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- package http
- import (
- "io/fs"
- "net/http"
- "os"
- "path"
- "strings"
- "time"
- )
- type (
- FS struct {
- fs http.FileSystem
- modtime time.Time
- prefix string
- indexFile string
- denyDirectory bool
- }
- File struct {
- fp http.File
- modtime time.Time
- }
- FileInfo struct {
- name string
- size int64
- mode fs.FileMode
- isDir bool
- modtime time.Time
- }
- )
- func (fi *FileInfo) Name() string {
- return fi.name
- }
- func (fi *FileInfo) Size() int64 {
- return fi.size
- }
- func (fi *FileInfo) Mode() fs.FileMode {
- return fi.mode
- }
- func (fi *FileInfo) ModTime() time.Time {
- return fi.modtime
- }
- func (fi *FileInfo) IsDir() bool {
- return fi.isDir
- }
- func (fi *FileInfo) Sys() any {
- return nil
- }
- func (file *File) Close() error {
- return file.fp.Close()
- }
- func (file *File) Read(p []byte) (n int, err error) {
- return file.fp.Read(p)
- }
- func (file *File) Seek(offset int64, whence int) (int64, error) {
- return file.fp.Seek(offset, whence)
- }
- func (file *File) Readdir(count int) ([]fs.FileInfo, error) {
- return file.fp.Readdir(count)
- }
- func (file *File) Stat() (fs.FileInfo, error) {
- fi, err := file.fp.Stat()
- if err != nil {
- return nil, err
- }
- return newFileInfo(fi, file.modtime), nil
- }
- func (fs *FS) DenyAccessDirectory() {
- fs.denyDirectory = true
- }
- func (fs *FS) SetPrefix(prefix string) {
- if prefix != "" {
- if prefix[0] != '/' {
- prefix = "/" + prefix
- }
- prefix = strings.TrimRight(prefix, "/")
- fs.prefix = prefix
- }
- }
- func (fs *FS) SetIndexFile(indexFile string) {
- fs.indexFile = indexFile
- }
- func (fs *FS) Open(name string) (http.File, error) {
- var (
- needRetry bool
- )
- if name == "" || name == "/" {
- needRetry = true
- }
- if fs.prefix != "" {
- if !strings.HasPrefix(name, fs.prefix) {
- name = path.Join(fs.prefix, name)
- }
- }
- fp, err := fs.fs.Open(name)
- if err != nil {
- return nil, err
- }
- if fs.denyDirectory {
- state, err := fp.Stat()
- if err != nil {
- return nil, err
- }
- if state.IsDir() {
- if needRetry {
- if fs.indexFile != "" {
- return fs.Open(path.Join(name, fs.indexFile))
- }
- }
- return nil, os.ErrPermission
- }
- }
- return &File{fp: fp, modtime: fs.modtime}, nil
- }
- func newFS(modtime time.Time, fs http.FileSystem) *FS {
- return &FS{
- fs: fs,
- modtime: modtime,
- }
- }
- func newFileInfo(fi fs.FileInfo, modtime time.Time) *FileInfo {
- return &FileInfo{
- name: fi.Name(),
- size: fi.Size(),
- mode: fi.Mode(),
- isDir: fi.IsDir(),
- modtime: modtime,
- }
- }
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