docs: update README and config to reflect exact-match-only whitelist

Remove suffix match documentation and config comments since whitelist
now only supports exact host matches.

README.md

@@ -98,9 +98,7 @@ expiration 1704067200:
 
 **Whitelist patterns:**
 
-- **Exact match**: `cdn.example.com` — matches only that host
-- **Suffix match**: `.example.com` — matches `cdn.example.com`,
-  `images.example.com`, and `example.com`
+- **Exact match only**: `cdn.example.com` — matches only that host
 
 ### Configuration
 

cmd/pixad/main.go

@@ -17,7 +17,10 @@ import (
 	"sneak.berlin/go/pixa/internal/server"
 )
 
-var Version string //nolint:gochecknoglobals // set by ldflags
+var (
+	Appname = "pixad" //nolint:gochecknoglobals // set by ldflags
+	Version string    //nolint:gochecknoglobals // set by ldflags
+)
 
 var configPath string //nolint:gochecknoglobals // cobra flag
 
@@ -37,6 +40,7 @@ func main() {
 }
 
 func run(_ *cobra.Command, _ []string) {
+	globals.Appname = Appname
 	globals.Version = Version
 
 	// Set config path in environment if specified via flag

config.example.yml

@@ -13,8 +13,7 @@ state_dir: ./data
 # Generate with: openssl rand -base64 32
 signing_key: "CHANGE_ME_generate_with_openssl_rand_base64_32"
 
-# Hosts that don't require signatures
-# Use "." prefix for wildcard subdomain matching (e.g., ".example.com" matches "cdn.example.com")
+# Hosts that don't require signatures (exact match only)
 whitelist_hosts:
   - s3.sneak.cloud
   - static.sneak.cloud

internal/database/database.go

@@ -9,7 +9,6 @@ import (
 	"log/slog"
 	"path/filepath"
 	"sort"
-	"strconv"
 	"strings"
 
 	"go.uber.org/fx"
@@ -22,10 +21,6 @@ import (
 //go:embed schema/*.sql
 var schemaFS embed.FS
 
-// bootstrapVersion is the migration that creates the schema_migrations
-// table itself. It is applied before the normal migration loop.
-const bootstrapVersion = 0
-
 // Params defines dependencies for Database.
 type Params struct {
 	fx.In
@@ -40,46 +35,6 @@ type Database struct {
 	config *config.Config
 }
 
-// ParseMigrationVersion extracts the numeric version prefix from a migration
-// filename. Filenames must follow the pattern "<version>.sql" or
-// "<version>_<description>.sql", where version is a zero-padded numeric
-// string (e.g. "001", "002"). Returns the version as an integer and an
-// error if the filename does not match the expected pattern.
-func ParseMigrationVersion(filename string) (int, error) {
-	name := strings.TrimSuffix(filename, filepath.Ext(filename))
-	if name == "" {
-		return 0, fmt.Errorf("invalid migration filename %q: empty name", filename)
-	}
-
-	// Split on underscore to separate version from description.
-	// If there's no underscore, the entire stem is the version.
-	versionStr := name
-	if idx := strings.IndexByte(name, '_'); idx >= 0 {
-		versionStr = name[:idx]
-	}
-
-	if versionStr == "" {
-		return 0, fmt.Errorf("invalid migration filename %q: empty version prefix", filename)
-	}
-
-	// Validate the version is purely numeric.
-	for _, ch := range versionStr {
-		if ch < '0' || ch > '9' {
-			return 0, fmt.Errorf(
-				"invalid migration filename %q: version %q contains non-numeric character %q",
-				filename, versionStr, string(ch),
-			)
-		}
-	}
-
-	version, err := strconv.Atoi(versionStr)
-	if err != nil {
-		return 0, fmt.Errorf("invalid migration filename %q: %w", filename, err)
-	}
-
-	return version, nil
-}
-
 // New creates a new Database instance.
 func New(lc fx.Lifecycle, params Params) (*Database, error) {
 	s := &Database{
@@ -129,87 +84,43 @@ func (s *Database) connect(ctx context.Context) error {
 	s.db = db
 	s.log.Info("database connected")
 
-	return ApplyMigrations(ctx, s.db, s.log)
+	return s.runMigrations(ctx)
 }
 
-// collectMigrations reads the embedded schema directory and returns
-// migration filenames sorted lexicographically.
-func collectMigrations() ([]string, error) {
+func (s *Database) runMigrations(ctx context.Context) error {
+	// Create migrations tracking table
+	_, err := s.db.ExecContext(ctx, `
+		CREATE TABLE IF NOT EXISTS schema_migrations (
+			version TEXT PRIMARY KEY,
+			applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)
+	`)
+	if err != nil {
+		return fmt.Errorf("failed to create migrations table: %w", err)
+	}
+
+	// Get list of migration files
 	entries, err := schemaFS.ReadDir("schema")
 	if err != nil {
-		return nil, fmt.Errorf("failed to read schema directory: %w", err)
+		return fmt.Errorf("failed to read schema directory: %w", err)
 	}
 
+	// Sort migration files by name (001.sql, 002.sql, etc.)
 	var migrations []string
-
 	for _, entry := range entries {
 		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".sql") {
 			migrations = append(migrations, entry.Name())
 		}
 	}
-
 	sort.Strings(migrations)
 
-	return migrations, nil
-}
-
-// bootstrapMigrationsTable ensures the schema_migrations table exists
-// by applying 000.sql if the table is missing.
-func bootstrapMigrationsTable(ctx context.Context, db *sql.DB, log *slog.Logger) error {
-	var tableExists int
-
-	err := db.QueryRowContext(ctx,
-		"SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='schema_migrations'",
-	).Scan(&tableExists)
-	if err != nil {
-		return fmt.Errorf("failed to check for migrations table: %w", err)
-	}
-
-	if tableExists > 0 {
-		return nil
-	}
-
-	content, err := schemaFS.ReadFile("schema/000.sql")
-	if err != nil {
-		return fmt.Errorf("failed to read bootstrap migration 000.sql: %w", err)
-	}
-
-	if log != nil {
-		log.Info("applying bootstrap migration", "version", bootstrapVersion)
-	}
-
-	_, err = db.ExecContext(ctx, string(content))
-	if err != nil {
-		return fmt.Errorf("failed to apply bootstrap migration: %w", err)
-	}
-
-	return nil
-}
-
-// ApplyMigrations applies all pending migrations to db. An optional logger
-// may be provided for informational output; pass nil for silent operation.
-// This is exported so tests can apply the real schema without the full fx
-// lifecycle.
-func ApplyMigrations(ctx context.Context, db *sql.DB, log *slog.Logger) error {
-	if err := bootstrapMigrationsTable(ctx, db, log); err != nil {
-		return err
-	}
-
-	migrations, err := collectMigrations()
-	if err != nil {
-		return err
-	}
-
+	// Apply each migration that hasn't been applied yet
 	for _, migration := range migrations {
-		version, parseErr := ParseMigrationVersion(migration)
-		if parseErr != nil {
-			return parseErr
-		}
+		version := strings.TrimSuffix(migration, filepath.Ext(migration))
 
