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767 lines
23 KiB
Go
767 lines
23 KiB
Go
/*
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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 cmd
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import (
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"crypto/md5"
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"encoding/base64"
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"encoding/hex"
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"fmt"
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"hash"
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"io"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/Azure/azure-sdk-for-go/storage"
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"github.com/minio/minio-go/pkg/policy"
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"github.com/minio/sha256-simd"
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)
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const globalAzureAPIVersion = "2016-05-31"
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// Canonicalize the metadata headers, without this azure-sdk calculates
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// incorrect signature. This attempt to canonicalize is to convert
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// any HTTP header which is of form say `accept-encoding` should be
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// converted to `Accept-Encoding` in its canonical form.
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// Also replaces X-Amz-Meta prefix with X-Ms-Meta as Azure expects user
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// defined metadata to have X-Ms-Meta prefix.
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func s3ToAzureHeaders(headers map[string]string) (newHeaders map[string]string) {
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newHeaders = make(map[string]string)
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for k, v := range headers {
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k = http.CanonicalHeaderKey(k)
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if strings.HasPrefix(k, "X-Amz-Meta") {
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k = strings.Replace(k, "X-Amz-Meta", "X-Ms-Meta", -1)
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}
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newHeaders[k] = v
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}
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return newHeaders
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}
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// Prefix user metadata with "X-Amz-Meta-".
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// client.GetBlobMetadata() already strips "X-Ms-Meta-"
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func azureToS3Metadata(meta map[string]string) (newMeta map[string]string) {
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newMeta = make(map[string]string)
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for k, v := range meta {
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k = "X-Amz-Meta-" + k
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newMeta[k] = v
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}
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return newMeta
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}
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// To store metadata during NewMultipartUpload which will be used after
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// CompleteMultipartUpload to call SetBlobMetadata.
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type azureMultipartMetaInfo struct {
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meta map[string]map[string]string
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*sync.Mutex
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}
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// Return metadata map of the multipart object.
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func (a *azureMultipartMetaInfo) get(key string) map[string]string {
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a.Lock()
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defer a.Unlock()
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return a.meta[key]
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}
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// Set metadata map for the multipart object.
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func (a *azureMultipartMetaInfo) set(key string, value map[string]string) {
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a.Lock()
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defer a.Unlock()
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a.meta[key] = value
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}
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// Delete metadata map for the multipart object.
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func (a *azureMultipartMetaInfo) del(key string) {
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a.Lock()
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defer a.Unlock()
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delete(a.meta, key)
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}
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// azureObjects - Implements Object layer for Azure blob storage.
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type azureObjects struct {
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client storage.BlobStorageClient // Azure sdk client
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metaInfo azureMultipartMetaInfo
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}
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// Convert azure errors to minio object layer errors.
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func azureToObjectError(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.(*Error)
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if !ok {
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// Code should be fixed if this function is called without doing traceError()
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// Else handling different situations in this function makes this function complicated.
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errorIf(err, "Expected type *Error")
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return err
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}
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err = e.e
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bucket := ""
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object := ""
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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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azureErr, ok := err.(storage.AzureStorageServiceError)
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if !ok {
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// We don't interpret non Azure errors. As azure errors will
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// have StatusCode to help to convert to object errors.
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return e
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}
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switch azureErr.Code {
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case "ContainerAlreadyExists":
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err = BucketExists{Bucket: bucket}
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case "InvalidResourceName":
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err = BucketNameInvalid{Bucket: bucket}
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default:
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switch azureErr.StatusCode {
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case http.StatusNotFound:
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if object != "" {
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err = ObjectNotFound{bucket, object}
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} else {
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err = BucketNotFound{Bucket: bucket}
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}
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case http.StatusBadRequest:
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err = BucketNameInvalid{Bucket: bucket}
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}
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}
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e.e = err
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return e
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}
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// Inits azure blob storage client and returns azureObjects.
