Commit Graph

70 Commits

Author SHA1 Message Date
615586fcea Add failing test for AVIF decoding
Test verifies that AVIF images can be decoded and processed.
Currently fails because AVIF decoding is not implemented.
2026-01-08 13:09:40 -08:00
9bfae69ccf Fix logging: add response_bytes to middleware, cache_key to handler
- Middleware now tracks and logs bytes written via response_bytes
- Handler logs cache_key for cache hit debugging
- Changed "served encrypted image" to "image served" (only URL is encrypted)
2026-01-08 13:05:10 -08:00
e5135b3697 Add 1-minute expiration option and quality presets to URL generator
Quality is now a dropdown with named presets:
- Potato (25), Low (50), Medium (70), High (85), Ultra (100)

Added 1-minute TTL option for testing short-lived URLs.
2026-01-08 12:52:14 -08:00
77c6744383 Add upstream connection info and download metrics to logging
- Capture TLS version, cipher suite, HTTP version, and remote addr
- Add download bitrate using go-humanize SI formatting
- Use consistent WxH format for dimensions (not struct notation)
- Rename input/output to src/dst for consistency
- Add separate "upstream fetched" log with connection details
2026-01-08 12:47:31 -08:00
7d0ac0a139 Remove Buildarch from ldflags, use runtime.GOARCH instead
The architecture is available at runtime via stdlib, no need to bake
it in at build time.
2026-01-08 12:38:24 -08:00
15d9439e3d Add fetch/conversion metrics and improve logging
FetchResult now includes:
- StatusCode: HTTP status from upstream
- FetchDurationMs: time to fetch from upstream
- RemoteAddr: upstream server address

SourceMetadata now stores:
- ContentLength: size from upstream
- FetchDurationMs: fetch timing
- RemoteAddr: for debugging

Image conversion log now includes:
- host: source hostname (was missing)
- path: source path (renamed from file)
- convert_ms: image processing time
- quality: requested quality setting
- fit: requested fit mode
2026-01-08 12:34:26 -08:00
4426387d1c Fix hot cache to include ContentType and SizeBytes
Hot cache entries now store all data needed to serve a cache hit
without any database access:
- OutputHash (for file lookup)
- ContentType (for Content-Type header)
- SizeBytes (for Content-Length header)

Previously hot cache only stored OutputHash, causing empty
Content-Type headers on cached WebP responses.
2026-01-08 12:28:17 -08:00
51a1ae4a13 Add failing test for hot cache ContentType
Hot cache lookups must return ContentType to serve correct
Content-Type headers. Currently returns empty string.
2026-01-08 12:25:01 -08:00
10b5cc7063 Fix proportional scaling when single dimension is 0
When only width or height is specified (the other being 0), scale the
image proportionally to maintain aspect ratio. Previously, 0 was passed
directly to the resize function which produced a 0x0 image.
2026-01-08 12:20:58 -08:00
817d760b4d Add failing tests for proportional scaling
When only one dimension is provided (e.g., width=400, height=0),
the image should scale proportionally. Currently returns 0x0.
2026-01-08 12:20:19 -08:00
70d55977c0 Add WebP encoding support
Uses github.com/gen2brain/webp - a CGO-free library that uses WASM via
wazero runtime for encoding. WebP decoding was already supported.

- Add gen2brain/webp dependency for encoding
- Implement WebP encoding in processor.go
- Add FormatWebP to SupportedOutputFormats
- Re-enable WebP option in generator form dropdown
- Mark WebP encoding as complete in TODO.md
2026-01-08 11:55:45 -08:00
0c9eb35bd2 Add failing test for WebP encoding support
TDD: This test expects WebP encoding to succeed. It currently fails
because WebP encoding is not implemented (returns ErrUnsupportedOutputFormat).
The test will pass once we add the gen2brain/webp library.
2026-01-08 11:54:03 -08:00
37af10cc2b Update generator form for supported formats and Never expiry
- Remove WebP and AVIF options (encoding not supported)
- Add GIF option (encoding is supported)
- Add 'Never' TTL option as default
2026-01-08 11:08:28 -08:00
b55b75cbe7 Fix silent fallbacks for unsupported formats and fit modes
- Return ErrUnsupportedOutputFormat for WebP/AVIF encoding
- Return ErrInvalidFitMode for unknown fit mode values
- Add ValidateFitMode() for input validation
- Validate fit mode at handler level before processing

Silent fallbacks violate the principle of least surprise and mask bugs.
When a user explicitly specifies a value, we should either honor it or
return an error - never silently substitute a different value.
2026-01-08 11:08:22 -08:00
df6d347e68 Add tests for unsupported output format errors
Tests verify that WebP and AVIF encoding requests return
ErrUnsupportedOutputFormat instead of silently falling back
to a different format.
2026-01-08 11:08:16 -08:00
014c144d73 Add 'Never' expiry option for encrypted URLs
- Make ExpiresAt optional in CBOR (omitempty) for smaller tokens
- Treat ExpiresAt=0 as 'never expires' in parser
- URL-encode token with url.PathEscape() for safety
- Add 'Never' as default TTL option in generator form
2026-01-08 11:08:11 -08:00
b233871241 Add detailed logging for image conversions on cache miss
Log includes:
- file path
- input/output format
- input/output size in bytes
- input/output dimensions
- size ratio (percentage)

