mirror of
https://github.com/caddyserver/caddy.git
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126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
// Copyright 2015 Matthew Holt
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package certmagic
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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)
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// FileStorage facilitates forming file paths derived from a root
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// directory. It is used to get file paths in a consistent,
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// cross-platform way or persisting ACME assets on the file system.
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type FileStorage struct {
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Path string
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}
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// Exists returns true if key exists in fs.
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func (fs FileStorage) Exists(key string) bool {
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_, err := os.Stat(fs.filename(key))
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return !os.IsNotExist(err)
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}
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// Store saves value at key.
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func (fs FileStorage) Store(key string, value []byte) error {
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filename := fs.filename(key)
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err := os.MkdirAll(filepath.Dir(filename), 0700)
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if err != nil {
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return err
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}
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return ioutil.WriteFile(filename, value, 0600)
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}
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// Load retrieves the value at key.
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func (fs FileStorage) Load(key string) ([]byte, error) {
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contents, err := ioutil.ReadFile(fs.filename(key))
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if os.IsNotExist(err) {
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return nil, ErrNotExist(err)
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}
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return contents, nil
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}
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// Delete deletes the value at key.
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// TODO: Delete any empty folders caused by this operation
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func (fs FileStorage) Delete(key string) error {
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err := os.Remove(fs.filename(key))
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if os.IsNotExist(err) {
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return ErrNotExist(err)
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}
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return err
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}
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// List returns all keys that match prefix.
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func (fs FileStorage) List(prefix string) ([]string, error) {
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d, err := os.Open(fs.filename(prefix))
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if os.IsNotExist(err) {
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return nil, ErrNotExist(err)
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}
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if err != nil {
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return nil, err
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}
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defer d.Close()
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return d.Readdirnames(-1)
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}
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// Stat returns information about key.
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func (fs FileStorage) Stat(key string) (KeyInfo, error) {
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fi, err := os.Stat(fs.filename(key))
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if os.IsNotExist(err) {
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return KeyInfo{}, ErrNotExist(err)
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}
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if err != nil {
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return KeyInfo{}, err
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}
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return KeyInfo{
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Key: key,
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Modified: fi.ModTime(),
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Size: fi.Size(),
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}, nil
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}
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func (fs FileStorage) filename(key string) string {
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return filepath.Join(fs.Path, filepath.FromSlash(key))
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}
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// homeDir returns the best guess of the current user's home
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// directory from environment variables. If unknown, "." (the
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// current directory) is returned instead.
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func homeDir() string {
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home := os.Getenv("HOME")
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if home == "" && runtime.GOOS == "windows" {
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drive := os.Getenv("HOMEDRIVE")
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path := os.Getenv("HOMEPATH")
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home = drive + path
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if drive == "" || path == "" {
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home = os.Getenv("USERPROFILE")
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}
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}
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if home == "" {
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home = "."
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}
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return home
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}
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func dataDir() string {
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baseDir := filepath.Join(homeDir(), ".local", "share")
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if xdgData := os.Getenv("XDG_DATA_HOME"); xdgData != "" {
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baseDir = xdgData
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}
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return filepath.Join(baseDir, "certmagic")
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}
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var _ Storage = FileStorage{}
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