Rails - Jul 2006 - redirect being performed on server when via AJAX call?

Hi,

I''m having a hard time understanding why when I make a request via an 
AJAX call that triggers a redirect, the redirect seems to be performed 
by the server and the response of that subsequent request is the one 
sent back to the client.

I am aware I can send back JavaScript in the response to perform the 
location change rather than a redirect but I''d like to have the 302 
response sent to the client, if possible. Prototype.js has the ability 
to bind an event to a 302 status, yet the client only ever gets the 200 
OK response of the request made to the redirect page.

Anyone care to enlighten me?

Many thanks
Ian

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Ian wrote:
> Hi,
> 
> I''m having a hard time understanding why when I make a request via
an
> AJAX call that triggers a redirect, the redirect seems to be performed 
> by the server and the response of that subsequent request is the one 
> sent back to the client.
> 
> I am aware I can send back JavaScript in the response to perform the 
> location change rather than a redirect but I''d like to have the
302
> response sent to the client, if possible. Prototype.js has the ability 
> to bind an event to a 302 status, yet the client only ever gets the 200 
> OK response of the request made to the redirect page.
> 
> Anyone care to enlighten me?
> 
> Many thanks
> Ian
OK, I''ve finaly managed to track down what''s going on here
(after way
too long). XMLHttpRequest will transparently follow redirect responses 
(may be different from browser to browser though). So if you''re doing
an
AJAX call to replace a div (or whatever) with the returned content and 
you trigger a redirect you''re going to get the content of the redirect 
page in your div. If you send back some javascript (which Prototype will 
evaluate) to set location.href you''ll get redirected, but
you''ll also
see the text in your div before it does (due to using the :update 
callback on your form). So the way round this is to render whatever you 
need on the backend and send it to the frontend as Json along with some 
status inforation and do your div upadting or redirection there.

Hope this saves someone the time I wasted trying to figure it out :)

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