public async Task CloudBlobSnapshotAsync()
{
CloudBlobContainer container = GetRandomContainerReference();
try
{
await container.CreateAsync();
MemoryStream originalData = new MemoryStream(GetRandomBuffer(1024));
CloudBlockBlob blockBlob = container.GetBlockBlobReference(BlobName);
await blockBlob.UploadFromStreamAsync(originalData);
CloudBlob blob = container.GetBlobReference(BlobName);
await blob.FetchAttributesAsync();
Assert.IsFalse(blob.IsSnapshot);
Assert.IsNull(blob.SnapshotTime, "Root blob has SnapshotTime set");
Assert.IsFalse(blob.SnapshotQualifiedUri.Query.Contains("snapshot"));
Assert.AreEqual(blob.Uri, blob.SnapshotQualifiedUri);
CloudBlob snapshot1 = await blob.SnapshotAsync();
Assert.AreEqual(blob.Properties.ETag, snapshot1.Properties.ETag);
Assert.AreEqual(blob.Properties.LastModified, snapshot1.Properties.LastModified);
Assert.IsTrue(snapshot1.IsSnapshot);
Assert.IsNotNull(snapshot1.SnapshotTime, "Snapshot does not have SnapshotTime set");
Assert.AreEqual(blob.Uri, snapshot1.Uri);
Assert.AreNotEqual(blob.SnapshotQualifiedUri, snapshot1.SnapshotQualifiedUri);
Assert.AreNotEqual(snapshot1.Uri, snapshot1.SnapshotQualifiedUri);
Assert.IsTrue(snapshot1.SnapshotQualifiedUri.Query.Contains("snapshot"));
CloudBlob snapshot2 = await blob.SnapshotAsync();
Assert.IsTrue(snapshot2.SnapshotTime.Value > snapshot1.SnapshotTime.Value);
await snapshot1.FetchAttributesAsync();
await snapshot2.FetchAttributesAsync();
await blob.FetchAttributesAsync();
AssertAreEqual(snapshot1.Properties, blob.Properties);
CloudBlob snapshot1Clone = new CloudBlob(new Uri(blob.Uri + "?snapshot=" + snapshot1.SnapshotTime.Value.ToString("O")), blob.ServiceClient.Credentials);
Assert.IsNotNull(snapshot1Clone.SnapshotTime, "Snapshot clone does not have SnapshotTime set");
Assert.AreEqual(snapshot1.SnapshotTime.Value, snapshot1Clone.SnapshotTime.Value);
await snapshot1Clone.FetchAttributesAsync();
AssertAreEqual(snapshot1.Properties, snapshot1Clone.Properties);
// The query parser should not be case sensitive in detecting a snapshot in the query string
CloudBlob snapshotParseVerifier = new CloudBlob(new Uri(blob.Uri + "?sNapshOt=" + snapshot1.SnapshotTime.Value.ToString("O")), blob.ServiceClient.Credentials);
Assert.IsNotNull(snapshotParseVerifier.SnapshotTime, "Snapshot parse verifier did not successfully detect the snapshot time");
Assert.AreEqual(snapshot1.SnapshotTime.Value, snapshotParseVerifier.SnapshotTime.Value);
CloudBlob snapshotCopy = container.GetBlobReference("blob2");
await snapshotCopy.StartCopyAsync(TestHelper.Defiddler(snapshot1.Uri));
await WaitForCopyAsync(snapshotCopy);
Assert.AreEqual(CopyStatus.Success, snapshotCopy.CopyState.Status);
using (Stream snapshotStream = (await snapshot1.OpenReadAsync()))
{
snapshotStream.Seek(0, SeekOrigin.End);
TestHelper.AssertStreamsAreEqual(originalData, snapshotStream);
}
await blockBlob.PutBlockListAsync(new List <string>());
await blob.FetchAttributesAsync();
using (Stream snapshotStream = (await snapshot1.OpenReadAsync()))
{
snapshotStream.Seek(0, SeekOrigin.End);
TestHelper.AssertStreamsAreEqual(originalData, snapshotStream);
}
BlobResultSegment resultSegment = await container.ListBlobsSegmentedAsync(null, true, BlobListingDetails.All, null, null, null, null);
List <IListBlobItem> blobs = resultSegment.Results.ToList();
