I am trying to catch failed Ajax requests, but I'm talking about
requests that receive no response from the server (server is down),
not responses that result in a 500.
The latter can be handled with the onException or onFailure callback,
but I am not able to handle the former.
To reproduce/test:
1) Start your server
2) Create a page that does this: Ajax.PeriodicalUpdater('foo',
'/valid/url', { onFailure: function(){alert('failure')}, onException:
function(){alert('exception')})
3) Bring the page up in your browser
Initially, if the response is 200, you should see nothing. If you
change the response to be a 404, you will see "failure". Change the
response to be a 500, you will still see "failure". Bring the server
down, you will not see anything, yet if you have Firebug running you
will see that the requests resulted in errors (highlighted in red in
Firebug).
Two questions arise:
1) When does onException fire?
2) Is it possible to catch "server down" scenarios?
Thanks guys.
-justin
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