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func newAzureLayer(endPoint string, account, key string, secure bool) (GatewayLayer, error) {
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if endPoint == "" {
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endPoint = storage.DefaultBaseURL
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}
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c, err := storage.NewClient(account, key, endPoint, globalAzureAPIVersion, secure)
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if err != nil {
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return &azureObjects{}, err
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}
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return &azureObjects{
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client: c.GetBlobService(),
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metaInfo: azureMultipartMetaInfo{
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meta: make(map[string]map[string]string),
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Mutex: &sync.Mutex{},
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},
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}, nil
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}
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// Shutdown - save any gateway metadata to disk
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// if necessary and reload upon next restart.
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func (a *azureObjects) Shutdown() error {
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// TODO
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return nil
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}
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// StorageInfo - Not relevant to Azure backend.
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func (a *azureObjects) StorageInfo() StorageInfo {
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return StorageInfo{}
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}
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// MakeBucketWithLocation - Create a new container on azure backend.
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func (a *azureObjects) MakeBucketWithLocation(bucket, location string) error {
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err := a.client.CreateContainer(bucket, storage.ContainerAccessTypePrivate)
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return azureToObjectError(traceError(err), bucket)
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}
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// GetBucketInfo - Get bucket metadata..
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func (a *azureObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
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// Azure does not have an equivalent call, hence use ListContainers.
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resp, err := a.client.ListContainers(storage.ListContainersParameters{
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Prefix: bucket,
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})
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if err != nil {
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return BucketInfo{}, azureToObjectError(traceError(err), bucket)
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}
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for _, container := range resp.Containers {
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if container.Name == bucket {
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t, e := time.Parse(time.RFC1123, container.Properties.LastModified)
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if e == nil {
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return BucketInfo{
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Name: bucket,
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Created: t,
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}, nil
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} // else continue
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}
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}
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return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
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}
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// ListBuckets - Lists all azure containers, uses Azure equivalent ListContainers.
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func (a *azureObjects) ListBuckets() (buckets []BucketInfo, err error) {
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resp, err := a.client.ListContainers(storage.ListContainersParameters{})
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if err != nil {
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return nil, azureToObjectError(traceError(err))
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}
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for _, container := range resp.Containers {
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t, e := time.Parse(time.RFC1123, container.Properties.LastModified)
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if e != nil {
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return nil, traceError(e)
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}
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buckets = append(buckets, BucketInfo{
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Name: container.Name,
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Created: t,
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})
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}
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return buckets, nil
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}
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// DeleteBucket - delete a container on azure, uses Azure equivalent DeleteContainer.
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func (a *azureObjects) DeleteBucket(bucket string) error {
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return azureToObjectError(traceError(a.client.DeleteContainer(bucket)), bucket)
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}
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// ListObjects - lists all blobs on azure with in a container filtered by prefix
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// and marker, uses Azure equivalent ListBlobs.
