Release Date

December 2025

Description

The Image Optimize - Thumbor module provides seamless integration with the Thumbor image optimization service for the Image Optimize pipeline system in Drupal. This module enables real-time image optimization and transformation using Thumbor as a dedicated processor within Image Optimize pipelines, with native support for Thumbor filesystem storage configurations.

Compatibility

Drupal Core: 8.x, 9.x, 10.x, 11.x
PHP: 7.4+ (recommended 8.0+)
Thumbor: Compatible with filesystem-based Thumbor installations
Dependencies:
- Image Optimize (drupal.org/project/imageapi_optimize)
- Drupal Core Image module

Key Features in v1.0.0

✅ Official first release
✅ Full Thumbor integration with Image Optimize pipelines
✅ Custom ImageAPIOptimizeProcessor plugin for Thumbor
✅ Dedicated image effect plugin for simplified configuration
✅ Centralized ThumborService for URL generation and management
✅ Full support for Thumbor filesystem-based storage
✅ URL signature generation with optional Security Key authentication
✅ Native integration with Drupal image styles
✅ Operations string building from image style effects (resize, format conversion, etc.)
✅ Automatic path resolution for filesystem Thumbor configurations
✅ Web-accessible path generation for images in Drupal's public file directory

Installation

Download the module from drupal.org
Extract to /modules/custom/ (or /modules/contrib/)
Enable via admin UI (/admin/modules) or CLI:
```
drush en imageapi_optimize_thumbor
```
Clear Drupal cache

Configuration

Basic Setup

Navigate to Administration » Configuration » Media » Image Optimize pipelines (/admin/config/media/image_optimize)
Create a new pipeline or edit an existing one
Add a new Thumbor processor
Configure the following fields:
- Thumbor Server URL: e.g., http://thumbor.example.com or https://thumbor.example.com
- Security Key (optional): Required if your Thumbor server has authentication enabled

Thumbor Filesystem Configuration

This module is designed to work with filesystem-based Thumbor installations. The module automatically:

Resolves image URIs from Drupal's public file directory
Generates proper relative paths for Thumbor to access files via the filesystem
Constructs web-accessible paths compatible with Thumbor's storage configuration

Example Thumbor Setup (filesystem-based):

Thumbor Server URL: http://thumbor.internal.local:8888
Images stored in: /var/www/shared/files/ (accessible via http://thumbor.internal.local:8888/sites/default/files/)
Drupal files directory: /var/www/html/sites/default/files

The module automatically maps Drupal image URIs (e.g., public://images/photo.jpg) to the correct filesystem paths that Thumbor expects.

Image Style Configuration

Configure image effects (scale, crop, format conversion) as usual
The module automatically converts these to Thumbor operations:
- image_scale → fit-in/WxH
- image_scale_and_crop → WxH
- image_convert → filters:format(webp)

URL Generation & Security

Without Security Key (Unsafe Mode)

http://thumbor.example.com/unsafe/300x200/sites/default/files/images/photo.jpg

With Security Key (Signed URLs)

http://thumbor.example.com/SIGNATURE/300x200/sites/default/files/images/photo.jpg

Uses HMAC-SHA1 signature generation
Base64 URL-safe encoding for compatibility

System Requirements

Active Thumbor server (filesystem-based or compatible)
Network connectivity from Drupal server to Thumbor server
Image Optimize module installed and enabled
Public file directory accessible to Thumbor via configured storage path
Proper file permissions for Thumbor to read image files

Security Considerations

Always configure a Security Key in production environments
Ensure Thumbor URL is only accessible from trusted networks/servers
Test connectivity between Drupal and Thumbor before deploying to production
Monitor Thumbor logs for unauthorized requests
Keep Thumbor and Drupal servers synchronized regarding file paths

Architecture

Components

ThumborProcessor Plugin: Implements the Image Optimize processor interface
ThumborService: Central service for URL generation and configuration management
ThumborImageEffect: Direct image style effect for standalone usage
Configuration Schema: YAML-based configuration validation

Request Flow

Image style with Thumbor processor is applied
Module detects Thumbor processor in pipeline or image effect
ThumborService resolves image URI to filesystem path
Operations string is built from image effects
Thumbor URL is generated with optional signature
URL is returned without modifying the original file

Troubleshooting

Common Issues

Thumbor URL returns 404: Verify Thumbor server URL is correct and accessible
Image not found errors: Check file permissions and Thumbor storage configuration
Signature errors: Ensure Security Key matches between Drupal and Thumbor configuration
Path resolution errors: Verify Drupal's public file directory is accessible to Thumbor

Support & Reporting

Project Page: https://drupal.org/project/imageapi_optimize_thumbor
Issue Queue: https://drupal.org/project/issues/imageapi_optimize_thumbor
Documentation: See included README.md

Changelog

1.0.0 (December 2025)
- Initial official release
- Full Thumbor integration for Image Optimize pipelines
- Filesystem-based Thumbor configuration support
- ImageAPIOptimizeProcessor plugin implementation
- ThumborService for centralized URL management
- HMAC-SHA1 signature generation with Security Key support
- Operations string builder for image effects
- Complete configuration schema
- Support for Drupal 8, 9, 10, 11

Roadmap (Future Enhancements)

Advanced Thumbor filters and effects support
Image transformation caching layer
Request monitoring and analytics
Additional storage backend support (S3, etc.)
WebP and AVIF format detection
Batch image optimization utilities

Author & Maintenance

Module maintained by the Drupal community. Contributions welcome!

Version	Type	Release date
1.0.1	Stable	Dec 3, 2025
1.0.0	Stable	Dec 1, 2025

Image Optimize - Thumbor