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147 lines
3.8 KiB
Go
147 lines
3.8 KiB
Go
package azuresink
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import (
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"bytes"
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"context"
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"fmt"
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"net/url"
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"strings"
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"github.com/Azure/azure-storage-blob-go/azblob"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/replication/sink"
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"github.com/chrislusf/seaweedfs/weed/replication/source"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type AzureSink struct {
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containerURL azblob.ContainerURL
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container string
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dir string
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filerSource *source.FilerSource
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}
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func init() {
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sink.Sinks = append(sink.Sinks, &AzureSink{})
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}
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func (g *AzureSink) GetName() string {
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return "azure"
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}
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func (g *AzureSink) GetSinkToDirectory() string {
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return g.dir
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}
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func (g *AzureSink) Initialize(configuration util.Configuration, prefix string) error {
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return g.initialize(
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configuration.GetString(prefix+"account_name"),
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configuration.GetString(prefix+"account_key"),
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configuration.GetString(prefix+"container"),
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configuration.GetString(prefix+"directory"),
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)
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}
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func (g *AzureSink) SetSourceFiler(s *source.FilerSource) {
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g.filerSource = s
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}
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func (g *AzureSink) initialize(accountName, accountKey, container, dir string) error {
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g.container = container
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g.dir = dir
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// Use your Storage account's name and key to create a credential object.
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credential, err := azblob.NewSharedKeyCredential(accountName, accountKey)
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if err != nil {
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glog.Fatalf("failed to create Azure credential with account name:%s key:%s", accountName, accountKey)
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}
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// Create a request pipeline that is used to process HTTP(S) requests and responses.
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p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
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// Create an ServiceURL object that wraps the service URL and a request pipeline.
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u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", accountName))
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serviceURL := azblob.NewServiceURL(*u, p)
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g.containerURL = serviceURL.NewContainerURL(g.container)
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return nil
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}
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func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
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key = cleanKey(key)
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if isDirectory {
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key = key + "/"
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}
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if _, err := g.containerURL.NewBlobURL(key).Delete(context.Background(),
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azblob.DeleteSnapshotsOptionInclude, azblob.BlobAccessConditions{}); err != nil {
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return fmt.Errorf("azure delete %s/%s: %v", g.container, key, err)
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}
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return nil
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}
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func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
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key = cleanKey(key)
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if entry.IsDirectory {
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return nil
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}
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totalSize := filer2.FileSize(entry)
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chunkViews := filer2.ViewFromChunks(g.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
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// Create a URL that references a to-be-created blob in your
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// Azure Storage account's container.
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appendBlobURL := g.containerURL.NewAppendBlobURL(key)
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_, err := appendBlobURL.Create(context.Background(), azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
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if err != nil {
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return err
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}
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for _, chunk := range chunkViews {
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fileUrl, err := g.filerSource.LookupFileId(chunk.FileId)
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if err != nil {
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return err
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}
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var writeErr error
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readErr := util.ReadUrlAsStream(fileUrl, nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
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_, writeErr = appendBlobURL.AppendBlock(context.Background(), bytes.NewReader(data), azblob.AppendBlobAccessConditions{}, nil)
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})
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if readErr != nil {
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return readErr
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}
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if writeErr != nil {
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return writeErr
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}
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}
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return nil
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}
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func (g *AzureSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
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key = cleanKey(key)
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// TODO improve efficiency
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return false, nil
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}
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func cleanKey(key string) string {
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if strings.HasPrefix(key, "/") {
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key = key[1:]
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}
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return key
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}
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