public override Collection <Attribute> GetAttributes()
{
Collection <Attribute> attributes = new Collection <Attribute>();
string path = Context.GetMetadataValue <string>("path");
Attribute attribute = null;
if (Context.IsTrigger)
{
attribute = new BlobTriggerAttribute(path);
}
else
{
attribute = new BlobAttribute(path, Context.Access);
}
attributes.Add(attribute);
var connectionProvider = (IConnectionProvider)attribute;
string connection = Context.GetMetadataValue <string>("connection");
if (!string.IsNullOrEmpty(connection))
{
connectionProvider.Connection = connection;
}
return(attributes);
}
public async Task <ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
{
ParameterInfo parameter = context.Parameter;
BlobTriggerAttribute blobTriggerAttribute = parameter.GetCustomAttribute <BlobTriggerAttribute>(inherit: false);
if (blobTriggerAttribute == null)
{
return(null);
}
string resolvedCombinedPath = Resolve(blobTriggerAttribute.BlobPath);
IBlobPathSource path = BlobPathSource.Create(resolvedCombinedPath);
IArgumentBinding <IStorageBlob> argumentBinding = _provider.TryCreate(parameter, access: null);
if (argumentBinding == null)
{
throw new InvalidOperationException("Can't bind BlobTrigger to type '" + parameter.ParameterType + "'.");
}
IStorageAccount hostAccount = await _accountProvider.GetStorageAccountAsync(context.CancellationToken);
IStorageAccount dataAccount = await _accountProvider.GetStorageAccountAsync(context.Parameter, context.CancellationToken, _nameResolver);
ITriggerBinding binding = new BlobTriggerBinding(parameter, argumentBinding, hostAccount, dataAccount, path,
_hostIdProvider, _queueConfiguration, _backgroundExceptionDispatcher, _blobWrittenWatcherSetter,
_messageEnqueuedWatcherSetter, _sharedContextProvider, _trace);
return(binding);
}
public async Task <ITriggerBinding> TryCreateAsync(TriggerBindingProviderContext context)
{
ParameterInfo parameter = context.Parameter;
BlobTriggerAttribute blobTriggerAttribute = parameter.GetCustomAttribute <BlobTriggerAttribute>(inherit: false);
if (blobTriggerAttribute == null)
{
return(null);
}
string resolvedCombinedPath = Resolve(blobTriggerAttribute.BlobPath);
IBlobPathSource path = BlobPathSource.Create(resolvedCombinedPath);
IArgumentBinding <IStorageBlob> argumentBinding = _provider.TryCreate(parameter, access: null);
if (argumentBinding == null)
{
throw new InvalidOperationException("Can't bind BlobTrigger to type '" + parameter.ParameterType + "'.");
}
IStorageAccount hostAccount = await _accountProvider.GetStorageAccountAsync(context.CancellationToken);
IStorageAccount dataAccount = await _accountProvider.GetStorageAccountAsync(context.Parameter, context.CancellationToken, _nameResolver);
// premium does not support blob logs, so disallow for blob triggers
dataAccount.AssertTypeOneOf(StorageAccountType.GeneralPurpose, StorageAccountType.BlobOnly);
ITriggerBinding binding = new BlobTriggerBinding(parameter, argumentBinding, hostAccount, dataAccount, path,
_hostIdProvider, _queueConfiguration, _exceptionHandler, _blobWrittenWatcherSetter,
_messageEnqueuedWatcherSetter, _sharedContextProvider, _singletonManager, _trace);
return(binding);
}
// BlobClient is simplified version of BlockBlobClient, i.e. upload results in creation of block blob.
private BlobClient ConvertBlobBaseClientToBlobClient(BlobBaseClient input, BlobTriggerAttribute attr)
{
if (input is BlockBlobClient)
{
var client = _blobServiceClientProvider.Get(attr.Connection);
var blob = client.GetBlobContainerClient(input.BlobContainerName).GetBlobClient(input.Name);
return(blob);
}
else
{
throw new InvalidOperationException($"The blob is not an {typeof(BlockBlobClient).Name}.");
}
}
public void GenerateBlobTriggerFunction()
{
BlobBindingMetadata trigger = new BlobBindingMetadata
{
Type = BindingType.BlobTrigger,
Path = "foo/bar"
};
MethodInfo method = GenerateMethod(trigger);
VerifyCommonProperties(method);
// verify trigger parameter
ParameterInfo parameter = method.GetParameters()[0];
Assert.Equal("input", parameter.Name);
Assert.Equal(typeof(Stream), parameter.ParameterType);
BlobTriggerAttribute attribute = parameter.GetCustomAttribute <BlobTriggerAttribute>();
Assert.Equal("foo/bar", attribute.BlobPath);
}
public void GenerateBlobTriggerFunction()
{
BindingMetadata trigger = BindingMetadata.Create(new JObject
{
{ "type", "blobTrigger" },
{ "name", "input" },
{ "direction", "in" },
{ "path", "foo/bar" }
});
MethodInfo method = GenerateMethod(trigger);
VerifyCommonProperties(method);
// verify trigger parameter
ParameterInfo parameter = method.GetParameters()[0];
Assert.Equal("input", parameter.Name);
Assert.Equal(typeof(Stream), parameter.ParameterType);
BlobTriggerAttribute attribute = parameter.GetCustomAttribute <BlobTriggerAttribute>();
Assert.Equal("foo/bar", attribute.BlobPath);
}
