chore: bump version to v0.2.7

Reviewed-on: #100

.drone.jsonnet

@@ -8,7 +8,10 @@ local CreateRelease() = {
   settings: {
     api_key: { from_secret: 'GITEA_API_KEY' },
     base_url: 'https://git.unlock-music.dev',
-    files: 'dist/*',
+    files: [
+      'um-*.tar.gz',
+      'um-*.zip',
+    ],
     checksum: 'sha256',
     draft: true,
     title: '${DRONE_TAG}',
@@ -17,29 +20,41 @@ local CreateRelease() = {
 
 
 local StepGoBuild(GOOS, GOARCH) = {
-  local filepath = 'dist/um-%s-%s.tar.gz' % [GOOS, GOARCH],
+  local windows = GOOS == 'windows',
+  local archiveExt = if windows then 'zip' else 'tar.gz',
+  local filepath = 'dist/um-%s-%s-%s.%s' % [GOOS, GOARCH, '$(git describe --tags --always)', archiveExt],
+
+  local archive = if windows then [
+    // Ensure zip is installed
+    'command -v zip >/dev/null || (apt update && apt install -y zip)',
+    'zip -9 -j -r "%s" $DIST_DIR' % filepath,
+  ] else [
+    'tar -c -C $DIST_DIR um | gzip -9 > "%s"' % filepath,
+  ],
 
   name: 'go build %s/%s' % [GOOS, GOARCH],
-  image: 'golang:1.19',
+  image: 'golang:1.22',
   environment: {
     GOOS: GOOS,
     GOARCH: GOARCH,
+    GOPROXY: 'https://goproxy.io,direct',
   },
   commands: [
     'DIST_DIR=$(mktemp -d)',
     'go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags --always)" -o $DIST_DIR ./cmd/um',
     'mkdir -p dist',
-    'tar cz -f %s -C $DIST_DIR .' % filepath,
-  ],
+  ] + archive,
 };
 
 local StepUploadArtifact(GOOS, GOARCH) = {
-  local filename = 'um-%s-%s.tar.gz' % [GOOS, GOARCH],
+  local windows = GOOS == 'windows',
+  local archiveExt = if windows then 'zip' else 'tar.gz',
+  local filename = 'um-%s-%s-%s.%s' % [GOOS, GOARCH, '$(git describe --tags --always)', archiveExt],
   local filepath = 'dist/%s' % filename,
   local pkgname = '${DRONE_REPO_NAME}-build',
 
   name: 'upload artifact',
-  image: 'golang:1.19',  // reuse golang:1.19 for curl
+  image: 'golang:1.22',  // reuse golang:1.19 for curl
   environment: {
     DRONE_GITEA_SERVER: 'https://git.unlock-music.dev',
     GITEA_API_KEY: { from_secret: 'GITEA_API_KEY' },
@@ -68,7 +83,10 @@ local PipelineBuild(GOOS, GOARCH, RUN_TEST) = {
          (
            if RUN_TEST then [{
              name: 'go test',
-             image: 'golang:1.19',
+             image: 'golang:1.22',
+             environment: {
+               GOPROXY: 'https://goproxy.io,direct',
+             },
              commands: ['go test -v ./...'],
            }] else []
          )
@@ -94,16 +112,27 @@ local PipelineRelease() = {
     },
     {
       name: 'go test',
-      image: 'golang:1.19',
+      image: 'golang:1.22',
+      environment: {
+        GOPROXY: 'https://goproxy.io,direct',
+      },
       commands: ['go test -v ./...'],
     },
     StepGoBuild('linux', 'amd64'),
     StepGoBuild('linux', 'arm64'),
     StepGoBuild('linux', '386'),
     StepGoBuild('windows', 'amd64'),
+    StepGoBuild('windows', 'arm64'),
     StepGoBuild('windows', '386'),
     StepGoBuild('darwin', 'amd64'),
     StepGoBuild('darwin', 'arm64'),
+    {
+      name: 'prepare root',
+      image: 'golang:1.22',
+      commands: [
+        'mv dist/*.tar.gz dist/*.zip ./',
+      ],
+    },
     CreateRelease(),
   ],
   trigger: {

