minio/cmd/object-api-interface.go

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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 (
"context"
"io"
"net/http"
"time"
"github.com/minio/madmin-go"
"github.com/minio/minio-go/v7/pkg/encrypt"
"github.com/minio/minio-go/v7/pkg/tags"
"github.com/minio/minio/pkg/bucket/policy"
)
// CheckPreconditionFn returns true if precondition check failed.
type CheckPreconditionFn func(o ObjectInfo) bool
// GetObjectInfoFn is the signature of GetObjectInfo function.
type GetObjectInfoFn func(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)
// ObjectOptions represents object options for ObjectLayer object operations
type ObjectOptions struct {
ServerSideEncryption encrypt.ServerSide
VersionSuspended bool // indicates if the bucket was previously versioned but is currently suspended.
Versioned bool // indicates if the bucket is versioned
WalkVersions bool // indicates if the we are interested in walking versions
VersionID string // Specifies the versionID which needs to be overwritten or read
MTime time.Time // Is only set in POST/PUT operations
Expires time.Time // Is only used in POST/PUT operations
DeleteMarker bool // Is only set in DELETE operations for delete marker replication
UserDefined map[string]string // only set in case of POST/PUT operations
PartNumber int // only useful in case of GetObject/HeadObject
CheckPrecondFn CheckPreconditionFn // only set during GetObject/HeadObject/CopyObjectPart preconditional valuation
DeleteMarkerReplicationStatus string // Is only set in DELETE operations
VersionPurgeStatus VersionPurgeStatusType // Is only set in DELETE operations for delete marker version to be permanently deleted.
Transition TransitionOptions
NoLock bool // indicates to lower layers if the caller is expecting to hold locks.
ProxyRequest bool // only set for GET/HEAD in active-active replication scenario
ProxyHeaderSet bool // only set for GET/HEAD in active-active replication scenario
ParentIsObject func(ctx context.Context, bucket, parent string) bool // Used to verify if parent is an object.
// Use the maximum parity (N/2), used when saving server configuration files
MaxParity bool
}
// TransitionOptions represents object options for transition ObjectLayer operation
type TransitionOptions struct {
Status string
Tier string
ETag string
RestoreRequest *RestoreObjectRequest
RestoreExpiry time.Time
ExpireRestored bool
}
// BucketOptions represents bucket options for ObjectLayer bucket operations
type BucketOptions struct {
Location string
LockEnabled bool
VersioningEnabled bool
}
// LockType represents required locking for ObjectLayer operations
type LockType int
const (
noLock LockType = iota
readLock
writeLock
)
// BackendMetrics - represents bytes served from backend
type BackendMetrics struct {
bytesReceived uint64
bytesSent uint64
requestStats RequestStats
}
// ObjectLayer implements primitives for object API layer.
type ObjectLayer interface {
// Locking operations on object.
NewNSLock(bucket string, objects ...string) RWLocker
// Storage operations.
Shutdown(context.Context) error
NSScanner(ctx context.Context, bf *bloomFilter, updates chan<- madmin.DataUsageInfo) error
BackendInfo() madmin.BackendInfo
StorageInfo(ctx context.Context) (StorageInfo, []error)
LocalStorageInfo(ctx context.Context) (StorageInfo, []error)
// Bucket operations.
MakeBucketWithLocation(ctx context.Context, bucket string, opts BucketOptions) error
GetBucketInfo(ctx context.Context, bucket string) (bucketInfo BucketInfo, err error)
ListBuckets(ctx context.Context) (buckets []BucketInfo, err error)
DeleteBucket(ctx context.Context, bucket string, forceDelete bool) error
ListObjects(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error)
ListObjectsV2(ctx context.Context, bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (result ListObjectsV2Info, err error)
ListObjectVersions(ctx context.Context, bucket, prefix, marker, versionMarker, delimiter string, maxKeys int) (result ListObjectVersionsInfo, err error)
// Walk lists all objects including versions, delete markers.
