$ #js ["ls"])

Call the script:

$ nbb script.cljs
"/private/tmp/test-script"
#js {:columns 216, :rows 47}
510
#js ["node_modules" "package-lock.json" "package.json" "script.cljs"]
#js [#js ["foo" "bar"]]
true
$ ls
node_modules
package-lock.json
package.json
script.cljs

Macros

Nbb has first class support for macros: you can define them right inside your .cljs file, like you are used to from JVM Clojure. Consider the plet macro to make working with promises more palatable:

(defmacro plet
  [bindings & body]
  (let [binding-pairs (reverse (partition 2 bindings))
        body (cons 'do body)]
    (reduce (fn [body [sym expr]]
              (let [expr (list '.resolve 'js/Promise expr)]
                (list '.then expr (list 'clojure.core/fn (vector sym)
                                        body))))
            body
            binding-pairs)))

Using this macro we can look async code more like sync code. Consider this puppeteer example:

(-> (.launch puppeteer)
      (.then (fn [browser]
               (-> (.newPage browser)
                   (.then (fn [page]
                            (-> (.goto page "https://clojure.org")
                                (.then #(.screenshot page #js{:path "screenshot.png"}))
                                (.catch #(js/console.log %))
                                (.then #(.close browser)))))))))

Using plet this becomes:

(plet [browser (.launch puppeteer)
       page (.newPage browser)
       _ (.goto page "https://clojure.org")
       _ (-> (.screenshot page #js{:path "screenshot.png"})
             (.catch #(js/console.log %)))]
      (.close browser))

See the puppeteer example for the full code.

Since v0.0.36, nbb includes promesa which is a library to deal with promises. The above plet macro is similar to promesa.core/let.

Startup time

$ time nbb -e '(+ 1 2 3)'
6
nbb -e '(+ 1 2 3)'   0.17s  user 0.02s system 109% cpu 0.168 total

The baseline startup time for a script is about 170ms seconds on my laptop. When invoked via npx this adds another 300ms or so, so for faster startup, either use a globally installed nbb or use $(npm bin)/nbb script.cljs to bypass npx.

Dependencies

NPM dependencies

Nbb does not depend on any NPM dependencies. All NPM libraries loaded by a script are resolved relative to that script. When using the Reagent module, React is resolved in the same way as any other NPM library.

Classpath

To load .cljs files from local paths or dependencies, you can use the --classpath argument. The current dir is added to the classpath automatically. So if there is a file foo/bar.cljs relative to your current dir, then you can load it via (:require [foo.bar :as fb]). Note that nbb uses the same naming conventions for namespaces and directories as other Clojure tools: foo-bar in the namespace name becomes foo_bar in the directory name.

To load dependencies from the Clojure ecosystem, you can use the Clojure CLI or babashka to download them and produce a classpath:

$ classpath="$(clojure -A:nbb -Spath -Sdeps '{:aliases {:nbb {:replace-deps {com.github.seancorfield/honeysql {:git/tag "v2.0.0-rc5" :git/sha "01c3a55"}}}}}')"

and then feed it to the --classpath argument:

$ nbb --classpath "$classpath" -e "(require '[honey.sql :as sql]) (sql/format {:select :foo :from :bar :where [:= :baz 2]})"
["SELECT foo FROM bar WHERE baz = ?" 2]

Currently nbb only reads from directories, not jar files, so you are encouraged to use git libs. Support for .jar files will be added later.

Current file

The name of the file that is currently being executed is available via nbb.core/*file* or on the metadata of vars:

(ns foo
  (:require [nbb.core :refer [*file*]]))

(prn *file*) ;; "/private/tmp/foo.cljs"

(defn f [])
(prn (:file (meta #'f))) ;; "/private/tmp/foo.cljs"

Reagent

Nbb includes reagent.core which will be lazily loaded when required. You can use this together with ink to create a TUI application:

$ npm install ink

ink-demo.cljs:

(ns ink-demo
  (:require ["ink" :refer [render Text]]
            [reagent.core :as r]))

(defonce state (r/atom 0))

(doseq [n (range 1 11)]
  (js/setTimeout #(swap! state inc) (* n 500)))

(defn hello []
  [:> Text {:color "green"} "Hello, world! " @state])

(render (r/as-element [hello]))

Promesa

Working with callbacks and promises can become tedious. Since nbb v0.0.36 the promesa.core namespace is included with the let and do! macros. An example:

(ns prom
  (:require [promesa.core :as p]))

(defn sleep [ms]
  (js/Promise.
   (fn [resolve _]
     (js/setTimeout resolve ms))))

(defn do-stuff
  []
  (p/do!
   (println "Doing stuff which takes a while")
   (sleep 1000)
   1))

(p/let [a (do-stuff)
        b (inc a)
        c (do-stuff)
        d (+ b c)]
  (prn d))
$ nbb prom.cljs
Doing stuff which takes a while
Doing stuff which takes a while
3

Also see API docs.

