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A Symfony Bundle for managing robots.txt files with a multi-provider architecture, allowing flexible assembly and generation of robots.txt content.

Features
Installation
Requirements
Configuration
Usage
- Basic Usage
- Creating Custom Providers
API Reference
Advanced Usage
- Dynamic Rules
- Conditional Providers
Testing
Contributing
License

Features

🤖 Complete robots.txt support: Support for all standard directives (User-agent, Allow, Disallow, Crawl-delay, Sitemap, etc.)
🔌 Multi-provider architecture: Collect rules from multiple sources by implementing RobotsTxtProviderInterface
🎯 Priority control: Support provider priority to flexibly control rule merging order
🌍 Environment support: Provide different robots.txt content based on different environments
⚡ Performance optimization: Built-in caching strategy to reduce server load
📖 Standards compliant: Follows Google robots.txt specification
🔧 Auto-configuration: Providers are automatically registered using Symfony's autoconfiguration

Installation

composer require tourze/robots-txt-bundle

Requirements

PHP 8.1 or higher
Symfony 6.4 or higher

Configuration

The Bundle works out of the box with minimal configuration. The /robots.txt route is automatically registered and will collect content from all registered providers.

Custom Configuration

If you need to customize the Bundle behavior, create a configuration file:

# config/packages/robots_txt.yaml
robots_txt:
    cache_enabled: true
    cache_ttl: 3600

Usage

Basic Usage

The Bundle automatically registers a /robots.txt route that returns the generated robots.txt content.

Creating Custom Providers

<?php

namespace App\Provider;

use Tourze\RobotsTxtBundle\Provider\RobotsTxtProviderInterface;
use Tourze\RobotsTxtBundle\Model\RobotsTxtEntry;
use Tourze\RobotsTxtBundle\Model\RobotsTxtRule;
use Tourze\RobotsTxtBundle\Model\RobotsTxtDirective;

class CustomRobotsTxtProvider implements RobotsTxtProviderInterface
{
    public function provide(): RobotsTxtEntry
    {
        $entry = new RobotsTxtEntry();

        // Add comments
        $entry = $entry->withComment('Custom robots.txt rules');

        // Disallow all crawlers from accessing admin areas
        $adminRule = RobotsTxtRule::forAllAgents([
            RobotsTxtDirective::disallow('/admin/'),
            RobotsTxtDirective::disallow('/private/'),
        ]);
        $entry = $entry->withRule($adminRule);

        // Set special rules for Googlebot
        $googlebotRule = RobotsTxtRule::forAgent('Googlebot', [
            RobotsTxtDirective::allow('/api/public/'),
            RobotsTxtDirective::crawlDelay(1),
        ]);
        $entry = $entry->withRule($googlebotRule);

        // Add sitemap
        $entry = $entry->withSitemap('https://example.com/sitemap.xml');

        return $entry;
    }

    public function getPriority(): int
    {
        return 100; // High priority
    }

    public function supports(): bool
    {
        // Only enable in production environment
        return ($_ENV['APP_ENV'] ?? 'prod') === 'prod';
    }
}

Providers are automatically registered without additional configuration.

API Reference

RobotsTxtDirective

Create individual robots.txt directives:

// Disallow directive
RobotsTxtDirective::disallow('/admin/');

// Allow directive
RobotsTxtDirective::allow('/public/');

// Crawl-delay directive
RobotsTxtDirective::crawlDelay(10);

// Sitemap directive
RobotsTxtDirective::sitemap('https://example.com/sitemap.xml');

// Custom directive
new RobotsTxtDirective('Custom-directive', 'value');

RobotsTxtRule

Create rule groups for specific User-agents:

// For all crawlers
RobotsTxtRule::forAllAgents([
    RobotsTxtDirective::disallow('/admin/'),
]);

// For specific crawlers
RobotsTxtRule::forAgent('Googlebot', [
    RobotsTxtDirective::allow('/api/'),
    RobotsTxtDirective::crawlDelay(1),
], 100); // Priority

RobotsTxtEntry

Complete robots.txt entry:

$entry = new RobotsTxtEntry();
$entry = $entry->withComment('Generated robots.txt')
               ->withRule($rule)
               ->withSitemap('https://example.com/sitemap.xml');

Advanced Usage

Dynamic Rules

class DynamicRobotsTxtProvider implements RobotsTxtProviderInterface
{
    public function __construct(
        private UserRepository $userRepository
    ) {}

    public function provide(): RobotsTxtEntry
    {
        $entry = new RobotsTxtEntry();
        
        // Dynamically generate rules based on user data
        $users = $this->userRepository->findPublicUsers();
        foreach ($users as $user) {
            $entry = $entry->withRule(
                RobotsTxtRule::forAllAgents([
                    RobotsTxtDirective::allow("/users/{$user->getId()}/")
                ])
            );
        }

        return $entry;
    }
}

Conditional Providers

class ConditionalRobotsTxtProvider implements RobotsTxtProviderInterface
{
    public function supports(): bool
    {
        // Only enable under specific conditions
        return $_ENV['ENABLE_SEO'] === 'true' && 
               $_ENV['APP_ENV'] === 'prod';
    }
}

Testing

./vendor/bin/phpunit packages/robots-txt-bundle/tests

Contributing

Please see CONTRIBUTING.md for details on how to contribute to this project.

License

MIT License - Please see LICENSE file for more information.

tourze / robots-txt-bundle

Maintainers

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