-		// Check if already applied.
+		// Check if already applied
 		var count int
-
-		err := db.QueryRowContext(ctx,
+		err := s.db.QueryRowContext(ctx,
 			"SELECT COUNT(*) FROM schema_migrations WHERE version = ?",
 			version,
 		).Scan(&count)
@@ -218,40 +129,34 @@ func ApplyMigrations(ctx context.Context, db *sql.DB, log *slog.Logger) error {
 		}
 
 		if count > 0 {
-			if log != nil {
-				log.Debug("migration already applied", "version", version)
-			}
+			s.log.Debug("migration already applied", "version", version)
 
 			continue
 		}
 
-		// Read and apply migration.
-		content, readErr := schemaFS.ReadFile(filepath.Join("schema", migration))
-		if readErr != nil {
-			return fmt.Errorf("failed to read migration %s: %w", migration, readErr)
+		// Read and apply migration
+		content, err := schemaFS.ReadFile(filepath.Join("schema", migration))
+		if err != nil {
+			return fmt.Errorf("failed to read migration %s: %w", migration, err)
 		}
 
-		if log != nil {
-			log.Info("applying migration", "version", version)
+		s.log.Info("applying migration", "version", version)
+
+		_, err = s.db.ExecContext(ctx, string(content))
+		if err != nil {
+			return fmt.Errorf("failed to apply migration %s: %w", migration, err)
 		}
 
-		_, execErr := db.ExecContext(ctx, string(content))
-		if execErr != nil {
-			return fmt.Errorf("failed to apply migration %s: %w", migration, execErr)
-		}
-
-		// Record migration as applied.
-		_, recErr := db.ExecContext(ctx,
+		// Record migration as applied
+		_, err = s.db.ExecContext(ctx,
 			"INSERT INTO schema_migrations (version) VALUES (?)",
 			version,
 		)
-		if recErr != nil {
-			return fmt.Errorf("failed to record migration %s: %w", migration, recErr)
+		if err != nil {
+			return fmt.Errorf("failed to record migration %s: %w", migration, err)
 		}
 
-		if log != nil {
-			log.Info("migration applied successfully", "version", version)
-		}
+		s.log.Info("migration applied successfully", "version", version)
 	}
 
 	return nil
@@ -261,3 +166,77 @@ func ApplyMigrations(ctx context.Context, db *sql.DB, log *slog.Logger) error {
 func (s *Database) DB() *sql.DB {
 	return s.db
 }
+
+// ApplyMigrations applies all migrations to the given database.
+// This is useful for testing where you want to use the real schema
+// without the full fx lifecycle.
+func ApplyMigrations(db *sql.DB) error {
+	ctx := context.Background()
+
+	// Create migrations tracking table
+	_, err := db.ExecContext(ctx, `
+		CREATE TABLE IF NOT EXISTS schema_migrations (
+			version TEXT PRIMARY KEY,
+			applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)
+	`)
+	if err != nil {
+		return fmt.Errorf("failed to create migrations table: %w", err)
+	}
+
+	// Get list of migration files
+	entries, err := schemaFS.ReadDir("schema")
+	if err != nil {
+		return fmt.Errorf("failed to read schema directory: %w", err)
+	}
+
+	// Sort migration files by name (001.sql, 002.sql, etc.)
+	var migrations []string
+	for _, entry := range entries {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".sql") {
+			migrations = append(migrations, entry.Name())
+		}
+	}
+	sort.Strings(migrations)
+
+	// Apply each migration that hasn't been applied yet
+	for _, migration := range migrations {
+		version := strings.TrimSuffix(migration, filepath.Ext(migration))
+
+		// Check if already applied
+		var count int
+		err := db.QueryRowContext(ctx,
+			"SELECT COUNT(*) FROM schema_migrations WHERE version = ?",
+			version,
+		).Scan(&count)
+		if err != nil {
+			return fmt.Errorf("failed to check migration status: %w", err)
+		}
+
+		if count > 0 {
+			continue
+		}
+
+		// Read and apply migration
+		content, err := schemaFS.ReadFile(filepath.Join("schema", migration))
+		if err != nil {
+			return fmt.Errorf("failed to read migration %s: %w", migration, err)
+		}
+
+		_, err = db.ExecContext(ctx, string(content))
+		if err != nil {
+			return fmt.Errorf("failed to apply migration %s: %w", migration, err)
+		}
+
+		// Record migration as applied
+		_, err = db.ExecContext(ctx,
+			"INSERT INTO schema_migrations (version) VALUES (?)",
+			version,
+		)
+		if err != nil {
+			return fmt.Errorf("failed to record migration %s: %w", migration, err)
+		}
+	}
+
+	return nil
+}

