144 lines
3.4 KiB
Go
144 lines
3.4 KiB
Go
package http
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import (
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"errors"
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"net/http"
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"path"
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"path/filepath"
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"strings"
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"github.com/spf13/afero"
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"golang.org/x/crypto/bcrypt"
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"github.com/filebrowser/filebrowser/v2/files"
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"github.com/filebrowser/filebrowser/v2/share"
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)
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var withHashFile = func(fn handleFunc) handleFunc {
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return func(w http.ResponseWriter, r *http.Request, d *data) (int, error) {
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id, ifPath := ifPathWithName(r)
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link, err := d.store.Share.GetByHash(id)
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if err != nil {
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return errToStatus(err), err
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}
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status, err := authenticateShareRequest(r, link)
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if status != 0 || err != nil {
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return status, err
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}
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user, err := d.store.Users.Get(d.server.Root, link.UserID)
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if err != nil {
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return errToStatus(err), err
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}
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d.user = user
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file, err := files.NewFileInfo(files.FileOptions{
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Fs: d.user.Fs,
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Path: link.Path,
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Modify: d.user.Perm.Modify,
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Expand: true,
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ReadHeader: d.server.TypeDetectionByHeader,
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Checker: d,
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Token: link.Token,
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})
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if err != nil {
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return errToStatus(err), err
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}
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// share base path
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basePath := link.Path
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// file relative path
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filePath := ""
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if file.IsDir {
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basePath = filepath.Dir(basePath)
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filePath = ifPath
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}
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// set fs root to the shared file/folder
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d.user.Fs = afero.NewBasePathFs(d.user.Fs, basePath)
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file, err = files.NewFileInfo(files.FileOptions{
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Fs: d.user.Fs,
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Path: filePath,
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Modify: d.user.Perm.Modify,
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Expand: true,
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Checker: d,
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Token: link.Token,
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})
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if err != nil {
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return errToStatus(err), err
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}
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d.raw = file
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return fn(w, r, d)
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}
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}
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// ref to https://github.com/filebrowser/filebrowser/pull/727
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// `/api/public/dl/MEEuZK-v/file-name.txt` for old browsers to save file with correct name
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func ifPathWithName(r *http.Request) (id, filePath string) {
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pathElements := strings.Split(r.URL.Path, "/")
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// prevent maliciously constructed parameters like `/api/public/dl/XZzCDnK2_not_exists_hash_name`
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// len(pathElements) will be 1, and golang will panic `runtime error: index out of range`
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switch len(pathElements) {
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case 1:
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return r.URL.Path, "/"
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default:
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return pathElements[0], path.Join("/", path.Join(pathElements[1:]...))
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}
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}
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var publicShareHandler = withHashFile(func(w http.ResponseWriter, r *http.Request, d *data) (int, error) {
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file := d.raw.(*files.FileInfo)
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if file.IsDir {
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file.Listing.Sorting = files.Sorting{By: "name", Asc: false}
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file.Listing.ApplySort()
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return renderJSON(w, r, file)
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}
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return renderJSON(w, r, file)
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})
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var publicDlHandler = withHashFile(func(w http.ResponseWriter, r *http.Request, d *data) (int, error) {
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file := d.raw.(*files.FileInfo)
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if !file.IsDir {
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return rawFileHandler(w, r, file)
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}
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return rawDirHandler(w, r, d, file)
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})
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func authenticateShareRequest(r *http.Request, l *share.Link) (int, error) {
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if l.PasswordHash == "" {
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return 0, nil
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}
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if r.URL.Query().Get("token") == l.Token {
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return 0, nil
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}
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password := r.Header.Get("X-SHARE-PASSWORD")
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if password == "" {
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return http.StatusUnauthorized, nil
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}
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if err := bcrypt.CompareHashAndPassword([]byte(l.PasswordHash), []byte(password)); err != nil {
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if errors.Is(err, bcrypt.ErrMismatchedHashAndPassword) {
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return http.StatusUnauthorized, nil
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}
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return 0, err
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}
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return 0, nil
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}
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func healthHandler(w http.ResponseWriter, _ *http.Request) {
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte(`{"status":"OK"}`))
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}
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