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745 lines
23 KiB
745 lines
23 KiB
/*
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* Minio Cloud Storage, (C) 2017 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package b2
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import (
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"context"
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"crypto/sha1"
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"fmt"
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"hash"
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"io"
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"io/ioutil"
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"strings"
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"sync"
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"time"
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b2 "github.com/minio/blazer/base"
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"github.com/minio/cli"
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"github.com/minio/minio-go/pkg/policy"
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"github.com/minio/minio/pkg/auth"
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"github.com/minio/minio/pkg/errors"
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h2 "github.com/minio/minio/pkg/hash"
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minio "github.com/minio/minio/cmd"
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)
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// Supported bucket types by B2 backend.
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const (
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bucketTypePrivate = "allPrivate"
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bucketTypeReadOnly = "allPublic"
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b2Backend = "b2"
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)
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func init() {
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const b2GatewayTemplate = `NAME:
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{{.HelpName}} - {{.Usage}}
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USAGE:
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{{.HelpName}} {{if .VisibleFlags}}[FLAGS]{{end}}
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{{if .VisibleFlags}}
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FLAGS:
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{{range .VisibleFlags}}{{.}}
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{{end}}{{end}}
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ENVIRONMENT VARIABLES:
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ACCESS:
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MINIO_ACCESS_KEY: B2 account id.
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MINIO_SECRET_KEY: B2 application key.
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BROWSER:
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MINIO_BROWSER: To disable web browser access, set this value to "off".
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UPDATE:
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MINIO_UPDATE: To turn off in-place upgrades, set this value to "off".
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EXAMPLES:
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1. Start minio gateway server for B2 backend.
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$ export MINIO_ACCESS_KEY=accountID
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$ export MINIO_SECRET_KEY=applicationKey
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$ {{.HelpName}}
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`
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minio.RegisterGatewayCommand(cli.Command{
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Name: b2Backend,
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Usage: "Backblaze B2.",
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Action: b2GatewayMain,
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CustomHelpTemplate: b2GatewayTemplate,
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HideHelpCommand: true,
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})
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}
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// Handler for 'minio gateway b2' command line.
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func b2GatewayMain(ctx *cli.Context) {
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minio.StartGateway(ctx, &B2{})
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}
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// B2 implements Minio Gateway
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type B2 struct{}
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// Name implements Gateway interface.
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func (g *B2) Name() string {
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return b2Backend
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}
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// NewGatewayLayer returns b2 gateway layer, implements ObjectLayer interface to
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// talk to B2 remote backend.
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func (g *B2) NewGatewayLayer(creds auth.Credentials) (minio.ObjectLayer, error) {
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ctx := context.Background()
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client, err := b2.AuthorizeAccount(ctx, creds.AccessKey, creds.SecretKey, b2.Transport(minio.NewCustomHTTPTransport()))
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if err != nil {
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return nil, err
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}
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return &b2Objects{
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creds: creds,
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b2Client: client,
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ctx: ctx,
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}, nil
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}
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// Production - Ready for production use?
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func (g *B2) Production() bool {
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// Not ready for production use just yet.
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return false
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}
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// b2Object implements gateway for Minio and BackBlaze B2 compatible object storage servers.
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type b2Objects struct {
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minio.GatewayUnsupported
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mu sync.Mutex
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creds auth.Credentials
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b2Client *b2.B2
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ctx context.Context
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}
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// Convert B2 errors to minio object layer errors.
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func b2ToObjectError(err error, params ...string) error {
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if err == nil {
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return nil
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}
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e, ok := err.(*errors.Error)
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if !ok {
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// Code should be fixed if this function is called without doing errors.Trace()
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// Else handling different situations in this function makes this function complicated.
