How to communicate in tabs of browsers , when tab is opened from one website

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I have a MVC application, I have button on this application (lets call this web site as "A"). On the click of
that button , I am opening another website(lets call this web site as "B") in new tab(This is not my website, I don't know internal implementation of this website)
I have below issues,
1) I will be showing loading image on website "A" tab until user works on Website "B" . I want to continue with my website (web site "A") when tab with website "B" is closed.
So how will I come to know when another tab is closed?
2) On submit of website B it will call Action method of web site A. But then anything I write in this action method is getting executed in second tab.
How can I make it run in initial browser tab?

What I have tried:

I have tried to catch tab close by OnBeforeUnload of javascript but as in tab 2 there is totally separate application I am not able to notify tab close to application (as I cant change the code of 2nd application)

Posted 11-Feb-16 23:08pm

Black Mamba Elapidae

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Sergey Alexandrovich Kryukov 12-Feb-16 11:43am

Bad idea... Why? What are you trying to achieve, ultimately?
—SA

Black Mamba Elapidae 14-Feb-16 23:14pm

I know it is a bad idea . But as I mentioned already website B is not in my control and it is already designed to work in this way. this site B can be opened with HttpPost with some json data. user is supposed to select data in site B and it will send that data to site A (target url is already sent in initial request json)

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F-ES Sitecore · Answer 1 · 2016-02-11T23:21:00

Solution 1

1) You can't know this

2) I don't understand how it is calling an action on your site when you say the sites are not connected. Anyway you can do this if you give the browser tab A a name, and the form on site B needs to set the "target" of it's form to be the name of tab a, and it *should* submit to that tab, but this might not work on all browsers, and as you don't own site B I don't see how you can make this change.

I can't see you ever getting this to work, cross-site interaction is usually limited deliberately in browsers for security reasons.

Posted 11-Feb-16 23:21pm

F-ES Sitecore

Comments

Black Mamba Elapidae 12-Feb-16 5:50am

Thanks for quick response.
The website B I am mentioning is a courier website and they post the selected data on exposed url, that is how application B is calling action method of my application . :)

Sergey Alexandrovich Kryukov 12-Feb-16 11:44am

Aren't you concerned with server push? Then the approach can be totally different. Your goals are still unclear though...
—SA

Black Mamba Elapidae 14-Feb-16 23:20pm

I am not sure what are you suggesting with server push.. Please refer my comment on main thread ..

Sergey Alexandrovich Kryukov 14-Feb-16 23:51pm

Well, it's always useful to read and learn what is server push ("push technology" vs "pull technology"), this is one of the most fundamental issues of programming...
—SA