internal/database/database_test.go

@@ -1,224 +0,0 @@
-package database
-
-import (
-	"context"
-	"database/sql"
-	"testing"
-
-	_ "modernc.org/sqlite" // SQLite driver registration
-)
-
-// openTestDB returns a fresh in-memory SQLite database.
-func openTestDB(t *testing.T) *sql.DB {
-	t.Helper()
-
-	db, err := sql.Open("sqlite", ":memory:")
-	if err != nil {
-		t.Fatalf("failed to open test db: %v", err)
-	}
-
-	t.Cleanup(func() { db.Close() })
-
-	return db
-}
-
-func TestParseMigrationVersion(t *testing.T) {
-	tests := []struct {
-		name     string
-		filename string
-		want     int
-		wantErr  bool
-	}{
-		{
-			name:     "version only",
-			filename: "001.sql",
-			want:     1,
-		},
-		{
-			name:     "version with description",
-			filename: "001_initial_schema.sql",
-			want:     1,
-		},
-		{
-			name:     "multi-digit version",
-			filename: "042_add_indexes.sql",
-			want:     42,
-		},
-		{
-			name:     "long version number",
-			filename: "00001_long_prefix.sql",
-			want:     1,
-		},
-		{
-			name:     "description with multiple underscores",
-			filename: "003_add_user_auth_tables.sql",
-			want:     3,
-		},
-		{
-			name:     "empty filename",
-			filename: ".sql",
-			wantErr:  true,
-		},
-		{
-			name:     "leading underscore",
-			filename: "_description.sql",
-			wantErr:  true,
-		},
-		{
-			name:     "non-numeric version",
-			filename: "abc_migration.sql",
-			wantErr:  true,
-		},
-		{
-			name:     "mixed alphanumeric version",
-			filename: "001a_migration.sql",
-			wantErr:  true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got, err := ParseMigrationVersion(tt.filename)
-			if tt.wantErr {
-				if err == nil {
-					t.Errorf("ParseMigrationVersion(%q) expected error, got %d", tt.filename, got)
-				}
-
-				return
-			}
-
-			if err != nil {
-				t.Errorf("ParseMigrationVersion(%q) unexpected error: %v", tt.filename, err)
-
-				return
-			}
-
-			if got != tt.want {
-				t.Errorf("ParseMigrationVersion(%q) = %d, want %d", tt.filename, got, tt.want)
-			}
-		})
-	}
-}
-
-func TestApplyMigrations_CreatesSchemaAndTables(t *testing.T) {
-	db := openTestDB(t)
-	ctx := context.Background()
-
-	if err := ApplyMigrations(ctx, db, nil); err != nil {
-		t.Fatalf("ApplyMigrations failed: %v", err)
-	}
-
-	// The schema_migrations table must exist and contain at least
-	// version 0 (the bootstrap) and 1 (the initial schema).
-	rows, err := db.Query("SELECT version FROM schema_migrations ORDER BY version")
-	if err != nil {
-		t.Fatalf("failed to query schema_migrations: %v", err)
-	}
-	defer rows.Close()
-
-	var versions []int
-	for rows.Next() {
-		var v int
-		if err := rows.Scan(&v); err != nil {
-			t.Fatalf("failed to scan version: %v", err)
-		}
-
-		versions = append(versions, v)
-	}
-
-	if err := rows.Err(); err != nil {
-		t.Fatalf("row iteration error: %v", err)
-	}
-
-	if len(versions) < 2 {
-		t.Fatalf("expected at least 2 migrations recorded, got %d: %v", len(versions), versions)
-	}
-
-	if versions[0] != 0 {
-		t.Errorf("first recorded migration = %d, want %d", versions[0], 0)
-	}
-
-	if versions[1] != 1 {
-		t.Errorf("second recorded migration = %d, want %d", versions[1], 1)
-	}
-
-	// Verify that the application tables created by 001.sql exist.
-	for _, table := range []string{"source_content", "source_metadata", "output_content", "request_cache", "negative_cache", "cache_stats"} {
-		var count int
-
-		err := db.QueryRow(
-			"SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name=?",
-			table,
-		).Scan(&count)
-		if err != nil {
-			t.Fatalf("failed to check for table %s: %v", table, err)
-		}
-
-		if count != 1 {
-			t.Errorf("table %s does not exist after migrations", table)
-		}
-	}
-}
-
-func TestApplyMigrations_Idempotent(t *testing.T) {
-	db := openTestDB(t)
-	ctx := context.Background()
-
-	if err := ApplyMigrations(ctx, db, nil); err != nil {
-		t.Fatalf("first ApplyMigrations failed: %v", err)
-	}
-
-	// Running a second time must succeed without errors.
-	if err := ApplyMigrations(ctx, db, nil); err != nil {
-		t.Fatalf("second ApplyMigrations failed: %v", err)
-	}
-
-	// Verify no duplicate rows in schema_migrations.
-	var count int
-
-	err := db.QueryRow("SELECT COUNT(*) FROM schema_migrations WHERE version = 0").Scan(&count)
-	if err != nil {
-		t.Fatalf("failed to count version 0 rows: %v", err)
-	}
-
-	if count != 1 {
-		t.Errorf("expected exactly 1 row for version 0, got %d", count)
-	}
-}
-
-func TestBootstrapMigrationsTable_FreshDatabase(t *testing.T) {
-	db := openTestDB(t)
-	ctx := context.Background()
-
-	if err := bootstrapMigrationsTable(ctx, db, nil); err != nil {
-		t.Fatalf("bootstrapMigrationsTable failed: %v", err)
-	}
-
-	// schema_migrations table must exist.
-	var tableCount int
-
-	err := db.QueryRow(
-		"SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='schema_migrations'",
-	).Scan(&tableCount)
-	if err != nil {
-		t.Fatalf("failed to check for table: %v", err)
-	}
-
-	if tableCount != 1 {
-		t.Fatalf("schema_migrations table not created")
-	}
-
-	// Version 0 must be recorded.
-	var recorded int
-
-	err = db.QueryRow(
-		"SELECT COUNT(*) FROM schema_migrations WHERE version = 0",
-	).Scan(&recorded)
-	if err != nil {
-		t.Fatalf("failed to check version: %v", err)
-	}
-
-	if recorded != 1 {
-		t.Errorf("expected version 0 to be recorded, got count %d", recorded)
-	}
-}

internal/database/schema/000.sql

@@ -1,9 +0,0 @@
--- Migration 000: Schema migrations tracking table
--- Applied as a bootstrap step before the normal migration loop.
-
-CREATE TABLE IF NOT EXISTS schema_migrations (
-    version INTEGER PRIMARY KEY,
-    applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
-);
-
-INSERT OR IGNORE INTO schema_migrations (version) VALUES (0);

internal/globals/globals.go

@@ -5,10 +5,11 @@ import (
 	"go.uber.org/fx"
 )
 
-const appname = "pixad"
-
-// Version is populated from main() via ldflags.
-var Version string //nolint:gochecknoglobals // set from main
+// Build-time variables populated from main() via ldflags.
+var (
+	Appname string //nolint:gochecknoglobals // set from main
+	Version string //nolint:gochecknoglobals // set from main
+)
 
 // Globals holds application-wide constants.
 type Globals struct {
@@ -19,7 +20,7 @@ type Globals struct {
 // New creates a new Globals instance from build-time variables.
 func New(_ fx.Lifecycle) (*Globals, error) {
 	return &Globals{
-		Appname: appname,
+		Appname: Appname,
 		Version: Version,
 	}, nil
 }

internal/handlers/handlers_test.go

@@ -82,7 +82,7 @@ func setupTestDB(t *testing.T) *sql.DB {
 		t.Fatalf("failed to open test db: %v", err)
 	}
 
