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Redirecting servlet response between windows

Ulvi Cetin
Ranch Hand

Joined: Mar 03, 2003
Posts: 39
I have 2 browser windows open (say A and B). On one of the windows (say on A), when I click on the submit button, it calls a servlet (which does some stuff). When the servlet finishes, I want to send the resonse to the other browser window (window B). I am using response.sendRedirect(), but this is sending it back to the original window (A), as expected. Is there a way to send the response to the other window?
William Brogden
Author and all-around good cowpoke

Joined: Mar 22, 2000
Posts: 12761
The thing is - a response is always sent to the browser a request came from.
Your browser B might be running some sort of JavaScript loop checking for the availability of the newly computed page.
It would be easiest if window B was opened from window A so they would share the same sessionID cookie.
Bear Bibeault
Author and ninkuma

Joined: Jan 10, 2002
Posts: 60785

As William pointed out, once the request is sent to a specific window, that is where the response will be sent.
If you want the response to appear in the 2nd window, you will need to submit the request to it and not to the first window.
If the request is triggered via a form submission, or the result of clicking a link, you can control which window the request is submitted to with the target attribute in the form or anchor tag.
If you need more control than that, you can create the window via and then control any Javascript in the page loaded into that window, or even submit the request directly to that window.
[ July 22, 2003: Message edited by: Bear Bibeault ]
[ July 22, 2003: Message edited by: Bear Bibeault ]

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Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 15959

Or, to put it another way, HTTP can't send unsolicited information, only info in response to a request.
And the response always goes back to the same place it was requested from.

Customer surveys are for companies who didn't pay proper attention to begin with.
It is sorta covered in the JavaRanch Style Guide.
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