Js-interop

Since nbb v0.0.75 applied-science/js-interop is available:

(ns example
  (:require [applied-science.js-interop :as j]))

(def o (j/lit {:a 1 :b 2 :c {:d 1}}))

(prn (j/select-keys o [:a :b])) ;; #js {:a 1, :b 2}
(prn (j/get-in o [:c :d])) ;; 1

Most of this library is supported in nbb, except the following:

  • destructuring using :syms
  • property access using .-x notation. In nbb, you must use keywords.

See the example of what is currently supported.

Examples

See the examples directory for small examples.

Also check out these projects built with nbb:

API

See API documentation.

Migrating to shadow-cljs

See this gist on how to convert an nbb script or project to shadow-cljs.

Build

Prequisites:

  • babashka >= 0.4.0
  • Clojure CLI >= 1.10.3.933
  • Node.js 16.5.0 (lower version may work, but this is the one I used to build)

To build:

  • Clone and cd into this repo
  • bb release

Run bb tasks for more project-related tasks.

Download Details:
Author: borkdude
Download Link: Download The Source Code
Official Website: https://github.com/borkdude/nbb 
License: EPL-1.0

#node #javascript

Hire Dedicated Node.js Developers - Hire Node.js Developers

If you look at the backend technology used by today’s most popular apps there is one thing you would find common among them and that is the use of NodeJS Framework. Yes, the NodeJS framework is that effective and successful.

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Aria Barnes

Aria Barnes

1622719015

Why use Node.js for Web Development? Benefits and Examples of Apps

Front-end web development has been overwhelmed by JavaScript highlights for quite a long time. Google, Facebook, Wikipedia, and most of all online pages use JS for customer side activities. As of late, it additionally made a shift to cross-platform mobile development as a main technology in React Native, Nativescript, Apache Cordova, and other crossover devices. 

Throughout the most recent couple of years, Node.js moved to backend development as well. Designers need to utilize a similar tech stack for the whole web project without learning another language for server-side development. Node.js is a device that adjusts JS usefulness and syntax to the backend. 

What is Node.js? 

Node.js isn’t a language, or library, or system. It’s a runtime situation: commonly JavaScript needs a program to work, however Node.js makes appropriate settings for JS to run outside of the program. It’s based on a JavaScript V8 motor that can run in Chrome, different programs, or independently. 

The extent of V8 is to change JS program situated code into machine code — so JS turns into a broadly useful language and can be perceived by servers. This is one of the advantages of utilizing Node.js in web application development: it expands the usefulness of JavaScript, permitting designers to coordinate the language with APIs, different languages, and outside libraries.

What Are the Advantages of Node.js Web Application Development? 

Of late, organizations have been effectively changing from their backend tech stacks to Node.js. LinkedIn picked Node.js over Ruby on Rails since it took care of expanding responsibility better and decreased the quantity of servers by multiple times. PayPal and Netflix did something comparative, just they had a goal to change their design to microservices. We should investigate the motivations to pick Node.JS for web application development and when we are planning to hire node js developers. 

Amazing Tech Stack for Web Development 

The principal thing that makes Node.js a go-to environment for web development is its JavaScript legacy. It’s the most well known language right now with a great many free devices and a functioning local area. Node.js, because of its association with JS, immediately rose in ubiquity — presently it has in excess of 368 million downloads and a great many free tools in the bundle module. 

Alongside prevalence, Node.js additionally acquired the fundamental JS benefits: 

  • quick execution and information preparing; 
  • exceptionally reusable code; 
  • the code is not difficult to learn, compose, read, and keep up; 
  • tremendous asset library, a huge number of free aides, and a functioning local area. 

In addition, it’s a piece of a well known MEAN tech stack (the blend of MongoDB, Express.js, Angular, and Node.js — four tools that handle all vital parts of web application development). 

Designers Can Utilize JavaScript for the Whole Undertaking 

This is perhaps the most clear advantage of Node.js web application development. JavaScript is an unquestionable requirement for web development. Regardless of whether you construct a multi-page or single-page application, you need to know JS well. On the off chance that you are now OK with JavaScript, learning Node.js won’t be an issue. Grammar, fundamental usefulness, primary standards — every one of these things are comparable. 

In the event that you have JS designers in your group, it will be simpler for them to learn JS-based Node than a totally new dialect. What’s more, the front-end and back-end codebase will be basically the same, simple to peruse, and keep up — in light of the fact that they are both JS-based. 

A Quick Environment for Microservice Development 

There’s another motivation behind why Node.js got famous so rapidly. The environment suits well the idea of microservice development (spilling stone monument usefulness into handfuls or many more modest administrations). 