.drone.yml

@@ -8,29 +8,34 @@ steps:
   name: fetch tags
 - commands:
   - go test -v ./...
-  image: golang:1.19
+  environment:
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go test
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-linux-amd64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-amd64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: amd64
     GOOS: linux
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build linux/amd64
 - commands:
-  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-linux-amd64.tar.gz"
-    "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-linux-amd64.tar.gz"
-  - sha256sum dist/um-linux-amd64.tar.gz
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-linux-amd64-$(git
+    describe --tags --always).tar.gz" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-linux-amd64-$(git
+    describe --tags --always).tar.gz"
+  - sha256sum dist/um-linux-amd64-$(git describe --tags --always).tar.gz
   - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
   environment:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.19
+  image: golang:1.22
   name: upload artifact
 trigger:
   event:
@@ -50,22 +55,25 @@ steps:
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-windows-amd64.tar.gz -C $DIST_DIR .
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-amd64-$(git describe --tags --always).zip" $DIST_DIR
   environment:
     GOARCH: amd64
     GOOS: windows
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build windows/amd64
 - commands:
-  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-windows-amd64.tar.gz"
-    "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-windows-amd64.tar.gz"
-  - sha256sum dist/um-windows-amd64.tar.gz
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-windows-amd64-$(git
+    describe --tags --always).zip" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-windows-amd64-$(git
+    describe --tags --always).zip"
+  - sha256sum dist/um-windows-amd64-$(git describe --tags --always).zip
   - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
   environment:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.19
+  image: golang:1.22
   name: upload artifact
 trigger:
   event:
@@ -85,22 +93,25 @@ steps:
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-darwin-amd64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-amd64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: amd64
     GOOS: darwin
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build darwin/amd64
 - commands:
-  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-darwin-amd64.tar.gz"
-    "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-darwin-amd64.tar.gz"
-  - sha256sum dist/um-darwin-amd64.tar.gz
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-darwin-amd64-$(git
+    describe --tags --always).tar.gz" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-darwin-amd64-$(git
+    describe --tags --always).tar.gz"
+  - sha256sum dist/um-darwin-amd64-$(git describe --tags --always).tar.gz
   - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
   environment:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.19
+  image: golang:1.22
   name: upload artifact
 trigger:
   event:
@@ -117,85 +128,117 @@ steps:
   name: fetch tags
 - commands:
   - go test -v ./...
-  image: golang:1.19
+  environment:
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go test
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-linux-amd64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-amd64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: amd64
     GOOS: linux
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build linux/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-linux-arm64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-arm64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: arm64
     GOOS: linux
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build linux/arm64
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-linux-386.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-386-$(git describe --tags --always).tar.gz"
   environment:
     GOARCH: "386"
     GOOS: linux
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build linux/386
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-windows-amd64.tar.gz -C $DIST_DIR .
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-amd64-$(git describe --tags --always).zip" $DIST_DIR
   environment:
     GOARCH: amd64
     GOOS: windows
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build windows/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-windows-386.tar.gz -C $DIST_DIR .
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-arm64-$(git describe --tags --always).zip" $DIST_DIR
+  environment:
+    GOARCH: arm64
+    GOOS: windows
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
+  name: go build windows/arm64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-386-$(git describe --tags --always).zip" $DIST_DIR
   environment:
     GOARCH: "386"
     GOOS: windows
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build windows/386
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-darwin-amd64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-amd64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: amd64
     GOOS: darwin
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build darwin/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
   - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
     --always)" -o $DIST_DIR ./cmd/um
   - mkdir -p dist
-  - tar cz -f dist/um-darwin-arm64.tar.gz -C $DIST_DIR .
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-arm64-$(git describe --tags
+    --always).tar.gz"
   environment:
     GOARCH: arm64
     GOOS: darwin
-  image: golang:1.19
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.22
   name: go build darwin/arm64
+- commands:
+  - mv dist/*.tar.gz dist/*.zip ./
+  image: golang:1.22
+  name: prepare root
 - image: plugins/gitea-release
   name: create release
   settings:
@@ -204,7 +247,9 @@ steps:
     base_url: https://git.unlock-music.dev
     checksum: sha256
     draft: true
-    files: dist/*
+    files:
+    - um-*.tar.gz
+    - um-*.zip
     title: ${DRONE_TAG}
 trigger:
   event:

.gitignore

@@ -1,3 +1,7 @@
 .idea
 
 /dist
+*.exe
+
+/um-*.tar.gz
+/um-*.zip

README.md

@@ -6,6 +6,9 @@ Original: Web Edition https://git.unlock-music.dev/um/web
 - [Release Download](https://git.unlock-music.dev/um/cli/releases/latest)
 - [Latest Build](https://git.unlock-music.dev/um/-/packages/generic/cli-build/)
 
+> **WARNING**
+> 在本站 fork 不会起到备份的作用，只会浪费服务器储存空间。如无必要请勿 fork 该仓库。
+
 ## Features
 
 - [x] All Algorithm Supported By `unlock-music/web`
@@ -22,3 +25,13 @@ Original: Web Edition https://git.unlock-music.dev/um/web
 - Drag the encrypted file to `um.exe` (Tested on Windows)
 - Run: `./um [-o <output dir>] [-i] <input dir/file>`
 - Use `./um -h` to show help menu
+
+## Update CI pipeline
+
+1. Install [Drone CI binary](https://docs.drone.io/cli/install/)
+2. Edit `.drone.jsonnet`
+3. Update drone CI pipeline:
+
+   ```sh
+   drone jsonnet --format --stream
+   ```

algo/common/dispatch.go

@@ -18,25 +18,32 @@ type DecoderParams struct {
 }
 type NewDecoderFunc func(p *DecoderParams) Decoder
 