-	if err := database.ApplyMigrations(context.Background(), db, nil); err != nil {
+	if err := database.ApplyMigrations(db); err != nil {
 		t.Fatalf("failed to apply migrations: %v", err)
 	}
 

internal/imgcache/imgcache.go

@@ -199,6 +199,36 @@ type FetchResult struct {
 	TLSCipherSuite string
 }
 
+// Processor handles image transformation (resize, format conversion)
+type Processor interface {
+	// Process transforms an image according to the request
+	Process(ctx context.Context, input io.Reader, req *ImageRequest) (*ProcessResult, error)
+	// SupportedInputFormats returns MIME types this processor can read
+	SupportedInputFormats() []string
+	// SupportedOutputFormats returns formats this processor can write
+	SupportedOutputFormats() []ImageFormat
+}
+
+// ProcessResult contains the result of image processing
+type ProcessResult struct {
+	// Content is the processed image data
+	Content io.ReadCloser
+	// ContentLength is the size in bytes
+	ContentLength int64
+	// ContentType is the MIME type of the output
+	ContentType string
+	// Width is the output image width
+	Width int
+	// Height is the output image height
+	Height int
+	// InputWidth is the original image width before processing
+	InputWidth int
+	// InputHeight is the original image height before processing
+	InputHeight int
+	// InputFormat is the detected input format (e.g., "jpeg", "png")
+	InputFormat string
+}
+
 // Storage handles persistent storage of cached content
 type Storage interface {
 	// Store saves content and returns its hash

internal/imgcache/processor.go

@@ -1,5 +1,4 @@
-// Package imageprocessor provides image format conversion and resizing using libvips.
-package imageprocessor
+package imgcache
 
 import (
 	"bytes"
@@ -23,133 +22,38 @@ func initVips() {
 	})
 }
 
-// Format represents supported output image formats.
-type Format string
-
-// Supported image output formats.
-const (
-	FormatOriginal Format = "orig"
-	FormatJPEG     Format = "jpeg"
-	FormatPNG      Format = "png"
-	FormatWebP     Format = "webp"
-	FormatAVIF     Format = "avif"
-	FormatGIF      Format = "gif"
-)
-
-// FitMode represents how to fit an image into requested dimensions.
-type FitMode string
-
-// Supported image fit modes.
-const (
-	FitCover   FitMode = "cover"
-	FitContain FitMode = "contain"
-	FitFill    FitMode = "fill"
-	FitInside  FitMode = "inside"
-	FitOutside FitMode = "outside"
-)
-
-// ErrInvalidFitMode is returned when an invalid fit mode is provided.
-var ErrInvalidFitMode = errors.New("invalid fit mode")
-
-// Size represents requested image dimensions.
-type Size struct {
-	Width  int
-	Height int
-}
-
-// Request holds the parameters for image processing.
-type Request struct {
-	Size    Size
-	Format  Format
-	Quality int
-	FitMode FitMode
-}
-
-// Result contains the output of image processing.
-type Result struct {
-	// Content is the processed image data.
-	Content io.ReadCloser
-	// ContentLength is the size in bytes.
-	ContentLength int64
-	// ContentType is the MIME type of the output.
-	ContentType string
-	// Width is the output image width.
-	Width int
-	// Height is the output image height.
-	Height int
-	// InputWidth is the original image width before processing.
-	InputWidth int
-	// InputHeight is the original image height before processing.
-	InputHeight int
-	// InputFormat is the detected input format (e.g., "jpeg", "png").
-	InputFormat string
-}
-
 // MaxInputDimension is the maximum allowed width or height for input images.
 // Images larger than this are rejected to prevent DoS via decompression bombs.
 const MaxInputDimension = 8192
 
-// DefaultMaxInputBytes is the default maximum input size in bytes (50 MiB).
-// This matches the default upstream fetcher limit.
-const DefaultMaxInputBytes = 50 << 20
-
 // ErrInputTooLarge is returned when input image dimensions exceed MaxInputDimension.
 var ErrInputTooLarge = errors.New("input image dimensions exceed maximum")
 
-// ErrInputDataTooLarge is returned when the raw input data exceeds the configured byte limit.
-var ErrInputDataTooLarge = errors.New("input data exceeds maximum allowed size")
-
 // ErrUnsupportedOutputFormat is returned when the requested output format is not supported.
 var ErrUnsupportedOutputFormat = errors.New("unsupported output format")
 
-// ImageProcessor implements image transformation using libvips via govips.
-type ImageProcessor struct {
-	maxInputBytes int64
-}
+// ImageProcessor implements the Processor interface using libvips via govips.
+type ImageProcessor struct{}
 
-// Params holds configuration for creating an ImageProcessor.
-// Zero values use sensible defaults (MaxInputBytes defaults to DefaultMaxInputBytes).
-type Params struct {
-	// MaxInputBytes is the maximum allowed input size in bytes.
-	// If <= 0, DefaultMaxInputBytes is used.
-	MaxInputBytes int64
-}
-
-// New creates a new image processor with the given parameters.
-// A zero-value Params{} uses sensible defaults.
-func New(params Params) *ImageProcessor {
+// NewImageProcessor creates a new image processor.
+func NewImageProcessor() *ImageProcessor {
 	initVips()
 
-	maxInputBytes := params.MaxInputBytes
-	if maxInputBytes <= 0 {
-		maxInputBytes = DefaultMaxInputBytes
-	}
-
-	return &ImageProcessor{
-		maxInputBytes: maxInputBytes,
-	}
+	return &ImageProcessor{}
 }
 
 // Process transforms an image according to the request.
 func (p *ImageProcessor) Process(
 	_ context.Context,
 	input io.Reader,
-	req *Request,
-) (*Result, error) {
-	// Read input with a size limit to prevent unbounded memory consumption.
-	// We read at most maxInputBytes+1 so we can detect if the input exceeds
-	// the limit without consuming additional memory.
-	limited := io.LimitReader(input, p.maxInputBytes+1)
-
-	data, err := io.ReadAll(limited)
+	req *ImageRequest,
+) (*ProcessResult, error) {
+	// Read input
+	data, err := io.ReadAll(input)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read input: %w", err)
 	}
 
-	if int64(len(data)) > p.maxInputBytes {
-		return nil, ErrInputDataTooLarge
-	}
-
 	// Decode image
 	img, err := vips.NewImageFromBuffer(data)
 	if err != nil {
@@ -205,10 +109,10 @@ func (p *ImageProcessor) Process(
 		return nil, fmt.Errorf("failed to encode: %w", err)
 	}
 
-	return &Result{
+	return &ProcessResult{
 		Content:       io.NopCloser(bytes.NewReader(output)),
 		ContentLength: int64(len(output)),
-		ContentType:   FormatToMIME(outputFormat),
+		ContentType:   ImageFormatToMIME(outputFormat),
 		Width:         img.Width(),
 		Height:        img.Height(),
 		InputWidth:    origWidth,
@@ -220,17 +124,17 @@ func (p *ImageProcessor) Process(
 // SupportedInputFormats returns MIME types this processor can read.
 func (p *ImageProcessor) SupportedInputFormats() []string {
 	return []string{
-		"image/jpeg",
-		"image/png",
-		"image/gif",
-		"image/webp",
-		"image/avif",
+		string(MIMETypeJPEG),
+		string(MIMETypePNG),
+		string(MIMETypeGIF),
+		string(MIMETypeWebP),
+		string(MIMETypeAVIF),
 	}
 }
 
