protected void SignButton_Click(object sender, EventArgs e)
{
if (this.FileUpload1.HasFile)
{
this.InitializeStorage();
// upload the image to blob storage
string uniqueBlobName = string.Format("guestbookpics/image_{0}{1}", Guid.NewGuid().ToString(), Path.GetExtension(this.FileUpload1.FileName));
CloudBlockBlob blob = blobStorage.GetBlockBlobReference(uniqueBlobName);
blob.Properties.ContentType = this.FileUpload1.PostedFile.ContentType;
blob.UploadFromStream(this.FileUpload1.FileContent);
System.Diagnostics.Trace.TraceInformation("Uploaded image '{0}' to blob storage as '{1}'", this.FileUpload1.FileName, uniqueBlobName);
// create a new entry in table storage
GuestBookEntry entry = new GuestBookEntry() { GuestName = this.NameTextBox.Text, Message = this.MessageTextBox.Text, PhotoUrl = blob.Uri.ToString(), ThumbnailUrl = blob.Uri.ToString() };
GuestBookDataSource ds = new GuestBookDataSource();
ds.AddGuestBookEntry(entry);
System.Diagnostics.Trace.TraceInformation("Added entry {0}-{1} in table storage for guest '{2}'", entry.PartitionKey, entry.RowKey, entry.GuestName);
// queue a message to process the image
var queue = queueStorage.GetQueueReference("guestthumbs");
var message = new CloudQueueMessage(string.Format("{0},{1},{2}", blob.Uri.ToString(), entry.PartitionKey, entry.RowKey));
queue.AddMessage(message);
System.Diagnostics.Trace.TraceInformation("Queued message to process blob '{0}'", uniqueBlobName);
}
this.NameTextBox.Text = string.Empty;
this.MessageTextBox.Text = string.Empty;
this.DataList1.DataBind();
}
protected void SignButton_Click(object sender, EventArgs e)
{
if (this.FileUpload1.HasFile)
{
this.InitializeStorage();
// upload the image to blob storage
string uniqueBlobName = string.Format("guestbookpics/image_{0}{1}", Guid.NewGuid().ToString(), Path.GetExtension(this.FileUpload1.FileName));
string blobUri = _storage.AddToBucket("guestbookpics1", uniqueBlobName, this.FileUpload1.FileContent);
System.Diagnostics.Trace.TraceInformation("Uploaded image '{0}' to blob storage as '{1}'", this.FileUpload1.FileName, uniqueBlobName);
// create a new entry in table storage
var entry = new GuestBookEntry() { GuestName = this.NameTextBox.Text, Message = this.MessageTextBox.Text, PhotoUrl = blobUri, ThumbnailUrl = blobUri };
var ds = new GuestBookDataSource();
ds.AddGuestBookEntry(entry);
System.Diagnostics.Trace.TraceInformation("Added entry {0} in table storage for guest '{1}'", entry.Id, entry.GuestName);
// queue a message to process the image
var queue = _queue.GetQueueById("guestthumbs");
var message = string.Format("{0},{1}", blobUri, entry.Id);
_queue.SendMessage(queue, message);
System.Diagnostics.Trace.TraceInformation("Queued message to process blob '{0}'", uniqueBlobName);
}
this.NameTextBox.Text = string.Empty;
this.MessageTextBox.Text = string.Empty;
this.DataList1.DataBind();
}
public override void Run()
{
Trace.TraceInformation("Listening for queue messages...");
while (true)
{
try
{
// retrieve a new message from the queue
CloudQueueMessage msg = this.queue.GetMessage();
if (msg != null)
{
// parse message retrieved from queue
var messageParts = msg.AsString.Split(new char[] { ',' });
var imageBlobUri = messageParts[0];
var partitionKey = messageParts[1];
var rowkey = messageParts[2];
Trace.TraceInformation("Processing image in blob '{0}'.", imageBlobUri);
string thumbnailBlobUri = System.Text.RegularExpressions.Regex.Replace(imageBlobUri, "([^\\.]+)(\\.[^\\.]+)?$", "$1-thumb$2");
CloudBlob inputBlob = this.container.GetBlobReference(imageBlobUri);
CloudBlob outputBlob = this.container.GetBlobReference(thumbnailBlobUri);
using (BlobStream input = inputBlob.OpenRead())
using (BlobStream output = outputBlob.OpenWrite())
{
this.ProcessImage(input, output);
// commit the blob and set its properties
output.Commit();
outputBlob.Properties.ContentType = "image/jpeg";
outputBlob.SetProperties();
// update the entry in table storage to point to the thumbnail
GuestBookDataSource ds = new GuestBookDataSource();
ds.UpdateImageThumbnail(partitionKey, rowkey, thumbnailBlobUri);
// remove message from queue
this.queue.DeleteMessage(msg);
Trace.TraceInformation("Generated thumbnail in blob '{0}'.", thumbnailBlobUri);
}
}
else
{
System.Threading.Thread.Sleep(1000);
}
}
catch (StorageClientException e)
{
Trace.TraceError("Exception when processing queue item. Message: '{0}'", e.Message);
System.Threading.Thread.Sleep(5000);
}
}
}
public override void Run()
{
// This is a sample worker implementation. Replace with your logic.
