f244d9c7e0
Add per-host connection limits for upstream fetching
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- Add upstream_connections_per_host config option (default: 20)
- Implement per-host semaphores to limit concurrent connections
- Semaphore released when response body is closed
- Prevents overwhelming origin servers with parallel requests
2026-01-08 05:19:20 -08:00
6304556837
Refactor to serve all responses from cached files on disk
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- StoreOutput now returns output hash for immediate retrieval
- Cache misses now serve from disk file after storing (same as hits)
- Log served_bytes from actual io.Copy result (avoids stat calls)
- Remove ContentLength field usage for cache hits (stream from file)
- Fix tests to properly check all return values
2026-01-08 05:11:55 -08:00
1a97f42cd8
Add detailed logging for image requests with cache status and timing
2026-01-08 05:04:08 -08:00
fd2d108f9c
Wire up image handler endpoint with service orchestration
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- Add image proxy config options (signing_key, whitelist_hosts, allow_http)
- Create Service to orchestrate cache, fetcher, and processor
- Initialize image service in handlers OnStart hook
- Implement HandleImage with URL parsing, signature validation, cache
- Implement HandleRobotsTxt for search engine prevention
- Parse query params for signature, quality, and fit mode
2026-01-08 04:01:53 -08:00
5462c9222c
Add pure Go image processor with resize and format conversion
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Implements the Processor interface using disintegration/imaging library.
Supports JPEG, PNG, GIF, WebP decoding and JPEG, PNG, GIF encoding.
Includes all fit modes: cover, contain, fill, inside, outside.
2026-01-08 03:54:50 -08:00
9629139989
Add tests for cache service
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Tests cover: lookup miss/hit, store source/output, negative caching,
negative cache expiry, hot cache, output retrieval, stats, and cleanup.
2026-01-08 03:39:23 -08:00
6d32b7ee23
Fix formatting in fetcher and signature tests
2026-01-08 03:36:00 -08:00
30c5c077e5
Add cache service with hot cache and negative caching
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Implements cache lookup with in-memory hot path, source/output storage,
negative caching for failed fetches, TTL expiration, and statistics tracking.
2026-01-08 03:35:55 -08:00
2f20c71da0
Add content-addressable storage and cache key generation
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ContentStorage stores blobs at <dir>/<ab>/<cd>/<sha256> paths.
MetadataStorage stores JSON at <dir>/<host>/<path_hash>.json.
CacheKey generates unique keys from request parameters.
2026-01-08 03:35:50 -08:00
30d63e80dc
Add magic byte detection for image format validation
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Implements format detection by checking file magic bytes for JPEG, PNG,
GIF, WebP, AVIF, and SVG. Includes validation against declared Content-Type.
2026-01-08 03:35:29 -08:00
cc2c40bfbf
Implement HMAC-SHA256 signature generation and verification
2026-01-08 03:02:09 -08:00
2b0ccd6052
Implement host whitelist for source domains
2026-01-08 03:00:53 -08:00
018c280267
Add ParseImagePath for chi wildcard and upstream fetcher with SSRF protection
2026-01-08 02:59:48 -08:00
c69ddf6f61
Implement URL parser for image proxy routes
2026-01-08 02:55:05 -08:00
827f9743b8
Add package and const block comments to imgcache
2026-01-08 02:29:25 -08:00
ef6e67e786
Add blank line before return in SourceURL
2026-01-08 02:23:23 -08:00
516853626d
Add basic webserver skeleton with healthcheck
2026-01-08 02:20:23 -08:00
