public async Task <bool> Handle(BlobStorageRequest message, IOutboundPort <BlobUriResponse> outputPort)
{
// Trust user guid? Ideally only authenticated controllers are getting here.
if (message.UserId == Guid.Empty)
{
return(false);
}
// compose blob name if necessary
if (string.IsNullOrWhiteSpace(message.BlobName) && message.Mode == BlobStorageRequest.Operation.Write)
{
message.BlobName = $"{message.UserId}_{DateTime.UtcNow}_{Guid.NewGuid()}";
}
// can't read a non-existent blob.
if (string.IsNullOrWhiteSpace(message.BlobName))
{
return(false);
}
if (message.Mode == BlobStorageRequest.Operation.Write)
{
if (message.Content == null)
{
return(false); // can't write with no content.
}
await _blobStore.WriteBlob(message.Category, message.BlobName, null, message.Content);
}
var uri = await _blobStore.GetBlobReadUri(message.Category, message.BlobName, 60, 60);
// call through to blob store method.
var response = new BlobUriResponse
{
Uri = uri,
ExpiresIn = 60
};
// send back response
outputPort.Handle(response);
return(true);
}
public async Task <bool> Handle(PetImageRequest message, IOutboundPort <BlobUriResponse> outputPort)
{
// verify that the user has access to the specified pet:
var user = await _userStore.GetUserById(message.UserId);
if (user == null)
{
return(false);
}
await _userStore.LoadPets(user);
var pet = user.Pets.FirstOrDefault(p => p.Id == message.PetId);
if (pet == null)
{
return(false);
}
// All pet images go to the image container/category.
const string category = Constants.StorageCategories.Images;
string blobName; // set based on execution path.
if (message.Update)
{
// Generate a new blob name (always) for pet images - ensures no conflict.
blobName = $"{message.UserId}_{message.PetId}_{Guid.NewGuid()}";
// upload the blob to storage.
await _blobStore.WriteBlob(category, blobName, message.MimeType, message.Content);
// associate a new blob entry to the pet
var entity = _entityFactory.GetBlobRecordBuilder()
.SetCategory(category)
.SetName(blobName)
.Build();
await _petStore.UpdateImage(pet, entity);
}
else
{
// load the current record from pet:
await _petStore.LoadImageRecord(pet);
blobName = pet.ProfileImage?.BlobName;
}
// check that there exists a blob associated to pet by this point.
if (blobName == null)
{
return(false);
}
var response = new BlobUriResponse
{
Uri = await _blobStore.GetBlobReadUri(category, blobName, 10, 30),
ExpiresIn = 10
};
outputPort.Handle(response);
return(true);
}