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