mirror of
https://github.com/minio/minio.git
synced 2024-12-26 07:05:55 -05:00
137 lines
4.0 KiB
Go
137 lines
4.0 KiB
Go
// 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 replication
|
|
|
|
import (
|
|
"encoding/xml"
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/minio/pkg/wildcard"
|
|
)
|
|
|
|
// DestinationARNPrefix - destination ARN prefix as per AWS S3 specification.
|
|
const DestinationARNPrefix = "arn:aws:s3:::"
|
|
|
|
// DestinationARNMinIOPrefix - destination ARN prefix for MinIO.
|
|
const DestinationARNMinIOPrefix = "arn:minio:replication:"
|
|
|
|
// Destination - destination in ReplicationConfiguration.
|
|
type Destination struct {
|
|
XMLName xml.Name `xml:"Destination" json:"Destination"`
|
|
Bucket string `xml:"Bucket" json:"Bucket"`
|
|
StorageClass string `xml:"StorageClass" json:"StorageClass"`
|
|
ARN string
|
|
// EncryptionConfiguration TODO: not needed for MinIO
|
|
}
|
|
|
|
func (d Destination) isValidStorageClass() bool {
|
|
if d.StorageClass == "" {
|
|
return true
|
|
}
|
|
return d.StorageClass == "STANDARD" || d.StorageClass == "REDUCED_REDUNDANCY"
|
|
}
|
|
|
|
// IsValid - checks whether Destination is valid or not.
|
|
func (d Destination) IsValid() bool {
|
|
return d.Bucket != "" || !d.isValidStorageClass()
|
|
}
|
|
|
|
func (d Destination) String() string {
|
|
return d.ARN
|
|
}
|
|
|
|
// LegacyArn returns true if arn format has prefix "arn:aws:s3:::" which was
|
|
// used prior to multi-destination
|
|
func (d Destination) LegacyArn() bool {
|
|
return strings.HasPrefix(d.ARN, DestinationARNPrefix)
|
|
}
|
|
|
|
// TargetArn returns true if arn format has prefix "arn:minio:replication:::"
|
|
// used for multi-destination targets
|
|
func (d Destination) TargetArn() bool {
|
|
return strings.HasPrefix(d.ARN, DestinationARNMinIOPrefix)
|
|
}
|
|
|
|
// MarshalXML - encodes to XML data.
|
|
func (d Destination) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
|
|
if err := e.EncodeToken(start); err != nil {
|
|
return err
|
|
}
|
|
if err := e.EncodeElement(d.String(), xml.StartElement{Name: xml.Name{Local: "Bucket"}}); err != nil {
|
|
return err
|
|
}
|
|
if d.StorageClass != "" {
|
|
if err := e.EncodeElement(d.StorageClass, xml.StartElement{Name: xml.Name{Local: "StorageClass"}}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return e.EncodeToken(xml.EndElement{Name: start.Name})
|
|
}
|
|
|
|
// UnmarshalXML - decodes XML data.
|
|
func (d *Destination) UnmarshalXML(dec *xml.Decoder, start xml.StartElement) (err error) {
|
|
// Make subtype to avoid recursive UnmarshalXML().
|
|
type destination Destination
|
|
dest := destination{}
|
|
|
|
if err := dec.DecodeElement(&dest, &start); err != nil {
|
|
return err
|
|
}
|
|
parsedDest, err := parseDestination(dest.Bucket)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if dest.StorageClass != "" {
|
|
switch dest.StorageClass {
|
|
case "STANDARD", "REDUCED_REDUNDANCY":
|
|
default:
|
|
return fmt.Errorf("unknown storage class %s", dest.StorageClass)
|
|
}
|
|
}
|
|
parsedDest.StorageClass = dest.StorageClass
|
|
*d = parsedDest
|
|
return nil
|
|
}
|
|
|
|
// Validate - validates Resource is for given bucket or not.
|
|
func (d Destination) Validate(bucketName string) error {
|
|
if !d.IsValid() {
|
|
return Errorf("invalid destination")
|
|
}
|
|
|
|
if !wildcard.Match(d.Bucket, bucketName) {
|
|
return Errorf("bucket name does not match")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// parseDestination - parses string to Destination.
|
|
func parseDestination(s string) (Destination, error) {
|
|
if !strings.HasPrefix(s, DestinationARNPrefix) && !strings.HasPrefix(s, DestinationARNMinIOPrefix) {
|
|
return Destination{}, Errorf("invalid destination '%s'", s)
|
|
}
|
|
|
|
bucketName := strings.TrimPrefix(s, DestinationARNPrefix)
|
|
|
|
return Destination{
|
|
Bucket: bucketName,
|
|
ARN: s,
|
|
}, nil
|
|
}
|