csuntechlab / laravel-4-proxypass

Composer package for Laravel 4 that resolves the correct absolute URLs when behind a proxy

Laravel 4 Proxy Pass

NOTE: If you are looking for the Proxy Pass package for Laravel 5.0 and up, you'll want to visit https://github.com/csun-metalab/laravel-proxypass instead.

Composer package for Laravel 4 that resolves the correct absolute URLs when behind a proxy

This package is built for version 4.2 of Laravel. It modifies the functionality of the url(), asset(), and other helper methods.

To install from Composer, use the following command:

composer require csun-metalab/laravel-4-proxypass

Installation

First, add the following lines to your .env.php file to leverage the proxy attributes:

'PROXY_ACTIVE' => true,
'PROXY_PATH_HEADER' => 'HTTP_X_FORWARDED_PATH',

You may also add the following optional lines to your .env.php file to leverage the ability to FORCE the URL and schema without having to pass through a load balancer or proxy:

# http or https: PUBLIC_SCHEMA_OVERRIDE=https
'PUBLIC_SCHEMA_OVERRIDE' => '',

# Example: PUBLIC_URL_OVERRIDE=http://some-other-domain.example.com/some-other-directory
'PUBLIC_URL_OVERRIDE' => '',

Next, add the service provider to your providers array in Laravel as follows:

'providers' => [
   //...

   CSUNMetaLab\ProxyPass4\Providers\ProxyPassServiceProvider::class,

   // You can also use the following depending on Laravel convention:
   // 'CSUNMetaLab\ProxyPass4\Providers\ProxyPassServiceProvider',

   //...
],

Finally, run the following Artisan command to publish the configuration:

php artisan config:publish csun-metalab/laravel-4-proxypass

Environment Variables

The two environment variables you added to your .env.php file are the following:

PROXY_ACTIVE

Set this to true to enable the proxying functionality or false to disable it.

PROXY_PATH_HEADER

This is the PHP-interpreted value of the request header sent from your proxy. The default is HTTP_X_FORWARDED_PATH (the computed value of X-Forwarded-Path)

Trusted Proxies

This package also has the ability to allow only certain proxy servers to modify the necessary values in order to set the proper absolute URL.

By default, all proxy servers are allowed to modify the values; if, however, the following value is set in your .env.php file then you can create a whitelist of proxies:

TRUSTED_PROXIES

This is a comma-delimited list of hostnames/IP addresses that are allowed to perform proxying functions.

'TRUSTED_PROXIES' => '192.168.1.10,www.example.com,192.168.3.12',

The above example would allow the following three proxy servers to provide proxying functionality:

• 192.168.1.10 (would come from the REMOTE_ADDR value in PHP)
• www.example.com (would come from the X-Forwarded-Server header from the web server)
• 192.168.3.12 (would come from the REMOTE_ADDR value in PHP)

Usage Example

Let's say you have an application hosted at http://laravel.example.com but that is not the location you want to show to the world. Instead, you want to show a URL of http://www.example.com/laravel so you place your Laravel application behind a proxy.

However, you notice that while the front page loads properly, none of the URLs you have written with the url(), asset(), or other helpers work with that URL and instead continue writing http://laravel.example.com as their base path.

You can configure your proxy to add a request header along with your ProxyPass and ProxyPassReverse directives in Apache (ensure you have mod_headers enabled and mod_proxy enabled as well):

ProxyPass        /laravel http://laravel.example.com
ProxyPassReverse /laravel http://laravel.example.com

<Location /laravel>
RequestHeader set X-Forwarded-Path "http://www.example.com/laravel"
</Location>

Now all of your URLs using the url(), asset(), and other helpers will be written correctly!