-type decoderItem struct {
-	noop    bool
-	decoder NewDecoderFunc
+type DecoderFactory struct {
+	noop   bool
+	Suffix string
+	Create NewDecoderFunc
 }
 
-var DecoderRegistry = make(map[string][]decoderItem)
+var DecoderRegistry []DecoderFactory
 
 func RegisterDecoder(ext string, noop bool, dispatchFunc NewDecoderFunc) {
-	DecoderRegistry[ext] = append(DecoderRegistry[ext],
-		decoderItem{noop: noop, decoder: dispatchFunc})
+	DecoderRegistry = append(DecoderRegistry,
+		DecoderFactory{noop: noop, Create: dispatchFunc, Suffix: "." + strings.TrimPrefix(ext, ".")})
 }
 
-func GetDecoder(filename string, skipNoop bool) (rs []NewDecoderFunc) {
-	ext := strings.ToLower(strings.TrimLeft(filepath.Ext(filename), "."))
-	for _, dec := range DecoderRegistry[ext] {
+func GetDecoder(filename string, skipNoop bool) []DecoderFactory {
+	var result []DecoderFactory
+	// Some extensions contains multiple dots, e.g. ".kgm.flac", hence iterate
+	//   all decoders for each extension.
+	name := strings.ToLower(filepath.Base(filename))
+	for _, dec := range DecoderRegistry {
+		if !strings.HasSuffix(name, dec.Suffix) {
+			continue
+		}
 		if skipNoop && dec.noop {
 			continue
 		}
-		rs = append(rs, dec.decoder)
+		result = append(result, dec)
 	}
-	return
+	return result
 }

algo/kgm/kgm.go

@@ -61,4 +61,7 @@ func init() {
 	common.RegisterDecoder("kgma", false, NewDecoder)
 	// Viper
 	common.RegisterDecoder("vpr", false, NewDecoder)
+	// Kugou Android
+	common.RegisterDecoder("kgm.flac", false, NewDecoder)
+	common.RegisterDecoder("vpr.flac", false, NewDecoder)
 }

algo/ncm/meta.go

@@ -18,14 +18,11 @@ type ncmMeta interface {
 
 type ncmMetaMusic struct {
 	Format        string          `json:"format"`
-	MusicID       int             `json:"musicId"`
 	MusicName     string          `json:"musicName"`
 	Artist        [][]interface{} `json:"artist"`
 	Album         string          `json:"album"`
-	AlbumID       int             `json:"albumId"`
 	AlbumPicDocID interface{}     `json:"albumPicDocId"`
 	AlbumPic      string          `json:"albumPic"`
-	MvID          int             `json:"mvId"`
 	Flag          int             `json:"flag"`
 	Bitrate       int             `json:"bitrate"`
 	Duration      int             `json:"duration"`

algo/ncm/ncm.go

@@ -149,12 +149,18 @@ func (d *Decoder) readMetaData() error {
 }
 
 func (d *Decoder) readCoverData() error {
-	bCoverCRC := make([]byte, 4)
-	if _, err := io.ReadFull(d.rd, bCoverCRC); err != nil {
-		return fmt.Errorf("ncm read cover crc: %w", err)
+	bCoverFrameLen := make([]byte, 4)
+	if _, err := io.ReadFull(d.rd, bCoverFrameLen); err != nil {
+		return fmt.Errorf("ncm read cover length: %w", err)
 	}
 
-	bCoverLen := make([]byte, 4) //
+	coverFrameStartOffset, err := d.rd.Seek(0, io.SeekCurrent)
+	if err != nil {
+		return fmt.Errorf("ncm fetch cover frame start offset: %w", err)
+	}
+	coverFrameLen := binary.LittleEndian.Uint32(bCoverFrameLen)
+
+	bCoverLen := make([]byte, 4)
 	if _, err := io.ReadFull(d.rd, bCoverLen); err != nil {
 		return fmt.Errorf("ncm read cover length: %w", err)
 	}
@@ -166,7 +172,10 @@ func (d *Decoder) readCoverData() error {
 	}
 	d.cover = coverBuf
 
-	return nil
+	offsetAudioData := coverFrameStartOffset + int64(coverFrameLen) + 4
+	_, err = d.rd.Seek(offsetAudioData, io.SeekStart)
+
+	return err
 }
 
 func (d *Decoder) parseMeta() error {

algo/qmc/key_mmkv.go

@@ -80,6 +80,39 @@ func readKeyFromMMKV(file string, logger *zap.Logger) ([]byte, error) {
 	return deriveKey(buf)
 }
 
