148 lines
3.2 KiB
Go
148 lines
3.2 KiB
Go
package certmagic
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import (
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"bytes"
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"encoding/gob"
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"errors"
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"fmt"
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"path"
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"strings"
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"time"
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"github.com/mholt/certmagic"
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"github.com/micro/go-micro/store"
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"github.com/micro/go-micro/sync/lock"
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)
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// File represents a "File" that will be stored in store.Store - the contents and last modified time
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type File struct {
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// last modified time
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LastModified time.Time
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// Contents
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Contents []byte
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}
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// storage is an implementation of certmagic.Storage using micro's sync.Map and store.Store interfaces.
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// As certmagic storage expects a filesystem (with stat() abilities) we have to implement
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// the bare minimum of metadata.
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type storage struct {
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lock lock.Lock
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store store.Store
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}
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func (s *storage) Lock(key string) error {
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return s.lock.Acquire(key, lock.TTL(10*time.Minute))
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}
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func (s *storage) Unlock(key string) error {
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return s.lock.Release(key)
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}
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func (s *storage) Store(key string, value []byte) error {
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f := File{
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LastModified: time.Now(),
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Contents: value,
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}
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buf := &bytes.Buffer{}
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e := gob.NewEncoder(buf)
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if err := e.Encode(f); err != nil {
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return err
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}
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r := &store.Record{
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Key: key,
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Value: buf.Bytes(),
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}
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return s.store.Write(r)
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}
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func (s *storage) Load(key string) ([]byte, error) {
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if !s.Exists(key) {
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return nil, certmagic.ErrNotExist(errors.New(key + " doesn't exist"))
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}
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records, err := s.store.Read(key)
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if err != nil {
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return nil, err
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}
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if len(records) != 1 {
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return nil, fmt.Errorf("ACME Storage: multiple records matched key %s", key)
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}
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b := bytes.NewBuffer(records[0].Value)
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d := gob.NewDecoder(b)
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var f File
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err = d.Decode(&f)
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if err != nil {
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return nil, err
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}
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return f.Contents, nil
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}
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func (s *storage) Delete(key string) error {
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return s.store.Delete(key)
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}
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func (s *storage) Exists(key string) bool {
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if _, err := s.store.Read(key); err != nil {
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return false
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}
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return true
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}
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func (s *storage) List(prefix string, recursive bool) ([]string, error) {
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records, err := s.store.List()
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if err != nil {
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return nil, err
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}
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//nolint:prealloc
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var results []string
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for _, r := range records {
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if strings.HasPrefix(r.Key, prefix) {
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results = append(results, r.Key)
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}
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}
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if recursive {
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return results, nil
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}
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keysMap := make(map[string]bool)
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for _, key := range results {
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dir := strings.Split(strings.TrimPrefix(key, prefix+"/"), "/")
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keysMap[dir[0]] = true
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}
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results = make([]string, 0)
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for k := range keysMap {
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results = append(results, path.Join(prefix, k))
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}
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return results, nil
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}
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func (s *storage) Stat(key string) (certmagic.KeyInfo, error) {
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records, err := s.store.Read(key)
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if err != nil {
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return certmagic.KeyInfo{}, err
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}
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if len(records) != 1 {
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return certmagic.KeyInfo{}, fmt.Errorf("ACME Storage: multiple records matched key %s", key)
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}
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b := bytes.NewBuffer(records[0].Value)
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d := gob.NewDecoder(b)
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var f File
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err = d.Decode(&f)
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if err != nil {
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return certmagic.KeyInfo{}, err
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}
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return certmagic.KeyInfo{
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Key: key,
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Modified: f.LastModified,
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Size: int64(len(f.Contents)),
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IsTerminal: false,
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}, nil
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}
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// NewStorage returns a certmagic.Storage backed by a go-micro/lock and go-micro/store
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func NewStorage(lock lock.Lock, store store.Store) certmagic.Storage {
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return &storage{
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lock: lock,
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store: store,
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}
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}
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