Manually attach package to Laravel (unable to use composer due to firewall) - php

Question

I can't use composer to handle my dependencies due to the corporate firewall. At the moment I'm trying to use Barry vd Heuvel's DomPDF wrapper for Laravel and tried to:
Download the zipfile from Github (master)
Updated composer.json (not sure if its needed, but did it anyway) and added "barryvdh/laravel-dompdf": "*" in the require container.
Create the folder structure: vendor/barryvdh/laravel-dompdf
Place all files from the package in there (config-folder, src-folder and the files .gitignore, composer.json and readme.md)
Add the service provider and facade in my app.php. Service provider is listed as Barryvdh\DomPDF\ServiceProvider::class and the facade is aliased like 'PDF' => Barryvdh\DomPDF\Facade::class
Ran composer dump-autoload
After refreshing the browser I'm getting Class 'Barryvdh\DomPDF\ServiceProvider' not found. I also tried to run php artisan cache:clear and php artisan dump-autoload but the last one fails over the fact it can't find Barryvdh\DomPDF\ServiceProvider.
What have I forgotten to do to make it work?
Update
I've tried the suggested answer from Wouter J and the composer.json now looks like:
..
"autoload": {
"classmap": [
"database"
],
"psr-4": {
"App\\": "app/",
"Barryvdh\\DomPDF\\": "vendor/barryvdh/laravel-dompdf/src"
},
..
I've verified if the composer dump-autoload had any effect but I think it had. Because the entry is now also listed in vendor/composer/autoload_psr4.php like:
return array(
// more entries
'Barryvdh\\DomPDF\\' => array($vendorDir . '/barryvdh/laravel-dompdf/src'),
'App\\' => array($baseDir . '/app'),
);
I believe at this point this is working, but the Facade isn't responding. When I try to call something like PDF::loadView(...) and I let PhpStorm import the class (vendor/barryvdh/laravel-dompdf/src/PDF.php) it throws an error I can't call the method loadView statically. According to the documentation I should be able to call it like this:
$pdf = PDF::loadView('pdf.invoice', $data);
return $pdf->download('invoice.pdf');
But that results in Non-static method Barryvdh\DomPDF\PDF::loadView() should not be called statically, assuming $this from incompatible context on my end.
Suggestions?

Answer 1

Composer autoload still doesn't know anything about how to download the package. You have to configure autoloading like this:
{
"autoload": {
"psr-4": { "Namespace\\Of\\The\\Package\\": "vendor/the/package" }
}
}

Answer 2

I know this question is old, but since I don't see any solution, here is mine: I had exactly the same problem. Was able to solve by running composer dumpautoload on my localhost and then copied the folder 'vendor/composer' to the shared hosting without an SSH access. Hope this will help someone in similar situation.

Answer 3

The problem addresses that application don't know about DomPDF\ServiceProvidor or anything related to DomPDF because barryvdh/laravel-dompdf itself depends dpmpdf/dompdf package which is still missing and does not comes with barryvdh/laravel-dompdf
the package dompdf/dompdf also depends on several extension i.e.
PHP version 5.3.0 or higher
DOM extension
GD extension
MBString extension
php-font-lib
php-svg-lib
have a look at package here https://packagist.org/packages/dompdf/dompdf download this and put in your vendor directory then update your composer dumpautoload it should be working