/
token_storage.go
172 lines (146 loc) · 4.05 KB
/
token_storage.go
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// Code generated by ./jsonstorage.sh TokenStorage Token Value token_storage.go DO NOT EDIT.
package guard
import (
"context"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"sync"
)
type TokenStorage interface {
// Get Token by value. Must return ErrTokenNotFound if entity not found.
Get(ctx context.Context, value string) (*Token, error)
// Set Token indexed by value.
Set(ctx context.Context, value *Token) error
// List Token.
List(ctx context.Context) ([]Token, error)
// Delete Token by value.
Delete(ctx context.Context, value string) error
}
var ErrTokenNotFound = errors.New("not found")
type MemoryTokenStorage struct {
storage sync.Map
}
func (mts *MemoryTokenStorage) Get(_ context.Context, value string) (*Token, error) {
v, ok := mts.storage.Load(value)
if !ok {
return nil, ErrTokenNotFound
}
return v.(*Token), nil
}
func (mts *MemoryTokenStorage) Set(_ context.Context, value *Token) error {
mts.storage.Store(value.Value, value)
return nil
}
func (mts *MemoryTokenStorage) List(_ context.Context) ([]Token, error) {
var list []Token
mts.storage.Range(func(key, value interface{}) bool {
t := value.(*Token)
list = append(list, *t)
return true
})
return list, nil
}
func (mts *MemoryTokenStorage) Delete(_ context.Context, value string) error {
mts.storage.Delete(value)
return nil
}
var ErrTokenInvalid = errors.New("value malformed")
const TokenStorageFileSuffix = ".json"
type FileTokenStorage struct {
Directory string
pattern *regexp.Regexp
init sync.Once
}
func (fts *FileTokenStorage) Get(_ context.Context, value string) (*Token, error) {
fts.doInit()
if !fts.pattern.MatchString(value) {
return nil, ErrTokenInvalid
}
u, err := fts.readToken(value)
if errors.Is(err, os.ErrNotExist) {
return nil, ErrTokenNotFound
}
return u, err
}
func (fts *FileTokenStorage) Set(_ context.Context, value *Token) error {
fts.doInit()
if !fts.pattern.MatchString(value.Value) {
return ErrTokenInvalid
}
if err := os.MkdirAll(fts.Directory, 0700); err != nil {
return fmt.Errorf("create dir: %w", err)
}
tmpFile, err := os.CreateTemp(fts.Directory, value.Value+"-*.tmp")
if err != nil {
return fmt.Errorf("create temp file: %w", err)
}
defer tmpFile.Close()
enc := json.NewEncoder(tmpFile)
enc.SetIndent("", " ")
if err := enc.Encode(value); err != nil {
_ = tmpFile.Close()
_ = os.Remove(tmpFile.Name())
return fmt.Errorf("encode value: %w", err)
}
if err := tmpFile.Close(); err != nil {
_ = os.Remove(tmpFile.Name())
return fmt.Errorf("close temp file: %w", err)
}
if err := os.Rename(tmpFile.Name(), filepath.Join(fts.Directory, value.Value)+TokenStorageFileSuffix); err != nil {
return fmt.Errorf("rename temp file: %w", err)
}
return nil
}
func (fts *FileTokenStorage) List(_ context.Context) ([]Token, error) {
fts.doInit()
list, err := ioutil.ReadDir(fts.Directory)
if err != nil {
return nil, fmt.Errorf("read dir: %w", err)
}
var values []Token
for _, item := range list {
if item.IsDir() {
continue
}
name := item.Name()
if !strings.HasSuffix(name, TokenStorageFileSuffix) {
continue
}
v, err := fts.readToken(name[:len(name)-len(TokenStorageFileSuffix)])
if err != nil {
return nil, fmt.Errorf("read value %s: %w", name, err)
}
values = append(values, *v)
}
return values, nil
}
func (fts *FileTokenStorage) Delete(_ context.Context, value string) error {
fts.doInit()
if !fts.pattern.MatchString(value) {
return ErrTokenInvalid
}
return os.Remove(filepath.Join(fts.Directory, value+TokenStorageFileSuffix))
}
func (fts *FileTokenStorage) doInit() {
fts.init.Do(func() {
fts.pattern = regexp.MustCompile(`^[a-zA-Z0-9-_.]+$`)
})
}
func (fts *FileTokenStorage) readToken(value string) (*Token, error) {
f, err := os.Open(filepath.Join(fts.Directory, value) + TokenStorageFileSuffix)
if err != nil {
return nil, fmt.Errorf("open value file: %w", err)
}
defer f.Close()
var out Token
if err := json.NewDecoder(f).Decode(&out); err != nil {
return nil, fmt.Errorf("decode value: %w", err)
}
return &out, nil
}