private static CloudBlob GetBlobReference(CloudBlobDirectory directory, CloudBlob blob)
{
CloudBlob cloudBlob = null;
// [longwen] You can use cloudBlob.BlobType to check the blob type here
switch (blob.GetType().Name)
{
case nameof(CloudBlockBlob):
cloudBlob = directory.GetBlockBlobReference(blob.Name);
break;
case nameof(CloudPageBlob):
cloudBlob = directory.GetPageBlobReference(blob.Name);
break;
case nameof(CloudAppendBlob):
cloudBlob = directory.GetAppendBlobReference(blob.Name);
break;
default:
throw new Exception("Unknown CloudBlob type");
}
return(cloudBlob);
}
public async Task Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post")] HttpRequest req,
[Queue("queue-chatxx-images")] IAsyncCollector <Message> queue,
[Blob("storage-chatxx/images")] CloudBlobDirectory container
, [SignalR(HubName = "chat")] IAsyncCollector <SignalRMessage> signalRMessages
)
{
var form = await req.ReadFormAsync();
var name = form[nameof(Message.Name).ToLowerInvariant()].Single();
var file = form.Files.Single();
var message = new Message {
Name = "<i>system</i>",
Content = $"<i>{name} uploaded {file.FileName} {file.Length} bytes, processing..</i>"
};
var format = new SignalRMessage {
Target = "newMessage",
Arguments = new Message[1] {
message
}
};
await signalRMessages.AddAsync(format);
var pref = DateTime.Now.Ticks.ToString("X16");
var xx = container.GetAppendBlobReference($"{pref}_{file.FileName}");
await xx.CreateOrReplaceAsync();
await xx.AppendFromStreamAsync(file.OpenReadStream());
await queue.AddAsync(new Message
{
Name = name,
Tags = new[] {
nameof(file), xx.Uri.AbsoluteUri,
nameof(file.ContentType), file.ContentType,
nameof(file.Length), $"{file.Length} bytes",
}
});
}
public virtual CloudAppendBlobEx GetAppendBlobReference(string blobName)
{
if (blobName == null)
{
throw new ArgumentNullException(nameof(blobName));
}
CloudAppendBlob[] cloudAppendBlobArray = new CloudAppendBlob[this.failoverExecutor.AllElements.Length];
for (int i = 0; i < this.failoverExecutor.AllElements.Length; i++)
{
CloudBlobDirectory directory = this.failoverExecutor.AllElements[i];
CloudAppendBlob cloudAppendBlob = directory.GetAppendBlobReference(blobName);
cloudAppendBlobArray[i] = cloudAppendBlob;
}
CloudAppendBlobEx cloudAppendBlobEx = new CloudAppendBlobEx(this.Container, this.failoverExecutor.FailoverToken, cloudAppendBlobArray);
return(cloudAppendBlobEx);
}
public CloudAppendBlob GetAppendBlob(string containerName, string directoryPath, string fileName, bool fetchAttributes)
{
CloudAppendBlob blob;
CloudBlobContainer container = GetBlobContainer(containerName);
if (string.IsNullOrEmpty(directoryPath))
{
blob = container.GetAppendBlobReference(fileName);
}
else
{
CloudBlobDirectory directory = container.GetDirectoryReference(directoryPath);
blob = directory.GetAppendBlobReference(fileName);
}
if (fetchAttributes)
{
blob.FetchAttributesAsync().Wait();
}
return(blob);
}
