Brotli/gzip/deflate support for Laravel Vapor

CompressedResponse.php

<?php



namespace App\Http\Middleware;

use Closure;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

class CompressedResponse
{
    public function handle(Request $request, Closure $next)
    {
        $response = $next($request);

        // Most common methods for HTTP compression, from highest to lowest compression
        $methods = [
            'br' => [
                'function' => 'brotli_compress',
                'compression_level' => config('app.brotli_compression_level', 0),
            ],
            'gzip' => [
                'function' => 'gzencode',
                'compression_level' => config('app.gzip_compression_level', 9),
            ],
            'deflate' => [
                'function' => 'gzdeflate',
                'compression_level' => config('app.deflate_compression_level', 9),
            ]
        ];

        // Try all methods in order
        foreach ($methods as $method => $method_data) {
            if (in_array($method, $request->getEncodings()) && function_exists($method_data['function'])) {
                try {
                    // Call compression function
                    $response->setContent(
                        $method_data['function'](
                            $response->getContent(),
                            $method_data['compression_level']
                        )
                    );

                    // Set headers for content encoding and binary response
                    // https://docs.vapor.build/1.0/projects/development.html#binary-responses
                    $response->headers->add([
                        'Content-Encoding' => $method,
                        'X-Vapor-Base64-Encode' => 'True',
                    ]);

                    return $response;
                } catch (\Exception $e) {
                    Log::warning('Compression using ' . $method . ' failed: ' . $e->getMessage());
                }
            }
        }

        // Return response if no compatible compression method was found, but log just in case
        Log::warning('No compression method found for encodings [' . implode(', ', $request->getEncodings()) . '] for request: ' . $request->getRequestUri());

        return $response;
    }
}