Also adds InputWidth, InputHeight, InputFormat to ProcessResult
2026-01-08 10:44:34 -08:00
1f809a6fc9 Implement ETag, HEAD requests, and conditional requests
- Add ETag generation based on output content hash (first 16 chars)
- Add ContentLength to ImageResponse from cache
- Add LoadWithSize method to ContentStorage
- Add GetOutputWithSize method to Cache
- Handle HEAD requests returning headers only
- Handle If-None-Match conditional requests returning 304
- Register HEAD route for image proxy endpoint
2026-01-08 10:08:38 -08:00
4df3e44eff Add failing tests for ETag, HEAD requests, and conditional requests
TDD: Write tests first before implementation for:
- ETag generation and consistency in service layer
- HEAD request support (headers only, no body)
- Conditional requests with If-None-Match header (304 responses)
2026-01-08 10:06:18 -08:00
2e349a8b83 Implement security headers middleware
Adds X-Content-Type-Options, X-Frame-Options, Referrer-Policy,
and X-XSS-Protection headers to all responses.
2026-01-08 10:02:17 -08:00
5de7a26735 Add failing tests for security headers middleware
Tests for X-Content-Type-Options, X-Frame-Options, Referrer-Policy,
X-XSS-Protection headers on responses.
2026-01-08 10:01:36 -08:00
95408e68d4 Implement max input dimensions and path traversal validation
- Reject input images exceeding MaxInputDimension (8192px) to prevent DoS
- Detect path traversal: ../, encoded variants, backslashes, null bytes
2026-01-08 08:50:18 -08:00
c964feac7e Add failing tests for input dimension and path traversal validation
Tests for:
- ErrInputTooLarge when input image exceeds MaxInputDimension
- ErrPathTraversal for ../, encoded traversal, backslashes, null bytes
2026-01-08 08:48:11 -08:00
2cbafe374c Add mock fetcher and service tests for imgcache
Introduces Fetcher interface, mock implementation for testing,
and ApplyMigrations helper for test database setup.
2026-01-08 07:39:18 -08:00
1f0ec59eb5 Wire up auth routes and encrypted URL endpoint
Add session manager and encurl generator to handlers.
Register /, /logout, /generate, /v1/e/{token}, /static/* routes.
2026-01-08 07:38:44 -08:00
08d6e264ed Add auth and encrypted image handlers
Login page, logout, URL generator form, and /v1/e/{token}
endpoint for serving images from encrypted URLs.
2026-01-08 07:38:15 -08:00
aad5e59d23 Add static files and HTML templates for web UI
Embedded Tailwind CSS and login/generator templates.
Self-contained with no external dependencies.
2026-01-08 07:38:09 -08:00
c033e918f0 Add encurl package for encrypted URL tokens
CBOR-encoded payloads with NaCl secretbox encryption.
Supports expiration, image parameters with omitempty defaults.
2026-01-08 07:38:05 -08:00
041b18f651 Add session package for encrypted cookie management
Uses gorilla/securecookie with keys derived via HKDF.
30-day TTL, HttpOnly, Secure, SameSiteStrict cookies.
2026-01-08 07:37:58 -08:00
3f4f345d1c Add seal package for authenticated encryption
Provides HKDF-SHA256 key derivation and NaCl secretbox
(XSalsa20-Poly1305) encryption/decryption utilities.
2026-01-08 07:37:53 -08:00
f244d9c7e0 Add per-host connection limits for upstream fetching
- 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
- 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
6a20406b0f Add -config flag using cobra to specify config file path 2026-01-08 04:58:05 -08:00
9647829ac9 Support YAML list format for whitelist_hosts config 2026-01-08 04:08:51 -08:00
3fcf9d9146 Add failing test for YAML list format in whitelist_hosts config 2026-01-08 04:08:11 -08:00
fd2d108f9c Wire up image handler endpoint with service orchestration
- 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
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
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
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
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
4595929275 Add embedded SQL migrations system
Migrations are stored in schema/*.sql and embedded via go:embed.
Applied migrations are tracked in schema_migrations table.
Initial schema includes source_content, source_metadata, output_content,
request_cache, negative_cache, and cache_stats tables.
2026-01-08 03:35:43 -08:00
30d63e80dc Add magic byte detection for image format validation
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
09a0e6f039 Fix formatting alignment in server constants 2026-01-08 02:31:01 -08:00
1ac16bcfb4 Remove unused respondError function 2026-01-08 02:30:13 -08:00