+func OpenMMKV(mmkvPath string, key string, logger *zap.Logger) error {
+	filePath, fileName := filepath.Split(mmkvPath)
+	mgr, err := mmkv.NewManager(filepath.Dir(filePath))
+	if err != nil {
+		return fmt.Errorf("init mmkv manager: %w", err)
+	}
+
+	// If `vaultKey` is empty, the key is ignored.
+	streamKeyVault, err = mgr.OpenVaultCrypto(fileName, key)
+
+	if err != nil {
+		return fmt.Errorf("open mmkv vault: %w", err)
+	}
+
+	logger.Debug("mmkv vault opened", zap.Strings("keys", streamKeyVault.Keys()))
+	return nil
+}
+
+// /
+func readKeyFromMMKVCustom(mid string) ([]byte, error) {
+	if streamKeyVault == nil {
+		return nil, fmt.Errorf("mmkv vault not loaded")
+	}
+
+	// get ekey from mmkv vault
+	eKey, err := streamKeyVault.GetBytes(mid)
+	if err != nil {
+		return nil, fmt.Errorf("get eKey error: %w", err)
+	}
+	return deriveKey(eKey)
+}
+
+// / getRelativeMMKVDir get mmkv dir relative to file (legacy QQMusic for macOS behaviour)
 func getRelativeMMKVDir(file string) (string, error) {
 	mmkvDir := filepath.Join(filepath.Dir(file), "../mmkv")
 	if _, err := os.Stat(mmkvDir); err != nil {
@@ -102,7 +135,7 @@ func getDefaultMMKVDir() (string, error) {
 
 	mmkvDir := filepath.Join(
 		homeDir,
-		"Library/Containers/com.tencent.QQMusicMac/Data", // todo: make configurable
+		"Library/Containers/com.tencent.QQMusicMac/Data",
 		"Library/Application Support/QQMusicMac/mmkv",
 	)
 	if _, err := os.Stat(mmkvDir); err != nil {

algo/qmc/qmc.go

@@ -5,13 +5,12 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"go.uber.org/zap"
 	"io"
 	"runtime"
 	"strconv"
 	"strings"
 
-	"go.uber.org/zap"
-
 	"unlock-music.dev/cli/algo/common"
 	"unlock-music.dev/cli/internal/sniff"
 )
@@ -145,6 +144,17 @@ func (d *Decoder) searchKey() (err error) {
 		return d.readRawMetaQTag()
 	case "STag":
 		return errors.New("qmc: file with 'STag' suffix doesn't contains media key")
+	case "cex\x00":
+		footer, err := NewMusicExTag(d.raw)
+		if err != nil {
+			return err
+		}
+		d.audioLen = fileSize - int(footer.TagSize)
+		d.decodedKey, err = readKeyFromMMKVCustom(footer.MediaFileName)
+		if err != nil {
+			return err
+		}
+		return nil
 	default:
 		size := binary.LittleEndian.Uint32(suffixBuf)
 
@@ -244,12 +254,20 @@ func init() {
 		"6d3461",   //QQ Music Weiyun M4a
 		"776176",   //QQ Music Weiyun Wav
 
-		"mgg", "mgg1", "mggl", //QQ Music New Ogg
-		"mflac", "mflac0", "mflach", //QQ Music New Flac
-
 		"mmp4", // QQ Music MP4 Container, tipically used for Dolby EAC3 stream
 	}
 	for _, ext := range supportedExts {
 		common.RegisterDecoder(ext, false, NewDecoder)
 	}
+
+	// New ogg/flac:
+	extraExtsCanHaveSuffix := []string{"mgg", "mflac"}
+	// Mac also adds some extra suffix to ext:
+	extraExtSuffix := []string{"0", "1", "a", "h", "l"}
+	for _, ext := range extraExtsCanHaveSuffix {
+		common.RegisterDecoder(ext, false, NewDecoder)
+		for _, suffix := range extraExtSuffix {
+			common.RegisterDecoder(ext+suffix, false, NewDecoder)
+		}
+	}
 }