Microservices need to speak with one another rapidly — and Node.js is probably the quickest device in information handling. Among the fundamental Node.js benefits for programming development are its non-obstructing algorithms.

Node.js measures a few demands all at once without trusting that the first will be concluded. Many microservices can send messages to one another, and they will be gotten and addressed all the while. 

Versatile Web Application Development 

Node.js was worked in view of adaptability — its name really says it. The environment permits numerous hubs to run all the while and speak with one another. Here’s the reason Node.js adaptability is better than other web backend development arrangements. 

Node.js has a module that is liable for load adjusting for each running CPU center. This is one of numerous Node.js module benefits: you can run various hubs all at once, and the environment will naturally adjust the responsibility. 

Node.js permits even apportioning: you can part your application into various situations. You show various forms of the application to different clients, in light of their age, interests, area, language, and so on. This builds personalization and diminishes responsibility. Hub accomplishes this with kid measures — tasks that rapidly speak with one another and share a similar root. 

What’s more, Node’s non-hindering solicitation handling framework adds to fast, letting applications measure a great many solicitations. 

Control Stream Highlights

Numerous designers consider nonconcurrent to be one of the two impediments and benefits of Node.js web application development. In Node, at whatever point the capacity is executed, the code consequently sends a callback. As the quantity of capacities develops, so does the number of callbacks — and you end up in a circumstance known as the callback damnation. 

In any case, Node.js offers an exit plan. You can utilize systems that will plan capacities and sort through callbacks. Systems will associate comparable capacities consequently — so you can track down an essential component via search or in an envelope. At that point, there’s no compelling reason to look through callbacks.

 

Final Words

So, these are some of the top benefits of Nodejs in web application development. This is how Nodejs is contributing a lot to the field of web application development. 

I hope now you are totally aware of the whole process of how Nodejs is really important for your web project. If you are looking to hire a node js development company in India then I would suggest that you take a little consultancy too whenever you call. 

Good Luck!

Original Source

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Sheldon  Grant

Sheldon Grant

1662811500

7 Favorite Node.js IP Geolocation API Libraries

In today's post we will learn about 7 Favorite Node.js IP Geolocation API Libraries. 

Geolocation has to be one of the most underrated yet rewarding innovations for the modern generation. Words cannot describe the impact it has had on our day-to-day personal and professional lives. From tracking lost devices to finding restaurants nearby to dine at, Geolocation has become an integral part of our daily lives.

Geolocation can be simply defined as the process by which the geographic location of a radar source, mobile network, or internet-connected devices can be identified. An IP Geolocation API is a technology that can identify the real-world location of a device connected to the internet.

1 - Node-geoip

Native NodeJS implementation of MaxMind's GeoIP API -- works in node 0.6.3 and above, ask me about other versions

why geoip-lite

geoip-lite is a fully JavaScript implementation of the MaxMind geoip API. It is not as fully featured as bindings that use libgeoip. By reducing scope, this package is about 40% faster at doing lookups. On average, an IP to Location lookup should take 20 microseconds on a Macbook Pro. IPv4 addresses take about 6 microseconds, while IPv6 addresses take about 30 microseconds.

synopsis

var geoip = require('geoip-lite');

var ip = "207.97.227.239";
var geo = geoip.lookup(ip);

console.log(geo);
{ range: [ 3479298048, 3479300095 ],
  country: 'US',
  region: 'TX',
  eu: '0',
  timezone: 'America/Chicago',
  city: 'San Antonio',
  ll: [ 29.4969, -98.4032 ],
  metro: 641,
  area: 1000 }

installation

1. get the library

$ npm install geoip-lite

2. update the datafiles (optional)

Run cd node_modules/geoip-lite && npm run-script updatedb license_key=YOUR_LICENSE_KEY to update the data files. (Replace YOUR_LICENSE_KEY with your license key obtained from maxmind.com)

You can create maxmind account here

NOTE that this requires a lot of RAM. It is known to fail on on a Digital Ocean or AWS micro instance. There are no plans to change this. geoip-lite stores all data in RAM in order to be fast.

View on Github

2 - ipapi-nodejs

Node.js + ipapi (IP address location API)

Installation

npm install ipapi.co

Usage

From Node.js REPL

var ipapi = require('ipapi.co');

var callback = function(res){
    console.log(res);
};

ipapi.location(callback)       // Complete location for your IP address
> { 
    ip: '50.1.2.3',
    city: 'Wilton',
    region: 'California',
    country: 'US',
    postal: 95693,
    latitude: 38.3926,
    longitude: -121.2429,
    timezone: 'America/Los_Angeles' 
  }


ipapi.location(callback, '', '', 'ip')         // Your external IP address
50.1.2.3

ipapi.location(callback, '', '', 'city')       // Your city
Wilton

ipapi.location(callback, '', '', 'country')    // Your country
US

ipapi.location(callback, '8.8.8.8')            // Complete location for IP address 8.8.8.8
> { 
    ip: '8.8.8.8',
    city: 'Mountain View',
    region: 'California',
    country: 'US',
    postal: '94035',
    latitude: 37.386,
    longitude: -122.0838,
    timezone: 'America/Los_Angeles' 
}

ipapi.location(callback, '8.8.8.8', '', 'city')       // City for IP address 8.8.8.8
Mountain View

ipapi.location(callback, '8.8.8.8', '', 'country')       // Country for IP address 8.8.8.8
US

