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 void CreateBlobWithValidPattern()
{
// one parameter
Assert.Equal("{url}", BindableBlobPath.Create("{url}").ToString());
// one parameter with dot operator
Assert.Equal("{a.b.c}", BindableBlobPath.Create("{a.b.c}").ToString());
// full blob url
Assert.Equal("archivecontainershun/canaryeh/test/0/2017/08/01/00/09/27.avro",
BindableBlobPath.Create("https://shunsouthcentralus.blob.core.windows.net/archivecontainershun/canaryeh/test/0/2017/08/01/00/09/27.avro").ToString());
// invalid partial blob url string
ExceptionAssert.ThrowsFormat(() => BindableBlobPath.Create("shunsouthcentralus.blob.core.windows.net/container/blob"), "Invalid container name: shunsouthcentralus.blob.core.windows.net");
// more than one parameter
ExceptionAssert.ThrowsFormat(() => BindableBlobPath.Create("{hostName}+{Container}+{Blob}"), "Invalid blob path '{hostName}+{Container}+{Blob}'. Paths must be in the format 'container/blob' or 'blob Url'.");
}
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));
}