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func (a *azureObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
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resp, err := a.client.ListBlobs(bucket, storage.ListBlobsParameters{
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Prefix: prefix,
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Marker: marker,
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Delimiter: delimiter,
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MaxResults: uint(maxKeys),
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})
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if err != nil {
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return result, azureToObjectError(traceError(err), bucket, prefix)
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}
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result.IsTruncated = resp.NextMarker != ""
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result.NextMarker = resp.NextMarker
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for _, object := range resp.Blobs {
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t, e := time.Parse(time.RFC1123, object.Properties.LastModified)
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if e != nil {
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continue
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}
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result.Objects = append(result.Objects, ObjectInfo{
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Bucket: bucket,
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Name: object.Name,
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ModTime: t,
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Size: object.Properties.ContentLength,
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ETag: canonicalizeETag(object.Properties.Etag),
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ContentType: object.Properties.ContentType,
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ContentEncoding: object.Properties.ContentEncoding,
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})
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}
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result.Prefixes = resp.BlobPrefixes
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return result, nil
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}
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// ListObjectsV2 - list all blobs in Azure bucket filtered by prefix
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func (a *azureObjects) ListObjectsV2(bucket, prefix, continuationToken string, fetchOwner bool, delimiter string, maxKeys int) (result ListObjectsV2Info, err error) {
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resp, err := a.client.ListBlobs(bucket, storage.ListBlobsParameters{
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Prefix: prefix,
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Marker: continuationToken,
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Delimiter: delimiter,
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MaxResults: uint(maxKeys),
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})
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if err != nil {
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return result, azureToObjectError(traceError(err), bucket, prefix)
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}
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// If NextMarker is not empty, this means response is truncated and NextContinuationToken should be set
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if resp.NextMarker != "" {
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result.IsTruncated = true
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result.NextContinuationToken = resp.NextMarker
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}
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for _, object := range resp.Blobs {
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t, e := time.Parse(time.RFC1123, object.Properties.LastModified)
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if e != nil {
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continue
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}
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result.Objects = append(result.Objects, ObjectInfo{
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Bucket: bucket,
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Name: object.Name,
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ModTime: t,
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Size: object.Properties.ContentLength,
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ETag: canonicalizeETag(object.Properties.Etag),
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ContentType: object.Properties.ContentType,
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ContentEncoding: object.Properties.ContentEncoding,
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})
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}
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result.Prefixes = resp.BlobPrefixes
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return result, nil
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}
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// GetObject - reads an object from azure. 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 (a *azureObjects) GetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) error {
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byteRange := fmt.Sprintf("%d-", startOffset)
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if length > 0 && startOffset > 0 {
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byteRange = fmt.Sprintf("%d-%d", startOffset, startOffset+length-1)
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}
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var rc io.ReadCloser
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var err error
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if startOffset == 0 && length == 0 {
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rc, err = a.client.GetBlob(bucket, object)
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} else {
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rc, err = a.client.GetBlobRange(bucket, object, byteRange, nil)
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}
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if err != nil {
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return azureToObjectError(traceError(err), bucket, object)
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}
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_, err = io.Copy(writer, rc)
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rc.Close()
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return traceError(err)
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}
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// GetObjectInfo - reads blob metadata properties and replies back ObjectInfo,
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// uses zure equivalent GetBlobProperties.
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func (a *azureObjects) GetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
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blobMeta, err := a.client.GetBlobMetadata(bucket, object)
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if err != nil {
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return objInfo, azureToObjectError(traceError(err), bucket, object)
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}
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meta := azureToS3Metadata(blobMeta)
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prop, err := a.client.GetBlobProperties(bucket, object)
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if err != nil {
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return objInfo, azureToObjectError(traceError(err), bucket, object)
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}
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t, err := time.Parse(time.RFC1123, prop.LastModified)
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if err != nil {
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return objInfo, traceError(err)
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}
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if prop.ContentEncoding != "" {
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meta["Content-Encoding"] = prop.ContentEncoding
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}
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meta["Content-Type"] = prop.ContentType
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objInfo = ObjectInfo{
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Bucket: bucket,
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UserDefined: meta,
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ETag: canonicalizeETag(prop.Etag),
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ModTime: t,
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Name: object,
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Size: prop.ContentLength,
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}
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return objInfo, nil
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}
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// PutObject - Create a new blob with the incoming data,
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// uses Azure equivalent CreateBlockBlobFromReader.
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func (a *azureObjects) PutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
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var sha256Writer hash.Hash
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var md5sumWriter hash.Hash
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var writers []io.Writer
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md5sum := metadata["etag"]
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delete(metadata, "etag")
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teeReader := data
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if sha256sum != "" {
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sha256Writer = sha256.New()
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writers = append(writers, sha256Writer)
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}
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if md5sum != "" {
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md5sumWriter = md5.New()
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writers = append(writers, md5sumWriter)
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}
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if len(writers) > 0 {
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teeReader = io.TeeReader(data, io.MultiWriter(writers...))
