Laravel and ngrok: url domain is not correct for routes and assets

My setup:

• Homestead on Mac OSX with multiple sites configured
• I have one site setup using domfit.test as the local domain (auto mapped using hostsupdater)

My problem:

If I vagrant ssh, and then share domfit.test I get a random generated ngrok url as you'd expect (http://whatever.ngrok.io), however when I access this URL all my resources / routes are being prefixed with http://domfit.test/ (http://domfit.test/login for instance)

I've tried the following:

• Setting APP_URL as the ngrok URL
• php artisan config:clear
• php artisan cache:clear
• {{ url('login') }}
• {{ route('login') }}

My understanding is that url() should return the actual URL that the browser requested (rather than using APP_URL) but it always returns domfit.test.

If I rename my site in Homestead.yaml (for example to newdomfit.test) and re-provision then this is the domain that url() and route() uses, regardless of my APP_URL. So the Homestead.yaml seems to be forcing that domain. Which begs the question - how are you meant to actually use the share functionality?

I'm new to Laravel so I am not sure if all of this is expected behavior and I am misunderstanding something?

I just want my links and resources in templates to work for local (domfit.test), shared (ngrok) and eventually production with the same piece of code. My worry is I will have to change all of my route() or url() references when I attempt to put this website live.

EDIT BELOW

OK I've just tried again. Changed APP_URL for ngrok:

Searched my entire codebase for domfit.test, and only some random session files seem to have references:

code/domfit/storage/framework/sessions/

APP_NAME=DomFitAPP_VERSION=0.01APP_ENV=localAPP_KEY=XXXXAPP_DEBUG=trueAPP_URL=http://04b7beec.ngrok.io

Then in my Controller I have it doing this for some simple debugging:

echo(url('/login'));echo(route('login'));echo($_SERVER['HTTP_HOST']);echo($_SERVER['HTTP_X_ORIGINAL_HOST']);

If I use the ngrok URL the output I get is:

http://domfit.test/loginhttp://domfit.test/logindomfit.test04b7beec.ngrok.io

I don't understand how $_SERVER['HTTP_HOST'] is returning the wrong url?

It looks like it could be related to this: https://github.com/laravel/valet/issues/342

ANOTHER EDIT

It looks like it has to do with Homestead's share command:

function share() {if [[ "$1" ]]then    ngrok http ${@:2} -host-header="$1" 80else    echo "Error: missing required parameters."    echo "Usage: "    echo "  share domain"    echo "Invocation with extra params passed directly to ngrok"    echo "  share domain -region=eu -subdomain=test1234"fi

}

Which passes the option -host-header to ngrok which according to their documentation:

Some application servers like WAMP, MAMP and pow use the Host header for determining which development site to display. For this reason, ngrok can rewrite your requests with a modified Host header. Use the -host-header switch to rewrite incoming HTTP requests.

If I use ngrok without it, then the website that gets displayed is a different one (because I have multiple sites configured in Homestead) - so I'm still not sure how to get around this. For the time being I could disable the other sites as I'm not actively developing those.