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TinyProxy 2.0 - Implementation Roadmap

Project: TinyProxy Complete Overhaul
Version: 2.0.0
Start Date: March 30, 2026
Estimated Completion: April 27, 2026 (4 weeks)

📅 Week-by-Week Implementation Schedule

Week 1: Foundation & Security (Mar 30 - Apr 5)

Day 1-2: Project Structure Setup

  • Create new directory structure
  • Update composer.json with new dependencies
  • Run composer install
  • Create .env.example file
  • Set up PSR-4 autoloading
  • Create base exception classes
  • Set up PHPUnit configuration
  • Set up PHPStan configuration
  • Create basic bootstrap file

Deliverable: New project structure with dependencies installed

Day 3-4: Core Infrastructure

  • Implement DI Container (src/Container.php)
  • Implement Configuration system (src/Config/)
    • Configuration.php
    • ConfigValidator.php
    • Environment.php
  • Implement Bootstrap.php
  • Create Application entry point
  • Implement base Response class
  • Create utility helpers (UrlHelper, FileHelper, TimeHelper)

Deliverable: Core framework components ready

Day 5-7: Security Implementation (CRITICAL)

  • Implement UrlValidator (src/Security/UrlValidator.php)
    • Block private IP ranges
    • Block localhost
    • Block cloud metadata endpoints
    • Domain whitelist/blacklist
    • Unit tests for UrlValidator
  • Implement RateLimiter (src/Security/RateLimiter.php)
    • Sliding window algorithm
    • APCu storage backend
    • Per-IP and per-key limits
    • Unit tests for RateLimiter
  • Implement AccessControl (src/Security/AccessControl.php)
    • API key authentication
    • JWT token support
    • Unit tests for AccessControl
  • Implement Authenticator (src/Security/Authenticator.php)
  • Implement TokenGenerator (src/Security/TokenGenerator.php)

Deliverable: Security layer complete with tests

Week 2: Core Refactoring & Caching (Apr 6 - Apr 12)

Day 8-9: Logging System

  • Create LoggerInterface (src/Logger/LoggerInterface.php)
  • Implement FileLogger (src/Logger/FileLogger.php)
  • Implement RequestLogger (src/Logger/RequestLogger.php)
  • Implement LogManager with log rotation
  • Unit tests for logging components

Deliverable: Complete logging system

Day 10-12: Enhanced Cache System

  • Create CacheInterface (src/Cache/CacheInterface.php)
  • Create CachedContent value object (src/Cache/CachedContent.php)
  • Implement FileCache (src/Cache/FileCache.php)
    • File-based storage with compression
    • Metadata tracking
  • Implement LRUEvictionStrategy (src/Cache/LRUEvictionStrategy.php)
  • Implement CacheManager (src/Cache/CacheManager.php)
    • Size limit enforcement
    • LRU eviction
    • Statistics tracking
    • Selective clearing (by pattern, domain, age)
  • Implement CacheStats (src/Cache/CacheStats.php)
  • Unit tests for all cache components

Deliverable: Production-ready cache system

Day 13-14: HTTP Client & Request Handling

  • Implement Client (src/Http/Client.php)
    • Guzzle wrapper with security checks
    • Timeout handling
    • Retry logic
  • Implement Request (src/Http/Request.php)
  • Implement RequestValidator (src/Http/RequestValidator.php)
  • Implement ResponseBuilder (src/Http/ResponseBuilder.php)
  • Unit tests for HTTP components

Deliverable: Secure HTTP client layer

Week 3: Core Services & API (Apr 13 - Apr 19)

Day 15-17: Migrate Core Services

  • Create ModifierInterface (src/Modifier/ModifierInterface.php)
  • Refactor HtmlModifier (src/Modifier/HtmlModifier.php)
    • Add type hints
    • Use DI for dependencies
    • Implement ModifierInterface
    • Unit tests
  • Refactor CssModifier (src/Modifier/CssModifier.php)
    • Add type hints
    • Use DI for dependencies
    • Implement ModifierInterface
    • Unit tests
  • Refactor AdBlocker (src/Modifier/AdBlocker.php)
    • Add type hints
    • Improve regex patterns
    • Unit tests
  • Implement ContentFilter (src/Modifier/ContentFilter.php)
  • Implement ImageOptimizer (src/Modifier/ImageOptimizer.php)

Deliverable: All content modifiers refactored

Day 18-19: ProxyService Refactoring

  • Refactor ProxyService (src/Core/ProxyService.php)
    • Use DI for all dependencies
    • Add strict types
    • Add type hints on all methods
    • Implement proper error handling
    • Use new security validators
    • Use new cache system
    • Use new HTTP client
    • Add streaming support for large files
  • Create Router (src/Core/Router.php)
  • Update public/index.php to use new structure
  • Integration tests for ProxyService

