"log"
"os"
"regexp"
+ "strconv"
"strings"
"sync"
"time"
return nil
}
+// Return true if expires_at metadata attribute is found on the block
+func (v *AzureBlobVolume) checkTrashed(loc string) (bool, map[string]string, error) {
+ metadata, err := v.bsClient.GetBlobMetadata(v.containerName, loc)
+ if err != nil {
+ return false, metadata, v.translateError(err)
+ }
+ if metadata["expires_at"] != "" {
+ return true, metadata, nil
+ }
+ return false, metadata, nil
+}
+
// Get reads a Keep block that has been stored as a block blob in the
// container.
//
// unexpectedly empty, assume a PutBlob operation is in progress, and
// wait for it to finish writing.
func (v *AzureBlobVolume) Get(loc string, buf []byte) (int, error) {
+ trashed, _, err := v.checkTrashed(loc)
+ if err != nil {
+ return 0, err
+ }
+ if trashed {
+ return 0, os.ErrNotExist
+ }
var deadline time.Time
haveDeadline := false
size, err := v.get(loc, buf)
// Compare the given data with existing stored data.
func (v *AzureBlobVolume) Compare(loc string, expect []byte) error {
+ trashed, _, err := v.checkTrashed(loc)
+ if err != nil {
+ return err
+ }
+ if trashed {
+ return os.ErrNotExist
+ }
rdr, err := v.bsClient.GetBlob(v.containerName, loc)
if err != nil {
return v.translateError(err)
if v.readonly {
return MethodDisabledError
}
- return v.bsClient.SetBlobMetadata(v.containerName, loc, map[string]string{
- "touch": fmt.Sprintf("%d", time.Now()),
- }, nil)
+ trashed, metadata, err := v.checkTrashed(loc)
+ if err != nil {
+ return err
+ }
+ if trashed {
+ return os.ErrNotExist
+ }
+
+ metadata["touch"] = fmt.Sprintf("%d", time.Now())
+ return v.bsClient.SetBlobMetadata(v.containerName, loc, metadata, nil)
}
// Mtime returns the last-modified property of a block blob.
func (v *AzureBlobVolume) Mtime(loc string) (time.Time, error) {
+ trashed, _, err := v.checkTrashed(loc)
+ if err != nil {
+ return time.Time{}, err
+ }
+ if trashed {
+ return time.Time{}, os.ErrNotExist
+ }
+
props, err := v.bsClient.GetBlobProperties(v.containerName, loc)
if err != nil {
return time.Time{}, err
// container.
func (v *AzureBlobVolume) IndexTo(prefix string, writer io.Writer) error {
params := storage.ListBlobsParameters{
- Prefix: prefix,
+ Prefix: prefix,
+ Include: "metadata",
}
for {
resp, err := v.bsClient.ListBlobs(v.containerName, params)
// value.
continue
}
+ if b.Metadata["expires_at"] != "" {
+ // Trashed blob; exclude it from response
+ continue
+ }
fmt.Fprintf(writer, "%s+%d %d\n", b.Name, b.Properties.ContentLength, t.Unix())
}
if resp.NextMarker == "" {
return MethodDisabledError
}
- if trashLifetime != 0 {
- return ErrNotImplemented
- }
-
// Ideally we would use If-Unmodified-Since, but that
// particular condition seems to be ignored by Azure. Instead,
// we get the Etag before checking Mtime, and use If-Match to
} else if time.Since(t) < blobSignatureTTL {
return nil
}
- return v.bsClient.DeleteBlob(v.containerName, loc, map[string]string{
+
+ // If trashLifetime == 0, just delete it
+ if trashLifetime == 0 {
+ return v.bsClient.DeleteBlob(v.containerName, loc, map[string]string{
+ "If-Match": props.Etag,
+ })
+ }
+
+ // Otherwise, mark as trash
+ return v.bsClient.SetBlobMetadata(v.containerName, loc, map[string]string{
+ "expires_at": fmt.Sprintf("%d", time.Now().Add(trashLifetime).Unix()),
+ }, map[string]string{
"If-Match": props.Etag,
})
}
// Untrash a Keep block.