 // SupportedOutputFormats returns formats this processor can write.
-func (p *ImageProcessor) SupportedOutputFormats() []Format {
-	return []Format{
+func (p *ImageProcessor) SupportedOutputFormats() []ImageFormat {
+	return []ImageFormat{
 		FormatJPEG,
 		FormatPNG,
 		FormatGIF,
@@ -239,24 +143,6 @@ func (p *ImageProcessor) SupportedOutputFormats() []Format {
 	}
 }
 
-// FormatToMIME converts a Format to its MIME type string.
-func FormatToMIME(format Format) string {
-	switch format {
-	case FormatJPEG:
-		return "image/jpeg"
-	case FormatPNG:
-		return "image/png"
-	case FormatWebP:
-		return "image/webp"
-	case FormatGIF:
-		return "image/gif"
-	case FormatAVIF:
-		return "image/avif"
-	default:
-		return "application/octet-stream"
-	}
-}
-
 // detectFormat returns the format string from a vips image.
 func (p *ImageProcessor) detectFormat(img *vips.ImageRef) string {
 	format := img.Format()
@@ -285,6 +171,7 @@ func (p *ImageProcessor) resize(img *vips.ImageRef, width, height int, fit FitMo
 
 	case FitContain:
 		// Resize to fit within dimensions, maintaining aspect ratio
+		// Calculate target dimensions maintaining aspect ratio
 		imgW, imgH := img.Width(), img.Height()
 		scaleW := float64(width) / float64(imgW)
 		scaleH := float64(height) / float64(imgH)
@@ -295,7 +182,7 @@ func (p *ImageProcessor) resize(img *vips.ImageRef, width, height int, fit FitMo
 		return img.Thumbnail(newW, newH, vips.InterestingNone)
 
 	case FitFill:
-		// Resize to exact dimensions (may distort)
+		// Resize to exact dimensions (may distort) - use ThumbnailWithSize with Force
 		return img.ThumbnailWithSize(width, height, vips.InterestingNone, vips.SizeForce)
 
 	case FitInside:
@@ -331,7 +218,7 @@ func (p *ImageProcessor) resize(img *vips.ImageRef, width, height int, fit FitMo
 const defaultQuality = 85
 
 // encode encodes an image to the specified format.
-func (p *ImageProcessor) encode(img *vips.ImageRef, format Format, quality int) ([]byte, error) {
+func (p *ImageProcessor) encode(img *vips.ImageRef, format ImageFormat, quality int) ([]byte, error) {
 	if quality <= 0 {
 		quality = defaultQuality
 	}
@@ -379,8 +266,8 @@ func (p *ImageProcessor) encode(img *vips.ImageRef, format Format, quality int)
 	return output, nil
 }
 
-// formatFromString converts a format string to Format.
-func (p *ImageProcessor) formatFromString(format string) Format {
+// formatFromString converts a format string to ImageFormat.
+func (p *ImageProcessor) formatFromString(format string) ImageFormat {
 	switch format {
 	case "jpeg":
 		return FormatJPEG

internal/imgcache/processor_test.go

@@ -1,4 +1,4 @@
-package imageprocessor
+package imgcache
 
 import (
 	"bytes"
@@ -70,36 +70,13 @@ func createTestPNG(t *testing.T, width, height int) []byte {
 	return buf.Bytes()
 }
 
-// detectMIME is a minimal magic-byte detector for test assertions.
-func detectMIME(data []byte) string {
-	if len(data) >= 3 && data[0] == 0xFF && data[1] == 0xD8 && data[2] == 0xFF {
-		return "image/jpeg"
-	}
-	if len(data) >= 8 && string(data[:8]) == "\x89PNG\r\n\x1a\n" {
-		return "image/png"
-	}
-	if len(data) >= 4 && string(data[:4]) == "GIF8" {
-		return "image/gif"
-	}
-	if len(data) >= 12 && string(data[:4]) == "RIFF" && string(data[8:12]) == "WEBP" {
-		return "image/webp"
-	}
-	if len(data) >= 12 && string(data[4:8]) == "ftyp" {
-		brand := string(data[8:12])
-		if brand == "avif" || brand == "avis" {
-			return "image/avif"
-		}
-	}
-	return ""
-}
-
 func TestImageProcessor_ResizeJPEG(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestJPEG(t, 800, 600)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 400, Height: 300},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -130,19 +107,23 @@ func TestImageProcessor_ResizeJPEG(t *testing.T) {
 		t.Fatalf("failed to read result: %v", err)
 	}
 
-	mime := detectMIME(data)
-	if mime != "image/jpeg" {
-		t.Errorf("Output format = %v, want image/jpeg", mime)
+	mime, err := DetectFormat(data)
+	if err != nil {
+		t.Fatalf("DetectFormat() error = %v", err)
+	}
+
+	if mime != MIMETypeJPEG {
+		t.Errorf("Output format = %v, want %v", mime, MIMETypeJPEG)
 	}
 }
 
 func TestImageProcessor_ConvertToPNG(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestJPEG(t, 200, 150)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 200, Height: 150},
 		Format:  FormatPNG,
 		FitMode: FitCover,
@@ -159,19 +140,23 @@ func TestImageProcessor_ConvertToPNG(t *testing.T) {
 		t.Fatalf("failed to read result: %v", err)
 	}
 
-	mime := detectMIME(data)
-	if mime != "image/png" {
-		t.Errorf("Output format = %v, want image/png", mime)
+	mime, err := DetectFormat(data)
+	if err != nil {
+		t.Fatalf("DetectFormat() error = %v", err)
+	}
+
+	if mime != MIMETypePNG {
+		t.Errorf("Output format = %v, want %v", mime, MIMETypePNG)
 	}
 }
 
 func TestImageProcessor_OriginalSize(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestJPEG(t, 640, 480)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 0, Height: 0}, // Original size
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -194,14 +179,14 @@ func TestImageProcessor_OriginalSize(t *testing.T) {
 }
 
 func TestImageProcessor_FitContain(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// 800x400 image (2:1 aspect) into 400x400 box with contain
 	// Should result in 400x200 (maintaining aspect ratio)
 	input := createTestJPEG(t, 800, 400)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 400, Height: 400},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -221,14 +206,14 @@ func TestImageProcessor_FitContain(t *testing.T) {
 }
 
 func TestImageProcessor_ProportionalScale_WidthOnly(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// 800x600 image, request width=400 height=0
 	// Should scale proportionally to 400x300
 	input := createTestJPEG(t, 800, 600)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 400, Height: 0},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -251,14 +236,14 @@ func TestImageProcessor_ProportionalScale_WidthOnly(t *testing.T) {
 }
 
 func TestImageProcessor_ProportionalScale_HeightOnly(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// 800x600 image, request width=0 height=300
 	// Should scale proportionally to 400x300
 	input := createTestJPEG(t, 800, 600)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 0, Height: 300},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -281,12 +266,12 @@ func TestImageProcessor_ProportionalScale_HeightOnly(t *testing.T) {
 }
 
 func TestImageProcessor_ProcessPNG(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestPNG(t, 400, 300)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 200, Height: 150},
 		Format:  FormatPNG,
 		FitMode: FitCover,
@@ -307,8 +292,13 @@ func TestImageProcessor_ProcessPNG(t *testing.T) {
 	}
 }
 
