How does facebook check instantly user has logged out from other tab? - facebook

I was playing with inspect element the other day and what I did was I opened facebook in two tabs and logged out from the other tab. As soon as I returned back to the logged in tab, it showed me Login modal. How did it check instantly as no service request was made to allow them to check if the user has logged out.
Same happens with manual cookie clearance from Application tab in the developers console and also if you deactivate your account from app, the website open on your laptop shows to login. How does that happen so instantly? Is that a Websocket?

Related

Third party authentication doesn't work from facebook browser

I have a web application (React js with Kotlin backend) that has normal email + pw (plus PIN) login, and it also supports 3rd party authentication (Google and Facebook). It works on mobile and web, however, when I open my webpage through Facebook app - which opens it's own browser - and try to log in with 3rd party authentication, I can click on that "Continue as me" button, but then the page refreshes and I'm not logged in. I saw the same thing happen on other sites too, e.g. Figma, Pinterest, etc. I thought it's impossible to log in this way anymore, however, I just noticed that you can actually log in to Stackoverflow this way (so facebook app -> facebook browser -> stack overflow -> 3rd party auth and it works).
Has anyone figured it out how it was possible for Stackoverflow to do this?
Ok, I found the solution. The problem was that when a user clicked on 'Login with FB' button on my site, I sent a request to fb to get back a content of a login window and I created a pop up window where I rendered it, I put on a listener on that pop up window and once it was done, then I got the access token and sent it to backend and logged the user in. On a normal browser it works perfect (both pc and mobile) but as I mentioned above it didn't work in an in app browser like facebook app.
The issue was that facebook app opens a website in it's own browser that doesn't handle any pop ups, so after a successful authentication I saw that nothing happened and it was because we were not redirected to the original window where we should have, and it had the token in the url. So the solution was instead of making this pop up window for FB login, just redirect the user to the fb login page (and stay on the same window), and once the login is successful, just handle the token as is.

Logout seems to not invalidate session in Azure Static Web Apps

I created a static Web site using Azure Static Web Apps (under the Free plan for now -- not sure if that's relevant to the issue at hand.) I can access the Web site through an ***.azurestaticapps.net URL.
I then tried to test Azure Active Directory authentication per Microsoft's instruction from this page:
https://learn.microsoft.com/en-us/azure/static-web-apps/authentication-authorization
My problem is that logging out does not seems to work as I would expect on a normal Web site. I could log out, but when I tried to login again (hoping to use a different Azure AD account,) the Microsoft login screen flashes by and I got logged right back in with the user that I just logged out from. Switching to a different tab doesn't help.
Steps to repro:
Navigate to /.auth/login/aad and login using a Microsoft Account. Say NO to 'Stay signed in?' prompt.
Navigate to /.auth/me to see the basic information on the logged in account to prove that I'm in the logged in state.
Navigate to /.auth/logout to logout. Immediately, navigate to /.auth/me again to confirm that my static Web App regards me as 'logged out.' I'd see this:
{"clientPrincipal": null}
Navigate to /.auth/login/aad again. Microsoft login page flashes by, and I am logged right back in with the previously logged out user.
Things that sort of worked
Any of the two actions below alone seems to make the browser forget my logged-in state:
Close the whole browser and relaunch it. I'd get asked to pick the previous user (and then enter the password) or choose a new user. This sort of works but reminds me of some Web sites 15-20 years ago that said 'For security reasons, please don't forget to close your entire browser after logging out from this one tab.'
Open a new tab in the same browser, and navigate to hotmail.com. That tab will enjoy my logged-in state from the Static Web Apps tab. I'd see my mails right away. Then I log out from the hotmail.com tab, switch back to ***.azurestaticapps.net tab and see that I am still logged into my Static Web App. Good! Then if I log out from my Static Web App and try to log back in, it has forgotten my logged-in state this time. In other words, logging out from the hotmail.com tab is somehow more powerful.
I also tested /.auth/login/google too and the same problem arises! So the issue seems to be on the Azure Static Web Apps side, not how idPs handle their logout process.
Am I missing anything obvious?

How to retrieve Logged In User’s Credentials from device

I have a login page in my Ionic App. The current behavior of the app is as below:
After downloading the app, User launches it.
The app shows Login Options (buttons) page (right now, I only have Microsoft (Azure Active Directory)).
Tapping any of the options, the app asks for login credentials (email and password).
The app authenticates these credentials against the server/corresponding vendors.
Upon successful authentication, the user is taken to Home Page of the app.
Now the important part, for all the subsequent launches, when the user taps on the 'Microsoft' (again, this is the only option I have right now) button it doesn't ask for credentials (emails ID and password). Instead it takes the User to Home Page directly.
So, I am sure the user credentials and/or its corresponding token or something similar is being maintained in the device somewhere.
How do I access this information programmatically?
What I am trying to achieve is: If the user credentials/token already exist on the device then don't even shot the Login Options Page. Take the user to the Home Page directly after the app is launched.
Any ideas/pointers/suggestions on how this can be done.
Thank you!

Facebook page tab prompting for login, but it shouldn't

When a user is not logged in and they navigate to a page tab made with our app, they get an obtrusive dialog asking them to log in:
This has nothing to do with http vs https, the app is not in sandbox mode, there is nothing in the tab asking for a login or user information, etc. I've gone through the app settings at least a half dozen times now, and nothing is wrong there. Aside of urls, the settings are identical to another app I have that does not suffer from this problem. I'm stumped!
Edit: here is an affected tab: https://www.facebook.com/StaticHtmlThunderpenny/app_203351739677351
This message is not about login to your app, but Facebook in general.
So my guess would be that the page your app is installed as page tab app on is restricted in some way – by age, location, or for having alcohol-related content. And then of course Facebook asks for login, because otherwise they can not determine whether or not the (as of now still “anonymous”) user qualifies to see the page.
So go check the page settings.
This is actually not app related question.
This is thumb rule!! To access any app on Facebook, you need to log in to Facebook. You can see Facebook page without log in. But for facebook apps, you should be authentic user.
with this issue in my own experience that I came across some years back with a facebook app that I was running, if this doesn't relate to any of your other social networking apps then am aligning two set of possibilities and solution.
The user might have not properly logged out as "written" in the app for the users logout stage.
Solution would be that the user logout as expected before closing the app.
The user might have set up an automatic login prompt which was removed by the app when it was been updated automatically. (If you do get me???)
Solution would be to monitise your app on updates and login informations or better still just login and logout ask intended by the app and for security reasons.
Lastly I would say that automatic bookmark database should be added to the server part so current pages as the user uses the app would be saved after logout or login stage. Thank you, hope this helps and if not let me know what am missing.

open login screen when loading app

I have a like,share,win app on my website.
watch example on:
https://www.facebook.com/ExpertLemmer/app_358973127531240
The problem is when you click like, and your not logged in, FB opens the login screen, after login in it re-directs to my usual FB fanpage and not to the next app page. When already logged in it works like it should.
Is there a way to force people to log in when the first page is opened?