Trace.TraceInformation("GuestBook_WorkerRole entry point is called", "Information");
while (true)
{
try
{
// TODO: Retrieve a new message from the queue
CloudQueueMessage newMessage = _queueStorage.GetNewMessage();
if (newMessage != null)
{
var newMessageParts = newMessage.AsString.Split(new [] {','});
var imageBlobName = newMessageParts[0];
var partitionKey = newMessageParts[1];
var rowKey = newMessageParts[2];
Trace.TraceInformation("Processing image in blob '{0}'", imageBlobName);
string thumbnailName = System.Text.RegularExpressions.Regex.Replace(imageBlobName, "([^\\.]+)(\\.[^\\.]+)?$", "$1-thumb$2");
Trace.TraceInformation("Generated Thumbnail name = '{0}'", thumbnailName);
CloudBlockBlob inputBlob = _blobStorage.GetBlockBlobReference(imageBlobName);
CloudBlockBlob outputBlob = _blobStorage.GetBlockBlobReference(thumbnailName);
using(Stream inputStream = inputBlob.OpenRead())
using (Stream outputStream = outputBlob.OpenWrite())
{
processImage(inputStream, outputStream);
outputBlob.Properties.ContentType = inputBlob.Properties.ContentType;
string outputBlobUri = outputBlob.Uri.ToString();
// Update related Guestbook entry in the table storage to point to the thumbnail's Uri
GuestBookDataSource guestBookDataSource = new GuestBookDataSource();
guestBookDataSource.UpdateImageThumbnail(partitionKey, rowKey, outputBlobUri);
// Remove the message from queue
_queueStorage.DeleteMessage(newMessage);
Trace.TraceInformation("Generated thumbnail in blob '{0}'.", outputBlobUri);
}
}
}
catch (Exception exception)
{
Trace.TraceError("Exception when processing queue item. Message: '{0}'", exception.Message);
Thread.Sleep(5000);
}
}
}
private static void createNewEntryInCloudTableStorage(string name, string message, string uploadedFileBlobUri,
out string newEntryPartitionKey, out string newEntryRowKey)
{
var newGuestBookEntry = new GuestBookEntry
{
GuestName = name,
Comment = message,
PhotoUrl = uploadedFileBlobUri,
ThumbnailUrl = uploadedFileBlobUri
};
var guestBookDataSource = new GuestBookDataSource();
guestBookDataSource.AddGuestBookEntry(newGuestBookEntry);
newEntryPartitionKey = newGuestBookEntry.PartitionKey;
newEntryRowKey = newGuestBookEntry.RowKey;
Trace.TraceInformation("Added entry {0}-{1} in table storage for guest '{2}'", newEntryPartitionKey,
newEntryRowKey, newGuestBookEntry.GuestName);
}
private IEnumerable<GuestBookEntryModel> retrieveGuestBookEntries()
{
var guestBookDataSource = new GuestBookDataSource();
return guestBookDataSource.GetCurrentGuestBookEntries().ToMvcModels<GuestBookEntry, GuestBookItemModel>();
}
