Beego/fs.go

75 lines
1.8 KiB
Go

package beego
import (
"net/http"
"os"
"path/filepath"
)
type FileSystem struct {
}
func (d FileSystem) Open(name string) (http.File, error) {
return os.Open(name)
}
// Walk walks the file tree rooted at root in filesystem, calling walkFn for each file or
// directory in the tree, including root. All errors that arise visiting files
// and directories are filtered by walkFn.
func Walk(fs http.FileSystem, root string, walkFn filepath.WalkFunc) error {
f, err := fs.Open(root)
if err != nil {
return err
}
info, err := f.Stat()
if err != nil {
err = walkFn(root, nil, err)
} else {
err = walk(fs, root, info, walkFn)
}
if err == filepath.SkipDir {
return nil
}
return err
}
// walk recursively descends path, calling walkFn.
func walk(fs http.FileSystem, path string, info os.FileInfo, walkFn filepath.WalkFunc) error {
var err error
if !info.IsDir() {
return walkFn(path, info, nil)
}
dir, err := fs.Open(path)
if err != nil {
if err1 := walkFn(path, info, err); err1 != nil {
return err1
}
return err
}
defer dir.Close()
dirs, err := dir.Readdir(-1)
err1 := walkFn(path, info, err)
// If err != nil, walk can't walk into this directory.
// err1 != nil means walkFn want walk to skip this directory or stop walking.
// Therefore, if one of err and err1 isn't nil, walk will return.
if err != nil || err1 != nil {
// The caller's behavior is controlled by the return value, which is decided
// by walkFn. walkFn may ignore err and return nil.
// If walkFn returns SkipDir, it will be handled by the caller.
// So walk should return whatever walkFn returns.
return err1
}
for _, fileInfo := range dirs {
filename := filepath.Join(path, fileInfo.Name())
if err = walk(fs, filename, fileInfo, walkFn); err != nil {
if !fileInfo.IsDir() || err != filepath.SkipDir {
return err
}
}
}
return nil
}