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minio.ErrorIf(err, "Expected type *Error")
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return err
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}
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err = e.Cause
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bucket := ""
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object := ""
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uploadID := ""
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if len(params) >= 1 {
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bucket = params[0]
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}
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if len(params) == 2 {
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object = params[1]
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}
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if len(params) == 3 {
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uploadID = params[2]
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}
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// Following code is a non-exhaustive check to convert
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// B2 errors into S3 compatible errors.
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//
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// For a more complete information - https://www.backblaze.com/b2/docs/
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statusCode, code, msg := b2.Code(err)
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if statusCode == 0 {
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// We don't interpret non B2 errors. B2 errors have statusCode
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// to help us convert them to S3 object errors.
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return e
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}
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switch code {
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case "duplicate_bucket_name":
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err = minio.BucketAlreadyOwnedByYou{Bucket: bucket}
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case "bad_request":
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if object != "" {
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err = minio.ObjectNameInvalid{
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Bucket: bucket,
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Object: object,
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}
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} else if bucket != "" {
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err = minio.BucketNotFound{Bucket: bucket}
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}
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case "bad_bucket_id":
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err = minio.BucketNotFound{Bucket: bucket}
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case "file_not_present", "not_found":
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err = minio.ObjectNotFound{
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Bucket: bucket,
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Object: object,
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}
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case "cannot_delete_non_empty_bucket":
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err = minio.BucketNotEmpty{Bucket: bucket}
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}
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// Special interpretation like this is required for Multipart sessions.
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if strings.Contains(msg, "No active upload for") && uploadID != "" {
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err = minio.InvalidUploadID{UploadID: uploadID}
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}
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e.Cause = err
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return e
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}
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// Shutdown saves any gateway metadata to disk
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// if necessary and reload upon next restart.
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func (l *b2Objects) Shutdown() error {
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// TODO
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return nil
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}
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// StorageInfo is not relevant to B2 backend.
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func (l *b2Objects) StorageInfo() (si minio.StorageInfo) {
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return si
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}
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// MakeBucket creates a new container on B2 backend.
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func (l *b2Objects) MakeBucketWithLocation(bucket, location string) error {
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// location is ignored for B2 backend.
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// All buckets are set to private by default.
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_, err := l.b2Client.CreateBucket(l.ctx, bucket, bucketTypePrivate, nil, nil)
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return b2ToObjectError(errors.Trace(err), bucket)
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}
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func (l *b2Objects) reAuthorizeAccount() error {
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client, err := b2.AuthorizeAccount(l.ctx, l.creds.AccessKey, l.creds.SecretKey, b2.Transport(minio.NewCustomHTTPTransport()))
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if err != nil {
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return err
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}
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l.mu.Lock()
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l.b2Client.Update(client)
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l.mu.Unlock()
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return nil
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}
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// listBuckets is a wrapper similar to ListBuckets, which re-authorizes
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// the account and updates the B2 client safely. Once successfully
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// authorized performs the call again and returns list of buckets.
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// For any errors which are not actionable we return an error.
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func (l *b2Objects) listBuckets(err error) ([]*b2.Bucket, error) {
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if err != nil {
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if b2.Action(err) != b2.ReAuthenticate {
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return nil, err
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}
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if rerr := l.reAuthorizeAccount(); rerr != nil {
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return nil, rerr
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}
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}
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bktList, lerr := l.b2Client.ListBuckets(l.ctx)
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if lerr != nil {
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return l.listBuckets(lerr)
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}
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return bktList, nil
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}
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// Bucket - is a helper which provides a *Bucket instance
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// for performing an API operation. B2 API doesn't
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// provide a direct way to access the bucket so we need
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// to employ following technique.
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func (l *b2Objects) Bucket(bucket string) (*b2.Bucket, error) {
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bktList, err := l.listBuckets(nil)
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if err != nil {
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return nil, b2ToObjectError(errors.Trace(err), bucket)
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}
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for _, bkt := range bktList {
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if bkt.Name == bucket {
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return bkt, nil
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}
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}
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return nil, errors.Trace(minio.BucketNotFound{Bucket: bucket})
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}
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// GetBucketInfo gets bucket metadata..