-// TBD
+// Delete the expires_at metadata attribute
func (v *AzureBlobVolume) Untrash(loc string) error {
- return ErrNotImplemented
+ // if expires_at does not exist, return NotFoundError
+ metadata, err := v.bsClient.GetBlobMetadata(v.containerName, loc)
+ if err != nil {
+ return v.translateError(err)
+ }
+ if metadata["expires_at"] == "" {
+ return os.ErrNotExist
+ }
+
+ // reset expires_at metadata attribute
+ metadata["expires_at"] = ""
+ err = v.bsClient.SetBlobMetadata(v.containerName, loc, metadata, nil)
+ return v.translateError(err)
}
// Status returns a VolumeStatus struct with placeholder data.
switch {
case err == nil:
return err
- case strings.Contains(err.Error(), "404 Not Found"):
+ case strings.Contains(err.Error(), "Not Found"):
// "storage: service returned without a response body (404 Not Found)"
return os.ErrNotExist
default:
// EmptyTrash looks for trashed blocks that exceeded trashLifetime
// and deletes them from the volume.
-// TBD
func (v *AzureBlobVolume) EmptyTrash() {
+ var bytesDeleted, bytesInTrash int64
+ var blocksDeleted, blocksInTrash int
+ params := storage.ListBlobsParameters{Include: "metadata"}
+
+ for {
+ resp, err := v.bsClient.ListBlobs(v.containerName, params)
+ if err != nil {
+ log.Printf("EmptyTrash: ListBlobs: %v", err)
+ break
+ }
+ for _, b := range resp.Blobs {
+ // Check if the block is expired
+ if b.Metadata["expires_at"] == "" {
+ continue
+ }
+
+ blocksInTrash++
+ bytesInTrash += b.Properties.ContentLength
+
+ expiresAt, err := strconv.ParseInt(b.Metadata["expires_at"], 10, 64)
+ if err != nil {
+ log.Printf("EmptyTrash: ParseInt(%v): %v", b.Metadata["expires_at"], err)
+ continue
+ }
+
+ if expiresAt > time.Now().Unix() {
+ continue
+ }
+
+ err = v.bsClient.DeleteBlob(v.containerName, b.Name, map[string]string{
+ "If-Match": b.Properties.Etag,
+ })
+ if err != nil {
+ log.Printf("EmptyTrash: DeleteBlob(%v): %v", b.Name, err)
+ continue
+ }
+ blocksDeleted++
+ bytesDeleted += b.Properties.ContentLength
+ }
+ if resp.NextMarker == "" {
+ break
+ }
+ params.Marker = resp.NextMarker
+ }
+
+ log.Printf("EmptyTrash stats for %v: Deleted %v bytes in %v blocks. Remaining in trash: %v bytes in %v blocks.", v.String(), bytesDeleted, blocksDeleted, bytesInTrash-bytesDeleted, blocksInTrash-blocksDeleted)
}
h.blobs[container+"|"+hash] = &azBlob{
Data: data,
Mtime: time.Now(),
+ Metadata: make(map[string]string),
Uncommitted: make(map[string][]byte),
}
}
h.blobs[container+"|"+hash] = &azBlob{
Mtime: time.Now(),
Uncommitted: make(map[string][]byte),
+ Metadata: make(map[string]string),
Etag: makeEtag(),
}
h.unlockAndRace()
}
+ metadata := make(map[string]string)
+ for k, v := range r.Header {
+ if strings.HasPrefix(strings.ToLower(k), "x-ms-meta-") {
+ name := k[len("x-ms-meta-"):]
+ metadata[strings.ToLower(name)] = v[0]
+ }
+ }
h.blobs[container+"|"+hash] = &azBlob{
Data: body,
Mtime: time.Now(),
Uncommitted: make(map[string][]byte),
+ Metadata: metadata,
Etag: makeEtag(),
}
rw.WriteHeader(http.StatusCreated)
blob.Metadata = make(map[string]string)
for k, v := range r.Header {
if strings.HasPrefix(strings.ToLower(k), "x-ms-meta-") {
- blob.Metadata[k] = v[0]
+ name := k[len("x-ms-meta-"):]
+ blob.Metadata[strings.ToLower(name)] = v[0]
}
}
blob.Mtime = time.Now()
blob.Etag = makeEtag()
+ case (r.Method == "GET" || r.Method == "HEAD") && r.Form.Get("comp") == "metadata" && hash != "":
+ // "Get Blob Metadata" API
+ if !blobExists {
+ rw.WriteHeader(http.StatusNotFound)
+ return
+ }
