PowerShell error uploading blob text to Azure: UploadText(string) - powershell

Question

I have a powershell module which attempts to upload a blob to azure storage. Everything checks out until the last line which actually uploads the blob.
I receive the following error:
Exception calling "UploadText" with "1" argument(s):
"The specified resource does not exist."
At line:1 char:1
+ $blob.UploadText("asdasdfsdf")
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : StorageClientException
I have also tried using the overload with 3 args, but the same issue exists there as well.
Here is the module:
Function Add-BlobText
{
[CmdletBinding()]
param(
[Parameter(Mandatory = $true,Position = 0)]
[string]
$StorageAccount,
[Parameter(Mandatory = $true,Position = 1)]
[string]
$Container,
[Parameter(Mandatory = $true,Position = 2)]
[string]
$BlobName,
[Parameter(Mandatory = $true, ValueFromPipeline = $true)]
[string]
$BlobText
) #end param
Add-Type -Path "C:\Assemblies\Microsoft.WindowsAzure.StorageClient.dll"
Set-AzureSubscription -SubscriptionName "MySubName"
$secondaryKey = (Get-AzureStorageKey -StorageAccountName $storageAccount).Secondary
$creds = New-Object Microsoft.WindowsAzure.StorageCredentialsAccountAndKey($StorageAccount,$secondaryKey)
$cloudStorageAccount = New-Object Microsoft.WindowsAzure.CloudStorageAccount($creds, $true)
[Microsoft.WindowsAzure.StorageClient.CloudBlobClient]$cloudBlobClient = New-Object Microsoft.WindowsAzure.StorageClient.CloudBlobClient($cloudStorageAccount.BlobEndpoint)
[Microsoft.WindowsAzure.StorageClient.CloudBlobContainer]$blobContainer = $cloudBlobClient.GetContainerReference($Container)
[Microsoft.WindowsAzure.StorageClient.CloudBlob]$blob = $blobContainer.GetBlobReference($BlobName)
$blob.UploadText($BlobText)
} #end Function Add-BlobText
Update:
I have been able to get this working as a binary module (below). If anyone can figure out why UploadText() works within a binary module but throws an exception in a script module, please let me know.
[Cmdlet(VerbsCommon.Add, "BlobText")]
public class AddBlobText : PSCmdlet
{
[Parameter(Mandatory = true, Position = 0)]
public string StorageAccount { get; set; }
[Parameter(Mandatory = true, Position = 1)]
public string Container { get; set; }
[Parameter(Mandatory = true, Position = 2)]
public string BlobName { get; set; }
[Parameter(Mandatory = true, ValueFromPipeline = true)]
public string BlobText { get; set; }
protected override void ProcessRecord()
{
PowerShell ps = PowerShell.Create();
ps.AddScript("Set-AzureSubscription -SubscriptionName 'MySubName'");
string keyScript = "( Get-AzureStorageKey -StorageAccountName " + StorageAccount + " ).Secondary";
ps.AddScript(keyScript);
Collection<PSObject> result = ps.Invoke();
string secondaryKey = result[0].ToString();
StorageCredentialsAccountAndKey credentials = new StorageCredentialsAccountAndKey(StorageAccount, secondaryKey);
CloudStorageAccount storageAccount = new CloudStorageAccount(credentials, true);
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(Container);
var blob = container.GetBlobReference(BlobName);
blob.UploadText(BlobText);
}
}

Answer 1

This is probably because your container does not exist. You should call CreateIfNotExist after initializing the container to make sure it exists:
[Microsoft.WindowsAzure.StorageClient.CloudBlobContainer]$blobContainer = $cloudBlobClient.GetContainerReference($Container)
$blobContainer.CreateIfNotExist() <-- Here
[Microsoft.WindowsAzure.StorageClient.CloudBlob]$blob = $blobContainer.GetBlobReference($BlobName)
$blob.UploadText($BlobText)

Answer 2

This error is very ambiguous and misleading but there are instances' where Azure Storage can get "confused". Looking at Sandrino's example and specifically this line,
[Microsoft.WindowsAzure.StorageClient.CloudBlob]$blob = $blobContainer.GetBlobReference($BlobName)
Not that Sandrino's answer is your issue but the exception you encountered will happen when passing a Url or possibly other confusing key strings to Azure Storage Containers.
Unfortunately I am not a Powershell guy but here is a reproducing example then fix in C#.
public void Save(string objId, T obj)
{
CloudBlob blob = this.container.GetBlobReference(objId); // Problematic if a URL
blob.Properties.ContentType = "application/json";
var serialized = string.Empty;
serialized = serializer.Serialize(obj);
if (this.jsonpSupport)
{
serialized = this.container.Name + "Callback(" + serialized + ")";
}
blob.UploadText(serialized);
}
Assume that this.container is a valid blob storage instance pointing to http://127.0.0.1:10000/devstoreaccount1/sggames or whatever you have for a valid container.
And objId is a key that contains a Url like https://www.google.com/accounts/o8/id?id=AItOawk4Dw9sLxSc-zmdWQHdZNcyzkTcvKUkhiE ...and yes this can happen, in my case this is an actual identity claim from Google using Azure ACS.
After the GetBlobReference call the blob instance has become corrupt which now looks at a messed up Uri -> https://www.google.com/accounts/o8/id?id=AItOawk4Dw9sLxSc-zmdWQHdZNcyzkTcvKUkhiE
Unfortunately the solution to simply call $blobContainer.CreateIfNotExist() is not a solution and wouldn't work. Key's that contain a Uri structure will simply be used to re-interpret the blob storage location.
The work around (other than daredev's Update) would be something like this:
if (Uri.IsWellFormedUriString(claim, UriKind.Absolute) && HttpUtility.ParseQueryString(claim).Count > 0)
{
claim = HttpUtility.ParseQueryString(claim)[0];
}
Add this code within my method above to clean up any Uri's, but you could use any appropriate method like Base64 encoding URLs if you need to maintain the full key.
Here are the before and after images showing the results as I described.
The bad:
notice the bad URI
this bad URI munged up the actual storage blob location
here is the same exception daredev had
The good:
the new scrubbed key, notice it's just the value on the URL's query string
Azure Storage URI looks good now
Eureka!
Hope this helps.

Answer 3

This is the PowerShell script I use to upload a file to Azure Blob: Uploading to Azure Storage
$SubscriptionName = ""
$SubscriptionId = ""
$DestContainer = ""
$StorageAccountName = ""
Import-AzurePublishSettingsFile -PublishSettingsFile "<Location of the publishsettings-file>"
Set-AzureSubscription -SubscriptionId $SubscriptionId -CurrentStorageAccountName $StorageAccountName
Select-AzureSubscription -SubscriptionName $SubscriptionName
Set-AzureStorageBlobContent -File "<File you want to upload>" -Container $DestContainer