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func (l *b2Objects) GetBucketInfo(bucket string) (bi minio.BucketInfo, err error) {
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if _, err = l.Bucket(bucket); err != nil {
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return bi, err
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}
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return minio.BucketInfo{
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Name: bucket,
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Created: time.Unix(0, 0),
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}, nil
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}
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// ListBuckets lists all B2 buckets
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func (l *b2Objects) ListBuckets() ([]minio.BucketInfo, error) {
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bktList, err := l.listBuckets(nil)
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if err != nil {
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return nil, err
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}
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var bktInfo []minio.BucketInfo
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for _, bkt := range bktList {
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bktInfo = append(bktInfo, minio.BucketInfo{
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Name: bkt.Name,
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Created: time.Unix(0, 0),
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})
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}
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return bktInfo, nil
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}
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// DeleteBucket deletes a bucket on B2
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func (l *b2Objects) DeleteBucket(bucket string) error {
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return err
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}
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err = bkt.DeleteBucket(l.ctx)
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return b2ToObjectError(errors.Trace(err), bucket)
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}
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// ListObjects lists all objects in B2 bucket filtered by prefix, returns upto at max 1000 entries at a time.
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func (l *b2Objects) ListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (loi minio.ListObjectsInfo, err error) {
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return loi, err
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}
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files, next, lerr := bkt.ListFileNames(l.ctx, maxKeys, marker, prefix, delimiter)
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if lerr != nil {
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return loi, b2ToObjectError(errors.Trace(lerr), bucket)
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}
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loi.IsTruncated = next != ""
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loi.NextMarker = next
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for _, file := range files {
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switch file.Status {
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case "folder":
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loi.Prefixes = append(loi.Prefixes, file.Name)
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case "upload":
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loi.Objects = append(loi.Objects, minio.ObjectInfo{
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Bucket: bucket,
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Name: file.Name,
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ModTime: file.Timestamp,
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Size: file.Size,
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ETag: minio.ToS3ETag(file.Info.ID),
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ContentType: file.Info.ContentType,
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UserDefined: file.Info.Info,
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})
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}
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}
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return loi, nil
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}
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// ListObjectsV2 lists all objects in B2 bucket filtered by prefix, returns upto max 1000 entries at a time.
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func (l *b2Objects) ListObjectsV2(bucket, prefix, continuationToken, delimiter string, maxKeys int,
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fetchOwner bool, startAfter string) (loi minio.ListObjectsV2Info, err error) {
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// fetchOwner, startAfter are not supported and unused.
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return loi, err
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}
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files, next, lerr := bkt.ListFileNames(l.ctx, maxKeys, continuationToken, prefix, delimiter)
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if lerr != nil {
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return loi, b2ToObjectError(errors.Trace(lerr), bucket)
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}
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loi.IsTruncated = next != ""
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loi.ContinuationToken = continuationToken
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loi.NextContinuationToken = next
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for _, file := range files {
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switch file.Status {
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case "folder":
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loi.Prefixes = append(loi.Prefixes, file.Name)
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case "upload":
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loi.Objects = append(loi.Objects, minio.ObjectInfo{
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Bucket: bucket,
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Name: file.Name,
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ModTime: file.Timestamp,
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Size: file.Size,
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ETag: minio.ToS3ETag(file.Info.ID),
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ContentType: file.Info.ContentType,
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UserDefined: file.Info.Info,
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})
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}
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}
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return loi, nil
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}
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// GetObject reads an object from B2. Supports additional
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// parameters like offset and length which are synonymous with
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// HTTP Range requests.
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//
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// startOffset indicates the starting read location of the object.
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// length indicates the total length of the object.
