Share cookies or local storage data between cross domain in Angular ?

www.internetkatta.com

 

Hello Am Avinash

- @aviboy2006

 

www.example.com​
abc.example.com​

Agenda :

  • What is cookies or local storage data ?

  • Why it  is required to share ? 

  • How can share it between subdomain or cross domain ?

  • Demo

  • Discussion (Q/A)

@aviboy2006

What is cookies/local storage data ? ?  🤔

  • HTTP Cookie - is a small piece of data stored on the user's computer

  • Local storage - The localStorage properties allow to save key/value pairs in a web browser.

@aviboy2006

Why it is required to share ?

@aviboy2006

  • When two domain share same resources like one is www.example.com and one is customer.example.com

  • Two domain rights with same owner or accessible

  • Avoid multiple times resource access or fetch if it duplicate across two subdomain or cross domain

  • Major use case is when login to one domain and access to all subdomains 

How to share those ? 

@aviboy2006

Sender Code

@aviboy2006

HTML Code

function postCrossDomainMessage(msg) {
  var win = document.getElementById('ifr').contentWindow;
  win.postMessage(msg, "http://example.com/");
}
var postMsg = {"login": "user"}; // this is just example
postCrossDomainMessage(postMsg);




<iframe style="display:none;" src="http://example.com/getlocalstorage.html" id="ifr"></iframe>

Javascript Code

Receiver Code

@aviboy2006

Text

var PERMITTED_DOMAIN = "http://example.com";
/**
 * Receiving message from other domain
 */
window.addEventListener('message', function(event) {
    if (event.origin === PERMITTED_DOMAIN) {
        //var msg = JSON.parse(event.data);
        // var msgKey = Object.keys(msg)[0];
        if (event.data) {
            localStorage.setItem("localstorage", event.data);
        } else {
            localStorage.removeItem("localstorage");
        }
    }

});

Demo 

@aviboy2006

Two Angular apps share their login data between them using pub-sub pattern

 

Any Question ? 

@aviboy2006

Reference:

@aviboy2006

  • https://www.internetkatta.com/share-cookies-or-local-storage-data-between-cross-domain

  • https://github.com/aviboy2006/cross-domain-cookie-sharing

  • https://github.com/aviboy2006/cookie-or-localstorage-sharing-in-angular-apps

  • https://en.wikipedia.org/wiki/HTTP_cookie

  • https://www.w3schools.com/jsref/prop_win_localstorage.asp

Thank You !

You can reach out to me here 👇🏻

@aviboy2006

@aviboy2006

https://www.linkedin.com/in/avinash-dalvi-315b021a/

avinashsdalvi@gmail.com

www.internetkatta.com

Share cookies or local storage data between cross domain in Angular?

By Avinash Dalvi

Share cookies or local storage data between cross domain in Angular?

Host Angular web app on AWS using S3 and CloudFront. Automate build deployment that recovers from failure. Walk through most common issues that occur in AWS S3 web hosting

  • 4,362