'Error: While updating laravel 8 to 9. Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1

Nothing to install, update or remove Generating optimized autoload files Class App\Helpers\Helper located in C:/wamp64/www/vuexylaravel/app\Helpers\helpers.php does not comply with psr-4 autoloading standard. Skipping. > Illuminate\Foundation\ComposerScripts::postAutoloadDump > @php artisan package:discover --ansi

   Error 

  Undefined constant Illuminate\Http\Request::HEADER_X_FORWARDED_ALL
  at C:\wamp64\www\vuexylaravel\vendor\fideloper\proxy\config\trustedproxy.php:48
     44▕      * - 'HEADER_X_FORWARDED_AWS_ELB' (If you are using AWS Elastic Load Balancer)
     45▕      *
     46▕      * @link https://symfony.com/doc/current/deployment/proxies.html
     47▕      */
  ➜  48▕     'headers' => Illuminate\Http\Request::HEADER_X_FORWARDED_ALL,
     49▕
     50▕ ];
     51▕

  1   C:\wamp64\www\vuexylaravel\vendor\laravel\framework\src\Illuminate\Support\ServiceProvider.php:138
      require()

  2   C:\wamp64\www\vuexylaravel\vendor\fideloper\proxy\src\TrustedProxyServiceProvider.php:28
      Illuminate\Support\ServiceProvider::mergeConfigFrom("C:\wamp64\www\vuexylaravel\vendor\fideloper\proxy\config\trustedproxy.php", "trustedproxy")
Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1
laravel-8laravel-9androidhtmlcssimagegoogle-chrome


Solution 1:[1]

The colleague with the answer above is, in principle, right. Only he forgot to mention that after all the changes in the file, you need to delete the package fideloper/proxy:

https://laravel.com/docs/9.x/upgrade

Trusted Proxies

Likelihood Of Impact: Low

If you are upgrading your Laravel 8 project to Laravel 9 by importing your existing application code into a totally new Laravel 9 application skeleton, you may need to update your application's "trusted proxy" middleware.

Within your app/Http/Middleware/TrustProxies.php file, update use Fideloper\Proxy\TrustProxies as Middleware to use Illuminate\Http\Middleware\TrustProxies as Middleware.

Next, within app/Http/Middleware/TrustProxies.php, you should update the $headers property definition:

// Before...
protected $headers = Request::HEADER_X_FORWARDED_ALL;

// After...
protected $headers =
   Request::HEADER_X_FORWARDED_FOR |
   Request::HEADER_X_FORWARDED_HOST |
   Request::HEADER_X_FORWARDED_PORT |
   Request::HEADER_X_FORWARDED_PROTO |
   Request::HEADER_X_FORWARDED_AWS_ELB;

Finally, you can remove the fideloper/proxy Composer dependency from your application:

composer remove fideloper/proxy

Solution 2:[2]

If the above answer does not work for you and you are getting the same error, execute one more line for removing the fideloper/proxy from composer.json.

// Before...
protected $headers = Request::HEADER_X_FORWARDED_ALL;
 
// After...
protected $headers =
    Request::HEADER_X_FORWARDED_FOR |
    Request::HEADER_X_FORWARDED_HOST |
    Request::HEADER_X_FORWARDED_PORT |
    Request::HEADER_X_FORWARDED_PROTO |
    Request::HEADER_X_FORWARDED_AWS_ELB;

This will remove the proxy from the composer.json and the exception will be gone.

composer remove fideloper/proxy

it's properly mentioned in the laravel 9 upgrade guide. https://laravel.com/docs/9.x/upgrade#the-assert-deleted-method

Solution 3:[3]

If you are upgrading your Laravel 8 project to Laravel 9 by importing your existing application code into a totally new Laravel 9 application skeleton, I tried this solution below.

a) I fixed it by deleting "config/trustedproxy.php". I did not have the TrustProxies middleware on the directory at app\Http\Middleware on my side

Solution 4:[4]

Two things I did after following the laravel upgrade doc which worked for me:

  1. Manually go into composer.json and remove the fideloper/proxy

Run composer update. If you still get the issue. Follow next:

  1. Check if this file TrustProxies.php is present located at vendor\laravel\framework\src\Illuminate\Http\Middleware\TrustProxies.php if Not you can copy from old one.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Николай
Solution 2 HadiNiazi
Solution 3
Solution 4 Prosper

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