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func (l *b2Objects) GetObject(bucket string, object string, startOffset int64, length int64, writer io.Writer, etag string) error {
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return err
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}
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reader, err := bkt.DownloadFileByName(l.ctx, object, startOffset, length)
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if err != nil {
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return b2ToObjectError(errors.Trace(err), bucket, object)
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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 b2ToObjectError(errors.Trace(err), bucket, object)
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}
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// GetObjectInfo reads object info and replies back ObjectInfo
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func (l *b2Objects) GetObjectInfo(bucket string, object string) (objInfo minio.ObjectInfo, err error) {
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return objInfo, err
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}
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f, err := bkt.DownloadFileByName(l.ctx, object, 0, 1)
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if err != nil {
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return objInfo, b2ToObjectError(errors.Trace(err), bucket, object)
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}
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f.Close()
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fi, err := bkt.File(f.ID, object).GetFileInfo(l.ctx)
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if err != nil {
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return objInfo, b2ToObjectError(errors.Trace(err), bucket, object)
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}
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return minio.ObjectInfo{
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Bucket: bucket,
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Name: object,
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ETag: minio.ToS3ETag(fi.ID),
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Size: fi.Size,
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ModTime: fi.Timestamp,
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ContentType: fi.ContentType,
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UserDefined: fi.Info,
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}, nil
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}
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// In B2 - You must always include the X-Bz-Content-Sha1 header with
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// your upload request. The value you provide can be:
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// (1) the 40-character hex checksum of the file,
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// (2) the string hex_digits_at_end, or
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// (3) the string do_not_verify.
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// For more reference - https://www.backblaze.com/b2/docs/uploading.html
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//
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// In our case we are going to use (2) option
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const sha1AtEOF = "hex_digits_at_end"
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// With the second option mentioned above, you append the 40-character hex sha1
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// to the end of the request body, immediately after the contents of the file
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// being uploaded. Note that the content length is the size of the file plus 40
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// of the original size of the reader.
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//
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// newB2Reader implements a B2 compatible reader by wrapping the hash.Reader into
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// a new io.Reader which will emit out the sha1 hex digits at io.EOF.
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// It also means that your overall content size is now original size + 40 bytes.
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// Additionally this reader also verifies Hash encapsulated inside hash.Reader
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// at io.EOF if the verification failed we return an error and do not send
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// the content to server.
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func newB2Reader(r *h2.Reader, size int64) *Reader {
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return &Reader{
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r: r,
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size: size,
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sha1Hash: sha1.New(),
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}
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}
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// Reader - is a Reader wraps the hash.Reader which will emit out the sha1
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// hex digits at io.EOF. It also means that your overall content size is
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// now original size + 40 bytes. Additionally this reader also verifies
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// Hash encapsulated inside hash.Reader at io.EOF if the verification
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// failed we return an error and do not send the content to server.
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type Reader struct {
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r *h2.Reader
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size int64
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sha1Hash hash.Hash
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isEOF bool
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buf *strings.Reader
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}
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// Size - Returns the total size of Reader.
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func (nb *Reader) Size() int64 { return nb.size + 40 }
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func (nb *Reader) Read(p []byte) (int, error) {
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if nb.isEOF {
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return nb.buf.Read(p)
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}
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// Read into hash to update the on going checksum.
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n, err := io.TeeReader(nb.r, nb.sha1Hash).Read(p)
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if err == io.EOF {
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// Stream is not corrupted on this end
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// now fill in the last 40 bytes of sha1 hex
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// so that the server can verify the stream on
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// their end.
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err = nil
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nb.isEOF = true
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nb.buf = strings.NewReader(fmt.Sprintf("%x", nb.sha1Hash.Sum(nil)))
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}
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return n, err
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}
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// PutObject uploads the single upload to B2 backend by using *b2_upload_file* API, uploads upto 5GiB.
