public async Task AppendBlobReadLockToETagTestAsync()
{
byte[] outBuffer = new byte[1 * 1024 * 1024];
byte[] buffer = GetRandomBuffer(2 * outBuffer.Length);
CloudBlobContainer container = GetRandomContainerReference();
try
{
await container.CreateAsync();
CloudAppendBlob blob = container.GetAppendBlobReference("blob1");
await blob.CreateOrReplaceAsync();
blob.StreamMinimumReadSizeInBytes = outBuffer.Length;
using (MemoryStream wholeBlob = new MemoryStream(buffer))
{
#if !FACADE_NETCORE
await blob.AppendBlockAsync(wholeBlob);
#else
await blob.AppendBlockAsync(wholeBlob, string.Empty, null, null, null, CancellationToken.None);
#endif
}
OperationContext opContext = new OperationContext();
using (Stream blobStream = await blob.OpenReadAsync(null, null, opContext))
{
Stream blobStreamForRead = blobStream;
await blobStreamForRead.ReadAsync(outBuffer, 0, outBuffer.Length);
await blob.SetMetadataAsync();
await TestHelper.ExpectedExceptionAsync(
async() => await blobStreamForRead.ReadAsync(outBuffer, 0, outBuffer.Length),
opContext,
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
opContext = new OperationContext();
using (Stream blobStream = await blob.OpenReadAsync(null, null, opContext))
{
Stream blobStreamForRead = blobStream;
long length = blobStreamForRead.Length;
await blob.SetMetadataAsync();
await TestHelper.ExpectedExceptionAsync(
async() => await blobStreamForRead.ReadAsync(outBuffer, 0, outBuffer.Length),
opContext,
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
opContext = new OperationContext();
AccessCondition accessCondition = AccessCondition.GenerateIfNotModifiedSinceCondition(DateTimeOffset.Now.Subtract(TimeSpan.FromHours(1)));
await blob.SetMetadataAsync();
await TestHelper.ExpectedExceptionAsync(
async() => await blob.OpenReadAsync(accessCondition, null, opContext),
opContext,
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
finally
{
container.DeleteIfExistsAsync().Wait();
}
}