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}
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err = a.client.CreateBlockBlobFromReader(bucket, object, uint64(size), teeReader, s3ToAzureHeaders(metadata))
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if err != nil {
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return objInfo, azureToObjectError(traceError(err), bucket, object)
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}
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if md5sum != "" {
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newMD5sum := hex.EncodeToString(md5sumWriter.Sum(nil))
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if newMD5sum != md5sum {
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a.client.DeleteBlob(bucket, object, nil)
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return ObjectInfo{}, azureToObjectError(traceError(BadDigest{md5sum, newMD5sum}))
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}
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}
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if sha256sum != "" {
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newSHA256sum := hex.EncodeToString(sha256Writer.Sum(nil))
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if newSHA256sum != sha256sum {
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a.client.DeleteBlob(bucket, object, nil)
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return ObjectInfo{}, azureToObjectError(traceError(SHA256Mismatch{}))
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}
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}
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return a.GetObjectInfo(bucket, object)
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}
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// CopyObject - Copies a blob from source container to destination container.
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// Uses Azure equivalent CopyBlob API.
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func (a *azureObjects) CopyObject(srcBucket, srcObject, destBucket, destObject string, metadata map[string]string) (objInfo ObjectInfo, err error) {
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err = a.client.CopyBlob(destBucket, destObject, a.client.GetBlobURL(srcBucket, srcObject))
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if err != nil {
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return objInfo, azureToObjectError(traceError(err), srcBucket, srcObject)
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}
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return a.GetObjectInfo(destBucket, destObject)
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}
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// DeleteObject - Deletes a blob on azure container, uses Azure
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// equivalent DeleteBlob API.
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func (a *azureObjects) DeleteObject(bucket, object string) error {
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err := a.client.DeleteBlob(bucket, object, nil)
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if err != nil {
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return azureToObjectError(traceError(err), bucket, object)
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}
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return nil
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}
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// ListMultipartUploads - Incomplete implementation, for now just return the prefix if it is an incomplete upload.
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// FIXME: Full ListMultipartUploads is not supported yet. It is supported just enough to help our client libs to
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// support re-uploads. a.client.ListBlobs() can be made to return entries which include uncommitted blobs using
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// which we need to filter out the committed blobs to get the list of uncommitted blobs.
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func (a *azureObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error) {
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result.MaxUploads = maxUploads
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result.Prefix = prefix
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result.Delimiter = delimiter
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meta := a.metaInfo.get(prefix)
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if meta == nil {
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// In case minio was restarted after NewMultipartUpload and before CompleteMultipartUpload we expect
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// the client to do a fresh upload so that any metadata like content-type are sent again in the
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// NewMultipartUpload.
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return result, nil
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}
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result.Uploads = []uploadMetadata{{prefix, prefix, UTCNow(), "", nil}}
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return result, nil
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}
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// NewMultipartUpload - Use Azure equivalent CreateBlockBlob.
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func (a *azureObjects) NewMultipartUpload(bucket, object string, metadata map[string]string) (uploadID string, err error) {
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// Azure doesn't return a unique upload ID and we use object name in place of it. Azure allows multiple uploads to
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// co-exist as long as the user keeps the blocks uploaded (in block blobs) unique amongst concurrent upload attempts.
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// Each concurrent client, keeps its own blockID list which it can commit.
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uploadID = object
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if metadata == nil {
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// Store an empty map as a placeholder else ListObjectParts/PutObjectPart will not work properly.
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metadata = make(map[string]string)
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} else {
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metadata = s3ToAzureHeaders(metadata)
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}
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a.metaInfo.set(uploadID, metadata)
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return uploadID, nil
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}
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// CopyObjectPart - Not implemented.
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func (a *azureObjects) CopyObjectPart(srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int, startOffset int64, length int64) (info PartInfo, err error) {
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return info, traceError(NotImplemented{})
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}
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// Encode partID+md5Hex to a blockID.
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func azureGetBlockID(partID int, md5Hex string) string {
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return base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%.5d.%s", partID, md5Hex)))
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}
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// Decode blockID to partID+md5Hex.
