139 lines
3.3 KiB
Go
139 lines
3.3 KiB
Go
/*
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Copyright 2017 Heptio Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 azure
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import (
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"fmt"
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"io"
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"strings"
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"github.com/Azure/azure-sdk-for-go/storage"
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"github.com/heptio/ark/pkg/cloudprovider"
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)
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// ref. https://github.com/Azure-Samples/storage-blob-go-getting-started/blob/master/storageExample.go
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type objectStorageAdapter struct {
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blobClient *storage.BlobStorageClient
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}
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var _ cloudprovider.ObjectStorageAdapter = &objectStorageAdapter{}
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func (op *objectStorageAdapter) PutObject(bucket string, key string, body io.ReadSeeker) error {
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container, err := getContainerReference(op.blobClient, bucket)
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if err != nil {
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return err
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}
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blob, err := getBlobReference(container, key)
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if err != nil {
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return err
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}
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// TODO having to seek to end/back to beginning to get
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// length here is ugly. refactor to make this better.
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len, err := body.Seek(0, io.SeekEnd)
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if err != nil {
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return err
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}
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blob.Properties.ContentLength = len
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if _, err := body.Seek(0, 0); err != nil {
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return err
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}
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return blob.CreateBlockBlobFromReader(body, nil)
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}
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func (op *objectStorageAdapter) GetObject(bucket string, key string) (io.ReadCloser, error) {
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container, err := getContainerReference(op.blobClient, bucket)
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if err != nil {
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return nil, err
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}
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blob, err := getBlobReference(container, key)
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if err != nil {
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return nil, err
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}
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res, err := blob.Get(nil)
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if err != nil {
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return nil, err
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}
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return res, nil
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}
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func (op *objectStorageAdapter) ListCommonPrefixes(bucket string, delimiter string) ([]string, error) {
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container, err := getContainerReference(op.blobClient, bucket)
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if err != nil {
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return nil, err
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}
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params := storage.ListBlobsParameters{
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Delimiter: delimiter,
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}
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res, err := container.ListBlobs(params)
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if err != nil {
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return nil, err
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}
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// Azure returns prefixes inclusive of the last delimiter. We need to strip
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// it.
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ret := make([]string, 0, len(res.BlobPrefixes))
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for _, prefix := range res.BlobPrefixes {
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ret = append(ret, prefix[0:strings.LastIndex(prefix, delimiter)])
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}
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return ret, nil
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}
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func (op *objectStorageAdapter) DeleteObject(bucket string, key string) error {
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container, err := getContainerReference(op.blobClient, bucket)
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if err != nil {
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return err
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}
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blob, err := getBlobReference(container, key)
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if err != nil {
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return err
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}
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return blob.Delete(nil)
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}
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func getContainerReference(blobClient *storage.BlobStorageClient, bucket string) (*storage.Container, error) {
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container := blobClient.GetContainerReference(bucket)
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if container == nil {
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return nil, fmt.Errorf("unable to get container reference for bucket %v", bucket)
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}
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return container, nil
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}
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func getBlobReference(container *storage.Container, key string) (*storage.Blob, error) {
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blob := container.GetBlobReference(key)
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if blob == nil {
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return nil, fmt.Errorf("unable to get blob reference for key %v", key)
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}
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return blob, nil
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}
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