Assert.AreEqual(4, blobs.Count);
AssertAreEqual(snapshot1, (CloudBlob)blobs[0]);
AssertAreEqual(snapshot2, (CloudBlob)blobs[1]);
AssertAreEqual(blob, (CloudBlob)blobs[2]);
AssertAreEqual(snapshotCopy, (CloudBlob)blobs[3]);
}
finally
{
await container.DeleteAsync();;
}
}
public async Task CloudBlobSnapshotTask()
{
CloudBlobContainer container = GetRandomContainerReference();
try
{
await container.CreateAsync();
var blobName = GetRandomBlobName();
MemoryStream originalData = new MemoryStream(GetRandomBuffer(1024));
CloudAppendBlob appendBlob = container.GetAppendBlobReference(blobName);
await appendBlob.CreateOrReplaceAsync();
await appendBlob.AppendBlockAsync(originalData, null);
CloudBlob blob = container.GetBlobReference(blobName);
await blob.FetchAttributesAsync();
CloudBlob snapshot1 = await blob.SnapshotAsync();
Assert.AreEqual(blob.Properties.ETag, snapshot1.Properties.ETag);
Assert.AreEqual(blob.Properties.LastModified, snapshot1.Properties.LastModified);
Assert.IsTrue(snapshot1.IsSnapshot);
Assert.IsNotNull(snapshot1.SnapshotTime, "Snapshot does not have SnapshotTime set");
Assert.AreEqual(blob.Uri, snapshot1.Uri);
Assert.AreNotEqual(blob.SnapshotQualifiedUri, snapshot1.SnapshotQualifiedUri);
Assert.AreNotEqual(snapshot1.Uri, snapshot1.SnapshotQualifiedUri);
Assert.IsTrue(snapshot1.SnapshotQualifiedUri.Query.Contains("snapshot"));
CloudBlob snapshot2 = await blob.SnapshotAsync();
Assert.IsTrue(snapshot2.SnapshotTime.Value > snapshot1.SnapshotTime.Value);
await snapshot1.FetchAttributesAsync();
await snapshot2.FetchAttributesAsync();
await blob.FetchAttributesAsync();
AssertAreEqual(snapshot1.Properties, blob.Properties);
CloudBlob snapshot1Clone = new CloudBlob(new Uri(blob.Uri + "?snapshot=" + snapshot1.SnapshotTime.Value.ToString("O")), blob.ServiceClient.Credentials);
Assert.IsNotNull(snapshot1Clone.SnapshotTime, "Snapshot clone does not have SnapshotTime set");
Assert.AreEqual(snapshot1.SnapshotTime.Value, snapshot1Clone.SnapshotTime.Value);
await snapshot1Clone.FetchAttributesAsync();
AssertAreEqual(snapshot1.Properties, snapshot1Clone.Properties);
CloudBlob snapshotCopy = container.GetBlobReference("blob2");
await snapshotCopy.StartCopyAsync(snapshot1.Uri, null, null, null, null);
await WaitForCopyAsync(snapshotCopy);
Assert.AreEqual(CopyStatus.Success, snapshotCopy.CopyState.Status);
using (Stream snapshotStream = await snapshot1.OpenReadAsync())
{
snapshotStream.Seek(0, SeekOrigin.End);
TestHelper.AssertStreamsAreEqual(originalData, snapshotStream);
}
//overwriting will create another snapshot
await appendBlob.CreateOrReplaceAsync();
await blob.FetchAttributesAsync();
using (Stream snapshotStream = await snapshot1.OpenReadAsync())
{
snapshotStream.Seek(0, SeekOrigin.End);
TestHelper.AssertStreamsAreEqual(originalData, snapshotStream);
}
await Task.Delay(500);
List <IListBlobItem> blobs =
(await container.ListBlobsSegmentedAsync(null, true, BlobListingDetails.All, null, null, null, null))
.Results
.ToList();
Assert.AreEqual(4, blobs.Count);
AssertAreEqual(snapshotCopy, (CloudBlob)blobs[0]);
AssertAreEqual(snapshot1, (CloudBlob)blobs[1]);
AssertAreEqual(snapshot2, (CloudBlob)blobs[2]);
AssertAreEqual(blob, (CloudBlob)blobs[3]);
}
finally
{
await container.DeleteIfExistsAsync();
}
}
