public void PageBlobReadLockToETagTestAPM()
{
byte[] outBuffer = new byte[1 * 1024 * 1024];
byte[] buffer = GetRandomBuffer(2 * outBuffer.Length);
CloudBlobContainer container = GetRandomContainerReference();
try
{
container.Create();
CloudPageBlob blob = container.GetPageBlobReference("blob1");
blob.StreamMinimumReadSizeInBytes = outBuffer.Length;
using (MemoryStream wholeBlob = new MemoryStream(buffer))
{
blob.UploadFromStream(wholeBlob);
}
using (AutoResetEvent waitHandle = new AutoResetEvent(false))
{
IAsyncResult result = blob.BeginOpenRead(
ar => waitHandle.Set(),
null);
waitHandle.WaitOne();
using (Stream blobStream = blob.EndOpenRead(result))
{
blobStream.Read(outBuffer, 0, outBuffer.Length);
blob.SetMetadata();
TestHelper.ExpectedException(
() => blobStream.Read(outBuffer, 0, outBuffer.Length),
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
result = blob.BeginOpenRead(
ar => waitHandle.Set(),
null);
waitHandle.WaitOne();
using (Stream blobStream = blob.EndOpenRead(result))
{
long length = blobStream.Length;
blob.SetMetadata();
TestHelper.ExpectedException(
() => blobStream.Read(outBuffer, 0, outBuffer.Length),
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
AccessCondition accessCondition = AccessCondition.GenerateIfNotModifiedSinceCondition(DateTimeOffset.Now.Subtract(TimeSpan.FromHours(1)));
blob.SetMetadata();
result = blob.BeginOpenRead(
accessCondition,
null,
null,
ar => waitHandle.Set(),
null);
waitHandle.WaitOne();
TestHelper.ExpectedException(
() => blob.EndOpenRead(result),
"Blob read stream should fail if blob is modified during read",
HttpStatusCode.PreconditionFailed);
}
}
finally
{
container.DeleteIfExists();
}
}