public async Task <IBinding> TryCreateAsync(BindingProviderContext context)
{
ParameterInfo parameter = context.Parameter;
BlobAttribute blob = parameter.GetCustomAttribute <BlobAttribute>(inherit: false);
if (blob == null)
{
return(null);
}
string resolvedCombinedPath = Resolve(blob.BlobPath);
IBindableBlobPath path = BindableBlobPath.Create(resolvedCombinedPath);
path.ValidateContractCompatibility(context.BindingDataContract);
IBlobArgumentBinding argumentBinding = _provider.TryCreate(parameter, blob.Access);
if (argumentBinding == null)
{
throw new InvalidOperationException("Can't bind Blob to type '" + parameter.ParameterType + "'.");
}
IStorageAccount account = await _accountProvider.GetStorageAccountAsync(context.CancellationToken);
IStorageBlobClient client = account.CreateBlobClient();
IBinding binding = new BlobBinding(parameter.Name, argumentBinding, client, path);
return(binding);
}
public BlobContainerBinding(string parameterName, IArgumentBinding <IStorageBlobContainer> argumentBinding, IStorageBlobClient client,
IBindableBlobPath path)
{
_parameterName = parameterName;
_argumentBinding = argumentBinding;
_client = client;
_path = path;
}
public BlobContainerBinding(string parameterName, IArgumentBinding<IStorageBlobContainer> argumentBinding, IStorageBlobClient client,
IBindableBlobPath path)
{
_parameterName = parameterName;
_argumentBinding = argumentBinding;
_client = client;
_path = path;
}
public BlobBinding(string parameterName, IBlobArgumentBinding argumentBinding, IStorageBlobClient client, IBindableBlobPath path)
{
_parameterName = parameterName;
_argumentBinding = argumentBinding;
_client = client;
_accountName = BlobClient.GetAccountName(client);
_path = path;
_converter = CreateConverter(_client, path, argumentBinding.ValueType);
}
public BlobBinding(string parameterName, IBlobArgumentBinding argumentBinding, IStorageBlobClient client, IBindableBlobPath path)
{
_parameterName = parameterName;
_argumentBinding = argumentBinding;
_client = client;
_accountName = BlobClient.GetAccountName(client);
_path = path;
_converter = CreateConverter(_client, path, argumentBinding.ValueType);
}
private static IAsyncObjectToTypeConverter <IStorageBlob> CreateConverter(IStorageBlobClient client,
IBindableBlobPath path, Type argumentType)
{
return(new CompositeAsyncObjectToTypeConverter <IStorageBlob>(
new OutputConverter <IStorageBlob>(new AsyncConverter <IStorageBlob, IStorageBlob>(
new IdentityConverter <IStorageBlob>())),
new OutputConverter <ICloudBlob>(new AsyncConverter <ICloudBlob, IStorageBlob>(
new CloudBlobToStorageBlobConverter())),
new OutputConverter <string>(new StringToStorageBlobConverter(client, path, argumentType))));
}
private static IAsyncObjectToTypeConverter<IStorageBlob> CreateConverter(IStorageBlobClient client,
IBindableBlobPath path, Type argumentType)
{
return new CompositeAsyncObjectToTypeConverter<IStorageBlob>(
new BlobOutputConverter<IStorageBlob>(new AsyncConverter<IStorageBlob, IStorageBlob>(
new IdentityConverter<IStorageBlob>())),
new BlobOutputConverter<ICloudBlob>(new AsyncConverter<ICloudBlob, IStorageBlob>(
new CloudBlobToStorageBlobConverter())),
new BlobOutputConverter<string>(new StringToStorageBlobConverter(client, path, argumentType)));
}
public async Task <IBinding> TryCreateAsync(BindingProviderContext context)
{
ParameterInfo parameter = context.Parameter;
BlobAttribute blobAttribute = parameter.GetCustomAttribute <BlobAttribute>(inherit: false);
if (blobAttribute == null)
{
return(null);
}
string resolvedPath = Resolve(blobAttribute.BlobPath);
IBindableBlobPath path = null;
IStorageAccount account = await _accountProvider.GetStorageAccountAsync(context.Parameter, context.CancellationToken);
StorageClientFactoryContext clientFactoryContext = new StorageClientFactoryContext
{
Parameter = context.Parameter
};
IStorageBlobClient client = account.CreateBlobClient(clientFactoryContext);
// first try to bind to the Container
IArgumentBinding <IStorageBlobContainer> containerArgumentBinding = _blobContainerArgumentProvider.TryCreate(parameter);
if (containerArgumentBinding == null)
{
// if this isn't a Container binding, try a Blob binding
IBlobArgumentBinding blobArgumentBinding = _blobArgumentProvider.TryCreate(parameter, blobAttribute.Access);
if (blobArgumentBinding == null)
{
throw new InvalidOperationException("Can't bind Blob to type '" + parameter.ParameterType + "'.");
}
path = BindableBlobPath.Create(resolvedPath);
path.ValidateContractCompatibility(context.BindingDataContract);
return(new BlobBinding(parameter.Name, blobArgumentBinding, client, path));
}
path = BindableBlobPath.Create(resolvedPath, isContainerBinding: true);
path.ValidateContractCompatibility(context.BindingDataContract);
BlobContainerBinding.ValidateContainerBinding(blobAttribute, parameter.ParameterType, path);
return(new BlobContainerBinding(parameter.Name, containerArgumentBinding, client, path));
}
internal static void ValidateContainerBinding(BlobAttribute attribute, Type parameterType, IBindableBlobPath path)
{
if (attribute.Access != null && attribute.Access != FileAccess.Read)
{
throw new InvalidOperationException("Only the 'Read' FileAccess mode is supported for blob container bindings.");
}
if (parameterType == typeof(CloudBlobContainer) && !string.IsNullOrEmpty(path.BlobNamePattern))
{
throw new InvalidOperationException("Only a container name can be specified when binding to CloudBlobContainer.");
}
}
internal static void ValidateContainerBinding(BlobAttribute attribute, Type parameterType, IBindableBlobPath path)
{
if (attribute.Access != null && attribute.Access != FileAccess.Read)
{
throw new InvalidOperationException("Only the 'Read' FileAccess mode is supported for blob container bindings.");
}
if (parameterType == typeof(CloudBlobContainer) && !string.IsNullOrEmpty(path.BlobNamePattern))
{
throw new InvalidOperationException("Only a container name can be specified when binding to CloudBlobContainer.");
}
}
public StringToStorageBlobConverter(IStorageBlobClient client, IBindableBlobPath defaultPath, Type argumentType)
{
_client = client;
_defaultPath = defaultPath;
_argumentType = argumentType;
}