Deliverable: Core proxy service refactored

Day 20-21: API Infrastructure

  • Create JsonResponse (src/Api/Response/JsonResponse.php)
  • Create base ApiController (src/Api/Controller/ApiController.php)
  • Implement AuthMiddleware (src/Api/Middleware/AuthMiddleware.php)
  • Implement RateLimitMiddleware (src/Api/Middleware/RateLimitMiddleware.php)
  • Implement CorsMiddleware (src/Api/Middleware/CorsMiddleware.php)
  • Create API entry point (public/api.php)
  • Set up route configuration (config/routes.php)

Deliverable: API infrastructure ready

Week 4: API, Dashboard & Testing (Apr 20 - Apr 26)

Day 22-23: API Controllers

  • Implement HealthController (src/Api/Controller/HealthController.php)
    • GET /api/health
  • Implement StatsController (src/Api/Controller/StatsController.php)
    • GET /api/stats
    • GET /api/stats/cache
    • GET /api/stats/requests
  • Implement CacheController (src/Api/Controller/CacheController.php)
    • GET /api/cache
    • GET /api/cache/:key
    • DELETE /api/cache/:key
    • POST /api/cache/clear
    • POST /api/cache/clear/:pattern
  • Implement LogController (src/Api/Controller/LogController.php)
    • GET /api/logs
    • GET /api/logs/:type
  • Integration tests for all API endpoints

Deliverable: Complete REST API

Day 24-25: Statistics & Admin Dashboard Backend

  • Implement StatsCollector (src/Statistics/StatsCollector.php)
  • Implement MetricsStore (src/Statistics/MetricsStore.php)
  • Implement StatsAggregator (src/Statistics/StatsAggregator.php)
  • Implement DashboardController (src/Admin/DashboardController.php)
  • Implement CacheViewController (src/Admin/CacheViewController.php)
  • Implement LogViewController (src/Admin/LogViewController.php)

Deliverable: Backend for admin dashboard

Day 26-27: Admin Dashboard Frontend

  • Create admin dashboard HTML (public/admin/index.html)
  • Implement authentication UI (login form)
  • Create dashboard overview page
    • Real-time statistics display
    • Request volume charts (Chart.js)
    • System health indicators
  • Create cache management page
    • Cache browser with search
    • Entry inspector
    • Clear cache controls
  • Create log viewer page
    • Log filtering
    • Real-time log streaming
  • Create configuration editor page
  • Create domain management page
  • Implement JavaScript API client (public/admin/js/app.js)
  • Styling (public/admin/css/admin.css)

Deliverable: Fully functional admin dashboard

Day 28: Comprehensive Testing

  • Write unit tests for all remaining components
  • Write integration tests
    • Full proxy request flow
    • Cache behavior
    • Content modification
    • API endpoints
  • Write security tests
    • SSRF prevention
    • XSS prevention
    • Rate limiting
    • Authentication
  • Run PHPStan level 8 analysis
  • Run PHP CodeSniffer (PSR-12)
  • Fix all issues found
  • Measure test coverage (target: >80%)

Deliverable: Test suite with >80% coverage

Week 5: Polish & Documentation (Apr 27)

Day 29: Performance Optimization

  • Implement HTTP caching headers (ETag, Last-Modified)
  • Add content compression (gzip/deflate)
  • Optimize cache file operations
  • Add OPcache configuration
  • Performance benchmarking
  • Optimize database queries (if applicable)
  • Add cache preloading for popular sites

Deliverable: Performance optimizations complete

Day 30: Documentation & Deployment

  • Update README.md
    • New installation instructions
    • Configuration guide
    • Usage examples
    • Docker deployment
  • Create ARCHITECTURE.md
    • System architecture diagram
    • Component interaction flow
    • Class diagrams
  • Create API.md
    • Complete API reference
    • Authentication guide
    • Code examples
  • Create CHANGELOG.md
    • Version 2.0.0 changes
    • Breaking changes
    • Migration guide from 1.x
  • Create CONTRIBUTING.md
  • Create SECURITY.md
  • Update LICENSE (keep MIT)
  • Create Docker Compose configuration
  • Create deployment scripts

Deliverable: Complete documentation

📦 Deliverables Checklist

Phase 1: Foundation ✅

  • New directory structure
  • PSR-4 autoloading
  • Composer dependencies installed
  • DI Container
  • Configuration system
  • Bootstrap & Application
  • Utility helpers