+ for k, v := range blob.Metadata {
+ rw.Header().Set(fmt.Sprintf("x-ms-meta-%s", k), v)
+ }
+ return
case (r.Method == "GET" || r.Method == "HEAD") && hash != "":
// "Get Blob" API
if !blobExists {
}
if len(resp.Blobs) > 0 || marker == "" || marker == hash {
blob := h.blobs[container+"|"+hash]
- resp.Blobs = append(resp.Blobs, storage.Blob{
+ bmeta := map[string]string(nil)
+ if r.Form.Get("include") == "metadata" {
+ bmeta = blob.Metadata
+ }
+ b := storage.Blob{
Name: hash,
Properties: storage.BlobProperties{
LastModified: blob.Mtime.Format(time.RFC1123),
ContentLength: int64(len(blob.Data)),
Etag: blob.Etag,
},
- })
+ Metadata: bmeta,
+ }
+ resp.Blobs = append(resp.Blobs, b)
}
}
buf, err := xml.Marshal(resp)
if _, err := v.Get(TestHash, data); err == nil || !os.IsNotExist(err) {
t.Errorf("os.IsNotExist(%v) should have been true", err)
}
+
+ _, err := v.Mtime(TestHash)
+ if err == nil || !os.IsNotExist(err) {
+ t.Fatalf("os.IsNotExist(%v) should have been true", err)
+ }
+
+ err = v.Compare(TestHash, TestBlock)
+ if err == nil || !os.IsNotExist(err) {
+ t.Fatalf("os.IsNotExist(%v) should have been true", err)
+ }
+
+ indexBuf := new(bytes.Buffer)
+ v.IndexTo("", indexBuf)
+ if strings.Contains(string(indexBuf.Bytes()), TestHash) {
+ t.Fatalf("Found trashed block in IndexTo")
+ }
+
+ err = v.Touch(TestHash)
+ if err == nil || !os.IsNotExist(err) {
+ t.Fatalf("os.IsNotExist(%v) should have been true", err)
+ }
}
// Calling Delete() for a block that does not exist should result in error.
err = v.Trash(TestHash)
if v.Writable() == false {
if err != MethodDisabledError {
- t.Error(err)
+ t.Fatal(err)
}
} else if err != nil {
if err != ErrNotImplemented {
- t.Error(err)
+ t.Fatal(err)
}
} else {
_, err = v.Get(TestHash, buf)
if bytes.Compare(buf[:n], TestBlock) != 0 {
t.Fatalf("Got data %+q, expected %+q", buf[:n], TestBlock)
}
+
+ _, err = v.Mtime(TestHash)
+ if err != nil {
+ return err
+ }
+
+ err = v.Compare(TestHash, TestBlock)
+ if err != nil {
+ return err
+ }
+
+ indexBuf := new(bytes.Buffer)
+ v.IndexTo("", indexBuf)
+ if !strings.Contains(string(indexBuf.Bytes()), TestHash) {
+ return os.ErrNotExist
+ }
+
return nil
}
t.Fatal(err)
}
+ // Trash the block
err = v.Trash(TestHash)
if err == MethodDisabledError || err == ErrNotImplemented {
// Skip the trash tests for read-only volumes, and
t.Fatalf("os.IsNotExist(%v) should have been true", err)
}
+ err = v.Touch(TestHash)
+ if err == nil || !os.IsNotExist(err) {
+ t.Fatalf("os.IsNotExist(%v) should have been true", err)
+ }
+
v.EmptyTrash()
// Even after emptying the trash, we can untrash our block
if err != nil {
t.Fatal(err)
}
+
err = checkGet()
if err != nil {
t.Fatal(err)
}
+ err = v.Touch(TestHash)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ // Because we Touch'ed, need to backdate again for next set of tests
+ v.TouchWithDate(TestHash, time.Now().Add(-2*blobSignatureTTL))
+
// Untrash should fail if the only block in the trash has
// already been untrashed.
err = v.Untrash(TestHash)
// Trash it again, and this time call EmptyTrash so it really
// goes away.
+ // (In Azure volumes, un/trash changes Mtime, so first backdate again)
+ v.TouchWithDate(TestHash, time.Now().Add(-2*blobSignatureTTL))
err = v.Trash(TestHash)
err = checkGet()
if err == nil || !os.IsNotExist(err) {
- t.Errorf("os.IsNotExist(%v) should have been true", err)
+ t.Fatalf("os.IsNotExist(%v) should have been true", err)
}
+ // EmptryTrash
v.EmptyTrash()
// Untrash won't find it
projects / arvados.git / commitdiff