Load Blade assets with https in Laravel

I had a problem with asset function when it's loaded resources through HTTP protocol when the website was using HTTPS, which is caused the "Mixed content" problem.

To fix that you need to add \URL::forceScheme('https') into your AppServiceProvider file.

So mine looks like this (Laravel 5.4):

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        if(config('app.env') === 'production') {
            \URL::forceScheme('https');
        }
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}

This is helpful when you need https only on server (config('app.env') === 'production') and not locally, so don't need to force asset function to use https.

I believe secure_asset is what you're looking for.

<link href="{{ secure_asset('assets/mdi/css/materialdesignicons.min.css') }}" media="all" rel="stylesheet" type="text/css" />

5/15/2018 Edit: While my answer addresses the question directly, it's a bit dated given what Laravel can do nowadays; there may be cases where you want to force HTTPS on certain environments but not on others.

See Scofield's answer below for a more flexible solution to cover for these kinds of cases.

08/11/2020 Edit: Seriously guys, Scofield's Answer is better than mine and will provide more flexibility for differing environments. Give him your updoots.

I use @Scofield answer by use \URL::forceScheme('https'); This solution also worked to show https for all routes but this not worked for me for $request->url() it show http instead of https

so I used $this->app['request']->server->set('HTTPS', true); instead of \URL::forceScheme('https');

I'm using Laravel 5.4 and update .env file and appserviceproviders

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Schema;
use Log;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     *
     */
    public function boot()
    {
        If (env('APP_ENV') !== 'local') {
            $this->app['request']->server->set('HTTPS', true);
        }

        Schema::defaultStringLength(191);
    }

    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }
}

in my env file I've changed

APP_ENV=local to APP_ENV=development

APP_ENV=local for localhost APP_ENV=development/production for on working server

after changing env run this artisan command

php artisan config:clear

Hope It helps :-)

There is a environment variable "ASSET_URL" where you put your app url with the http or https

ASSET_URL=https://your.app.url #for production

or

ASSET_URL=http://your.app.url #for local development