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207 lines
10 KiB
Go
207 lines
10 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"io"
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"net/http"
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"time"
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"github.com/minio/madmin-go"
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"github.com/minio/minio-go/v7/pkg/encrypt"
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"github.com/minio/minio-go/v7/pkg/tags"
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"github.com/minio/pkg/bucket/policy"
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)
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// CheckPreconditionFn returns true if precondition check failed.
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type CheckPreconditionFn func(o ObjectInfo) bool
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// GetObjectInfoFn is the signature of GetObjectInfo function.
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type GetObjectInfoFn func(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)
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// ObjectOptions represents object options for ObjectLayer object operations
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type ObjectOptions struct {
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ServerSideEncryption encrypt.ServerSide
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VersionSuspended bool // indicates if the bucket was previously versioned but is currently suspended.
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Versioned bool // indicates if the bucket is versioned
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WalkVersions bool // indicates if the we are interested in walking versions
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VersionID string // Specifies the versionID which needs to be overwritten or read
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MTime time.Time // Is only set in POST/PUT operations
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Expires time.Time // Is only used in POST/PUT operations
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DeleteMarker bool // Is only set in DELETE operations for delete marker replication
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UserDefined map[string]string // only set in case of POST/PUT operations
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PartNumber int // only useful in case of GetObject/HeadObject
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CheckPrecondFn CheckPreconditionFn // only set during GetObject/HeadObject/CopyObjectPart preconditional valuation
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DeleteMarkerReplicationStatus string // Is only set in DELETE operations
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VersionPurgeStatus VersionPurgeStatusType // Is only set in DELETE operations for delete marker version to be permanently deleted.
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Transition TransitionOptions
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NoLock bool // indicates to lower layers if the caller is expecting to hold locks.
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ProxyRequest bool // only set for GET/HEAD in active-active replication scenario
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ProxyHeaderSet bool // only set for GET/HEAD in active-active replication scenario
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ParentIsObject func(ctx context.Context, bucket, parent string) bool // Used to verify if parent is an object.
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DeletePrefix bool // set true to enforce a prefix deletion, only application for DeleteObject API,
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// Use the maximum parity (N/2), used when saving server configuration files
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MaxParity bool
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}
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// TransitionOptions represents object options for transition ObjectLayer operation
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type TransitionOptions struct {
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Status string
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Tier string
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ETag string
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RestoreRequest *RestoreObjectRequest
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RestoreExpiry time.Time
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ExpireRestored bool
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}
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// BucketOptions represents bucket options for ObjectLayer bucket operations
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type BucketOptions struct {
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Location string
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LockEnabled bool
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VersioningEnabled bool
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}
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// LockType represents required locking for ObjectLayer operations
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type LockType int
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const (
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noLock LockType = iota
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readLock
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writeLock
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)
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// BackendMetrics - represents bytes served from backend
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type BackendMetrics struct {
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bytesReceived uint64
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bytesSent uint64
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requestStats RequestStats
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}
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// ObjectLayer implements primitives for object API layer.
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type ObjectLayer interface {
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// Locking operations on object.
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NewNSLock(bucket string, objects ...string) RWLocker
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// Storage operations.
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Shutdown(context.Context) error
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NSScanner(ctx context.Context, bf *bloomFilter, updates chan<- madmin.DataUsageInfo) error
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BackendInfo() madmin.BackendInfo
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StorageInfo(ctx context.Context) (StorageInfo, []error)
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LocalStorageInfo(ctx context.Context) (StorageInfo, []error)
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// Bucket operations.
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MakeBucketWithLocation(ctx context.Context, bucket string, opts BucketOptions) error
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GetBucketInfo(ctx context.Context, bucket string) (bucketInfo BucketInfo, err error)
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ListBuckets(ctx context.Context) (buckets []BucketInfo, err error)
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DeleteBucket(ctx context.Context, bucket string, forceDelete bool) error
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ListObjects(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error)
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ListObjectsV2(ctx context.Context, bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (result ListObjectsV2Info, err error)
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ListObjectVersions(ctx context.Context, bucket, prefix, marker, versionMarker, delimiter string, maxKeys int) (result ListObjectVersionsInfo, err error)
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// Walk lists all objects including versions, delete markers.
