Laravel URL facade temporarySignedRoute to external url - php

Question

I'm using Laravel 8 to generate a temporary signed route and pass some params, but I'd like my URL to take me to some URL of my choosing rather than a page in my project.
For context, my Laravel 8 project is an API, so there are no views, my API is then consumed by a front-end project written in Nuxt.
I've tried adding my URL to the first arg of temporarySignedRoute but it says that my route isn't found.
$verifyURL = URL::temporarySignedRoute(
'https://example.com/account/verify', Carbon::now()->addHours(24), ['contact' => 5, 'team' => 'john']
);
What am I missing or what workaround is there here?
UPDATE
So it turns out that I don't need to take the user to an external URL, but it seems that the wrong URL is being generated by URL::temporarySignedRoute.
The start of my generated URL is (for example) https://example.com/api/contact/verify and I need the URL to be https://api.example.com/api/contact/verify
So the same domain, except a sub-domain.
It looks like the APP_URL isn't being read because I changed it and it has no impact, and besides, this is used elsewhere, so I tried updating the URL with:
$verifyURL = URL::temporarySignedRoute(
'contact.verify', Carbon::now()->addHours(24), ['contact' => 5, 'team' => 'john]
);
// fix for wrong URL
$verifyURL = str_replace('example.com', 'api.example.com', $verifyURL);
However, this appears to have an invalid signature when the link provided by $verifyURL is clicked? How can I get the api part at the beginning?

Answer 1

URL::temporarySignedRoute() has a fourth parameter called $absolute which is a boolean. So if you want to prepend a custom url rather than the default url used by Laravel, this is the variable to change.
The default value for $absolute is true. Therefore in order to prepend your own custom url, be sure to change it to false first as below:
$verifyURL = URL::temporarySignedRoute(
'contact.verify', Carbon::now()->addHours(24), ['contact' => 5, 'team' => 'john], false // The $absolute value
);
Then concatenate your custom url:
$your_custom_url . $verifyURL;

Answer 2

First step, in the AppServiceProvider boot method, you need to register custom URL signing:
public function boot()
{
// This allows us to generate a temporary url for report downloading
Storage::disk('reports')->buildTemporaryUrlsUsing(function ($path, $expiration, $options) {
return URL::temporarySignedRoute(
'report.download',
$expiration,
array_merge($options, ['path' => $path])
);
});
}
To create the URL:
Storage::disk('reports')->temporaryUrl($pathname, Carbon::now()->addSeconds(10))
To download the file, this is my controller:
<?php
declare(strict_types=1);
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use Storage;
use URL;
class ReportDownloadController extends Controller
{
public function download(Request $request)
{
if (!URL::signatureHasNotExpired($request)) {
return response('The URL has expired.');
}
if (!URL::hasCorrectSignature($request)) {
return response('Invalid URL provided');
}
return Storage::disk('reports')->download($request->get('path'));
}
}