/// <summary>
/// Constructor.
/// </summary>
/// <param name="allowModifications">
/// If false, a <see cref="RequestFailedException"/> will be thrown if the blob is modified while
/// it is being read from.
/// </param>
public BlobOpenReadOptions(bool allowModifications)
{
// Setting the Conditions to empty means we won't automatically
// use the ETag as a condition and it will be possible for the blob
// to change while it's being read from.
if (allowModifications)
{
Conditions = new BlobRequestConditions();
}
}
/// <summary>
/// Deep copy constructor.
/// </summary>
/// <param name="deepCopySource"></param>
private BlobDownloadOptions(BlobDownloadOptions deepCopySource)
{
Argument.AssertNotNull(deepCopySource, nameof(deepCopySource));
Range = new HttpRange(offset: deepCopySource.Range.Offset, length: deepCopySource.Range.Length);
Conditions = BlobRequestConditions.CloneOrDefault(deepCopySource.Conditions);
// can't access an internal deep copy in Storage.Common
TransactionalHashingOptions = deepCopySource.TransactionalHashingOptions == default
? default
: new DownloadTransactionalHashingOptions()
{
Algorithm = deepCopySource.TransactionalHashingOptions.Algorithm,
Validate = deepCopySource.TransactionalHashingOptions.Validate
};
}
/// <summary>
/// Deep copy constructor.
/// </summary>
/// <param name="deepCopySource"></param>
private BlobDownloadOptions(BlobDownloadOptions deepCopySource)
{
Argument.AssertNotNull(deepCopySource, nameof(deepCopySource));
Range = new HttpRange(offset: deepCopySource.Range.Offset, length: deepCopySource.Range.Length);
Conditions = BlobRequestConditions.CloneOrDefault(deepCopySource.Conditions);
ProgressHandler = deepCopySource.ProgressHandler;
// can't access an internal deep copy in Storage.Common
// TODO #27253
//TransactionalHashingOptions = deepCopySource.TransactionalHashingOptions == default
// ? default
// : new DownloadTransactionalHashingOptions()
// {
// Algorithm = deepCopySource.TransactionalHashingOptions.Algorithm,
// Validate = deepCopySource.TransactionalHashingOptions.Validate
// };
}
public async Task <bool> TryCreateAsync(BlockBlobClient blob, CancellationToken cancellationToken)
{
Dictionary <string, string> metadata = new Dictionary <string, string>();
BlobReceipt.Incomplete.ToMetadata(metadata);
BlobRequestConditions accessCondition = new BlobRequestConditions {
IfNoneMatch = new ETag("*")
};
bool isContainerNotFoundException = false;
try
{
await blob.UploadAsync(
new MemoryStream(),
new BlobUploadOptions()
{
Conditions = accessCondition,
Metadata = metadata,
},
cancellationToken : cancellationToken
).ConfigureAwait(false);
return(true);
}
catch (RequestFailedException exception)
{
if (exception.IsNotFoundContainerNotFound())
{
isContainerNotFoundException = true;
}
else if (exception.IsConflictBlobAlreadyExists())
{
return(false);
}
else if (exception.IsPreconditionFailedLeaseIdMissing())
{
return(false);
}
else
{
throw;
}
}
Debug.Assert(isContainerNotFoundException);
await _blobContainerClient.CreateIfNotExistsAsync(cancellationToken : cancellationToken).ConfigureAwait(false);
try
{
await blob.UploadAsync(
new MemoryStream(),
new BlobUploadOptions()
{
Conditions = accessCondition,
Metadata = metadata,
},
cancellationToken : cancellationToken
).ConfigureAwait(false);
return(true);
}
catch (RequestFailedException exception)
{
if (exception.IsConflictBlobAlreadyExists())
{
return(false);
}
else if (exception.IsPreconditionFailedLeaseIdMissing())
{
return(false);
}
else
{
throw;
}
}
}
/// <summary>
/// Creates a deep copy of the given instance, if any.
/// </summary>
/// <param name="deepCopySource">Instance to deep copy.</param>
/// <returns>The deep copy, or null.</returns>
internal static BlobRequestConditions CloneOrDefault(BlobRequestConditions deepCopySource)
{
if (deepCopySource == default)
{
return(default);
private BlobRequestConditions(BlobRequestConditions deepCopySource) : base(deepCopySource)
{
Argument.AssertNotNull(deepCopySource, nameof(deepCopySource));
LeaseId = deepCopySource.LeaseId;
}