algo/qmc/qmc_footer_musicex.go

@@ -0,0 +1,93 @@
+package qmc
+
+import (
+	bytes "bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+)
+
+type MusicExTagV1 struct {
+	SongID        uint32 // Song ID
+	Unknown1      uint32 // unused & unknown
+	Unknown2      uint32 // unused & unknown
+	MediaID       string // Media ID
+	MediaFileName string // real file name
+	Unknown3      uint32 // unused; uninitialized memory?
+
+	// 16 byte at the end of tag.
+	// TagSize should be respected when parsing.
+	TagSize    uint32 // 19.57: fixed value: 0xC0
+	TagVersion uint32 // 19.57: fixed value: 0x01
+	TagMagic   []byte // fixed value "musicex\0" (8 bytes)
+}
+
+func NewMusicExTag(f io.ReadSeeker) (*MusicExTagV1, error) {
+	_, err := f.Seek(-16, io.SeekEnd)
+	if err != nil {
+		return nil, fmt.Errorf("musicex seek error: %w", err)
+	}
+
+	buffer := make([]byte, 16)
+	bytesRead, err := f.Read(buffer)
+	if err != nil {
+		return nil, fmt.Errorf("get musicex error: %w", err)
+	}
+	if bytesRead != 16 {
+		return nil, fmt.Errorf("MusicExV1: read %d bytes (expected %d)", bytesRead, 16)
+	}
+
+	tag := &MusicExTagV1{
+		TagSize:    binary.LittleEndian.Uint32(buffer[0x00:0x04]),
+		TagVersion: binary.LittleEndian.Uint32(buffer[0x04:0x08]),
+		TagMagic:   buffer[0x04:0x0C],
+	}
+
+	if !bytes.Equal(tag.TagMagic, []byte("musicex\x00")) {
+		return nil, errors.New("MusicEx magic mismatch")
+	}
+	if tag.TagVersion != 1 {
+		return nil, errors.New(fmt.Sprintf("unsupported musicex tag version. expecting 1, got %d", tag.TagVersion))
+	}
+
+	if tag.TagSize < 0xC0 {
+		return nil, errors.New(fmt.Sprintf("unsupported musicex tag size. expecting at least 0xC0, got 0x%02x", tag.TagSize))
+	}
+
+	buffer = make([]byte, tag.TagSize)
+	bytesRead, err = f.Read(buffer)
+	if err != nil {
+		return nil, err
+	}
+	if uint32(bytesRead) != tag.TagSize {
+		return nil, fmt.Errorf("MusicExV1: read %d bytes (expected %d)", bytesRead, tag.TagSize)
+	}
+
+	tag.SongID = binary.LittleEndian.Uint32(buffer[0x00:0x04])
+	tag.Unknown1 = binary.LittleEndian.Uint32(buffer[0x04:0x08])
+	tag.Unknown2 = binary.LittleEndian.Uint32(buffer[0x08:0x0C])
+	tag.MediaID = readUnicodeTagName(buffer[0x0C:], 30*2)
+	tag.MediaFileName = readUnicodeTagName(buffer[0x48:], 50*2)
+	tag.Unknown3 = binary.LittleEndian.Uint32(buffer[0xAC:0xB0])
+	return tag, nil
+}
+
+// readUnicodeTagName reads a buffer to maxLen.
+// reconstruct text by skipping alternate char (ascii chars encoded in UTF-16-LE),
+// until finding a zero or reaching maxLen.
+func readUnicodeTagName(buffer []byte, maxLen int) string {
+	builder := strings.Builder{}
+
+	for i := 0; i < maxLen; i += 2 {
+		chr := buffer[i]
+		if chr != 0 {
+			builder.WriteByte(chr)
+		} else {
+			break
+		}
+	}
+
+	return builder.String()
+}

cmd/um/main.go

@@ -7,6 +7,8 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"os/signal"
+	"path"
 	"path/filepath"
 	"runtime"
 	"runtime/debug"
@@ -14,6 +16,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/fsnotify/fsnotify"
 	"github.com/urfave/cli/v2"
 	"go.uber.org/zap"
 
@@ -21,7 +24,7 @@ import (
 	_ "unlock-music.dev/cli/algo/kgm"
 	_ "unlock-music.dev/cli/algo/kwm"
 	_ "unlock-music.dev/cli/algo/ncm"
-	_ "unlock-music.dev/cli/algo/qmc"
+	"unlock-music.dev/cli/algo/qmc"
 	_ "unlock-music.dev/cli/algo/tm"
 	_ "unlock-music.dev/cli/algo/xiami"
 	_ "unlock-music.dev/cli/algo/ximalaya"
@@ -31,7 +34,7 @@ import (
 	"unlock-music.dev/cli/internal/utils"
 )
 
-var AppVersion = "v0.0.6"
+var AppVersion = "v0.2.7"
 
 var logger, _ = logging.NewZapLogger() // TODO: inject logger to application, instead of using global logger
 