Walk(ctx context.Context, bucket, prefix string, results chan<- ObjectInfo, opts ObjectOptions) error
// Object operations.
// GetObjectNInfo returns a GetObjectReader that satisfies the
// ReadCloser interface. The Close method unlocks the object
// after reading, so it must always be called after usage.
//
// IMPORTANTLY, when implementations return err != nil, this
// function MUST NOT return a non-nil ReadCloser.
GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (reader *GetObjectReader, err error)
GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error)
PutObject(ctx context.Context, bucket, object string, data *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, err error)
CopyObject(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (objInfo ObjectInfo, err error)
DeleteObject(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)
DeleteObjects(ctx context.Context, bucket string, objects []ObjectToDelete, opts ObjectOptions) ([]DeletedObject, []error)
TransitionObject(ctx context.Context, bucket, object string, opts ObjectOptions) error
RestoreTransitionedObject(ctx context.Context, bucket, object string, opts ObjectOptions) error
// Multipart operations.
ListMultipartUploads(ctx context.Context, bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error)
NewMultipartUpload(ctx context.Context, bucket, object string, opts ObjectOptions) (uploadID string, err error)
CopyObjectPart(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int,
startOffset int64, length int64, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (info PartInfo, err error)
PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error)
GetMultipartInfo(ctx context.Context, bucket, object, uploadID string, opts ObjectOptions) (info MultipartInfo, err error)
ListObjectParts(ctx context.Context, bucket, object, uploadID string, partNumberMarker int, maxParts int, opts ObjectOptions) (result ListPartsInfo, err error)
AbortMultipartUpload(ctx context.Context, bucket, object, uploadID string, opts ObjectOptions) error
CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)
// Policy operations
SetBucketPolicy(context.Context, string, *policy.Policy) error
GetBucketPolicy(context.Context, string) (*policy.Policy, error)
DeleteBucketPolicy(context.Context, string) error
// Supported operations check
IsNotificationSupported() bool
IsListenSupported() bool
IsEncryptionSupported() bool
IsTaggingSupported() bool
IsCompressionSupported() bool
SetDriveCounts() []int // list of erasure stripe size for each pool in order.
// Healing operations.
HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error)
HealBucket(ctx context.Context, bucket string, opts madmin.HealOpts) (madmin.HealResultItem, error)
HealObject(ctx context.Context, bucket, object, versionID string, opts madmin.HealOpts) (madmin.HealResultItem, error)
HealObjects(ctx context.Context, bucket, prefix string, opts madmin.HealOpts, fn HealObjectFn) error
// Backend related metrics
GetMetrics(ctx context.Context) (*BackendMetrics, error)
// Returns health of the backend
Health(ctx context.Context, opts HealthOptions) HealthResult
ReadHealth(ctx context.Context) bool
// Metadata operations
PutObjectMetadata(context.Context, string, string, ObjectOptions) (ObjectInfo, error)
// ObjectTagging operations
PutObjectTags(context.Context, string, string, string, ObjectOptions) (ObjectInfo, error)
GetObjectTags(context.Context, string, string, ObjectOptions) (*tags.Tags, error)
DeleteObjectTags(context.Context, string, string, ObjectOptions) (ObjectInfo, error)
}
// GetObject - TODO(aead): This function just acts as an adapter for GetObject tests and benchmarks
// since the GetObject method of the ObjectLayer interface has been removed. Once, the
// tests are adjusted to use GetObjectNInfo this function can be removed.
func GetObject(ctx context.Context, api ObjectLayer, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
var header http.Header
if etag != "" {
header.Set("ETag", etag)
}
Range := &HTTPRangeSpec{Start: startOffset, End: startOffset + length}
reader, err := api.GetObjectNInfo(ctx, bucket, object, Range, header, readLock, opts)
if err != nil {
return err
}
defer reader.Close()
_, err = io.Copy(writer, reader)
return err
}