How to hook all fetch requests from a browser?

[gappel]

Hello All,

I need to intersept all fetch requests from a browser (including initial loading, refreshes, events etc).
Specifically, I need to redirect all data requests.
I strongly prefer clientless approach i.e. I need to do it from within the HTTP response itself (or using java script injection).

I need to do it for as many browsers as possible so throw anything you've got at me...

Any thoughts will be much appreciated!

Thanxxx
Greg.

[ILoveJackDaniels]

Let's start at the beginning...

You want to intercept all requests from a browser to your site to redirect them. Do you want to redirect them to another site, or somewhere within your own site? mod_rewrite may be what you are looking for if so (and you are hosting on Apache ... otherwise, isapi_rewrite for IIS).

If you do use server-side redirection, the browser is irrelevant and it will work whatever they are using.

Using mod_rewrite, you can send a 301 or a 302 redirection header back to the user depending on whether the redirect is permanant or temporary.

[gappel]

No, I want to intercept all requests from a browser to allsites and redirect them to me - it is as if I were to configure a proxy.

But I cannot configure a proxy - mant reasons for that.
I need to hook client requests while they are still on the client.
I need to do it transparently to the client machine i.e. no installations, prompting, admin privileges etc.

Is there a way?

P.S.
Don't worry, I am not writing a spy software. I need it because the job I have to do is much easier done on the client side than on the server side.