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package azuresink
import (
"bytes"
"context"
"fmt"
"net/url"
"strings"
"github.com/Azure/azure-storage-blob-go/azblob"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/replication/sink"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/util"
)
type AzureSink struct {
containerURL azblob.ContainerURL
container string
dir string
filerSource *source.FilerSource
}
func init() {
sink.Sinks = append(sink.Sinks, &AzureSink{})
}
func (g *AzureSink) GetName() string {
return "azure"
}
func (g *AzureSink) GetSinkToDirectory() string {
return g.dir
}
func (g *AzureSink) Initialize(configuration util.Configuration, prefix string) error {
return g.initialize(
configuration.GetString(prefix+"account_name"),
configuration.GetString(prefix+"account_key"),
configuration.GetString(prefix+"container"),
configuration.GetString(prefix+"directory"),
)
}
func (g *AzureSink) SetSourceFiler(s *source.FilerSource) {
g.filerSource = s
}
func (g *AzureSink) initialize(accountName, accountKey, container, dir string) error {
g.container = container
g.dir = dir
// Use your Storage account's name and key to create a credential object.
credential, err := azblob.NewSharedKeyCredential(accountName, accountKey)
if err != nil {
glog.Fatalf("failed to create Azure credential with account name:%s key:%s", accountName, accountKey)
}
// Create a request pipeline that is used to process HTTP(S) requests and responses.
p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
// Create an ServiceURL object that wraps the service URL and a request pipeline.
u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", accountName))
serviceURL := azblob.NewServiceURL(*u, p)
g.containerURL = serviceURL.NewContainerURL(g.container)
return nil
}
func (g *AzureSink) DeleteEntry(ctx context.Context, key string, isDirectory, deleteIncludeChunks bool) error {
key = cleanKey(key)
if isDirectory {
key = key + "/"
}
if _, err := g.containerURL.NewBlobURL(key).Delete(ctx,
azblob.DeleteSnapshotsOptionInclude, azblob.BlobAccessConditions{}); err != nil {
return fmt.Errorf("azure delete %s/%s: %v", g.container, key, err)
}
return nil
}
func (g *AzureSink) CreateEntry(ctx context.Context, key string, entry *filer_pb.Entry) error {
key = cleanKey(key)
if entry.IsDirectory {
return nil
}
totalSize := filer2.TotalSize(entry.Chunks)
chunkViews := filer2.ViewFromChunks(entry.Chunks, 0, int(totalSize))
// Create a URL that references a to-be-created blob in your
// Azure Storage account's container.
appendBlobURL := g.containerURL.NewAppendBlobURL(key)
_, err := appendBlobURL.Create(ctx, azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
if err != nil {
return err
}
for _, chunk := range chunkViews {
fileUrl, err := g.filerSource.LookupFileId(ctx, chunk.FileId)
if err != nil {
return err
}
var writeErr error
_, readErr := util.ReadUrlAsStream(fileUrl, chunk.Offset, int(chunk.Size), func(data []byte) {
_, writeErr = appendBlobURL.AppendBlock(ctx, bytes.NewReader(data), azblob.AppendBlobAccessConditions{}, nil)
})
if readErr != nil {
return readErr
}
if writeErr != nil {
return writeErr
}
}
return nil
}
func (g *AzureSink) UpdateEntry(ctx context.Context, key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
key = cleanKey(key)
// TODO improve efficiency
return false, nil
}
func cleanKey(key string) string {
if strings.HasPrefix(key, "/") {
key = key[1:]
}
return key
}
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