+func TestImageProcessor_ImplementsInterface(t *testing.T) {
+	// Verify ImageProcessor implements Processor interface
+	var _ Processor = (*ImageProcessor)(nil)
+}
+
 func TestImageProcessor_SupportedFormats(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 
 	inputFormats := proc.SupportedInputFormats()
 	if len(inputFormats) == 0 {
@@ -322,14 +312,14 @@ func TestImageProcessor_SupportedFormats(t *testing.T) {
 }
 
 func TestImageProcessor_RejectsOversizedInput(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// Create an image that exceeds MaxInputDimension (e.g., 10000x100)
 	// This should be rejected before processing to prevent DoS
 	input := createTestJPEG(t, 10000, 100)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 100, Height: 100},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -347,13 +337,13 @@ func TestImageProcessor_RejectsOversizedInput(t *testing.T) {
 }
 
 func TestImageProcessor_RejectsOversizedInputHeight(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// Create an image with oversized height
 	input := createTestJPEG(t, 100, 10000)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 100, Height: 100},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -371,13 +361,14 @@ func TestImageProcessor_RejectsOversizedInputHeight(t *testing.T) {
 }
 
 func TestImageProcessor_AcceptsMaxDimensionInput(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// Create an image at exactly MaxInputDimension - should be accepted
+	// Using smaller dimensions to keep test fast
 	input := createTestJPEG(t, MaxInputDimension, 100)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 100, Height: 100},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -392,12 +383,12 @@ func TestImageProcessor_AcceptsMaxDimensionInput(t *testing.T) {
 }
 
 func TestImageProcessor_EncodeWebP(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestJPEG(t, 200, 150)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 100, Height: 75},
 		Format:  FormatWebP,
 		Quality: 80,
@@ -416,9 +407,13 @@ func TestImageProcessor_EncodeWebP(t *testing.T) {
 		t.Fatalf("failed to read result: %v", err)
 	}
 
-	mime := detectMIME(data)
-	if mime != "image/webp" {
-		t.Errorf("Output format = %v, want image/webp", mime)
+	mime, err := DetectFormat(data)
+	if err != nil {
+		t.Fatalf("DetectFormat() error = %v", err)
+	}
+
+	if mime != MIMETypeWebP {
+		t.Errorf("Output format = %v, want %v", mime, MIMETypeWebP)
 	}
 
 	// Verify dimensions
@@ -431,7 +426,7 @@ func TestImageProcessor_EncodeWebP(t *testing.T) {
 }
 
 func TestImageProcessor_DecodeAVIF(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	// Load test AVIF file
@@ -441,7 +436,7 @@ func TestImageProcessor_DecodeAVIF(t *testing.T) {
 	}
 
 	// Request resize and convert to JPEG
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 2, Height: 2},
 		Format:  FormatJPEG,
 		Quality: 85,
@@ -460,84 +455,23 @@ func TestImageProcessor_DecodeAVIF(t *testing.T) {
 		t.Fatalf("failed to read result: %v", err)
 	}
 
-	mime := detectMIME(data)
-	if mime != "image/jpeg" {
-		t.Errorf("Output format = %v, want image/jpeg", mime)
-	}
-}
-
-func TestImageProcessor_RejectsOversizedInputData(t *testing.T) {
-	// Create a processor with a very small byte limit
-	const limit = 1024
-	proc := New(Params{MaxInputBytes: limit})
-	ctx := context.Background()
-
-	// Create a valid JPEG that exceeds the byte limit
-	input := createTestJPEG(t, 800, 600) // will be well over 1 KiB
-	if int64(len(input)) <= limit {
-		t.Fatalf("test JPEG must exceed %d bytes, got %d", limit, len(input))
-	}
-
-	req := &Request{
-		Size:    Size{Width: 100, Height: 75},
-		Format:  FormatJPEG,
-		Quality: 85,
-		FitMode: FitCover,
-	}
-
-	_, err := proc.Process(ctx, bytes.NewReader(input), req)
-	if err == nil {
-		t.Fatal("Process() should reject input exceeding maxInputBytes")
-	}
-
-	if err != ErrInputDataTooLarge {
-		t.Errorf("Process() error = %v, want ErrInputDataTooLarge", err)
-	}
-}
-
-func TestImageProcessor_AcceptsInputWithinLimit(t *testing.T) {
-	// Create a small image and set limit well above its size
-	input := createTestJPEG(t, 10, 10)
-	limit := int64(len(input)) * 10 // 10× headroom
-
-	proc := New(Params{MaxInputBytes: limit})
-	ctx := context.Background()
-
-	req := &Request{
-		Size:    Size{Width: 10, Height: 10},
-		Format:  FormatJPEG,
-		Quality: 85,
-		FitMode: FitCover,
-	}
-
-	result, err := proc.Process(ctx, bytes.NewReader(input), req)
+	mime, err := DetectFormat(data)
 	if err != nil {
-		t.Fatalf("Process() error = %v, want nil", err)
-	}
-	defer result.Content.Close()
+		t.Fatalf("DetectFormat() error = %v", err)
 	}
 
-func TestImageProcessor_DefaultMaxInputBytes(t *testing.T) {
-	// Passing 0 should use the default
-	proc := New(Params{})
-	if proc.maxInputBytes != DefaultMaxInputBytes {
-		t.Errorf("maxInputBytes = %d, want %d", proc.maxInputBytes, DefaultMaxInputBytes)
-	}
-
-	// Passing negative should also use the default
-	proc = New(Params{MaxInputBytes: -1})
-	if proc.maxInputBytes != DefaultMaxInputBytes {
-		t.Errorf("maxInputBytes = %d, want %d", proc.maxInputBytes, DefaultMaxInputBytes)
+	if mime != MIMETypeJPEG {
+		t.Errorf("Output format = %v, want %v", mime, MIMETypeJPEG)
 	}
 }
 
 func TestImageProcessor_EncodeAVIF(t *testing.T) {
-	proc := New(Params{})
+	proc := NewImageProcessor()
 	ctx := context.Background()
 
 	input := createTestJPEG(t, 200, 150)
 
-	req := &Request{
+	req := &ImageRequest{
 		Size:    Size{Width: 100, Height: 75},
 		Format:  FormatAVIF,
 		Quality: 85,
@@ -556,9 +490,13 @@ func TestImageProcessor_EncodeAVIF(t *testing.T) {
 		t.Fatalf("failed to read result: %v", err)
 	}
 