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Walk(ctx context.Context, bucket, prefix string, results chan<- ObjectInfo, opts ObjectOptions) error
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// Object operations.
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// GetObjectNInfo returns a GetObjectReader that satisfies the
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// ReadCloser interface. The Close method unlocks the object
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// after reading, so it must always be called after usage.
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//
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// IMPORTANTLY, when implementations return err != nil, this
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// function MUST NOT return a non-nil ReadCloser.
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GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (reader *GetObjectReader, err error)
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GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error)
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PutObject(ctx context.Context, bucket, object string, data *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, err error)
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CopyObject(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (objInfo ObjectInfo, err error)
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DeleteObject(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error)
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DeleteObjects(ctx context.Context, bucket string, objects []ObjectToDelete, opts ObjectOptions) ([]DeletedObject, []error)
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TransitionObject(ctx context.Context, bucket, object string, opts ObjectOptions) error
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RestoreTransitionedObject(ctx context.Context, bucket, object string, opts ObjectOptions) error
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// Multipart operations.
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ListMultipartUploads(ctx context.Context, bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error)
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NewMultipartUpload(ctx context.Context, bucket, object string, opts ObjectOptions) (uploadID string, err error)
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CopyObjectPart(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int,
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startOffset int64, length int64, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (info PartInfo, err error)
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PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error)
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GetMultipartInfo(ctx context.Context, bucket, object, uploadID string, opts ObjectOptions) (info MultipartInfo, err error)
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ListObjectParts(ctx context.Context, bucket, object, uploadID string, partNumberMarker int, maxParts int, opts ObjectOptions) (result ListPartsInfo, err error)
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AbortMultipartUpload(ctx context.Context, bucket, object, uploadID string, opts ObjectOptions) error
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CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)
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// Policy operations
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SetBucketPolicy(context.Context, string, *policy.Policy) error
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GetBucketPolicy(context.Context, string) (*policy.Policy, error)
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DeleteBucketPolicy(context.Context, string) error
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// Supported operations check
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IsNotificationSupported() bool
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IsListenSupported() bool
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IsEncryptionSupported() bool
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IsTaggingSupported() bool
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IsCompressionSupported() bool
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SetDriveCounts() []int // list of erasure stripe size for each pool in order.
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// Healing operations.
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HealFormat(ctx context.Context, dryRun bool) (madmin.HealResultItem, error)
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HealBucket(ctx context.Context, bucket string, opts madmin.HealOpts) (madmin.HealResultItem, error)
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HealObject(ctx context.Context, bucket, object, versionID string, opts madmin.HealOpts) (madmin.HealResultItem, error)
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HealObjects(ctx context.Context, bucket, prefix string, opts madmin.HealOpts, fn HealObjectFn) error
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// Backend related metrics
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GetMetrics(ctx context.Context) (*BackendMetrics, error)
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// Returns health of the backend
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Health(ctx context.Context, opts HealthOptions) HealthResult
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ReadHealth(ctx context.Context) bool
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// Metadata operations
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PutObjectMetadata(context.Context, string, string, ObjectOptions) (ObjectInfo, error)
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// ObjectTagging operations
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PutObjectTags(context.Context, string, string, string, ObjectOptions) (ObjectInfo, error)
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GetObjectTags(context.Context, string, string, ObjectOptions) (*tags.Tags, error)
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DeleteObjectTags(context.Context, string, string, ObjectOptions) (ObjectInfo, error)
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}
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// GetObject - TODO(aead): This function just acts as an adapter for GetObject tests and benchmarks
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// since the GetObject method of the ObjectLayer interface has been removed. Once, the
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// tests are adjusted to use GetObjectNInfo this function can be removed.
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func GetObject(ctx context.Context, api ObjectLayer, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
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var header http.Header
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if etag != "" {
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header.Set("ETag", etag)
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}
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Range := &HTTPRangeSpec{Start: startOffset, End: startOffset + length}
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reader, err := api.GetObjectNInfo(ctx, bucket, object, Range, header, readLock, opts)
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if err != nil {
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return err
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}
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defer reader.Close()
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_, err = io.Copy(writer, reader)
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return err
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}
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