feat(settings): manage shared interface and editor fonts
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@@ -0,0 +1,254 @@
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package api
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import (
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"crypto/sha256"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"net/http"
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"os"
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"path/filepath"
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"regexp"
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"strings"
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"rawmark/internal/events"
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)
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const maxFontBytes = 30 << 20
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var fontIDPattern = regexp.MustCompile(`^custom-[a-f0-9]{64}$`)
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type fontInfo struct {
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ID string `json:"id"`
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Name string `json:"name"`
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Format string `json:"format"`
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}
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func (s *Server) openFont(id string) (*os.Root, fontInfo, error) {
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var info fontInfo
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if !fontIDPattern.MatchString(id) || s.FontsDir == "" {
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return nil, info, fs.ErrNotExist
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}
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root, err := os.OpenRoot(s.FontsDir)
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if err != nil {
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return nil, info, err
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}
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defer root.Close()
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dir, err := root.OpenRoot(id)
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if err != nil {
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return nil, info, err
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}
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data, err := dir.ReadFile("manifest.json")
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if err == nil {
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err = json.Unmarshal(data, &info)
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}
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if err == nil && (info.ID != id || info.Name == "" || !validFontFormat(info.Format)) {
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err = fmt.Errorf("字体安装信息无效")
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}
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if err != nil {
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dir.Close()
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return nil, info, err
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}
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return dir, info, nil
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}
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func validFontFormat(format string) bool {
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return format == "ttf" || format == "otf" || format == "woff" || format == "woff2"
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}
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func (s *Server) listFonts(w http.ResponseWriter, r *http.Request) {
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s.settingsMu.Lock()
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defer s.settingsMu.Unlock()
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fonts := []fontInfo{}
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if s.FontsDir != "" {
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entries, err := os.ReadDir(s.FontsDir)
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if err != nil && !errors.Is(err, fs.ErrNotExist) {
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internalError(w, r, err)
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return
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}
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for _, entry := range entries {
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if !entry.IsDir() || !fontIDPattern.MatchString(entry.Name()) {
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continue
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}
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dir, info, err := s.openFont(entry.Name())
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if err != nil {
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internalError(w, r, err)
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return
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}
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dir.Close()
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fonts = append(fonts, info)
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}
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}
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writeJSON(w, 200, map[string]any{"fonts": fonts})
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}
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func (s *Server) importFont(w http.ResponseWriter, r *http.Request) {
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r.Body = http.MaxBytesReader(w, r.Body, maxFontBytes+(1<<20))
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if err := r.ParseMultipartForm(1 << 20); err != nil {
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writeError(w, 400, "无法读取字体文件，单个文件上限 30 MB")
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return
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}
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defer r.MultipartForm.RemoveAll()
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f, header, err := r.FormFile("file")
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if err != nil {
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writeError(w, 400, "请选择字体文件")
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return
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}
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defer f.Close()
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format := strings.TrimPrefix(strings.ToLower(filepath.Ext(header.Filename)), ".")