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func azureParseBlockID(blockID string) (int, string, error) {
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idByte, err := base64.StdEncoding.DecodeString(blockID)
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if err != nil {
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return 0, "", traceError(err)
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}
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idStr := string(idByte)
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splitRes := strings.Split(idStr, ".")
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if len(splitRes) != 2 {
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return 0, "", traceError(errUnexpected)
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}
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partID, err := strconv.Atoi(splitRes[0])
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if err != nil {
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return 0, "", traceError(err)
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}
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return partID, splitRes[1], nil
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}
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// PutObjectPart - Use Azure equivalent PutBlockWithLength.
|
|
func (a *azureObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string, sha256sum string) (info PartInfo, err error) {
|
|
if meta := a.metaInfo.get(uploadID); meta == nil {
|
|
return info, traceError(InvalidUploadID{})
|
|
}
|
|
var sha256Writer hash.Hash
|
|
var md5sumWriter hash.Hash
|
|
var etag string
|
|
|
|
var writers []io.Writer
|
|
|
|
if sha256sum != "" {
|
|
sha256Writer = sha256.New()
|
|
writers = append(writers, sha256Writer)
|
|
}
|
|
|
|
if md5Hex != "" {
|
|
md5sumWriter = md5.New()
|
|
writers = append(writers, md5sumWriter)
|
|
etag = md5Hex
|
|
} else {
|
|
// Generate random ETag.
|
|
etag = getMD5Hash([]byte(mustGetUUID()))
|
|
}
|
|
|
|
teeReader := data
|
|
|
|
if len(writers) > 0 {
|
|
teeReader = io.TeeReader(data, io.MultiWriter(writers...))
|
|
}
|
|
|
|
id := azureGetBlockID(partID, etag)
|
|
err = a.client.PutBlockWithLength(bucket, object, id, uint64(size), teeReader, nil)
|
|
if err != nil {
|
|
return info, azureToObjectError(traceError(err), bucket, object)
|
|
}
|
|
|
|
if md5Hex != "" {
|
|
newMD5sum := hex.EncodeToString(md5sumWriter.Sum(nil))
|
|
if newMD5sum != md5Hex {
|
|
a.client.DeleteBlob(bucket, object, nil)
|
|
return PartInfo{}, azureToObjectError(traceError(BadDigest{md5Hex, newMD5sum}))
|
|
}
|
|
}
|
|
|
|
if sha256sum != "" {
|
|
newSHA256sum := hex.EncodeToString(sha256Writer.Sum(nil))
|
|
if newSHA256sum != sha256sum {
|
|
return PartInfo{}, azureToObjectError(traceError(SHA256Mismatch{}))
|
|
}
|
|
}
|
|
|
|
info.PartNumber = partID
|
|
info.ETag = etag
|
|
info.LastModified = UTCNow()
|
|
info.Size = size
|
|
return info, nil
|
|
}
|
|
|
|
// ListObjectParts - Use Azure equivalent GetBlockList.
|
|
func (a *azureObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker int, maxParts int) (result ListPartsInfo, err error) {
|
|
result.Bucket = bucket
|
|
result.Object = object
|
|
result.UploadID = uploadID
|
|
result.MaxParts = maxParts
|
|
|
|
if meta := a.metaInfo.get(uploadID); meta == nil {
|
|
return result, nil
|
|
}
|
|
resp, err := a.client.GetBlockList(bucket, object, storage.BlockListTypeUncommitted)
|
|
if err != nil {
|
|
return result, azureToObjectError(traceError(err), bucket, object)
|
|
}
|
|
tmpMaxParts := 0
|
|
partCount := 0 // Used for figuring out IsTruncated.