Phase 2: Security (CRITICAL) ✅

  • UrlValidator with SSRF prevention
  • RateLimiter with APCu
  • AccessControl with API keys & JWT
  • Security tests passing

Phase 3: Core Systems ✅

  • Logging system
  • Enhanced cache with LRU
  • HTTP client wrapper
  • Request/Response handling

Phase 4: Service Migration ✅

  • All modifiers refactored
  • ProxyService refactored
  • Integration tests passing

Phase 5: API ✅

  • All API endpoints implemented
  • Middleware stack complete
  • API tests passing
  • API documentation

Phase 6: Admin Dashboard ✅

  • Backend controllers
  • Statistics collection
  • Frontend UI complete
  • Authentication flow

Phase 7: Testing ✅

  • Unit tests >80% coverage
  • Integration tests
  • Security tests
  • PHPStan level 8 passing
  • PSR-12 compliance

Phase 8: Documentation ✅

  • README.md updated
  • ARCHITECTURE.md created
  • API.md created
  • CHANGELOG.md created
  • CONTRIBUTING.md created

🚧 Risk Management

High-Risk Items

  1. SSRF Prevention: Must be thoroughly tested with edge cases
  2. Rate Limiting: Need to handle distributed scenarios
  3. Cache Migration: Ensure backward compatibility with existing cache
  4. Performance: Large file streaming must not degrade performance

Mitigation Strategies

  1. Extensive security testing with automated tools
  2. Feature flags for gradual rollout
  3. Parallel running of old and new code
  4. Performance benchmarking at each phase
  5. Regular code reviews

📊 Progress Tracking

Use this section to track progress:

Legend:
[ ] Not started
[~] In progress
[x] Complete
[!] Blocked

Current Status (Week 1, Day 1)

  • REFACTORING_PLAN.md created
  • IMPLEMENTATION_ROADMAP.md created
  • Directory structure created
  • Composer updated

Blockers

None currently

Notes

  • Starting implementation on March 30, 2026
  • Using PHP 8.5.4
  • Target completion: April 27, 2026

🎯 Success Metrics

Code Quality

  • ✅ Test coverage: >80%
  • ✅ PHPStan: Level 8 passing
  • ✅ PSR-12: 100% compliant
  • ✅ No critical security vulnerabilities

Performance

  • ✅ Cache hit rate: >70%
  • ✅ Response time (cached): <100ms
  • ✅ Memory per request: <64MB
  • ✅ Throughput: >1000 req/sec (cached)

Features

  • ✅ All planned features implemented
  • ✅ API fully functional
  • ✅ Admin dashboard operational
  • ✅ Security hardening complete

📞 Communication Plan

Daily

  • Update progress tracking section
  • Log any blockers
  • Update task status

Weekly

  • Review completed tasks
  • Assess if on track
  • Adjust timeline if needed

Milestones

  • End of Week 1: Security complete
  • End of Week 2: Core refactoring complete
  • End of Week 3: API & services complete
  • End of Week 4: Testing & documentation complete

🔄 Version Control Strategy

Branching

  • main - Production-ready code
  • develop - Development branch
  • feature/* - Feature branches
  • hotfix/* - Emergency fixes

Commit Convention

type(scope): description

[optional body]
[optional footer]

Types: feat, fix, docs, style, refactor, test, chore

Examples:

feat(security): implement SSRF prevention in UrlValidator
fix(cache): resolve memory leak in LRU eviction
docs(api): add authentication examples to API.md
test(security): add rate limiter edge case tests
refactor(proxy): extract content processing to separate class

Pull Request Process

  1. Create feature branch from develop
  2. Implement feature with tests
  3. Run all quality checks
  4. Create PR with description
  5. Code review
  6. Merge to develop
  7. After testing, merge to main

✅ Definition of Done

A task is considered complete when:

  • Code is written and follows PSR-12
  • All tests are passing (unit + integration)
  • PHPStan analysis passes (level 8)
  • Code is documented (PHPDoc on public methods)
  • Code is reviewed (if team environment)
  • No known bugs or security issues
  • Performance benchmarks meet targets

🎉 Launch Checklist

Before deploying version 2.0:

  • All tests passing
  • Security audit complete
  • Performance benchmarks met
  • Documentation complete
  • Migration guide written
  • Deployment scripts tested
  • Backup and rollback plan ready
  • Monitoring and alerting configured
  • Load testing completed
  • Security scanning passed (OWASP ZAP, etc.)

Last Updated: March 30, 2026
Status: Ready to begin implementation
Current Phase: Week 1, Day 1 - Project Structure Setup