/
utils.go
240 lines (203 loc) · 5.36 KB
/
utils.go
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package oss
import (
"errors"
"fmt"
"strings"
"github.com/Xuanwo/storage/types/info"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
"github.com/Xuanwo/storage"
"github.com/Xuanwo/storage/pkg/credential"
"github.com/Xuanwo/storage/pkg/httpclient"
"github.com/Xuanwo/storage/services"
"github.com/Xuanwo/storage/types"
ps "github.com/Xuanwo/storage/types/pairs"
)
// Service is the aliyun oss *Service config.
type Service struct {
service *oss.Client
}
// String implements Servicer.String
func (s *Service) String() string {
if s.service == nil {
return fmt.Sprintf("Servicer oss")
}
return fmt.Sprintf("Servicer oss {AccessKey: %s}", s.service.Config.AccessKeyID)
}
// Storage is the aliyun object storage service.
type Storage struct {
bucket *oss.Bucket
name string
workDir string
}
// String implements Storager.String
func (s *Storage) String() string {
return fmt.Sprintf(
"Storager oss {Name: %s, WorkDir: %s}",
s.bucket.BucketName, s.workDir,
)
}
// New will create both Servicer and Storager.
func New(pairs ...*types.Pair) (storage.Servicer, storage.Storager, error) {
return newServicerAndStorager(pairs...)
}
// NewServicer will create Servicer only.
func NewServicer(pairs ...*types.Pair) (storage.Servicer, error) {
return newServicer(pairs...)
}
// NewStorager will create Storager only.
func NewStorager(pairs ...*types.Pair) (storage.Storager, error) {
_, store, err := newServicerAndStorager(pairs...)
return store, err
}
func newServicer(pairs ...*types.Pair) (srv *Service, err error) {
defer func() {
if err != nil {
err = &services.InitError{Op: services.OpNewServicer, Type: Type, Err: err, Pairs: pairs}
}
}()
srv = &Service{}
opt, err := parsePairServiceNew(pairs)
if err != nil {
return nil, err
}
credProtocol, cred := opt.Credential.Protocol(), opt.Credential.Value()
if credProtocol != credential.ProtocolHmac {
return nil, services.NewPairUnsupportedError(ps.WithCredential(opt.Credential))
}
ep := opt.Endpoint.Value()
srv.service, err = oss.New(ep.String(), cred[0], cred[1],
oss.HTTPClient(httpclient.New(opt.HTTPClientOptions)),
)
if err != nil {
return nil, err
}
return
}
func newServicerAndStorager(pairs ...*types.Pair) (srv *Service, store *Storage, err error) {
defer func() {
if err != nil {
err = &services.InitError{Op: services.OpNewStorager, Type: Type, Err: err, Pairs: pairs}
}
}()
srv, err = newServicer(pairs...)
if err != nil {
return
}
store, err = srv.newStorage(pairs...)
if err != nil {
if e := services.NewPairRequiredError(); errors.As(err, &e) {
return srv, nil, nil
}
return nil, nil, err
}
return srv, store, nil
}
// All available storage classes are listed here.
const (
// ref: https://www.alibabacloud.com/help/doc-detail/31984.htm
storageClassHeader = "x-oss-storage-class"
// ref: https://www.alibabacloud.com/help/doc-detail/51374.htm
StorageClassStandard = "STANDARD"
StorageClassIA = "IA"
StorageClassArchive = "Archive"
)
func formatError(err error) error {
switch e := err.(type) {
case oss.ServiceError:
switch e.Code {
case "":
switch e.StatusCode {
case 404:
return fmt.Errorf("%w: %v", services.ErrObjectNotExist, err)
default:
return err
}
case "NoSuchKey":
return fmt.Errorf("%w: %v", services.ErrObjectNotExist, err)
case "AccessDenied":
return fmt.Errorf("%w: %v", services.ErrPermissionDenied, err)
}
case oss.UnexpectedStatusCodeError:
switch e.Got() {
case 404:
return fmt.Errorf("%w: %v", services.ErrObjectNotExist, err)
case 403:
return fmt.Errorf("%w: %v", services.ErrPermissionDenied, err)
}
}
return err
}
// newStorage will create a new client.
func (s *Service) newStorage(pairs ...*types.Pair) (st *Storage, err error) {
opt, err := parsePairStorageNew(pairs)
if err != nil {
return nil, err
}
bucket, err := s.service.Bucket(opt.Name)
if err != nil {
return nil, err
}
store := &Storage{
bucket: bucket,
workDir: "/",
}
if opt.HasWorkDir {
store.workDir = opt.WorkDir
}
return store, nil
}
func (s *Service) formatError(op string, err error, name string) error {
if err == nil {
return nil
}
return &services.ServiceError{
Op: op,
Err: formatError(err),
Servicer: s,
Name: name,
}
}
// getAbsPath will calculate object storage's abs path
func (s *Storage) getAbsPath(path string) string {
prefix := strings.TrimPrefix(s.workDir, "/")
return prefix + path
}
// getRelPath will get object storage's rel path.
func (s *Storage) getRelPath(path string) string {
prefix := strings.TrimPrefix(s.workDir, "/")
return strings.TrimPrefix(path, prefix)
}
func (s *Storage) formatError(op string, err error, path ...string) error {
if err == nil {
return nil
}
return &services.StorageError{
Op: op,
Err: formatError(err),
Storager: s,
Path: path,
}
}
func (s *Storage) formatFileObject(v oss.ObjectProperties) (o *types.Object, err error) {
o = &types.Object{
ID: v.Key,
Name: s.getRelPath(v.Key),
Type: types.ObjectTypeFile,
Size: v.Size,
UpdatedAt: v.LastModified,
ObjectMeta: info.NewObjectMeta(),
}
if v.Type != "" {
o.SetContentType(v.Type)
}
// OSS advise us don't use Etag as Content-MD5.
//
// ref: https://help.aliyun.com/document_detail/31965.html
if v.ETag != "" {
o.SetETag(v.ETag)
}
if value := v.Type; value != "" {
setStorageClass(o.ObjectMeta, value)
}
return
}