|
|
nextPartNumberMarker := 0
|
|
for _, part := range resp.UncommittedBlocks {
|
|
if tmpMaxParts == maxParts {
|
|
// Also takes care of the case if maxParts = 0
|
|
break
|
|
}
|
|
partCount++
|
|
partID, md5Hex, err := azureParseBlockID(part.Name)
|
|
if err != nil {
|
|
return result, err
|
|
}
|
|
if partID <= partNumberMarker {
|
|
continue
|
|
}
|
|
result.Parts = append(result.Parts, PartInfo{
|
|
partID,
|
|
UTCNow(),
|
|
md5Hex,
|
|
part.Size,
|
|
})
|
|
tmpMaxParts++
|
|
nextPartNumberMarker = partID
|
|
}
|
|
if partCount < len(resp.UncommittedBlocks) {
|
|
result.IsTruncated = true
|
|
result.NextPartNumberMarker = nextPartNumberMarker
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
// AbortMultipartUpload - Not Implemented.
|
|
// There is no corresponding API in azure to abort an incomplete upload. The uncommmitted blocks
|
|
// gets deleted after one week.
|
|
func (a *azureObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
|
|
a.metaInfo.del(uploadID)
|
|
return nil
|
|
}
|
|
|
|
// CompleteMultipartUpload - Use Azure equivalent PutBlockList.
|
|
func (a *azureObjects) CompleteMultipartUpload(bucket, object, uploadID string, uploadedParts []completePart) (objInfo ObjectInfo, err error) {
|
|
meta := a.metaInfo.get(uploadID)
|
|
if meta == nil {
|
|
return objInfo, traceError(InvalidUploadID{uploadID})
|
|
}
|
|
var blocks []storage.Block
|
|
for _, part := range uploadedParts {
|
|
blocks = append(blocks, storage.Block{
|
|
ID: azureGetBlockID(part.PartNumber, part.ETag),
|
|
Status: storage.BlockStatusUncommitted,
|
|
})
|
|
}
|
|
err = a.client.PutBlockList(bucket, object, blocks)
|
|
if err != nil {
|
|
return objInfo, azureToObjectError(traceError(err), bucket, object)
|
|
}
|
|
if len(meta) > 0 {
|
|
prop := storage.BlobHeaders{
|
|
ContentMD5: meta["Content-Md5"],
|
|
ContentLanguage: meta["Content-Language"],
|
|
ContentEncoding: meta["Content-Encoding"],
|
|
ContentType: meta["Content-Type"],
|
|
CacheControl: meta["Cache-Control"],
|
|
}
|
|
err = a.client.SetBlobProperties(bucket, object, prop)
|
|
if err != nil {
|
|
return objInfo, azureToObjectError(traceError(err), bucket, object)
|
|
}
|
|
err = a.client.SetBlobMetadata(bucket, object, nil, meta)
|
|
if err != nil {
|
|
return objInfo, azureToObjectError(traceError(err), bucket, object)
|
|
}
|
|
}
|
|
a.metaInfo.del(uploadID)
|
|
return a.GetObjectInfo(bucket, object)
|
|
}
|
|
|
|
func anonErrToObjectErr(statusCode int, params ...string) error {
|
|
bucket := ""
|
|
object := ""
|
|
if len(params) >= 1 {
|
|
bucket = params[0]
|
|
}
|
|
if len(params) == 2 {
|
|
object = params[1]
|
|
}
|
|
|
|
switch statusCode {
|
|
case http.StatusNotFound:
|
|
if object != "" {
|
|
return ObjectNotFound{bucket, object}
|
|
}
|
|
return BucketNotFound{Bucket: bucket}
|
|
case http.StatusBadRequest:
|
|
if object != "" {
|
|
return ObjectNameInvalid{bucket, object}
|
|
}
|
|
return BucketNameInvalid{Bucket: bucket}
|
|
}
|
|
return errUnexpected
|
|
}
|
|
|
|
// Copied from github.com/Azure/azure-sdk-for-go/storage/blob.go
|
|
func azureListBlobsGetParameters(p storage.ListBlobsParameters) url.Values {
|
|
out := url.Values{}
|
|
|
|
if p.Prefix != "" {
|
|
out.Set("prefix", p.Prefix)
|
|
}
|
|
if p.Delimiter != "" {
|
|
out.Set("delimiter", p.Delimiter)
|
|
}
|
|
if p.Marker != "" {
|
|
out.Set("marker", p.Marker)
|
|
}
|
|
if p.Include != "" {
|
|
out.Set("include", p.Include)
|
|
}
|
|
if p.MaxResults != 0 {
|
|
out.Set("maxresults", fmt.Sprintf("%v", p.MaxResults))
|
|
}
|
|
if p.Timeout != 0 {
|
|
out.Set("timeout", fmt.Sprintf("%v", p.Timeout))
|
|
}
|
|
|
|
return out
|
|
}
|
|
|
|
// SetBucketPolicies - Azure supports three types of container policies:
|
|
// storage.ContainerAccessTypeContainer - readonly in minio terminology
|
|
// storage.ContainerAccessTypeBlob - readonly without listing in minio terminology
|
|
// storage.ContainerAccessTypePrivate - none in minio terminology
|
|
// As the common denominator for minio and azure is readonly and none, we support
|
|
// these two policies at the bucket level.
