go/src/net/http/example_filesystem_test.go

// containsDotFile reports whether name contains a path element starting with a period.
// The name is assumed to be a delimited by forward slashes, as guaranteed
// by the http.FileSystem interface.
func containsDotFile(name string) bool { … }

type dotFileHidingFile …

// Readdir is a wrapper around the Readdir method of the embedded File
// that filters out all files that start with a period in their name.
func (f dotFileHidingFile) Readdir(n int) (fis []fs.FileInfo, err error) { … }

type dotFileHidingFileSystem …

// Open is a wrapper around the Open method of the embedded FileSystem
// that serves a 403 permission error when name has a file or directory
// with whose name starts with a period in its path.
func (fsys dotFileHidingFileSystem) Open(name string) (http.File, error) { … }

func ExampleFileServer_dotFileHiding() { … }