@@ -48,9 +51,13 @@ func main() {
 		Flags: []cli.Flag{
 			&cli.StringFlag{Name: "input", Aliases: []string{"i"}, Usage: "path to input file or dir", Required: false},
 			&cli.StringFlag{Name: "output", Aliases: []string{"o"}, Usage: "path to output dir", Required: false},
+			&cli.StringFlag{Name: "qmc-mmkv", Aliases: []string{"db"}, Usage: "path to qmc mmkv (.crc file also required)", Required: false},
+			&cli.StringFlag{Name: "qmc-mmkv-key", Aliases: []string{"key"}, Usage: "mmkv password (16 ascii chars)", Required: false},
 			&cli.BoolFlag{Name: "remove-source", Aliases: []string{"rs"}, Usage: "remove source file", Required: false, Value: false},
 			&cli.BoolFlag{Name: "skip-noop", Aliases: []string{"n"}, Usage: "skip noop decoder", Required: false, Value: true},
 			&cli.BoolFlag{Name: "update-metadata", Usage: "update metadata & album art from network", Required: false, Value: false},
+			&cli.BoolFlag{Name: "overwrite", Usage: "overwrite output file without asking", Required: false, Value: false},
+			&cli.BoolFlag{Name: "watch", Usage: "watch the input dir and process new files", Required: false, Value: false},
 
 			&cli.BoolFlag{Name: "supported-ext", Usage: "show supported file extensions and exit", Required: false, Value: false},
 		},
@@ -65,17 +72,33 @@ func main() {
 		logger.Fatal("run app failed", zap.Error(err))
 	}
 }
+
 func printSupportedExtensions() {
 	var exts []string
-	for ext := range common.DecoderRegistry {
+	extSet := make(map[string]int)
+	for _, factory := range common.DecoderRegistry {
+		ext := strings.TrimPrefix(factory.Suffix, ".")
+		if n, ok := extSet[ext]; ok {
+			extSet[ext] = n + 1
+		} else {
+			extSet[ext] = 1
+		}
+	}
+	for ext := range extSet {
 		exts = append(exts, ext)
 	}
 	sort.Strings(exts)
 	for _, ext := range exts {
-		fmt.Printf("%s: %d\n", ext, len(common.DecoderRegistry[ext]))
+		fmt.Printf("%s: %d\n", ext, extSet[ext])
 	}
 }
+
 func appMain(c *cli.Context) (err error) {
+	cwd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
 	if c.Bool("supported-ext") {
 		printSupportedExtensions()
 		return nil
@@ -84,10 +107,7 @@ func appMain(c *cli.Context) (err error) {
 	if input == "" {
 		switch c.Args().Len() {
 		case 0:
-			input, err = os.Getwd()
-			if err != nil {
-				return err
-			}
+			input = cwd
 		case 1:
 			input = c.Args().Get(0)
 		default:
@@ -96,22 +116,20 @@ func appMain(c *cli.Context) (err error) {
 	}
 
 	output := c.String("output")
-	if output == "" {
-		var err error
-		output, err = os.Getwd()
-		if err != nil {
-			return err
-		}
-		if input == output {
-			return errors.New("input and output path are same")
-		}
-	}
-
 	inputStat, err := os.Stat(input)
 	if err != nil {
 		return err
 	}
 
+	if output == "" {
+		// Default to where the input is
+		if inputStat.IsDir() {
+			output = input
+		} else {
+			output = path.Dir(input)
+		}
+	}
+
 	outputStat, err := os.Stat(output)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
@@ -124,15 +142,31 @@ func appMain(c *cli.Context) (err error) {
 		return errors.New("output should be a writable directory")
 	}
 
+	if mmkv := c.String("qmc-mmkv"); mmkv != "" {
+		// If key is not set, the mmkv vault will be treated as unencrypted.
+		key := c.String("qmc-mmkv-key")
+		err := qmc.OpenMMKV(mmkv, key, logger)
+		if err != nil {
+			return err
+		}
+	}
+
 	proc := &processor{
+		inputDir:        input,
 		outputDir:       output,
 		skipNoopDecoder: c.Bool("skip-noop"),
 		removeSource:    c.Bool("remove-source"),
 		updateMetadata:  c.Bool("update-metadata"),
+		overwriteOutput: c.Bool("overwrite"),
 	}
 
 	if inputStat.IsDir() {
-		return proc.processDir(input)
+		watchDir := c.Bool("watch")
+		if !watchDir {
+			return proc.processDir(input)
+		} else {
+			return proc.watchDir(input)
+		}
 	} else {
 		return proc.processFile(input)
 	}
@@ -140,11 +174,67 @@ func appMain(c *cli.Context) (err error) {
 }
 