-	mime := detectMIME(data)
-	if mime != "image/avif" {
-		t.Errorf("Output format = %v, want image/avif", mime)
+	mime, err := DetectFormat(data)
+	if err != nil {
+		t.Fatalf("DetectFormat() error = %v", err)
+	}
+
+	if mime != MIMETypeAVIF {
+		t.Errorf("Output format = %v, want %v", mime, MIMETypeAVIF)
 	}
 
 	// Verify dimensions

internal/imgcache/service.go

@@ -11,19 +11,17 @@ import (
 	"time"
 
 	"github.com/dustin/go-humanize"
-	"sneak.berlin/go/pixa/internal/imageprocessor"
 )
 
 // Service implements the ImageCache interface, orchestrating cache, fetcher, and processor.
 type Service struct {
 	cache     *Cache
 	fetcher   Fetcher
-	processor       *imageprocessor.ImageProcessor
+	processor Processor
 	signer    *Signer
 	whitelist *HostWhitelist
 	log       *slog.Logger
 	allowHTTP bool
-	maxResponseSize int64
 }
 
 // ServiceConfig holds configuration for the image service.
@@ -52,17 +50,15 @@ func NewService(cfg *ServiceConfig) (*Service, error) {
 		return nil, errors.New("signing key is required")
 	}
 
-	// Resolve fetcher config for defaults
-	fetcherCfg := cfg.FetcherConfig
-	if fetcherCfg == nil {
-		fetcherCfg = DefaultFetcherConfig()
-	}
-
 	// Use custom fetcher if provided, otherwise create HTTP fetcher
 	var fetcher Fetcher
 	if cfg.Fetcher != nil {
 		fetcher = cfg.Fetcher
 	} else {
+		fetcherCfg := cfg.FetcherConfig
+		if fetcherCfg == nil {
+			fetcherCfg = DefaultFetcherConfig()
+		}
 		fetcher = NewHTTPFetcher(fetcherCfg)
 	}
 
@@ -78,17 +74,14 @@ func NewService(cfg *ServiceConfig) (*Service, error) {
 		allowHTTP = cfg.FetcherConfig.AllowHTTP
 	}
 
-	maxResponseSize := fetcherCfg.MaxResponseSize
-
 	return &Service{
 		cache:     cfg.Cache,
 		fetcher:   fetcher,
-		processor:       imageprocessor.New(imageprocessor.Params{MaxInputBytes: maxResponseSize}),
+		processor: NewImageProcessor(),
 		signer:    signer,
 		whitelist: NewHostWhitelist(cfg.Whitelist),
 		log:       log,
 		allowHTTP: allowHTTP,
-		maxResponseSize: maxResponseSize,
 	}, nil
 }
 
@@ -153,40 +146,6 @@ func (s *Service) Get(ctx context.Context, req *ImageRequest) (*ImageResponse, e
 	return response, nil
 }
 
-// loadCachedSource attempts to load source content from cache, returning nil
-// if the cached data is unavailable or exceeds maxResponseSize.
-func (s *Service) loadCachedSource(contentHash ContentHash) []byte {
-	reader, err := s.cache.GetSourceContent(contentHash)
-	if err != nil {
-		s.log.Warn("failed to load cached source, fetching", "error", err)
-
-		return nil
-	}
-
-	// Bound the read to maxResponseSize to prevent unbounded memory use
-	// from unexpectedly large cached files.
-	limited := io.LimitReader(reader, s.maxResponseSize+1)
-	data, err := io.ReadAll(limited)
-	_ = reader.Close()
-
-	if err != nil {
-		s.log.Warn("failed to read cached source, fetching", "error", err)
-
-		return nil
-	}
-
-	if int64(len(data)) > s.maxResponseSize {
-		s.log.Warn("cached source exceeds max response size, discarding",
-			"hash", contentHash,
-			"max_bytes", s.maxResponseSize,
-		)
-
-		return nil
-	}
-
-	return data
-}
-
 // processFromSourceOrFetch processes an image, using cached source content if available.
 func (s *Service) processFromSourceOrFetch(
 	ctx context.Context,
@@ -203,8 +162,22 @@ func (s *Service) processFromSourceOrFetch(
 	var fetchBytes int64
 
 	if contentHash != "" {
+		// We have cached source - load it
 		s.log.Debug("using cached source", "hash", contentHash)
-		sourceData = s.loadCachedSource(contentHash)
+
+		reader, err := s.cache.GetSourceContent(contentHash)
+		if err != nil {
+			s.log.Warn("failed to load cached source, fetching", "error", err)
+			// Fall through to fetch
+		} else {
+			sourceData, err = io.ReadAll(reader)
+			_ = reader.Close()
+
+			if err != nil {
+				s.log.Warn("failed to read cached source, fetching", "error", err)
+				// Fall through to fetch
+			}
+		}
 	}
 
 	// Fetch from upstream if we don't have source data or it's empty
@@ -301,14 +274,7 @@ func (s *Service) processAndStore(
 	// Process the image
 	processStart := time.Now()
 
-	processReq := &imageprocessor.Request{
-		Size:    imageprocessor.Size{Width: req.Size.Width, Height: req.Size.Height},
-		Format:  imageprocessor.Format(req.Format),
-		Quality: req.Quality,
-		FitMode: imageprocessor.FitMode(req.FitMode),
-	}
-
-	processResult, err := s.processor.Process(ctx, bytes.NewReader(sourceData), processReq)
+	processResult, err := s.processor.Process(ctx, bytes.NewReader(sourceData), req)
 	if err != nil {
 		return nil, fmt.Errorf("image processing failed: %w", err)
 	}

internal/imgcache/stats_test.go

@@ -16,7 +16,7 @@ func setupStatsTestDB(t *testing.T) *sql.DB {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if err := database.ApplyMigrations(context.Background(), db, nil); err != nil {
+	if err := database.ApplyMigrations(db); err != nil {
 		t.Fatal(err)
 	}
 	t.Cleanup(func() { db.Close() })

internal/imgcache/testutil_test.go

@@ -2,7 +2,6 @@ package imgcache
 
 import (
 	"bytes"
-	"context"
 	"database/sql"
 	"image"
 	"image/color"
@@ -194,7 +193,7 @@ func setupServiceTestDB(t *testing.T) *sql.DB {
 	}
 
 	// Use the real production schema via migrations
-	if err := database.ApplyMigrations(context.Background(), db, nil); err != nil {
+	if err := database.ApplyMigrations(db); err != nil {
 		t.Fatalf("failed to apply migrations: %v", err)
 	}
 

internal/imgcache/whitelist.go

@@ -6,22 +6,19 @@ import (
 )
 
