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|
package storage
import (
"fmt"
"os"
"path/filepath"
"strings"
"golang.org/x/sys/unix"
"gitlab.com/gitlab-org/gitlab-pages/internal/client"
)
type fileSystem struct {
*client.LookupPath
}
func (f *fileSystem) rootPath() string {
fullPath, err := filepath.EvalSymlinks(filepath.Join(f.DiskPath))
if err != nil {
return ""
}
return fullPath
}
func (f *fileSystem) resolvePath(path string) (string, error) {
fullPath := filepath.Join(f.rootPath(), path)
fullPath, err := filepath.EvalSymlinks(fullPath)
if err != nil {
return "", err
}
// The requested path resolved to somewhere outside of the root directory
if !strings.HasPrefix(fullPath, f.rootPath()) {
return "", fmt.Errorf("%q should be in %q", fullPath, f.rootPath())
}
return fullPath, nil
}
func (f *fileSystem) Resolve(path string) (string, error) {
fullPath, err := f.resolvePath(path)
if err != nil {
return "", err
}
return fullPath[len(f.rootPath()):], nil
}
func (f *fileSystem) Stat(path string) (os.FileInfo, error) {
fullPath, err := f.resolvePath(path)
if err != nil {
return nil, err
}
return os.Lstat(fullPath)
}
func (f *fileSystem) Open(path string) (File, os.FileInfo, error) {
fullPath, err := f.resolvePath(path)
if err != nil {
return nil, nil, err
}
file, err := os.OpenFile(fullPath, os.O_RDONLY|unix.O_NOFOLLOW, 0)
if err != nil {
return nil, nil, err
}
fileInfo, err := file.Stat()
if err != nil {
file.Close()
return nil, nil, err
}
return file, fileInfo, err
}
func (f *fileSystem) Close() {
}
|