 type processor struct {
+	inputDir  string
 	outputDir string
 
 	skipNoopDecoder bool
 	removeSource    bool
 	updateMetadata  bool
+	overwriteOutput bool
+}
+
+func (p *processor) watchDir(inputDir string) error {
+	if err := p.processDir(inputDir); err != nil {
+		return err
+	}
+
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return fmt.Errorf("failed to create watcher: %w", err)
+	}
+	defer watcher.Close()
+
+	go func() {
+		for {
+			select {
+			case event, ok := <-watcher.Events:
+				if !ok {
+					return
+				}
+
+				if event.Has(fsnotify.Create) || event.Has(fsnotify.Write) {
+					// try open with exclusive mode, to avoid file is still writing
+					f, err := os.OpenFile(event.Name, os.O_RDONLY, os.ModeExclusive)
+					if err != nil {
+						logger.Debug("failed to open file exclusively", zap.String("path", event.Name), zap.Error(err))
+						time.Sleep(1 * time.Second) // wait for file writing complete
+						continue
+					}
+					_ = f.Close()
+
+					if err := p.processFile(event.Name); err != nil {
+						logger.Warn("failed to process file", zap.String("path", event.Name), zap.Error(err))
+					}
+				}
+			case err, ok := <-watcher.Errors:
+				if !ok {
+					return
+				}
+				logger.Error("file watcher got error", zap.Error(err))
+			}
+		}
+	}()
+
+	err = watcher.Add(inputDir)
+	if err != nil {
+		return fmt.Errorf("failed to watch dir %s: %w", inputDir, err)
+	}
+
+	signalCtx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer stop()
+
+	<-signalCtx.Done()
+	return nil
 }
 
 func (p *processor) processDir(inputDir string) error {
@@ -152,34 +242,62 @@ func (p *processor) processDir(inputDir string) error {
 	if err != nil {
 		return err
 	}
+
+	var lastError error = nil
 	for _, item := range items {
-		if item.IsDir() {
-			continue
-		}
-
 		filePath := filepath.Join(inputDir, item.Name())
-		allDec := common.GetDecoder(filePath, p.skipNoopDecoder)
-		if len(allDec) == 0 {
-			logger.Info("skipping while no suitable decoder", zap.String("source", item.Name()))
+		if item.IsDir() {
+			if err = p.processDir(filePath); err != nil {
+				lastError = err
+			}
 			continue
 		}
 
-		if err := p.process(filePath, allDec); err != nil {
+		if err := p.processFile(filePath); err != nil {
+			lastError = err
 			logger.Error("conversion failed", zap.String("source", item.Name()), zap.Error(err))
 		}
 	}
+	if lastError != nil {
+		return fmt.Errorf("last error: %w", lastError)
+	}
 	return nil
 }
 
 func (p *processor) processFile(filePath string) error {
 	allDec := common.GetDecoder(filePath, p.skipNoopDecoder)
 	if len(allDec) == 0 {
-		logger.Fatal("skipping while no suitable decoder")
+		return errors.New("skipping while no suitable decoder")
 	}
-	return p.process(filePath, allDec)
+
+	if err := p.process(filePath, allDec); err != nil {
+		return err
+	}
+
+	// if source file need to be removed
+	if p.removeSource {
+		err := os.RemoveAll(filePath)
+		if err != nil {
+			return err
+		}
+		logger.Info("source file removed after success conversion", zap.String("source", filePath))
+	}
+	return nil
 }
 
-func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) error {
+func (p *processor) findDecoder(decoders []common.DecoderFactory, params *common.DecoderParams) (*common.Decoder, *common.DecoderFactory, error) {
+	for _, factory := range decoders {
+		dec := factory.Create(params)
+		err := dec.Validate()
+		if err == nil {
+			return &dec, &factory, nil
+		}
+		logger.Warn("try decode failed", zap.Error(err))
+	}
+	return nil, nil, errors.New("no any decoder can resolve the file")
+}
+
+func (p *processor) process(inputFile string, allDec []common.DecoderFactory) error {
 	file, err := os.Open(inputFile)
 	if err != nil {
 		return err
@@ -187,26 +305,16 @@ func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) er
 	defer file.Close()
 	logger := logger.With(zap.String("source", inputFile))
 
-	decParams := &common.DecoderParams{
+	pDec, decoderFactory, err := p.findDecoder(allDec, &common.DecoderParams{
 		Reader:    file,
 		Extension: filepath.Ext(inputFile),
 		FilePath:  inputFile,
 		Logger:    logger,
+	})
+	if err != nil {
+		return err
 	}
-
-	var dec common.Decoder
-	for _, decFunc := range allDec {
-		dec = decFunc(decParams)
-		if err := dec.Validate(); err == nil {
-			break
-		} else {
-			logger.Warn("try decode failed", zap.Error(err))
-			dec = nil
-		}
-	}
-	if dec == nil {
-		return errors.New("no any decoder can resolve the file")
-	}
+	dec := *pDec
 
 	params := &ffmpeg.UpdateMetadataParams{}
 
@@ -263,8 +371,23 @@ func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) er
 		}
 	}
 
