gin/fs.go

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// Copyright 2017 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package gin
import (
"net/http"
"os"
)
// OnlyFilesFS implements an http.FileSystem without `Readdir` functionality.
type OnlyFilesFS struct {
FileSystem http.FileSystem
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}
// Open passes `Open` to the upstream implementation without `Readdir` functionality.
func (o OnlyFilesFS) Open(name string) (http.File, error) {
f, err := o.FileSystem.Open(name)
if err != nil {
return nil, err
}
return neutralizedReaddirFile{f}, nil
}
// neutralizedReaddirFile wraps http.File with a specific implementation of `Readdir`.
type neutralizedReaddirFile struct {
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http.File
}
// Readdir overrides the http.File default implementation and always returns nil.
func (n neutralizedReaddirFile) Readdir(_ int) ([]os.FileInfo, error) {
// this disables directory listing
return nil, nil
}
// Dir returns an http.FileSystem that can be used by http.FileServer().
// It is used internally in router.Static().
// if listDirectory == true, then it works the same as http.Dir(),
// otherwise it returns a filesystem that prevents http.FileServer() to list the directory files.
func Dir(root string, listDirectory bool) http.FileSystem {
fs := http.Dir(root)
if listDirectory {
return fs
}
return &OnlyFilesFS{FileSystem: fs}
}