View on Github

3 - Nodejs-geoip2ws

Maxmind GeoIP2 Web Services for Node.js

Usage

You can provide the configuration in the require function or inline at lookup time. The lookup always returns a Promise.

Normal configuration

const geo = require ('geoip2ws') ({
  userId: '12345',
  licenseKey: 'abc678',
});

geo ({
  service: 'city',
  ip: '1.2.3.4',
})
  .then (console.log)
  .catch (console.error)
;

Inline configuration

const geo = require ('geoip2ws')();

geo ({
  userId: '12345',
  licenseKey: 'abc678',
  service: 'city',
  ip: '1.2.3.4',
})
  .then (console.log)
  .catch (console.error)
;

Installation

You need a Maxmind account ID and license key with enough credits for one of their GeoIP web services. You can find both here.

npm i geoip2ws

View on Github

4 - Request-ip

A Node.js module for retrieving a request's IP address on the server.

Installation

Yarn

yarn add request-ip

npm

npm install request-ip --save

Getting Started

const requestIp = require('request-ip');

// inside middleware handler
const ipMiddleware = function(req, res, next) {
    const clientIp = requestIp.getClientIp(req); 
    next();
};

// on localhost you'll see 127.0.0.1 if you're using IPv4 
// or ::1, ::ffff:127.0.0.1 if you're using IPv6

As Connect Middleware

const requestIp = require('request-ip');
app.use(requestIp.mw())

app.use(function(req, res) {
    const ip = req.clientIp;
    res.end(ip);
});

View on Github

5 - Node-iplocate

Find geolocation data from IP addresses (e.g. city, country, timezone) using the IPLocate.io API

Installation

npm install node-iplocate

Usage Example

const iplocate = require("node-iplocate");

iplocate("8.8.8.8").then(function(results) {
  console.log("IP Address: " + results.ip);
  console.log("Country: " + results.country + " (" + results.country_code + ")");
  console.log("Continent: " + results.continent);
  console.log("Organisation: " + results.org + " (" + results.asn + ")");

  console.log(JSON.stringify(results, null, 2));
});

// Or with callbacks
iplocate("8.8.8.8", null, function(err, results) {
  // ...
  console.log(JSON.stringify(results, null, 2));
});

// Provide an API key from IPLocate.io
iplocate("8.8.8.8", { api_key: "abcdef" }).then(function(results) {
  // ...
});

IP Address: 8.8.8.8
Country: United States (US)
Continent: North America
Organisation: Google LLC (AS15169)

{
  "ip": "8.8.8.8",
  "country": "United States",
  "country_code": "US",
  "city": null,
  "continent": "North America",
  "latitude": 37.751,
  "longitude": -97.822,
  "time_zone": null,
  "postal_code": null,
  "org": "Google LLC",
  "asn": "AS15169"
}

View on Github

6 - Express-ipfilter

A light-weight IP address based connection filtering system

Installation

Recommended installation is with npm. To add express-ipfilter to your project, do:

npm install express-ipfilter

Usage with Express

Denying certain IP addresses, while allowing all other IPs:

// Init dependencies
const express = require('express')
const ipfilter = require('express-ipfilter').IpFilter

// Deny the following IPs
const ips = ['127.0.0.1']

// Create the server
app.use(ipfilter(ips))
app.listen(3000)

Allowing certain IP addresses, while denying all other IPs:

// Init dependencies
// Init dependencies
const express = require('express')
const ipfilter = require('express-ipfilter').IpFilter

// Allow the following IPs
const ips = ['127.0.0.1']

// Create the server
app.use(ipfilter(ips, { mode: 'allow' }))

module.exports = app

View on Github

7 - Nodejs-geolocation

Google Maps Geolocation API for Node.js (unofficial)

Example

const geo = require ('google-geolocation');

function out (obj) {
  console.dir (obj, {
    depth: null,
    colors: true,
  });
}

// Get data
geo ({
  key: 'abc123',
  wifiAccessPoints: [{
    macAddress: '01:23:45:67:89:AB',
    signalStrength: -65,
    signalToNoiseRatio: 40,
  }],
})
  .then (out)
  .catch (err => {
    out (err);
    process.exit (1);
  })
;

Installation

npm i google-geolocation

View on Github

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Related videos:

API-Review of an IP Geolocation API

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