// PATCH tables/TodoItem/48D68C86-6EA6-4C25-AA33-223FC9A27959
public async Task <TodoItem> PatchTodoItem(string id, Delta <TodoItem> patch)
{
object containerName, resourceName, imageUploadpending;
// Client only sets ImageUploadPending when it has an image to upload
patch.TryGetPropertyValue("ImageUploadPending", out imageUploadpending);
if (imageUploadpending != null && ((bool)imageUploadpending == true))
{
patch.TryGetPropertyValue("ContainerName", out containerName);
patch.TryGetPropertyValue("ResourceName", out resourceName);
if (!string.IsNullOrEmpty(containerName.ToString()) && !string.IsNullOrEmpty(resourceName.ToString()))
{
var asparams = new AzureStorageParams {
ContainerName = containerName.ToString(), ResourceName = resourceName.ToString()
};
await SetTodoItemForImageUpload(asparams);
patch.TrySetPropertyValue("SasQueryString", asparams.SasQueryString);
patch.TrySetPropertyValue("AzureImageUri", asparams.AzureImageUri);
// Clear the flag also
patch.TrySetPropertyValue("ImageUploadPending", false);
}
}
return(await UpdateAsync(id, patch));
}
// POST tables/TodoItem
public async Task <IHttpActionResult> PostTodoItem(TodoItem item)
{
var asparams = new AzureStorageParams {
ContainerName = item.ContainerName, ResourceName = item.ResourceName
};
await SetTodoItemForImageUpload(asparams);
item.SasQueryString = asparams.SasQueryString;
item.AzureImageUri = asparams.AzureImageUri;
item.ImageUploadPending = false;
// Complete the insert operation.
TodoItem current = await InsertAsync(item);
// get Notification Hubs credentials associated with this Mobile App
MobileAppSettingsDictionary settings = this.Configuration.GetMobileAppSettingsProvider().GetMobileAppSettings();
string notificationHubName = settings.NotificationHubName;
string notificationHubConnection = settings.Connections[MobileAppSettingsKeys.NotificationHubConnectionString].ConnectionString;
// connect to notification hub
NotificationHubClient Hub = NotificationHubClient.CreateClientFromConnectionString(notificationHubConnection, notificationHubName);
// windows payload
var windowsToastPayload = @"<toast><visual><binding template=""ToastText01""><text id=""1"">" + item.Title + @"</text></binding></visual></toast>";
await Hub.SendWindowsNativeNotificationAsync(windowsToastPayload);
return(CreatedAtRoute("Tables", new { id = current.Id }, current));
}
private async Task SetTodoItemForImageUpload(AzureStorageParams asparams)
{
string storageAccountName;
string storageAccountKey;
MobileAppSettingsDictionary settings = this.Configuration.GetMobileAppSettingsProvider().GetMobileAppSettings();
// Try to get the Azure storage account token from app settings.
if (!(settings.TryGetValue("STORAGE_ACCOUNT_NAME", out storageAccountName) |
settings.TryGetValue("STORAGE_ACCOUNT_ACCESS_KEY", out storageAccountKey)))
{
ITraceWriter traceWriter = this.Configuration.Services.GetTraceWriter();
traceWriter.Error("Could not retrieve storage account settings.");
}
// Set the URI for the Blob Storage service.
Uri blobEndpoint = new Uri(string.Format("https://{0}.blob.core.windows.net", storageAccountName));
// Create the BLOB service client.
CloudBlobClient blobClient = new CloudBlobClient(blobEndpoint,
new StorageCredentials(storageAccountName, storageAccountKey));
if (asparams.ContainerName != null)
{
// Set the BLOB store container name on the item, which must be lowercase.
asparams.ContainerName = asparams.ContainerName.ToLower();
// Create a container, if it doesn't already exist.
CloudBlobContainer container = blobClient.GetContainerReference(asparams.ContainerName);
await container.CreateIfNotExistsAsync();
// Create a shared access permission policy.
BlobContainerPermissions containerPermissions = new BlobContainerPermissions();
// Enable anonymous read access to BLOBs.
containerPermissions.PublicAccess = BlobContainerPublicAccessType.Blob;
container.SetPermissions(containerPermissions);
// Define a policy that gives write access to the container for 5 minutes.
SharedAccessBlobPolicy sasPolicy = new SharedAccessBlobPolicy()
{
SharedAccessStartTime = DateTime.UtcNow,
SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(5),
Permissions = SharedAccessBlobPermissions.Write
};
// Get the SAS as a string.
asparams.SasQueryString = container.GetSharedAccessSignature(sasPolicy);
// Set the URL used to store the image.
asparams.AzureImageUri = string.Format("{0}{1}/{2}", blobEndpoint.ToString(),
asparams.ContainerName, asparams.ResourceName);
}
}