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func (l *b2Objects) PutObject(bucket string, object string, data *h2.Reader, metadata map[string]string) (objInfo minio.ObjectInfo, err error) {
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bkt, err := l.Bucket(bucket)
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if err != nil {
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return objInfo, err
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}
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contentType := metadata["content-type"]
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delete(metadata, "content-type")
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var u *b2.URL
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u, err = bkt.GetUploadURL(l.ctx)
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if err != nil {
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return objInfo, b2ToObjectError(errors.Trace(err), bucket, object)
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}
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hr := newB2Reader(data, data.Size())
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var f *b2.File
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f, err = u.UploadFile(l.ctx, hr, int(hr.Size()), object, contentType, sha1AtEOF, metadata)
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if err != nil {
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return objInfo, b2ToObjectError(errors.Trace(err), bucket, object)
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}
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var fi *b2.FileInfo
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fi, err = f.GetFileInfo(l.ctx)
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if err != nil {
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return objInfo, b2ToObjectError(errors.Trace(err), bucket, object)
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}
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return minio.ObjectInfo{
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Bucket: bucket,
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Name: object,
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ETag: minio.ToS3ETag(fi.ID),
|
|
Size: fi.Size,
|
|
ModTime: fi.Timestamp,
|
|
ContentType: fi.ContentType,
|
|
UserDefined: fi.Info,
|
|
}, nil
|
|
}
|
|
|
|
// DeleteObject deletes a blob in bucket
|
|
func (l *b2Objects) DeleteObject(bucket string, object string) error {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
reader, err := bkt.DownloadFileByName(l.ctx, object, 0, 1)
|
|
if err != nil {
|
|
return b2ToObjectError(errors.Trace(err), bucket, object)
|
|
}
|
|
io.Copy(ioutil.Discard, reader)
|
|
reader.Close()
|
|
err = bkt.File(reader.ID, object).DeleteFileVersion(l.ctx)
|
|
return b2ToObjectError(errors.Trace(err), bucket, object)
|
|
}
|
|
|
|
// ListMultipartUploads lists all multipart uploads.
|
|
func (l *b2Objects) ListMultipartUploads(bucket string, prefix string, keyMarker string, uploadIDMarker string,
|
|
delimiter string, maxUploads int) (lmi minio.ListMultipartsInfo, err error) {
|
|
// keyMarker, prefix, delimiter are all ignored, Backblaze B2 doesn't support any
|
|
// of these parameters only equivalent parameter is uploadIDMarker.
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return lmi, err
|
|
}
|
|
// The maximum number of files to return from this call.
|
|
// The default value is 100, and the maximum allowed is 100.
|
|
if maxUploads > 100 {
|
|
maxUploads = 100
|
|
}
|
|
largeFiles, nextMarker, err := bkt.ListUnfinishedLargeFiles(l.ctx, uploadIDMarker, maxUploads)
|
|
if err != nil {
|
|
return lmi, b2ToObjectError(errors.Trace(err), bucket)
|
|
}
|
|
lmi = minio.ListMultipartsInfo{
|
|
MaxUploads: maxUploads,
|
|
}
|
|
if nextMarker != "" {
|
|
lmi.IsTruncated = true
|
|
lmi.NextUploadIDMarker = nextMarker
|
|
}
|
|
for _, largeFile := range largeFiles {
|
|
lmi.Uploads = append(lmi.Uploads, minio.MultipartInfo{
|
|
Object: largeFile.Name,
|
|
UploadID: largeFile.ID,
|
|
Initiated: largeFile.Timestamp,
|
|
})
|
|
}
|
|
return lmi, nil
|
|
}
|
|
|
|
// NewMultipartUpload upload object in multiple parts, uses B2's LargeFile upload API.
|
|
// Large files can range in size from 5MB to 10TB.
|
|
// Each large file must consist of at least 2 parts, and all of the parts except the
|
|
// last one must be at least 5MB in size. The last part must contain at least one byte.
