php - how to know where http request 302 leads?

I'm working on Shopify API and trying to register uninstall webhook for my plugin which is registered successfully and i do get a response e.g.

stdClass Object
(
[webhook] => stdClass Object
    (
        [id] => 52102211
        [address] => http://www.example.com/dev1/login?code=42db53dae6d706f095711b8365a941e8&hmac=6ca8a5fa6659ea9b976454d352c73024d98417b0e20665c08090c636d3c9662b&shop=my-shopify-shop.myshopify.comsignature=ed384b260216b100ea2090e0d3c26460Г—tamp=1438850605/delete_shop
        [topic] => app/uninstalled
        [created_at] => 2015-08-06T04:43:27-04:00
        [updated_at] => 2015-08-06T04:43:27-04:00
        [format] => json
        [fields] => Array
            (
            )

        [metafield_namespaces] => Array
            (
            )

    )
)
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When i delete my plugin it generates a 302 POST request.

I want to see that where does this request leads so that I'd be sure that it is coming straight to my controller action for handling this i.e. to example.com/delete_shop

I'm working in PHP CI and sending email in my code upon the call of this function. Here are the routes:

$route['default_controller'] = "home";
$route['product_edit/:any'] = "home/product_edit";
$route['delete_shop'] = "home/delete_shop";
$route['404_override'] = '';
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Is there any problem with my routes because I never receive an email even after hours? (email functionality is working properly in the application though)

EDIT :

here is the image for the request generated

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