 // HostWhitelist implements the Whitelist interface for checking allowed source hosts.
+// Only exact host matches are supported. Leading dots in patterns are stripped
+// (e.g. ".example.com" becomes an exact match for "example.com").
 type HostWhitelist struct {
-	// exactHosts contains hosts that must match exactly (e.g., "cdn.example.com")
-	exactHosts map[string]struct{}
-	// suffixHosts contains domain suffixes to match (e.g., ".example.com" matches "cdn.example.com")
-	suffixHosts []string
+	// hosts contains hosts that must match exactly (e.g., "cdn.example.com")
+	hosts map[string]struct{}
 }
 
 // NewHostWhitelist creates a whitelist from a list of host patterns.
-// Patterns starting with "." are treated as suffix matches.
-// Examples:
-//   - "cdn.example.com" - exact match only
-//   - ".example.com" - matches cdn.example.com, images.example.com, etc.
+// All patterns are treated as exact matches. Leading dots are stripped
+// for backwards compatibility (e.g. ".example.com" matches "example.com" only).
 func NewHostWhitelist(patterns []string) *HostWhitelist {
 	w := &HostWhitelist{
-		exactHosts:  make(map[string]struct{}),
-		suffixHosts: make([]string, 0),
+		hosts: make(map[string]struct{}),
 	}
 
 	for _, pattern := range patterns {
@@ -30,17 +27,22 @@ func NewHostWhitelist(patterns []string) *HostWhitelist {
 			continue
 		}
 
-		if strings.HasPrefix(pattern, ".") {
-			w.suffixHosts = append(w.suffixHosts, pattern)
-		} else {
-			w.exactHosts[pattern] = struct{}{}
+		// Strip leading dot — suffix matching is not supported.
+		// ".example.com" is treated as exact match for "example.com".
+		pattern = strings.TrimPrefix(pattern, ".")
+
+		if pattern == "" {
+			continue
 		}
+
+		w.hosts[pattern] = struct{}{}
 	}
 
 	return w
 }
 
 // IsWhitelisted checks if a URL's host is in the whitelist.
+// Only exact host matches are supported.
 func (w *HostWhitelist) IsWhitelisted(u *url.URL) bool {
 	if u == nil {
 		return false
@@ -51,32 +53,17 @@ func (w *HostWhitelist) IsWhitelisted(u *url.URL) bool {
 		return false
 	}
 
-	// Check exact match
-	if _, ok := w.exactHosts[host]; ok {
-		return true
-	}
+	_, ok := w.hosts[host]
 
-	// Check suffix match
-	for _, suffix := range w.suffixHosts {
-		if strings.HasSuffix(host, suffix) {
-			return true
-		}
-		// Also match if host equals the suffix without the leading dot
-		// e.g., pattern ".example.com" should match "example.com"
-		if host == strings.TrimPrefix(suffix, ".") {
-			return true
-		}
-	}
-
-	return false
+	return ok
 }
 
 // IsEmpty returns true if the whitelist has no entries.
 func (w *HostWhitelist) IsEmpty() bool {
-	return len(w.exactHosts) == 0 && len(w.suffixHosts) == 0
+	return len(w.hosts) == 0
 }
 
 // Count returns the total number of whitelist entries.
 func (w *HostWhitelist) Count() int {
-	return len(w.exactHosts) + len(w.suffixHosts)
+	return len(w.hosts)
 }

internal/imgcache/whitelist_test.go

@@ -31,41 +31,47 @@ func TestHostWhitelist_IsWhitelisted(t *testing.T) {
 			want:     false,
 		},
 		{
-			name:     "suffix match",
+			name:     "dot prefix does not enable suffix matching",
 			patterns: []string{".example.com"},
 			testURL:  "https://cdn.example.com/image.jpg",
-			want:     true,
+			want:     false,
 		},
 		{
-			name:     "suffix match deep subdomain",
+			name:     "dot prefix does not match deep subdomain",
 			patterns: []string{".example.com"},
 			testURL:  "https://cdn.images.example.com/image.jpg",
-			want:     true,
+			want:     false,
 		},
 		{
-			name:     "suffix match apex domain",
+			name:     "dot prefix stripped matches apex domain exactly",
 			patterns: []string{".example.com"},
 			testURL:  "https://example.com/image.jpg",
 			want:     true,
 		},
 		{
-			name:     "suffix match not found",
+			name:     "dot prefix does not match unrelated domain",
 			patterns: []string{".example.com"},
 			testURL:  "https://notexample.com/image.jpg",
 			want:     false,
 		},
 		{
-			name:     "suffix match partial not allowed",
+			name:     "dot prefix does not match partial domain",
 			patterns: []string{".example.com"},
 			testURL:  "https://fakeexample.com/image.jpg",
 			want:     false,
 		},
 		{
-			name:     "multiple patterns",
-			patterns: []string{"cdn.example.com", ".images.org", "static.test.net"},
+			name:     "multiple patterns exact only",
+			patterns: []string{"cdn.example.com", "photos.images.org", "static.test.net"},
 			testURL:  "https://photos.images.org/image.jpg",
 			want:     true,
 		},
+		{
+			name:     "multiple patterns no suffix match",
+			patterns: []string{"cdn.example.com", ".images.org", "static.test.net"},
+			testURL:  "https://photos.images.org/image.jpg",
+			want:     false,
+		},
 		{
 			name:     "empty whitelist",
 			patterns: []string{},
@@ -90,6 +96,12 @@ func TestHostWhitelist_IsWhitelisted(t *testing.T) {
 			testURL:  "https://cdn.example.com/image.jpg",
 			want:     true,
 		},
+		{
+			name:     "whitespace dot prefix stripped matches exactly",
+			patterns: []string{"  .other.com  "},
+			testURL:  "https://other.com/image.jpg",
+			want:     true,
+		},
 	}
 
 	for _, tt := range tests {
@@ -139,6 +151,11 @@ func TestHostWhitelist_IsEmpty(t *testing.T) {
 			patterns: []string{"example.com"},
 			want:     false,
 		},
+		{
+			name:     "dot prefix entry still counts",
+			patterns: []string{".example.com"},
+			want:     false,
+		},
 	}
 
 	for _, tt := range tests {
@@ -168,7 +185,7 @@ func TestHostWhitelist_Count(t *testing.T) {
 			want:     3,
 		},
 		{
-			name:     "suffix hosts only",
+			name:     "dot prefix hosts treated as exact",
 			patterns: []string{".a.com", ".b.com"},
 			want:     2,
 		},
@@ -177,6 +194,11 @@ func TestHostWhitelist_Count(t *testing.T) {
 			patterns: []string{"exact.com", ".suffix.com"},
 			want:     2,
 		},
+		{
+			name:     "dot prefix deduplicates with exact",
+			patterns: []string{"example.com", ".example.com"},
+			want:     1,
+		},
 	}
 
 	for _, tt := range tests {