|
|
// For more information - https://www.backblaze.com/b2/docs/large_files.html
|
|
func (l *b2Objects) NewMultipartUpload(bucket string, object string, metadata map[string]string) (string, error) {
|
|
var uploadID string
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return uploadID, err
|
|
}
|
|
|
|
contentType := metadata["content-type"]
|
|
delete(metadata, "content-type")
|
|
lf, err := bkt.StartLargeFile(l.ctx, object, contentType, metadata)
|
|
if err != nil {
|
|
return uploadID, b2ToObjectError(errors.Trace(err), bucket, object)
|
|
}
|
|
|
|
return lf.ID, nil
|
|
}
|
|
|
|
// PutObjectPart puts a part of object in bucket, uses B2's LargeFile upload API.
|
|
func (l *b2Objects) PutObjectPart(bucket string, object string, uploadID string, partID int, data *h2.Reader) (pi minio.PartInfo, err error) {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return pi, err
|
|
}
|
|
|
|
fc, err := bkt.File(uploadID, object).CompileParts(0, nil).GetUploadPartURL(l.ctx)
|
|
if err != nil {
|
|
return pi, b2ToObjectError(errors.Trace(err), bucket, object, uploadID)
|
|
}
|
|
|
|
hr := newB2Reader(data, data.Size())
|
|
sha1, err := fc.UploadPart(l.ctx, hr, sha1AtEOF, int(hr.Size()), partID)
|
|
if err != nil {
|
|
return pi, b2ToObjectError(errors.Trace(err), bucket, object, uploadID)
|
|
}
|
|
|
|
return minio.PartInfo{
|
|
PartNumber: partID,
|
|
LastModified: minio.UTCNow(),
|
|
ETag: minio.ToS3ETag(sha1),
|
|
Size: data.Size(),
|
|
}, nil
|
|
}
|
|
|
|
// ListObjectParts returns all object parts for specified object in specified bucket, uses B2's LargeFile upload API.
|
|
func (l *b2Objects) ListObjectParts(bucket string, object string, uploadID string, partNumberMarker int, maxParts int) (lpi minio.ListPartsInfo, err error) {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return lpi, err
|
|
}
|
|
lpi = minio.ListPartsInfo{
|
|
Bucket: bucket,
|
|
Object: object,
|
|
UploadID: uploadID,
|
|
MaxParts: maxParts,
|
|
PartNumberMarker: partNumberMarker,
|
|
}
|
|
// startPartNumber must be in the range 1 - 10000 for B2.
|
|
partNumberMarker++
|
|
partsList, next, err := bkt.File(uploadID, object).ListParts(l.ctx, partNumberMarker, maxParts)
|
|
if err != nil {
|
|
return lpi, b2ToObjectError(errors.Trace(err), bucket, object, uploadID)
|
|
}
|
|
if next != 0 {
|
|
lpi.IsTruncated = true
|
|
lpi.NextPartNumberMarker = next
|
|
}
|
|
for _, part := range partsList {
|
|
lpi.Parts = append(lpi.Parts, minio.PartInfo{
|
|
PartNumber: part.Number,
|
|
ETag: minio.ToS3ETag(part.SHA1),
|
|
Size: part.Size,
|
|
})
|
|
}
|
|
return lpi, nil
|
|
}
|
|
|
|
// AbortMultipartUpload aborts a on going multipart upload, uses B2's LargeFile upload API.
|
|
func (l *b2Objects) AbortMultipartUpload(bucket string, object string, uploadID string) error {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = bkt.File(uploadID, object).CompileParts(0, nil).CancelLargeFile(l.ctx)
|
|
return b2ToObjectError(errors.Trace(err), bucket, object, uploadID)
|
|
}
|
|
|
|
// CompleteMultipartUpload completes ongoing multipart upload and finalizes object, uses B2's LargeFile upload API.
|
|
func (l *b2Objects) CompleteMultipartUpload(bucket string, object string, uploadID string, uploadedParts []minio.CompletePart) (oi minio.ObjectInfo, err error) {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return oi, err
|
|
}
|
|
hashes := make(map[int]string)
|
|
for i, uploadedPart := range uploadedParts {
|
|
// B2 requires contigous part numbers starting with 1, they do not support
|
|
// hand picking part numbers, we return an S3 compatible error instead.