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data, err := io.ReadAll(io.LimitReader(f, maxFontBytes+1))
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if err != nil {
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internalError(w, r, err)
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return
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}
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if len(data) > maxFontBytes {
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writeError(w, 413, "字体文件超过 30 MB")
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return
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}
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magic := map[string]string{"ttf": "\x00\x01\x00\x00", "otf": "OTTO", "woff": "wOFF", "woff2": "wOF2"}
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if !validFontFormat(format) || len(data) < 12 || string(data[:4]) != magic[format] {
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writeError(w, 400, "请导入有效的 TTF、OTF、WOFF 或 WOFF2 字体文件")
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return
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}
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if s.FontsDir == "" {
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writeError(w, 503, "字体目录未配置")
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return
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}
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hash := sha256.Sum256(data)
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id := "custom-" + hex.EncodeToString(hash[:])
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info := fontInfo{id, strings.TrimSuffix(filepath.Base(header.Filename), filepath.Ext(header.Filename)), format}
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if strings.TrimSpace(info.Name) == "" || len(info.Name) > 200 || strings.ContainsAny(info.Name, "\x00\r\n") {
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writeError(w, 400, "字体文件名无效或过长")
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return
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}
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s.settingsMu.Lock()
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defer s.settingsMu.Unlock()
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if dir, existing, err := s.openFont(id); err == nil {
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dir.Close()
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writeJSON(w, 200, existing)
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return
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} else if !errors.Is(err, fs.ErrNotExist) {
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internalError(w, r, err)
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return
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}
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if err := os.MkdirAll(s.FontsDir, 0o755); err != nil {
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internalError(w, r, err)
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return
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}
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stage, err := os.MkdirTemp(s.FontsDir, ".import-")
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if err != nil {
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internalError(w, r, err)
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return
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}
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defer os.RemoveAll(stage)
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manifest, err := json.Marshal(info)
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if err == nil {
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err = os.WriteFile(filepath.Join(stage, "manifest.json"), manifest, 0o600)
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}
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if err == nil {
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err = os.WriteFile(filepath.Join(stage, "font."+format), data, 0o600)
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}
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if err == nil {
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err = os.Rename(stage, filepath.Join(s.FontsDir, id))
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}
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if err != nil {
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internalError(w, r, err)
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return
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}
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s.hub.Broadcast(events.Event{Type: "settings"})
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writeJSON(w, 201, info)
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}
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func (s *Server) fontFile(w http.ResponseWriter, r *http.Request) {
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s.settingsMu.Lock()
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dir, info, err := s.openFont(r.PathValue("id"))
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if errors.Is(err, fs.ErrNotExist) {
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s.settingsMu.Unlock()
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writeError(w, 404, "字体不存在")
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return
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}
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if err != nil {
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s.settingsMu.Unlock()
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internalError(w, r, err)
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return
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}
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defer dir.Close()
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f, err := dir.Open("font." + info.Format)
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s.settingsMu.Unlock()
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if err != nil {
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internalError(w, r, err)
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return
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}
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defer f.Close()
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stat, err := f.Stat()
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if err != nil || !stat.Mode().IsRegular() {
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if err == nil {
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err = fmt.Errorf("字体必须为普通文件")
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}
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internalError(w, r, err)
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return
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}
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w.Header().Set("Content-Type", "font/"+info.Format)
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http.ServeContent(w, r, "font."+info.Format, stat.ModTime(), f)
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}
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func (s *Server) deleteFont(w http.ResponseWriter, r *http.Request) {
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id := r.PathValue("id")
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if id == "maple" {
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writeError(w, 400, "Maple 是默认字体，不可删除")
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return
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}
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s.settingsMu.Lock()
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defer s.settingsMu.Unlock()
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dir, _, err := s.openFont(id)
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if errors.Is(err, fs.ErrNotExist) {
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writeError(w, 404, "字体不存在")
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return
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}
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if err != nil {
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internalError(w, r, err)
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return
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}
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dir.Close()
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settings, err := s.readSettings()
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if err != nil {
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internalError(w, r, err)
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return
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}
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for _, key := range []string{"uiFont", "textFont", "codeFont"} {
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var selected string
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if json.Unmarshal(settings[key], &selected) == nil && selected == id {
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settings[key] = json.RawMessage(`"maple"`)
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}
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}
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data, err := json.Marshal(settings)
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if err != nil {
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internalError(w, r, err)
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return
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}
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root, err := os.OpenRoot(s.FontsDir)
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if err != nil {
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internalError(w, r, err)
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return
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}
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defer root.Close()
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// 先撤下资源；设置写失败时恢复，避免留下指向已删除字体的设置。
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removed := ".remove-" + id
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if err := root.Rename(id, removed); err != nil {
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internalError(w, r, err)
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return
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}
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if err := s.store.SetSetting(settingsKey, string(data)); err != nil {
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internalError(w, r, errors.Join(err, root.Rename(removed, id)))
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return
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}
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s.hub.Broadcast(events.Event{Type: "settings"})
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if err := root.RemoveAll(removed); err != nil {
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internalError(w, r, fmt.Errorf("字体已停用，但文件清理失败：%w", err))
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return
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}
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writeJSON(w, 200, map[string]bool{"ok": true})
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}
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