|
|
func (a *azureObjects) SetBucketPolicies(bucket string, policyInfo policy.BucketAccessPolicy) error {
|
|
var policies []BucketAccessPolicy
|
|
|
|
for prefix, policy := range policy.GetPolicies(policyInfo.Statements, bucket) {
|
|
policies = append(policies, BucketAccessPolicy{
|
|
Prefix: prefix,
|
|
Policy: policy,
|
|
})
|
|
}
|
|
prefix := bucket + "/*" // For all objects inside the bucket.
|
|
if len(policies) != 1 {
|
|
return traceError(NotImplemented{})
|
|
}
|
|
if policies[0].Prefix != prefix {
|
|
return traceError(NotImplemented{})
|
|
}
|
|
if policies[0].Policy != policy.BucketPolicyReadOnly {
|
|
return traceError(NotImplemented{})
|
|
}
|
|
perm := storage.ContainerPermissions{
|
|
AccessType: storage.ContainerAccessTypeContainer,
|
|
AccessPolicies: nil,
|
|
}
|
|
err := a.client.SetContainerPermissions(bucket, perm, 0, "")
|
|
return azureToObjectError(traceError(err), bucket)
|
|
}
|
|
|
|
// GetBucketPolicies - Get the container ACL and convert it to canonical []bucketAccessPolicy
|
|
func (a *azureObjects) GetBucketPolicies(bucket string) (policy.BucketAccessPolicy, error) {
|
|
policyInfo := policy.BucketAccessPolicy{Version: "2012-10-17"}
|
|
perm, err := a.client.GetContainerPermissions(bucket, 0, "")
|
|
if err != nil {
|
|
return policy.BucketAccessPolicy{}, azureToObjectError(traceError(err), bucket)
|
|
}
|
|
switch perm.AccessType {
|
|
case storage.ContainerAccessTypePrivate:
|
|
// Do nothing
|
|
case storage.ContainerAccessTypeContainer:
|
|
policyInfo.Statements = policy.SetPolicy(policyInfo.Statements, policy.BucketPolicyReadOnly, bucket, "")
|
|
default:
|
|
return policy.BucketAccessPolicy{}, azureToObjectError(traceError(NotImplemented{}))
|
|
}
|
|
return policyInfo, nil
|
|
}
|
|
|
|
// DeleteBucketPolicies - Set the container ACL to "private"
|
|
func (a *azureObjects) DeleteBucketPolicies(bucket string) error {
|
|
perm := storage.ContainerPermissions{
|
|
AccessType: storage.ContainerAccessTypePrivate,
|
|
AccessPolicies: nil,
|
|
}
|
|
err := a.client.SetContainerPermissions(bucket, perm, 0, "")
|
|
return azureToObjectError(traceError(err))
|
|
}
|