|
|
if i+1 != uploadedPart.PartNumber {
|
|
return oi, b2ToObjectError(errors.Trace(minio.InvalidPart{}), bucket, object, uploadID)
|
|
}
|
|
|
|
// Trim "-1" suffix in ETag as PutObjectPart() treats B2 returned SHA1 as ETag.
|
|
hashes[uploadedPart.PartNumber] = strings.TrimSuffix(uploadedPart.ETag, "-1")
|
|
}
|
|
|
|
if _, err = bkt.File(uploadID, object).CompileParts(0, hashes).FinishLargeFile(l.ctx); err != nil {
|
|
return oi, b2ToObjectError(errors.Trace(err), bucket, object, uploadID)
|
|
}
|
|
|
|
return l.GetObjectInfo(bucket, object)
|
|
}
|
|
|
|
// SetBucketPolicy - B2 supports 2 types of bucket policies:
|
|
// bucketType.AllPublic - bucketTypeReadOnly means that anybody can download the files is the bucket;
|
|
// bucketType.AllPrivate - bucketTypePrivate means that you need an authorization token to download them.
|
|
// Default is AllPrivate for all buckets.
|
|
func (l *b2Objects) SetBucketPolicy(bucket string, policyInfo policy.BucketAccessPolicy) error {
|
|
var policies []minio.BucketAccessPolicy
|
|
|
|
for prefix, policy := range policy.GetPolicies(policyInfo.Statements, bucket) {
|
|
policies = append(policies, minio.BucketAccessPolicy{
|
|
Prefix: prefix,
|
|
Policy: policy,
|
|
})
|
|
}
|
|
prefix := bucket + "/*" // For all objects inside the bucket.
|
|
if len(policies) != 1 {
|
|
return errors.Trace(minio.NotImplemented{})
|
|
}
|
|
if policies[0].Prefix != prefix {
|
|
return errors.Trace(minio.NotImplemented{})
|
|
}
|
|
if policies[0].Policy != policy.BucketPolicyReadOnly {
|
|
return errors.Trace(minio.NotImplemented{})
|
|
}
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
bkt.Type = bucketTypeReadOnly
|
|
_, err = bkt.Update(l.ctx)
|
|
return b2ToObjectError(errors.Trace(err))
|
|
}
|
|
|
|
// GetBucketPolicy, returns the current bucketType from B2 backend and convert
|
|
// it into S3 compatible bucket policy info.
|
|
func (l *b2Objects) GetBucketPolicy(bucket string) (policy.BucketAccessPolicy, error) {
|
|
policyInfo := policy.BucketAccessPolicy{Version: "2012-10-17"}
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return policyInfo, err
|
|
}
|
|
if bkt.Type == bucketTypeReadOnly {
|
|
policyInfo.Statements = policy.SetPolicy(policyInfo.Statements, policy.BucketPolicyReadOnly, bucket, "")
|
|
return policyInfo, nil
|
|
}
|
|
// bkt.Type can also be snapshot, but it is only allowed through B2 browser console,
|
|
// just return back as policy not found for all cases.
|
|
// CreateBucket always sets the value to allPrivate by default.
|
|
return policy.BucketAccessPolicy{}, errors.Trace(minio.PolicyNotFound{Bucket: bucket})
|
|
}
|
|
|
|
// DeleteBucketPolicy - resets the bucketType of bucket on B2 to 'allPrivate'.
|
|
func (l *b2Objects) DeleteBucketPolicy(bucket string) error {
|
|
bkt, err := l.Bucket(bucket)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
bkt.Type = bucketTypePrivate
|
|
_, err = bkt.Update(l.ctx)
|
|
return b2ToObjectError(errors.Trace(err))
|
|
}
|
|
|