Created
May 22, 2020 07:03
-
-
Save seanmars/cbf9a12533bb1edf04681515d1c43817 to your computer and use it in GitHub Desktop.
How to detect the location of your website's users with Javascript for free?
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| //regular expressions to extract IP and country values | |
| const countryCodeExpression = /loc=([\w]{2})/; | |
| const userIPExpression = /ip=([\w\.]+)/; | |
| //automatic country determination. | |
| function initCountry() { | |
| return new Promise((resolve, reject) => { | |
| var xhr = new XMLHttpRequest(); | |
| xhr.timeout = 3000; | |
| xhr.onreadystatechange = function () { | |
| if (this.readyState == 4) { | |
| if (this.status == 200) { | |
| countryCode = countryCodeExpression.exec(this.responseText) | |
| ip = userIPExpression.exec(this.responseText) | |
| if (countryCode === null || countryCode[1] === '' || | |
| ip === null || ip[1] === '') { | |
| reject('IP/Country code detection failed'); | |
| } | |
| let result = { | |
| "countryCode": countryCode[1], | |
| "IP": ip[1] | |
| }; | |
| resolve(result) | |
| } else { | |
| reject(xhr.status) | |
| } | |
| } | |
| } | |
| xhr.ontimeout = function () { | |
| reject('timeout') | |
| } | |
| xhr.open('GET', 'https://www.cloudflare.com/cdn-cgi/trace', true); | |
| xhr.send(); | |
| }); | |
| } | |
| // Result {"countryCode":"SK","IP":"xxx.xxx.xxx.xxx"} | |
| initCountry().then(result => console.log(JSON.stringify(result))).catch(e => console.log(e)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment