Notify node.js when user leave the page

[Sunil Khedar]

Hi All,

I have tried for "unload" and "beforeunload" binding in following
code, but none of the browser, except FF, is sending a request to
node.js:

$(window).bind('unload', function(){
$.ajax({cache: false,
dataType: "script",
async: false,
url: "http://node.example.com/unsubscribe"
});
});

Any suggestion, how to notify node.js that user is leaving the page?

Thank you,
Sunil Khedar

[Marak Squires]

It should be noted that the unload event is never guaranteed to fire in the browser.

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[r...@tinyclouds.org]

Add a listener for the 'close' event on request.connection?

[Aaron Heckmann]

I'd definitely use onbeforeunload. I wonder if just creating the
request with an img does the trick?

(new Image()).src = "node.example.com/die"

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[Connor Dunn]

> I'd definitely use onbeforeunload. I wonder if just creating the
> request with an img does the trick?
>
> (new Image()).src = "node.example.com/die"

In my experience onbeforeunload with a jQuery ajax request works most
of the time in IE7 (not tested other IEs), Firefox and Chrome, it
doesn't always work though.

[Miguel Cavaco Coquet]

I cant be 100% sure now, but if i recall correctly, to use
onbeforeunload or onunload you need to stop the event before you do
anything, or it wil kill your ajax request before its done. That in
turn will probably present you with a nice browser popup thing.

My suggestion would be to handle this on the server if possible.

Good luck :)

[Connor Dunn]

> I cant be 100% sure now, but if i recall correctly, to use onbeforeunload or
> onunload you need to stop the event before you do anything, or it wil kill
> your ajax request before its done. That in turn will probably present you
> with a nice browser popup thing.

You don't need to stop the event for the ajax request to fire.

[Miguel Cavaco Coquet]

as long as it gets executed quickly, your right :) If its buried in
code, it might not. It should work, but its rather flaky.

[Chris Winberry]

Does the current page maintain a comet-like connection to the server? If so, then when the browser leaves the page it is going to cleanly shut down the connection (hopefully, otherwise you have to wait 30 secs for a timeout) which will be marked by a close event at the TCP level, rather than the HTTP level. Ryan has already mentioned this; what you're trying trying to do is more complicated and less reliable.

On Apr 13, 2010 8:47 AM, "Miguel Cavaco Coquet" <mco...@gmail.com> wrote:

as long as it gets executed quickly, your right :) If its buried in code, it might not. It should work, but its rather flaky.

On 2010/04/13, at 13:34, Connor Dunn wrote:

>> I cant be 100% sure now, but if i recall correctly...