-	inFilename := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
-	outPath := filepath.Join(p.outputDir, inFilename+params.AudioExt)
+	inputRelDir, err := filepath.Rel(p.inputDir, filepath.Dir(inputFile))
+	if err != nil {
+		return fmt.Errorf("get relative dir failed: %w", err)
+	}
+
+	inFilename := strings.TrimSuffix(filepath.Base(inputFile), decoderFactory.Suffix)
+	outPath := filepath.Join(p.outputDir, inputRelDir, inFilename+params.AudioExt)
+
+	if !p.overwriteOutput {
+		_, err := os.Stat(outPath)
+		if err == nil {
+			logger.Warn("output file already exist, skip", zap.String("destination", outPath))
+			return nil
+		} else if !errors.Is(err, os.ErrNotExist) {
+			return fmt.Errorf("stat output file failed: %w", err)
+		}
+	}
 
 	if params.Meta == nil {
 		outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
@@ -276,8 +399,6 @@ func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) er
 		if _, err := io.Copy(outFile, audio); err != nil {
 			return err
 		}
-		outFile.Close()
-
 	} else {
 		ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 		defer cancel()
@@ -287,16 +408,6 @@ func (p *processor) process(inputFile string, allDec []common.NewDecoderFunc) er
 		}
 	}
 
-	// if source file need to be removed
-	if p.removeSource {
-		err := os.RemoveAll(inputFile)
-		if err != nil {
-			return err
-		}
-		logger.Info("successfully converted, and source file is removed", zap.String("source", inputFile), zap.String("destination", outPath))
-	} else {
-		logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
-	}
-
+	logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
 	return nil
 }

go.mod

@@ -3,24 +3,24 @@ module unlock-music.dev/cli
 go 1.19
 
 require (
-	github.com/go-flac/flacpicture v0.2.0
-	github.com/go-flac/flacvorbis v0.1.0
-	github.com/go-flac/go-flac v0.3.1
-	github.com/samber/lo v1.36.0
-	github.com/urfave/cli/v2 v2.23.6
-	go.uber.org/zap v1.24.0
-	golang.org/x/crypto v0.3.0
-	golang.org/x/exp v0.0.0-20221205204356-47842c84f3db
-	golang.org/x/text v0.5.0
-	unlock-music.dev/mmkv v0.0.0-20221204231432-41a75bd29939
+	github.com/fsnotify/fsnotify v1.7.0
+	github.com/go-flac/flacpicture v0.3.0
+	github.com/go-flac/flacvorbis v0.2.0
+	github.com/go-flac/go-flac v1.0.0
+	github.com/samber/lo v1.39.0
+	github.com/urfave/cli/v2 v2.27.1
+	go.uber.org/zap v1.27.0
+	golang.org/x/crypto v0.26.0
+	golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f
+	golang.org/x/text v0.17.0
+	unlock-music.dev/mmkv v0.0.0-20240424090133-31549c6a948b
 )
 
 require (
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
-	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/multierr v1.8.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/sys v0.23.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 )

go.sum

@@ -1,61 +1,47 @@
-github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
-github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
-github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/ddliu/go-httpclient v0.5.1 h1:ys4KozrhBaGdI1yuWIFwNNILqhnMU9ozTvRNfCTorvs=
-github.com/ddliu/go-httpclient v0.5.1/go.mod h1:8QVbjq00YK2f2MQyiKuWMdaKOFRcoD9VuubkNCNOuZo=
-github.com/go-flac/flacpicture v0.2.0 h1:rS/ZOR/ZxlEwMf3yOPFcTAmGyoV6rDtcYdd+6CwWQAw=
-github.com/go-flac/flacpicture v0.2.0/go.mod h1:M4a1J0v6B5NHsck4GA1yZg0vFQzETVPd3kuj6Ow+q9o=
-github.com/go-flac/flacvorbis v0.1.0 h1:xStJfPrZ/IoA2oBUEwgrlaSf+Opo6/YuQfkqVhkP0cM=
-github.com/go-flac/flacvorbis v0.1.0/go.mod h1:70N9vVkQ4Jew0oBWkwqDMIE21h7pMUtQJpnMD0js6XY=
-github.com/go-flac/go-flac v0.3.1 h1:BWA7HdO67S4ZLWSVHCxsDHuedFFu5RiV/wmuhvO6Hxo=
-github.com/go-flac/go-flac v0.3.1/go.mod h1:jG9IumOfAXr+7J40x0AiQIbJzXf9Y7+Zs/2CNWe4LMk=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
-github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
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internal/sniff/image.go

@@ -3,7 +3,7 @@ package sniff
 // ref: https://mimesniff.spec.whatwg.org
 var imageMIMEs = map[string]Sniffer{
 	"image/jpeg": prefixSniffer{0xFF, 0xD8, 0xFF},
-	"image/png":  prefixSniffer{'P', 'N', 'G', '\r', '\n', 0x1A, '\n'},
+	"image/png":  prefixSniffer{0x89, 'P', 'N', 'G', '\r', '\n', 0x1A, '\n'},
 	"image/bmp":  prefixSniffer("BM"),
 	"image/webp": prefixSniffer("RIFF"),
 	"image/gif":  prefixSniffer("GIF8"),