Oleg Proskurin
ca112886e5
Implement cached generation endpoint that streams image bytes directly with intelligent caching based on prompt hashing for optimal performance. **Core Service:** - **PromptCacheService**: Prompt-based cache management - SHA-256 hashing of prompts for cache lookup - Cache hit/miss tracking with statistics - Support for cache entry creation and retrieval - Hit count and last accessed timestamp tracking - Cache statistics per project **v1 API Routes:** - `GET /api/v1/live/generate` - Generate with caching, stream image bytes **Endpoint Features:** - Prompt-based caching with SHA-256 hashing - Cache HIT: Streams existing image with X-Cache-Status: HIT header - Cache MISS: Generates new image, caches it, streams with X-Cache-Status: MISS - Direct image byte streaming (not JSON response) - Cache-Control headers for browser caching (1 year max-age) - Hit count tracking for cache analytics - Integration with promptUrlCache database table **Caching Logic:** - Compute SHA-256 hash of prompt for cache key - Check cache by promptHash and projectId - On HIT: Fetch image from database, download from storage, stream bytes - On MISS: Generate new image, create cache entry, stream bytes - Record cache hits with incremented hit count **Response Headers:** - Content-Type: image/jpeg (or appropriate MIME type) - Content-Length: Actual byte length - Cache-Control: public, max-age=31536000 (1 year) - X-Cache-Status: HIT | MISS - X-Cache-Hit-Count: Number of cache hits (on HIT) - X-Generation-Id: UUID (on MISS) - X-Image-Id: UUID (always) **Technical Notes:** - Uses ImageService to fetch cached images by ID - Uses StorageFactory to download image buffers from MinIO - Parses storage keys to extract org/project/category/filename - Validates storage key format before download - All Phase 5 code is fully type-safe with zero TypeScript errors 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> |
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