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Copy pathconfig-common.go
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93 lines (79 loc) · 2.79 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"context"
"errors"
"io/ioutil"
"net/http"
"github.com/minio/minio/internal/hash"
)
var errConfigNotFound = errors.New("config file not found")
func readConfigWithMetadata(ctx context.Context, store objectIO, configFile string) ([]byte, ObjectInfo, error) {
r, err := store.GetObjectNInfo(ctx, minioMetaBucket, configFile, nil, http.Header{}, readLock, ObjectOptions{})
if err != nil {
// Treat object not found as config not found.
if isErrObjectNotFound(err) {
return nil, ObjectInfo{}, errConfigNotFound
}
return nil, ObjectInfo{}, err
}
defer r.Close()
buf, err := ioutil.ReadAll(r)
if err != nil {
return nil, ObjectInfo{}, err
}
if len(buf) == 0 {
return nil, ObjectInfo{}, errConfigNotFound
}
return buf, r.ObjInfo, nil
}
func readConfig(ctx context.Context, store objectIO, configFile string) ([]byte, error) {
buf, _, err := readConfigWithMetadata(ctx, store, configFile)
return buf, err
}
type objectDeleter interface {
DeleteObject(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)
}
func deleteConfig(ctx context.Context, objAPI objectDeleter, configFile string) error {
_, err := objAPI.DeleteObject(ctx, minioMetaBucket, configFile, ObjectOptions{
DeletePrefix: true,
})
if err != nil && isErrObjectNotFound(err) {
return errConfigNotFound
}
return err
}
func saveConfig(ctx context.Context, store objectIO, configFile string, data []byte) error {
hashReader, err := hash.NewReader(bytes.NewReader(data), int64(len(data)), "", getSHA256Hash(data), int64(len(data)))
if err != nil {
return err
}
_, err = store.PutObject(ctx, minioMetaBucket, configFile, NewPutObjReader(hashReader), ObjectOptions{MaxParity: true})
return err
}
func checkConfig(ctx context.Context, objAPI ObjectLayer, configFile string) error {
if _, err := objAPI.GetObjectInfo(ctx, minioMetaBucket, configFile, ObjectOptions{}); err != nil {
// Treat object not found as config not found.
if isErrObjectNotFound(err) {
return errConfigNotFound
}
return err
}
return nil
}